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pcache1.c

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1/*-
2** 2008 November 05-
3**-
4** The author disclaims copyright to this source code. In place of-
5** a legal notice, here is a blessing:-
6**-
7** May you do good and not evil.-
8** May you find forgiveness for yourself and forgive others.-
9** May you share freely, never taking more than you give.-
10**-
11*************************************************************************-
12**-
13** This file implements the default page cache implementation (the-
14** sqlite3_pcache interface). It also contains part of the implementation-
15** of the SQLITE_CONFIG_PAGECACHE and sqlite3_release_memory() features.-
16** If the default page cache implementation is overridden, then neither of-
17** these two features are available.-
18**-
19** A Page cache line looks like this:-
20**-
21** --------------------------------------------------------------
22** | database page content | PgHdr1 | MemPage | PgHdr |-
23** --------------------------------------------------------------
24**-
25** The database page content is up front (so that buffer overreads tend to-
26** flow harmlessly into the PgHdr1, MemPage, and PgHdr extensions). MemPage-
27** is the extension added by the btree.c module containing information such-
28** as the database page number and how that database page is used. PgHdr-
29** is added by the pcache.c layer and contains information used to keep track-
30** of which pages are "dirty". PgHdr1 is an extension added by this-
31** module (pcache1.c). The PgHdr1 header is a subclass of sqlite3_pcache_page.-
32** PgHdr1 contains information needed to look up a page by its page number.-
33** The superclass sqlite3_pcache_page.pBuf points to the start of the-
34** database page content and sqlite3_pcache_page.pExtra points to PgHdr.-
35**-
36** The size of the extension (MemPage+PgHdr+PgHdr1) can be determined at-
37** runtime using sqlite3_config(SQLITE_CONFIG_PCACHE_HDRSZ, &size). The-
38** sizes of the extensions sum to 272 bytes on x64 for 3.8.10, but this-
39** size can vary according to architecture, compile-time options, and-
40** SQLite library version number.-
41**-
42** If SQLITE_PCACHE_SEPARATE_HEADER is defined, then the extension is obtained-
43** using a separate memory allocation from the database page content. This-
44** seeks to overcome the "clownshoe" problem (also called "internal-
45** fragmentation" in academic literature) of allocating a few bytes more-
46** than a power of two with the memory allocator rounding up to the next-
47** power of two, and leaving the rounded-up space unused.-
48**-
49** This module tracks pointers to PgHdr1 objects. Only pcache.c communicates-
50** with this module. Information is passed back and forth as PgHdr1 pointers.-
51**-
52** The pcache.c and pager.c modules deal pointers to PgHdr objects.-
53** The btree.c module deals with pointers to MemPage objects.-
54**-
55** SOURCE OF PAGE CACHE MEMORY:-
56**-
57** Memory for a page might come from any of three sources:-
58**-
59** (1) The general-purpose memory allocator - sqlite3Malloc()-
60** (2) Global page-cache memory provided using sqlite3_config() with-
61** SQLITE_CONFIG_PAGECACHE.-
62** (3) PCache-local bulk allocation.-
63**-
64** The third case is a chunk of heap memory (defaulting to 100 pages worth)-
65** that is allocated when the page cache is created. The size of the local-
66** bulk allocation can be adjusted using -
67**-
68** sqlite3_config(SQLITE_CONFIG_PAGECACHE, (void*)0, 0, N).-
69**-
70** If N is positive, then N pages worth of memory are allocated using a single-
71** sqlite3Malloc() call and that memory is used for the first N pages allocated.-
72** Or if N is negative, then -1024*N bytes of memory are allocated and used-
73** for as many pages as can be accomodated.-
74**-
75** Only one of (2) or (3) can be used. Once the memory available to (2) or-
76** (3) is exhausted, subsequent allocations fail over to the general-purpose-
77** memory allocator (1).-
78**-
79** Earlier versions of SQLite used only methods (1) and (2). But experiments-
80** show that method (3) with N==100 provides about a 5% performance boost for-
81** common workloads.-
82*/-
83#include "sqliteInt.h"-
84-
85typedef struct PCache1 PCache1;-
86typedef struct PgHdr1 PgHdr1;-
87typedef struct PgFreeslot PgFreeslot;-
88typedef struct PGroup PGroup;-
89-
90/*-
91** Each cache entry is represented by an instance of the following -
92** structure. Unless SQLITE_PCACHE_SEPARATE_HEADER is defined, a buffer of-
93** PgHdr1.pCache->szPage bytes is allocated directly before this structure -
94** in memory.-
95*/-
96struct PgHdr1 {-
97 sqlite3_pcache_page page; /* Base class. Must be first. pBuf & pExtra */-
98 unsigned int iKey; /* Key value (page number) */-
99 u8 isBulkLocal; /* This page from bulk local storage */-
100 u8 isAnchor; /* This is the PGroup.lru element */-
101 PgHdr1 *pNext; /* Next in hash table chain */-
102 PCache1 *pCache; /* Cache that currently owns this page */-
103 PgHdr1 *pLruNext; /* Next in LRU list of unpinned pages */-
104 PgHdr1 *pLruPrev; /* Previous in LRU list of unpinned pages */-
105};-
106-
107/*-
108** A page is pinned if it is no on the LRU list-
109*/-
110#define PAGE_IS_PINNED(p) ((p)->pLruNext==0)-
111#define PAGE_IS_UNPINNED(p) ((p)->pLruNext!=0)-
112-
113/* Each page cache (or PCache) belongs to a PGroup. A PGroup is a set -
114** of one or more PCaches that are able to recycle each other's unpinned-
115** pages when they are under memory pressure. A PGroup is an instance of-
116** the following object.-
117**-
118** This page cache implementation works in one of two modes:-
119**-
120** (1) Every PCache is the sole member of its own PGroup. There is-
121** one PGroup per PCache.-
122**-
123** (2) There is a single global PGroup that all PCaches are a member-
124** of.-
125**-
126** Mode 1 uses more memory (since PCache instances are not able to rob-
127** unused pages from other PCaches) but it also operates without a mutex,-
128** and is therefore often faster. Mode 2 requires a mutex in order to be-
129** threadsafe, but recycles pages more efficiently.-
130**-
131** For mode (1), PGroup.mutex is NULL. For mode (2) there is only a single-
132** PGroup which is the pcache1.grp global variable and its mutex is-
133** SQLITE_MUTEX_STATIC_LRU.-
134*/-
135struct PGroup {-
136 sqlite3_mutex *mutex; /* MUTEX_STATIC_LRU or NULL */-
137 unsigned int nMaxPage; /* Sum of nMax for purgeable caches */-
138 unsigned int nMinPage; /* Sum of nMin for purgeable caches */-
139 unsigned int mxPinned; /* nMaxpage + 10 - nMinPage */-
140 unsigned int nPurgeable; /* Number of purgeable pages allocated */-
141 PgHdr1 lru; /* The beginning and end of the LRU list */-
142};-
143-
144/* Each page cache is an instance of the following object. Every-
145** open database file (including each in-memory database and each-
146** temporary or transient database) has a single page cache which-
147** is an instance of this object.-
148**-
149** Pointers to structures of this type are cast and returned as -
150** opaque sqlite3_pcache* handles.-
151*/-
152struct PCache1 {-
153 /* Cache configuration parameters. Page size (szPage) and the purgeable-
154 ** flag (bPurgeable) and the pnPurgeable pointer are all set when the-
155 ** cache is created and are never changed thereafter. nMax may be -
156 ** modified at any time by a call to the pcache1Cachesize() method.-
157 ** The PGroup mutex must be held when accessing nMax.-
158 */-
159 PGroup *pGroup; /* PGroup this cache belongs to */-
160 unsigned int *pnPurgeable; /* Pointer to pGroup->nPurgeable */-
161 int szPage; /* Size of database content section */-
162 int szExtra; /* sizeof(MemPage)+sizeof(PgHdr) */-
163 int szAlloc; /* Total size of one pcache line */-
164 int bPurgeable; /* True if cache is purgeable */-
165 unsigned int nMin; /* Minimum number of pages reserved */-
166 unsigned int nMax; /* Configured "cache_size" value */-
167 unsigned int n90pct; /* nMax*9/10 */-
168 unsigned int iMaxKey; /* Largest key seen since xTruncate() */-
169-
170 /* Hash table of all pages. The following variables may only be accessed-
171 ** when the accessor is holding the PGroup mutex.-
172 */-
173 unsigned int nRecyclable; /* Number of pages in the LRU list */-
174 unsigned int nPage; /* Total number of pages in apHash */-
175 unsigned int nHash; /* Number of slots in apHash[] */-
176 PgHdr1 **apHash; /* Hash table for fast lookup by key */-
177 PgHdr1 *pFree; /* List of unused pcache-local pages */-
178 void *pBulk; /* Bulk memory used by pcache-local */-
179};-
180-
181/*-
182** Free slots in the allocator used to divide up the global page cache-
183** buffer provided using the SQLITE_CONFIG_PAGECACHE mechanism.-
184*/-
185struct PgFreeslot {-
186 PgFreeslot *pNext; /* Next free slot */-
187};-
188-
189/*-
190** Global data used by this cache.-
191*/-
192static SQLITE_WSD struct PCacheGlobal {-
193 PGroup grp; /* The global PGroup for mode (2) */-
194-
195 /* Variables related to SQLITE_CONFIG_PAGECACHE settings. The-
196 ** szSlot, nSlot, pStart, pEnd, nReserve, and isInit values are all-
197 ** fixed at sqlite3_initialize() time and do not require mutex protection.-
198 ** The nFreeSlot and pFree values do require mutex protection.-
199 */-
200 int isInit; /* True if initialized */-
201 int separateCache; /* Use a new PGroup for each PCache */-
202 int nInitPage; /* Initial bulk allocation size */ -
203 int szSlot; /* Size of each free slot */-
204 int nSlot; /* The number of pcache slots */-
205 int nReserve; /* Try to keep nFreeSlot above this */-
206 void *pStart, *pEnd; /* Bounds of global page cache memory */-
207 /* Above requires no mutex. Use mutex below for variable that follow. */-
208 sqlite3_mutex *mutex; /* Mutex for accessing the following: */-
209 PgFreeslot *pFree; /* Free page blocks */-
210 int nFreeSlot; /* Number of unused pcache slots */-
211 /* The following value requires a mutex to change. We skip the mutex on-
212 ** reading because (1) most platforms read a 32-bit integer atomically and-
213 ** (2) even if an incorrect value is read, no great harm is done since this-
214 ** is really just an optimization. */-
215 int bUnderPressure; /* True if low on PAGECACHE memory */-
216} pcache1_g;-
217-
218/*-
219** All code in this file should access the global structure above via the-
220** alias "pcache1". This ensures that the WSD emulation is used when-
221** compiling for systems that do not support real WSD.-
222*/-
223#define pcache1 (GLOBAL(struct PCacheGlobal, pcache1_g))-
224-
225/*-
226** Macros to enter and leave the PCache LRU mutex.-
227*/-
228#if !defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) || SQLITE_THREADSAFE==0-
229# define pcache1EnterMutex(X) assert((X)->mutex==0)-
230# define pcache1LeaveMutex(X) assert((X)->mutex==0)-
231# define PCACHE1_MIGHT_USE_GROUP_MUTEX 0-
232#else-
233# define pcache1EnterMutex(X) sqlite3_mutex_enter((X)->mutex)-
234# define pcache1LeaveMutex(X) sqlite3_mutex_leave((X)->mutex)-
235# define PCACHE1_MIGHT_USE_GROUP_MUTEX 1-
236#endif-
237-
238/******************************************************************************/-
239/******** Page Allocation/SQLITE_CONFIG_PCACHE Related Functions **************/-
240-
241-
242/*-
243** This function is called during initialization if a static buffer is -
244** supplied to use for the page-cache by passing the SQLITE_CONFIG_PAGECACHE-
245** verb to sqlite3_config(). Parameter pBuf points to an allocation large-
246** enough to contain 'n' buffers of 'sz' bytes each.-
247**-
248** This routine is called from sqlite3_initialize() and so it is guaranteed-
249** to be serialized already. There is no need for further mutexing.-
250*/-
251void sqlite3PCacheBufferSetup(void *pBuf, int sz, int n){-
252 if( pcache1.isInit ){
(pcache1_g).isInitDescription
TRUEevaluated 529 times by 438 tests
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FALSEevaluated 1 time by 1 test
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1-529
253 PgFreeslot *p;-
254 if( pBuf==0 ) sz = n = 0;
executed 523 times by 438 tests: sz = n = 0;
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pBuf==0Description
TRUEevaluated 523 times by 438 tests
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FALSEevaluated 6 times by 1 test
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6-523
255 if( n==0 ) sz = 0;
executed 523 times by 438 tests: sz = 0;
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n==0Description
TRUEevaluated 523 times by 438 tests
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FALSEevaluated 6 times by 1 test
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6-523
256 sz = ROUNDDOWN8(sz);-
257 pcache1.szSlot = sz;-
258 pcache1.nSlot = pcache1.nFreeSlot = n;-
259 pcache1.nReserve = n>90 ? 10 : (n/10 + 1);
n>90Description
TRUEevaluated 1 time by 1 test
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260 pcache1.pStart = pBuf;-
261 pcache1.pFree = 0;-
262 pcache1.bUnderPressure = 0;-
263 while( n-- ){
n--Description
TRUEevaluated 260 times by 1 test
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260-529
264 p = (PgFreeslot*)pBuf;-
265 p->pNext = pcache1.pFree;-
266 pcache1.pFree = p;-
267 pBuf = (void*)&((char*)pBuf)[sz];-
268 }
executed 260 times by 1 test: end of block
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260
269 pcache1.pEnd = pBuf;-
270 }
executed 529 times by 438 tests: end of block
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529
271}
executed 530 times by 438 tests: end of block
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530
272-
273/*-
274** Try to initialize the pCache->pFree and pCache->pBulk fields. Return-
275** true if pCache->pFree ends up containing one or more free pages.-
276*/-
277static int pcache1InitBulk(PCache1 *pCache){-
278 i64 szBulk;-
279 char *zBulk;-
280 if( pcache1.nInitPage==0 ) return 0;
executed 419 times by 1 test: return 0;
Executed by:
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(pcache1_g).nInitPage==0Description
TRUEevaluated 419 times by 1 test
Evaluated by:
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FALSEevaluated 81849 times by 435 tests
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419-81849
281 /* Do not bother with a bulk allocation if the cache size very small */-
282 if( pCache->nMax<3 ) return 0;
executed 242 times by 1 test: return 0;
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pCache->nMax<3Description
TRUEevaluated 242 times by 1 test
Evaluated by:
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FALSEevaluated 81607 times by 435 tests
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242-81607
283 sqlite3BeginBenignMalloc();-
284 if( pcache1.nInitPage>0 ){
(pcache1_g).nInitPage>0Description
TRUEevaluated 81607 times by 435 tests
Evaluated by:
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FALSEnever evaluated
0-81607
285 szBulk = pCache->szAlloc * (i64)pcache1.nInitPage;-
286 }else{
executed 81607 times by 435 tests: end of block
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287 szBulk = -1024 * (i64)pcache1.nInitPage;-
288 }
never executed: end of block
0
289 if( szBulk > pCache->szAlloc*(i64)pCache->nMax ){
szBulk > pCach...4)pCache->nMaxDescription
TRUEevaluated 9 times by 1 test
Evaluated by:
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FALSEevaluated 81598 times by 435 tests
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  • Self test (117)
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  • Self test (119)
  • Self test (12)
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  • ...
9-81598
290 szBulk = pCache->szAlloc*(i64)pCache->nMax;-
291 }
executed 9 times by 1 test: end of block
Executed by:
  • Self test (438)
9
292 zBulk = pCache->pBulk = sqlite3Malloc( szBulk );-
293 sqlite3EndBenignMalloc();-
294 if( zBulk ){
zBulkDescription
TRUEevaluated 81591 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
FALSEevaluated 16 times by 1 test
Evaluated by:
  • Self test (438)
16-81591
295 int nBulk = sqlite3MallocSize(zBulk)/pCache->szAlloc;-
296 do{-
297 PgHdr1 *pX = (PgHdr1*)&zBulk[pCache->szPage];-
298 pX->page.pBuf = zBulk;-
299 pX->page.pExtra = &pX[1];-
300 pX->isBulkLocal = 1;-
301 pX->isAnchor = 0;-
302 pX->pNext = pCache->pFree;-
303 pCache->pFree = pX;-
304 zBulk += pCache->szAlloc;-
305 }while( --nBulk );
executed 1631730 times by 435 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
--nBulkDescription
TRUEevaluated 1550139 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
FALSEevaluated 81591 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
81591-1631730
306 }
executed 81591 times by 435 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
81591
307 return pCache->pFree!=0;
executed 81607 times by 435 tests: return pCache->pFree!=0;
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
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  • Self test (119)
  • Self test (12)
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  • ...
81607
308}-
309-
310/*-
311** Malloc function used within this file to allocate space from the buffer-
312** configured using sqlite3_config(SQLITE_CONFIG_PAGECACHE) option. If no -
313** such buffer exists or there is no space left in it, this function falls -
314** back to sqlite3Malloc().-
315**-
316** Multiple threads can run this routine at the same time. Global variables-
317** in pcache1 need to be protected via mutex.-
318*/-
319static void *pcache1Alloc(int nByte){-
320 void *p = 0;-
321 assert( sqlite3_mutex_notheld(pcache1.grp.mutex) );-
322 if( nByte<=pcache1.szSlot ){
nByte<=(pcache1_g).szSlotDescription
TRUEevaluated 2132 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 1754078 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
2132-1754078
323 sqlite3_mutex_enter(pcache1.mutex);-
324 p = (PgHdr1 *)pcache1.pFree;-
325 if( p ){
pDescription
TRUEevaluated 2131 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 1 time by 1 test
Evaluated by:
  • Self test (438)
1-2131
326 pcache1.pFree = pcache1.pFree->pNext;-
327 pcache1.nFreeSlot--;-
328 pcache1.bUnderPressure = pcache1.nFreeSlot<pcache1.nReserve;-
329 assert( pcache1.nFreeSlot>=0 );-
330 sqlite3StatusHighwater(SQLITE_STATUS_PAGECACHE_SIZE, nByte);-
331 sqlite3StatusUp(SQLITE_STATUS_PAGECACHE_USED, 1);-
332 }
executed 2131 times by 1 test: end of block
Executed by:
  • Self test (438)
2131
333 sqlite3_mutex_leave(pcache1.mutex);-
334 }
executed 2132 times by 1 test: end of block
Executed by:
  • Self test (438)
2132
335 if( p==0 ){
p==0Description
TRUEevaluated 1754079 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 2131 times by 1 test
Evaluated by:
  • Self test (438)
2131-1754079
336 /* Memory is not available in the SQLITE_CONFIG_PAGECACHE pool. Get-
337 ** it from sqlite3Malloc instead.-
338 */-
339 p = sqlite3Malloc(nByte);-
340#ifndef SQLITE_DISABLE_PAGECACHE_OVERFLOW_STATS-
341 if( p ){
pDescription
TRUEevaluated 1754049 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 30 times by 1 test
Evaluated by:
  • Self test (438)
30-1754049
342 int sz = sqlite3MallocSize(p);-
343 sqlite3_mutex_enter(pcache1.mutex);-
344 sqlite3StatusHighwater(SQLITE_STATUS_PAGECACHE_SIZE, nByte);-
345 sqlite3StatusUp(SQLITE_STATUS_PAGECACHE_OVERFLOW, sz);-
346 sqlite3_mutex_leave(pcache1.mutex);-
347 }
executed 1754049 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
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  • ...
1754049
348#endif-
349 sqlite3MemdebugSetType(p, MEMTYPE_PCACHE);-
350 }
executed 1754079 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
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  • Self test (114)
  • Self test (115)
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  • ...
1754079
351 return p;
executed 1756210 times by 438 tests: return p;
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
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  • ...
1756210
352}-
353-
354/*-
355** Free an allocated buffer obtained from pcache1Alloc().-
356*/-
357static void pcache1Free(void *p){-
358 if( p==0 ) return;
executed 101802 times by 438 tests: return;
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
p==0Description
TRUEevaluated 101802 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 1712084 times by 401 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (137)
  • Self test (138)
  • Self test (139)
  • Self test (14)
  • Self test (140)
  • Self test (141)
  • Self test (142)
  • Self test (143)
  • Self test (144)
  • Self test (145)
  • Self test (146)
  • Self test (147)
  • Self test (148)
  • Self test (149)
  • Self test (15)
  • ...
101802-1712084
359 if( SQLITE_WITHIN(p, pcache1.pStart, pcache1.pEnd) ){
((uptr)(p)>=(u...e1_g).pStart))Description
TRUEevaluated 1711155 times by 401 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (137)
  • Self test (138)
  • Self test (139)
  • Self test (14)
  • Self test (140)
  • Self test (141)
  • Self test (142)
  • Self test (143)
  • Self test (144)
  • Self test (145)
  • Self test (146)
  • Self test (147)
  • Self test (148)
  • Self test (149)
  • Self test (15)
  • ...
FALSEevaluated 929 times by 1 test
Evaluated by:
  • Self test (438)
((uptr)(p)<(up...che1_g).pEnd))Description
TRUEevaluated 2131 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 1709024 times by 401 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (137)
  • Self test (138)
  • Self test (139)
  • Self test (14)
  • Self test (140)
  • Self test (141)
  • Self test (142)
  • Self test (143)
  • Self test (144)
  • Self test (145)
  • Self test (146)
  • Self test (147)
  • Self test (148)
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  • Self test (15)
  • ...
929-1711155
360 PgFreeslot *pSlot;-
361 sqlite3_mutex_enter(pcache1.mutex);-
362 sqlite3StatusDown(SQLITE_STATUS_PAGECACHE_USED, 1);-
363 pSlot = (PgFreeslot*)p;-
364 pSlot->pNext = pcache1.pFree;-
365 pcache1.pFree = pSlot;-
366 pcache1.nFreeSlot++;-
367 pcache1.bUnderPressure = pcache1.nFreeSlot<pcache1.nReserve;-
368 assert( pcache1.nFreeSlot<=pcache1.nSlot );-
369 sqlite3_mutex_leave(pcache1.mutex);-
370 }else{
executed 2131 times by 1 test: end of block
Executed by:
  • Self test (438)
2131
371 assert( sqlite3MemdebugHasType(p, MEMTYPE_PCACHE) );-
372 sqlite3MemdebugSetType(p, MEMTYPE_HEAP);-
373#ifndef SQLITE_DISABLE_PAGECACHE_OVERFLOW_STATS-
374 {-
375 int nFreed = 0;-
376 nFreed = sqlite3MallocSize(p);-
377 sqlite3_mutex_enter(pcache1.mutex);-
378 sqlite3StatusDown(SQLITE_STATUS_PAGECACHE_OVERFLOW, nFreed);-
379 sqlite3_mutex_leave(pcache1.mutex);-
380 }-
381#endif-
382 sqlite3_free(p);-
383 }
executed 1709953 times by 401 tests: end of block
Executed by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (137)
  • Self test (138)
  • Self test (139)
  • Self test (14)
  • Self test (140)
  • Self test (141)
  • Self test (142)
  • Self test (143)
  • Self test (144)
  • Self test (145)
  • Self test (146)
  • Self test (147)
  • Self test (148)
  • Self test (149)
  • Self test (15)
  • ...
1709953
384}-
385-
386#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT-
387/*-
388** Return the size of a pcache allocation-
389*/-
390static int pcache1MemSize(void *p){-
391 if( p>=pcache1.pStart && p<pcache1.pEnd ){-
392 return pcache1.szSlot;-
393 }else{-
394 int iSize;-
395 assert( sqlite3MemdebugHasType(p, MEMTYPE_PCACHE) );-
396 sqlite3MemdebugSetType(p, MEMTYPE_HEAP);-
397 iSize = sqlite3MallocSize(p);-
398 sqlite3MemdebugSetType(p, MEMTYPE_PCACHE);-
399 return iSize;-
400 }-
401}-
402#endif /* SQLITE_ENABLE_MEMORY_MANAGEMENT */-
403-
404/*-
405** Allocate a new page object initially associated with cache pCache.-
406*/-
407static PgHdr1 *pcache1AllocPage(PCache1 *pCache, int benignMalloc){-
408 PgHdr1 *p = 0;-
409 void *pPg;-
410-
411 assert( sqlite3_mutex_held(pCache->pGroup->mutex) );-
412 if( pCache->pFree || (pCache->nPage==0 && pcache1InitBulk(pCache)) ){
pCache->pFreeDescription
TRUEevaluated 378860 times by 432 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
FALSEevaluated 920876 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
pCache->nPage==0Description
TRUEevaluated 82268 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
FALSEevaluated 838608 times by 333 tests
Evaluated by:
  • Self test (100)
  • Self test (101)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
  • Self test (127)
  • Self test (128)
  • Self test (129)
  • Self test (130)
  • Self test (131)
  • Self test (132)
  • Self test (133)
  • Self test (134)
  • Self test (135)
  • Self test (136)
  • Self test (137)
  • Self test (138)
  • Self test (139)
  • Self test (140)
  • Self test (141)
  • Self test (142)
  • Self test (143)
  • Self test (144)
  • ...
pcache1InitBulk(pCache)Description
TRUEevaluated 81591 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
FALSEevaluated 677 times by 1 test
Evaluated by:
  • Self test (438)
677-920876
413 p = pCache->pFree;-
414 pCache->pFree = p->pNext;-
415 p->pNext = 0;-
416 }else{
executed 460451 times by 435 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
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  • ...
460451
417#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT-
418 /* The group mutex must be released before pcache1Alloc() is called. This-
419 ** is because it might call sqlite3_release_memory(), which assumes that -
420 ** this mutex is not held. */-
421 assert( pcache1.separateCache==0 );-
422 assert( pCache->pGroup==&pcache1.grp );-
423 pcache1LeaveMutex(pCache->pGroup);-
424#endif-
425 if( benignMalloc ){ sqlite3BeginBenignMalloc(); }
executed 292501 times by 332 tests: end of block
Executed by:
  • Self test (100)
  • Self test (101)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
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  • ...
benignMallocDescription
TRUEevaluated 292501 times by 332 tests
Evaluated by:
  • Self test (100)
  • Self test (101)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
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  • Self test (129)
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  • Self test (131)
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  • Self test (135)
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  • Self test (139)
  • Self test (140)
  • Self test (141)
  • Self test (142)
  • Self test (143)
  • Self test (144)
  • ...
FALSEevaluated 546784 times by 4 tests
Evaluated by:
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
292501-546784
426#ifdef SQLITE_PCACHE_SEPARATE_HEADER-
427 pPg = pcache1Alloc(pCache->szPage);-
428 p = sqlite3Malloc(sizeof(PgHdr1) + pCache->szExtra);-
429 if( !pPg || !p ){-
430 pcache1Free(pPg);-
431 sqlite3_free(p);-
432 pPg = 0;-
433 }-
434#else-
435 pPg = pcache1Alloc(pCache->szAlloc);-
436 p = (PgHdr1 *)&((u8 *)pPg)[pCache->szPage];-
437#endif-
438 if( benignMalloc ){ sqlite3EndBenignMalloc(); }
executed 292501 times by 332 tests: end of block
Executed by:
  • Self test (100)
  • Self test (101)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
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  • Self test (140)
  • Self test (141)
  • Self test (142)
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  • Self test (144)
  • ...
benignMallocDescription
TRUEevaluated 292501 times by 332 tests
Evaluated by:
  • Self test (100)
  • Self test (101)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
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  • Self test (128)
  • Self test (129)
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  • Self test (131)
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  • Self test (133)
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  • Self test (135)
  • Self test (136)
  • Self test (137)
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  • Self test (139)
  • Self test (140)
  • Self test (141)
  • Self test (142)
  • Self test (143)
  • Self test (144)
  • ...
FALSEevaluated 546784 times by 4 tests
Evaluated by:
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
292501-546784
439#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT-
440 pcache1EnterMutex(pCache->pGroup);-
441#endif-
442 if( pPg==0 ) return 0;
executed 8 times by 1 test: return 0;
Executed by:
  • Self test (438)
pPg==0Description
TRUEevaluated 8 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 839277 times by 333 tests
Evaluated by:
  • Self test (100)
  • Self test (101)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
  • Self test (127)
  • Self test (128)
  • Self test (129)
  • Self test (130)
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  • Self test (134)
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  • ...
8-839277
443 p->page.pBuf = pPg;-
444 p->page.pExtra = &p[1];-
445 p->isBulkLocal = 0;-
446 p->isAnchor = 0;-
447 }
executed 839277 times by 333 tests: end of block
Executed by:
  • Self test (100)
  • Self test (101)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
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  • ...
839277
448 (*pCache->pnPurgeable)++;-
449 return p;
executed 1299728 times by 435 tests: return p;
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
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  • ...
1299728
450}-
451-
452/*-
453** Free a page object allocated by pcache1AllocPage().-
454*/-
455static void pcache1FreePage(PgHdr1 *p){-
456 PCache1 *pCache;-
457 assert( p!=0 );-
458 pCache = p->pCache;-
459 assert( sqlite3_mutex_held(p->pCache->pGroup->mutex) );-
460 if( p->isBulkLocal ){
p->isBulkLocalDescription
TRUEevaluated 453324 times by 91 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (11)
  • Self test (12)
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  • Self test (15)
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  • Self test (18)
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  • Self test (22)
  • Self test (23)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (3)
  • Self test (30)
  • ...
FALSEevaluated 795939 times by 7 tests
Evaluated by:
  • Self test (101)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
453324-795939
461 p->pNext = pCache->pFree;-
462 pCache->pFree = p;-
463 }else{
executed 453324 times by 91 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
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  • ...
453324
464 pcache1Free(p->page.pBuf);-
465#ifdef SQLITE_PCACHE_SEPARATE_HEADER-
466 sqlite3_free(p);-
467#endif-
468 }
executed 795939 times by 7 tests: end of block
Executed by:
  • Self test (101)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
795939
469 (*pCache->pnPurgeable)--;-
470}
executed 1249263 times by 91 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
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  • Self test (105)
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  • ...
1249263
471-
472/*-
473** Malloc function used by SQLite to obtain space from the buffer configured-
474** using sqlite3_config(SQLITE_CONFIG_PAGECACHE) option. If no such buffer-
475** exists, this function falls back to sqlite3Malloc().-
476*/-
477void *sqlite3PageMalloc(int sz){-
478 return pcache1Alloc(sz);
executed 916925 times by 438 tests: return pcache1Alloc(sz);
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
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  • ...
916925
479}-
480-
481/*-
482** Free an allocated buffer obtained from sqlite3PageMalloc().-
483*/-
484void sqlite3PageFree(void *p){-
485 pcache1Free(p);-
486}
executed 1017947 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • ...
1017947
487-
488-
489/*-
490** Return true if it desirable to avoid allocating a new page cache-
491** entry.-
492**-
493** If memory was allocated specifically to the page cache using-
494** SQLITE_CONFIG_PAGECACHE but that memory has all been used, then-
495** it is desirable to avoid allocating a new page cache entry because-
496** presumably SQLITE_CONFIG_PAGECACHE was suppose to be sufficient-
497** for all page cache needs and we should not need to spill the-
498** allocation onto the heap.-
499**-
500** Or, the heap is used for all page cache memory but the heap is-
501** under memory pressure, then again it is desirable to avoid-
502** allocating a new page cache entry in order to avoid stressing-
503** the heap even further.-
504*/-
505static int pcache1UnderMemoryPressure(PCache1 *pCache){-
506 if( pcache1.nSlot && (pCache->szPage+pCache->szExtra)<=pcache1.szSlot ){
(pcache1_g).nSlotDescription
TRUEevaluated 6873 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 2132251 times by 400 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
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  • Self test (106)
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  • ...
(pCache->szPag...che1_g).szSlotDescription
TRUEevaluated 6131 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 742 times by 1 test
Evaluated by:
  • Self test (438)
742-2132251
507 return pcache1.bUnderPressure;
executed 6131 times by 1 test: return (pcache1_g).bUnderPressure;
Executed by:
  • Self test (438)
6131
508 }else{-
509 return sqlite3HeapNearlyFull();
executed 2132993 times by 400 tests: return sqlite3HeapNearlyFull();
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
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  • ...
2132993
510 }-
511}-
512-
513/******************************************************************************/-
514/******** General Implementation Functions ************************************/-
515-
516/*-
517** This function is used to resize the hash table used by the cache passed-
518** as the first argument.-
519**-
520** The PCache mutex must be held when this function is called.-
521*/-
522static void pcache1ResizeHash(PCache1 *p){-
523 PgHdr1 **apNew;-
524 unsigned int nNew;-
525 unsigned int i;-
526-
527 assert( sqlite3_mutex_held(p->pGroup->mutex) );-
528-
529 nNew = p->nHash*2;-
530 if( nNew<256 ){
nNew<256Description
TRUEevaluated 96049 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
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  • Self test (11)
  • Self test (110)
  • Self test (111)
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  • Self test (113)
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  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 833 times by 14 tests
Evaluated by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
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  • Self test (98)
  • Self test (99)
833-96049
531 nNew = 256;-
532 }
executed 96049 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
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  • ...
96049
533-
534 pcache1LeaveMutex(p->pGroup);-
535 if( p->nHash ){ sqlite3BeginBenignMalloc(); }
executed 833 times by 14 tests: end of block
Executed by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
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  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
p->nHashDescription
TRUEevaluated 833 times by 14 tests
Evaluated by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
  • Self test (93)
  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
FALSEevaluated 96049 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
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  • ...
833-96049
536 apNew = (PgHdr1 **)sqlite3MallocZero(sizeof(PgHdr1 *)*nNew);-
537 if( p->nHash ){ sqlite3EndBenignMalloc(); }
executed 833 times by 14 tests: end of block
Executed by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
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  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
p->nHashDescription
TRUEevaluated 833 times by 14 tests
Evaluated by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
  • Self test (93)
  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
FALSEevaluated 96049 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
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  • Self test (120)
  • ...
833-96049
538 pcache1EnterMutex(p->pGroup);-
539 if( apNew ){
apNewDescription
TRUEevaluated 96868 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
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  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 14 times by 1 test
Evaluated by:
  • Self test (438)
14-96868
540 for(i=0; i<p->nHash; i++){
i<p->nHashDescription
TRUEevaluated 408064 times by 14 tests
Evaluated by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
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  • Self test (93)
  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
FALSEevaluated 96868 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
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  • Self test (116)
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  • Self test (118)
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  • Self test (12)
  • Self test (120)
  • ...
96868-408064
541 PgHdr1 *pPage;-
542 PgHdr1 *pNext = p->apHash[i];-
543 while( (pPage = pNext)!=0 ){
(pPage = pNext)!=0Description
TRUEevaluated 408064 times by 14 tests
Evaluated by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
  • Self test (93)
  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
FALSEevaluated 408064 times by 14 tests
Evaluated by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
  • Self test (93)
  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
408064
544 unsigned int h = pPage->iKey % nNew;-
545 pNext = pPage->pNext;-
546 pPage->pNext = apNew[h];-
547 apNew[h] = pPage;-
548 }
executed 408064 times by 14 tests: end of block
Executed by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
  • Self test (93)
  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
408064
549 }
executed 408064 times by 14 tests: end of block
Executed by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
  • Self test (93)
  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
408064
550 sqlite3_free(p->apHash);-
551 p->apHash = apNew;-
552 p->nHash = nNew;-
553 }
executed 96868 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
96868
554}
executed 96882 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
96882
555-
556/*-
557** This function is used internally to remove the page pPage from the -
558** PGroup LRU list, if is part of it. If pPage is not part of the PGroup-
559** LRU list, then this function is a no-op.-
560**-
561** The PGroup mutex must be held when this function is called.-
562*/-
563static PgHdr1 *pcache1PinPage(PgHdr1 *pPage){-
564 assert( pPage!=0 );-
565 assert( PAGE_IS_UNPINNED(pPage) );-
566 assert( pPage->pLruNext );-
567 assert( pPage->pLruPrev );-
568 assert( sqlite3_mutex_held(pPage->pCache->pGroup->mutex) );-
569 pPage->pLruPrev->pLruNext = pPage->pLruNext;-
570 pPage->pLruNext->pLruPrev = pPage->pLruPrev;-
571 pPage->pLruNext = 0;-
572 pPage->pLruPrev = 0;-
573 assert( pPage->isAnchor==0 );-
574 assert( pPage->pCache->pGroup->lru.isAnchor==1 );-
575 pPage->pCache->nRecyclable--;-
576 return pPage;
executed 11726175 times by 435 tests: return pPage;
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
11726175
577}-
578-
579-
580/*-
581** Remove the page supplied as an argument from the hash table -
582** (PCache1.apHash structure) that it is currently stored in.-
583** Also free the page if freePage is true.-
584**-
585** The PGroup mutex must be held when this function is called.-
586*/-
587static void pcache1RemoveFromHash(PgHdr1 *pPage, int freeFlag){-
588 unsigned int h;-
589 PCache1 *pCache = pPage->pCache;-
590 PgHdr1 **pp;-
591-
592 assert( sqlite3_mutex_held(pCache->pGroup->mutex) );-
593 h = pPage->iKey % pCache->nHash;-
594 for(pp=&pCache->apHash[h]; (*pp)!=pPage; pp=&(*pp)->pNext);
executed 622054 times by 3 tests: ;
Executed by:
  • Self test (438)
  • Self test (64)
  • Self test (74)
(*pp)!=pPageDescription
TRUEevaluated 622054 times by 3 tests
Evaluated by:
  • Self test (438)
  • Self test (64)
  • Self test (74)
FALSEevaluated 5806029 times by 33 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (32)
  • Self test (33)
  • Self test (39)
  • Self test (438)
  • Self test (54)
  • Self test (57)
  • Self test (58)
  • ...
622054-5806029
595 *pp = (*pp)->pNext;-
596-
597 pCache->nPage--;-
598 if( freeFlag ) pcache1FreePage(pPage);
executed 392915 times by 23 tests: pcache1FreePage(pPage);
Executed by:
  • Self test
  • Self test (10)
  • Self test (11)
  • Self test (12)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (18)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (32)
  • Self test (33)
  • Self test (39)
  • Self test (438)
  • Self test (6)
  • Self test (7)
  • Self test (79)
  • Self test (8)
  • Self test (88)
freeFlagDescription
TRUEevaluated 392915 times by 23 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (11)
  • Self test (12)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (18)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (32)
  • Self test (33)
  • Self test (39)
  • Self test (438)
  • Self test (6)
  • Self test (7)
  • Self test (79)
  • Self test (8)
  • Self test (88)
FALSEevaluated 5413114 times by 28 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (438)
  • Self test (54)
  • Self test (57)
  • Self test (58)
  • Self test (6)
  • Self test (64)
  • Self test (7)
  • ...
392915-5413114
599}
executed 5806029 times by 33 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (32)
  • Self test (33)
  • Self test (39)
  • Self test (438)
  • Self test (54)
  • Self test (57)
  • Self test (58)
  • ...
5806029
600-
601/*-
602** If there are currently more than nMaxPage pages allocated, try-
603** to recycle pages to reduce the number allocated to nMaxPage.-
604*/-
605static void pcache1EnforceMaxPage(PCache1 *pCache){-
606 PGroup *pGroup = pCache->pGroup;-
607 PgHdr1 *p;-
608 assert( sqlite3_mutex_held(pGroup->mutex) );-
609 while( pGroup->nPurgeable>pGroup->nMaxPage
pGroup->nPurge...roup->nMaxPageDescription
TRUEevaluated 12653 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 307439 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
12653-307439
610 && (p=pGroup->lru.pLruPrev)->isAnchor==0
(p=pGroup->lru...)->isAnchor==0Description
TRUEevaluated 12651 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 2 times by 1 test
Evaluated by:
  • Self test (438)
2-12651
611 ){-
612 assert( p->pCache->pGroup==pGroup );-
613 assert( PAGE_IS_UNPINNED(p) );-
614 pcache1PinPage(p);-
615 pcache1RemoveFromHash(p, 1);-
616 }
executed 12651 times by 1 test: end of block
Executed by:
  • Self test (438)
12651
617 if( pCache->nPage==0 && pCache->pBulk ){
pCache->nPage==0Description
TRUEevaluated 286768 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 20673 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
pCache->pBulkDescription
TRUEevaluated 81216 times by 64 tests
Evaluated by:
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • Self test (40)
  • Self test (41)
  • Self test (42)
  • Self test (43)
  • Self test (438)
  • Self test (44)
  • ...
FALSEevaluated 205552 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
20673-286768
618 sqlite3_free(pCache->pBulk);-
619 pCache->pBulk = pCache->pFree = 0;-
620 }
executed 81216 times by 64 tests: end of block
Executed by:
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • Self test (40)
  • Self test (41)
  • Self test (42)
  • Self test (43)
  • Self test (438)
  • Self test (44)
  • ...
81216
621}
executed 307441 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
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  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
307441
622-
623/*-
624** Discard all pages from cache pCache with a page number (key value) -
625** greater than or equal to iLimit. Any pinned pages that meet this -
626** criteria are unpinned before they are discarded.-
627**-
628** The PCache mutex must be held when this function is called.-
629*/-
630static void pcache1TruncateUnsafe(-
631 PCache1 *pCache, /* The cache to truncate */-
632 unsigned int iLimit /* Drop pages with this pgno or larger */-
633){-
634 TESTONLY( int nPage = 0; ) /* To assert pCache->nPage is correct */-
635 unsigned int h, iStop;-
636 assert( sqlite3_mutex_held(pCache->pGroup->mutex) );-
637 assert( pCache->iMaxKey >= iLimit );-
638 assert( pCache->nHash > 0 );-
639 if( pCache->iMaxKey - iLimit < pCache->nHash ){
pCache->iMaxKe... pCache->nHashDescription
TRUEevaluated 89559 times by 82 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
  • Self test (18)
  • Self test (22)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • ...
FALSEevaluated 209 times by 4 tests
Evaluated by:
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
209-89559
640 /* If we are just shaving the last few pages off the end of the-
641 ** cache, then there is no point in scanning the entire hash table.-
642 ** Only scan those hash slots that might contain pages that need to-
643 ** be removed. */-
644 h = iLimit % pCache->nHash;-
645 iStop = pCache->iMaxKey % pCache->nHash;-
646 TESTONLY( nPage = -10; ) /* Disable the pCache->nPage validity check */-
647 }else{
executed 89559 times by 82 tests: end of block
Executed by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
  • Self test (18)
  • Self test (22)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • ...
89559
648 /* This is the general case where many pages are being removed.-
649 ** It is necessary to scan the entire hash table */-
650 h = pCache->nHash/2;-
651 iStop = h - 1;-
652 }
executed 209 times by 4 tests: end of block
Executed by:
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
209
653 for(;;){-
654 PgHdr1 **pp;-
655 PgHdr1 *pPage;-
656 assert( h<pCache->nHash );-
657 pp = &pCache->apHash[h]; -
658 while( (pPage = *pp)!=0 ){
(pPage = *pp)!=0Description
TRUEevaluated 856887 times by 75 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • Self test (40)
  • Self test (41)
  • Self test (42)
  • Self test (43)
  • ...
FALSEevaluated 965397 times by 82 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
  • Self test (18)
  • Self test (22)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • ...
856887-965397
659 if( pPage->iKey>=iLimit ){
pPage->iKey>=iLimitDescription
TRUEevaluated 856348 times by 75 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • Self test (40)
  • Self test (41)
  • Self test (42)
  • Self test (43)
  • ...
FALSEevaluated 539 times by 2 tests
Evaluated by:
  • Self test (34)
  • Self test (438)
539-856348
660 pCache->nPage--;-
661 *pp = pPage->pNext;-
662 if( PAGE_IS_UNPINNED(pPage) ) pcache1PinPage(pPage);
executed 854269 times by 75 tests: pcache1PinPage(pPage);
Executed by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • Self test (40)
  • Self test (41)
  • Self test (42)
  • Self test (43)
  • ...
((pPage)->pLruNext!=0)Description
TRUEevaluated 854269 times by 75 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • Self test (40)
  • Self test (41)
  • Self test (42)
  • Self test (43)
  • ...
FALSEevaluated 2079 times by 1 test
Evaluated by:
  • Self test (438)
2079-854269
663 pcache1FreePage(pPage);-
664 }else{
executed 856348 times by 75 tests: end of block
Executed by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • Self test (40)
  • Self test (41)
  • Self test (42)
  • Self test (43)
  • ...
856348
665 pp = &pPage->pNext;-
666 TESTONLY( if( nPage>=0 ) nPage++; )-
667 }
executed 539 times by 2 tests: end of block
Executed by:
  • Self test (34)
  • Self test (438)
539
668 }-
669 if( h==iStop ) break;
executed 89768 times by 82 tests: break;
Executed by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
  • Self test (18)
  • Self test (22)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • ...
h==iStopDescription
TRUEevaluated 89768 times by 82 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
  • Self test (18)
  • Self test (22)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • ...
FALSEevaluated 875629 times by 66 tests
Evaluated by:
  • Self test (10)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
  • Self test (18)
  • Self test (22)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • Self test (40)
  • Self test (41)
  • ...
89768-875629
670 h = (h+1) % pCache->nHash;-
671 }
executed 875629 times by 66 tests: end of block
Executed by:
  • Self test (10)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
  • Self test (18)
  • Self test (22)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • Self test (40)
  • Self test (41)
  • ...
875629
672 assert( nPage<0 || pCache->nPage==(unsigned)nPage );-
673}
executed 89768 times by 82 tests: end of block
Executed by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
  • Self test (18)
  • Self test (22)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • ...
89768
674-
675/******************************************************************************/-
676/******** sqlite3_pcache Methods **********************************************/-
677-
678/*-
679** Implementation of the sqlite3_pcache.xInit method.-
680*/-
681static int pcache1Init(void *NotUsed){-
682 UNUSED_PARAMETER(NotUsed);-
683 assert( pcache1.isInit==0 );-
684 memset(&pcache1, 0, sizeof(pcache1));-
685-
686-
687 /*-
688 ** The pcache1.separateCache variable is true if each PCache has its own-
689 ** private PGroup (mode-1). pcache1.separateCache is false if the single-
690 ** PGroup in pcache1.grp is used for all page caches (mode-2).-
691 **-
692 ** * Always use a unified cache (mode-2) if ENABLE_MEMORY_MANAGEMENT-
693 **-
694 ** * Use a unified cache in single-threaded applications that have-
695 ** configured a start-time buffer for use as page-cache memory using-
696 ** sqlite3_config(SQLITE_CONFIG_PAGECACHE, pBuf, sz, N) with non-NULL -
697 ** pBuf argument.-
698 **-
699 ** * Otherwise use separate caches (mode-1)-
700 */-
701#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT)-
702 pcache1.separateCache = 0;-
703#elif SQLITE_THREADSAFE-
704 pcache1.separateCache = sqlite3GlobalConfig.pPage==0
sqlite3Config.pPage==0Description
TRUEevaluated 523 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 6 times by 1 test
Evaluated by:
  • Self test (438)
6-523
705 || sqlite3GlobalConfig.bCoreMutex>0;
sqlite3Config.bCoreMutex>0Description
TRUEevaluated 2 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 4 times by 1 test
Evaluated by:
  • Self test (438)
2-4
706#else-
707 pcache1.separateCache = sqlite3GlobalConfig.pPage==0;-
708#endif-
709-
710#if SQLITE_THREADSAFE-
711 if( sqlite3GlobalConfig.bCoreMutex ){
sqlite3Config.bCoreMutexDescription
TRUEevaluated 521 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 8 times by 1 test
Evaluated by:
  • Self test (438)
8-521
712 pcache1.grp.mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_LRU);-
713 pcache1.mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_PMEM);-
714 }
executed 521 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
521
715#endif-
716 if( pcache1.separateCache
(pcache1_g).separateCacheDescription
TRUEevaluated 525 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 4 times by 1 test
Evaluated by:
  • Self test (438)
4-525
717 && sqlite3GlobalConfig.nPage!=0
sqlite3Config.nPage!=0Description
TRUEevaluated 514 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 11 times by 1 test
Evaluated by:
  • Self test (438)
11-514
718 && sqlite3GlobalConfig.pPage==0
sqlite3Config.pPage==0Description
TRUEevaluated 512 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 2 times by 1 test
Evaluated by:
  • Self test (438)
2-512
719 ){-
720 pcache1.nInitPage = sqlite3GlobalConfig.nPage;-
721 }else{
executed 512 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
512
722 pcache1.nInitPage = 0;-
723 }
executed 17 times by 1 test: end of block
Executed by:
  • Self test (438)
17
724 pcache1.grp.mxPinned = 10;-
725 pcache1.isInit = 1;-
726 return SQLITE_OK;
executed 529 times by 438 tests: return 0;
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
529
727}-
728-
729/*-
730** Implementation of the sqlite3_pcache.xShutdown method.-
731** Note that the static mutex allocated in xInit does -
732** not need to be freed.-
733*/-
734static void pcache1Shutdown(void *NotUsed){-
735 UNUSED_PARAMETER(NotUsed);-
736 assert( pcache1.isInit!=0 );-
737 memset(&pcache1, 0, sizeof(pcache1));-
738}
executed 92 times by 6 tests: end of block
Executed by:
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (438)
92
739-
740/* forward declaration */-
741static void pcache1Destroy(sqlite3_pcache *p);-
742-
743/*-
744** Implementation of the sqlite3_pcache.xCreate method.-
745**-
746** Allocate a new cache.-
747*/-
748static sqlite3_pcache *pcache1Create(int szPage, int szExtra, int bPurgeable){-
749 PCache1 *pCache; /* The newly created page cache */-
750 PGroup *pGroup; /* The group the new page cache will belong to */-
751 int sz; /* Bytes of memory required to allocate the new cache */-
752-
753 assert( (szPage & (szPage-1))==0 && szPage>=512 && szPage<=65536 );-
754 assert( szExtra < 300 );-
755-
756 sz = sizeof(PCache1) + sizeof(PGroup)*pcache1.separateCache;-
757 pCache = (PCache1 *)sqlite3MallocZero(sz);-
758 if( pCache ){
pCacheDescription
TRUEevaluated 96049 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 14 times by 1 test
Evaluated by:
  • Self test (438)
14-96049
759 if( pcache1.separateCache ){
(pcache1_g).separateCacheDescription
TRUEevaluated 96039 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 10 times by 1 test
Evaluated by:
  • Self test (438)
10-96039
760 pGroup = (PGroup*)&pCache[1];-
761 pGroup->mxPinned = 10;-
762 }else{
executed 96039 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
96039
763 pGroup = &pcache1.grp;-
764 }
executed 10 times by 1 test: end of block
Executed by:
  • Self test (438)
10
765 if( pGroup->lru.isAnchor==0 ){
pGroup->lru.isAnchor==0Description
TRUEevaluated 96043 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 6 times by 1 test
Evaluated by:
  • Self test (438)
6-96043
766 pGroup->lru.isAnchor = 1;-
767 pGroup->lru.pLruPrev = pGroup->lru.pLruNext = &pGroup->lru;-
768 }
executed 96043 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
96043
769 pCache->pGroup = pGroup;-
770 pCache->szPage = szPage;-
771 pCache->szExtra = szExtra;-
772 pCache->szAlloc = szPage + szExtra + ROUND8(sizeof(PgHdr1));-
773 pCache->bPurgeable = (bPurgeable ? 1 : 0);
bPurgeableDescription
TRUEevaluated 95748 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 301 times by 1 test
Evaluated by:
  • Self test (438)
301-95748
774 pcache1EnterMutex(pGroup);-
775 pcache1ResizeHash(pCache);-
776 if( bPurgeable ){
bPurgeableDescription
TRUEevaluated 95748 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 301 times by 1 test
Evaluated by:
  • Self test (438)
301-95748
777 pCache->nMin = 10;-
778 pGroup->nMinPage += pCache->nMin;-
779 pGroup->mxPinned = pGroup->nMaxPage + 10 - pGroup->nMinPage;-
780 pCache->pnPurgeable = &pGroup->nPurgeable;-
781 }else{
executed 95748 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
95748
782 static unsigned int dummyCurrentPage;-
783 pCache->pnPurgeable = &dummyCurrentPage;-
784 }
executed 301 times by 1 test: end of block
Executed by:
  • Self test (438)
301
785 pcache1LeaveMutex(pGroup);-
786 if( pCache->nHash==0 ){
pCache->nHash==0Description
TRUEevaluated 14 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 96035 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
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  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
14-96035
787 pcache1Destroy((sqlite3_pcache*)pCache);-
788 pCache = 0;-
789 }
executed 14 times by 1 test: end of block
Executed by:
  • Self test (438)
14
790 }
executed 96049 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
96049
791 return (sqlite3_pcache *)pCache;
executed 96063 times by 438 tests: return (sqlite3_pcache *)pCache;
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
96063
792}-
793-
794/*-
795** Implementation of the sqlite3_pcache.xCachesize method. -
796**-
797** Configure the cache_size limit for a cache.-
798*/-
799static void pcache1Cachesize(sqlite3_pcache *p, int nMax){-
800 PCache1 *pCache = (PCache1 *)p;-
801 if( pCache->bPurgeable ){
pCache->bPurgeableDescription
TRUEevaluated 211761 times by 438 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
FALSEevaluated 756 times by 1 test
Evaluated by:
  • Self test (438)
756-211761
802 PGroup *pGroup = pCache->pGroup;-
803 pcache1EnterMutex(pGroup);-
804 pGroup->nMaxPage += (nMax - pCache->nMax);-
805 pGroup->mxPinned = pGroup->nMaxPage + 10 - pGroup->nMinPage;-
806 pCache->nMax = nMax;-
807 pCache->n90pct = pCache->nMax*9/10;-
808 pcache1EnforceMaxPage(pCache);-
809 pcache1LeaveMutex(pGroup);-
810 }
executed 211761 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
211761
811}
executed 212517 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • ...
212517
812-
813/*-
814** Implementation of the sqlite3_pcache.xShrink method. -
815**-
816** Free up as much memory as possible.-
817*/-
818static void pcache1Shrink(sqlite3_pcache *p){-
819 PCache1 *pCache = (PCache1*)p;-
820 if( pCache->bPurgeable ){
pCache->bPurgeableDescription
TRUEevaluated 6 times by 1 test
Evaluated by:
  • Self test (438)
FALSEnever evaluated
0-6
821 PGroup *pGroup = pCache->pGroup;-
822 int savedMaxPage;-
823 pcache1EnterMutex(pGroup);-
824 savedMaxPage = pGroup->nMaxPage;-
825 pGroup->nMaxPage = 0;-
826 pcache1EnforceMaxPage(pCache);-
827 pGroup->nMaxPage = savedMaxPage;-
828 pcache1LeaveMutex(pGroup);-
829 }
executed 6 times by 1 test: end of block
Executed by:
  • Self test (438)
6
830}
executed 6 times by 1 test: end of block
Executed by:
  • Self test (438)
6
831-
832/*-
833** Implementation of the sqlite3_pcache.xPagecount method. -
834*/-
835static int pcache1Pagecount(sqlite3_pcache *p){-
836 int n;-
837 PCache1 *pCache = (PCache1*)p;-
838 pcache1EnterMutex(pCache->pGroup);-
839 n = pCache->nPage;-
840 pcache1LeaveMutex(pCache->pGroup);-
841 return n;
executed 1489785 times by 27 tests: return n;
Executed by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (438)
  • Self test (54)
  • Self test (57)
  • Self test (58)
  • Self test (6)
  • Self test (64)
  • Self test (7)
  • ...
1489785
842}-
843-
844-
845/*-
846** Implement steps 3, 4, and 5 of the pcache1Fetch() algorithm described-
847** in the header of the pcache1Fetch() procedure.-
848**-
849** This steps are broken out into a separate procedure because they are-
850** usually not needed, and by avoiding the stack initialization required-
851** for these steps, the main pcache1Fetch() procedure can run faster.-
852*/-
853static SQLITE_NOINLINE PgHdr1 *pcache1FetchStage2(-
854 PCache1 *pCache, -
855 unsigned int iKey, -
856 int createFlag-
857){-
858 unsigned int nPinned;-
859 PGroup *pGroup = pCache->pGroup;-
860 PgHdr1 *pPage = 0;-
861-
862 /* Step 3: Abort if createFlag is 1 but the cache is nearly full */-
863 assert( pCache->nPage >= pCache->nRecyclable );-
864 nPinned = pCache->nPage - pCache->nRecyclable;-
865 assert( pGroup->mxPinned == pGroup->nMaxPage + 10 - pGroup->nMinPage );-
866 assert( pCache->n90pct == pCache->nMax*9/10 );-
867 if( createFlag==1 && (
createFlag==1Description
TRUEevaluated 3055748 times by 372 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
  • Self test (11)
  • Self test (12)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
  • Self test (127)
  • Self test (128)
  • Self test (129)
  • Self test (13)
  • Self test (130)
  • Self test (131)
  • Self test (132)
  • Self test (133)
  • Self test (134)
  • Self test (135)
  • Self test (136)
  • Self test (137)
  • Self test (138)
  • ...
FALSEevaluated 5146816 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
3055748-5146816
868 nPinned>=pGroup->mxPinned
nPinned>=pGroup->mxPinnedDescription
TRUEevaluated 262675 times by 21 tests
Evaluated by:
  • Self test (10)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (438)
  • Self test (54)
  • Self test (6)
  • Self test (7)
  • Self test (8)
FALSEevaluated 2793073 times by 372 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
  • Self test (11)
  • Self test (12)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
  • Self test (127)
  • Self test (128)
  • Self test (129)
  • Self test (13)
  • Self test (130)
  • Self test (131)
  • Self test (132)
  • Self test (133)
  • Self test (134)
  • Self test (135)
  • Self test (136)
  • Self test (137)
  • Self test (138)
  • ...
262675-2793073
869 || nPinned>=pCache->n90pct
nPinned>=pCache->n90pctDescription
TRUEevaluated 1225947 times by 27 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (438)
  • Self test (54)
  • Self test (57)
  • Self test (58)
  • Self test (6)
  • Self test (64)
  • Self test (7)
  • ...
FALSEevaluated 1567126 times by 372 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
  • Self test (11)
  • Self test (12)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
  • Self test (127)
  • Self test (128)
  • Self test (129)
  • Self test (13)
  • Self test (130)
  • Self test (131)
  • Self test (132)
  • Self test (133)
  • Self test (134)
  • Self test (135)
  • Self test (136)
  • Self test (137)
  • Self test (138)
  • ...
1225947-1567126
870 || (pcache1UnderMemoryPressure(pCache) && pCache->nRecyclable<nPinned)
pcache1UnderMe...essure(pCache)Description
TRUEevaluated 1825 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 1565301 times by 372 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (104)
  • Self test (11)
  • Self test (12)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • Self test (125)
  • Self test (126)
  • Self test (127)
  • Self test (128)
  • Self test (129)
  • Self test (13)
  • Self test (130)
  • Self test (131)
  • Self test (132)
  • Self test (133)
  • Self test (134)
  • Self test (135)
  • Self test (136)
  • Self test (137)
  • Self test (138)
  • ...
pCache->nRecyclable<nPinnedDescription
TRUEevaluated 1092 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 733 times by 1 test
Evaluated by:
  • Self test (438)
733-1565301
871 )){-
872 return 0;
executed 1489714 times by 27 tests: return 0;
Executed by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (438)
  • Self test (54)
  • Self test (57)
  • Self test (58)
  • Self test (6)
  • Self test (64)
  • Self test (7)
  • ...
1489714
873 }-
874-
875 if( pCache->nPage>=pCache->nHash ) pcache1ResizeHash(pCache);
executed 833 times by 14 tests: pcache1ResizeHash(pCache);
Executed by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
  • Self test (93)
  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
pCache->nPage>=pCache->nHashDescription
TRUEevaluated 833 times by 14 tests
Evaluated by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
  • Self test (91)
  • Self test (92)
  • Self test (93)
  • Self test (94)
  • Self test (95)
  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
FALSEevaluated 6712017 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
833-6712017
876 assert( pCache->nHash>0 && pCache->apHash );-
877-
878 /* Step 4. Try to recycle a page. */-
879 if( pCache->bPurgeable
pCache->bPurgeableDescription
TRUEevaluated 6710789 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
FALSEevaluated 2061 times by 1 test
Evaluated by:
  • Self test (438)
2061-6710789
880 && !pGroup->lru.pLruPrev->isAnchor
!pGroup->lru.p...Prev->isAnchorDescription
TRUEevaluated 5981047 times by 377 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (104)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • ...
FALSEevaluated 729742 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
729742-5981047
881 && ((pCache->nPage+1>=pCache->nMax) || pcache1UnderMemoryPressure(pCache))
(pCache->nPage...=pCache->nMax)Description
TRUEevaluated 5409049 times by 28 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (438)
  • Self test (54)
  • Self test (57)
  • Self test (58)
  • Self test (6)
  • Self test (64)
  • Self test (7)
  • ...
FALSEevaluated 571998 times by 377 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (104)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • ...
pcache1UnderMe...essure(pCache)Description
TRUEevaluated 4065 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 567933 times by 377 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (104)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
  • Self test (112)
  • Self test (113)
  • Self test (114)
  • Self test (115)
  • Self test (116)
  • Self test (117)
  • Self test (118)
  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • Self test (122)
  • Self test (123)
  • Self test (124)
  • ...
4065-5409049
882 ){-
883 PCache1 *pOther;-
884 pPage = pGroup->lru.pLruPrev;-
885 assert( PAGE_IS_UNPINNED(pPage) );-
886 pcache1RemoveFromHash(pPage, 0);-
887 pcache1PinPage(pPage);-
888 pOther = pPage->pCache;-
889 if( pOther->szAlloc != pCache->szAlloc ){
pOther->szAllo...Cache->szAllocDescription
TRUEnever evaluated
FALSEevaluated 5413114 times by 28 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (438)
  • Self test (54)
  • Self test (57)
  • Self test (58)
  • Self test (6)
  • Self test (64)
  • Self test (7)
  • ...
0-5413114
890 pcache1FreePage(pPage);-
891 pPage = 0;-
892 }else{
never executed: end of block
0
893 pGroup->nPurgeable -= (pOther->bPurgeable - pCache->bPurgeable);-
894 }
executed 5413114 times by 28 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (438)
  • Self test (54)
  • Self test (57)
  • Self test (58)
  • Self test (6)
  • Self test (64)
  • Self test (7)
  • ...
5413114
895 }-
896-
897 /* Step 5. If a usable page buffer has still not been found, -
898 ** attempt to allocate a new one. -
899 */-
900 if( !pPage ){
!pPageDescription
TRUEevaluated 1299736 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
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  • ...
FALSEevaluated 5413114 times by 28 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (11)
  • Self test (12)
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  • ...
1299736-5413114
901 pPage = pcache1AllocPage(pCache, createFlag==1);-
902 }
executed 1299736 times by 435 tests: end of block
Executed by:
  • Self test
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  • Self test (100)
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  • Self test (103)
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  • ...
1299736
903-
904 if( pPage ){
pPageDescription
TRUEevaluated 6712842 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
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  • Self test (119)
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  • Self test (121)
  • ...
FALSEevaluated 8 times by 1 test
Evaluated by:
  • Self test (438)
8-6712842
905 unsigned int h = iKey % pCache->nHash;-
906 pCache->nPage++;-
907 pPage->iKey = iKey;-
908 pPage->pNext = pCache->apHash[h];-
909 pPage->pCache = pCache;-
910 pPage->pLruPrev = 0;-
911 pPage->pLruNext = 0;-
912 *(void **)pPage->page.pExtra = 0;-
913 pCache->apHash[h] = pPage;-
914 if( iKey>pCache->iMaxKey ){
iKey>pCache->iMaxKeyDescription
TRUEevaluated 1126130 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
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  • Self test (119)
  • Self test (12)
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  • Self test (121)
  • ...
FALSEevaluated 5586712 times by 376 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (101)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
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  • Self test (122)
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  • ...
1126130-5586712
915 pCache->iMaxKey = iKey;-
916 }
executed 1126130 times by 435 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
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  • ...
1126130
917 }
executed 6712842 times by 435 tests: end of block
Executed by:
  • Self test
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  • Self test (100)
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  • Self test (103)
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  • Self test (121)
  • ...
6712842
918 return pPage;
executed 6712850 times by 435 tests: return pPage;
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
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  • ...
6712850
919}-
920-
921/*-
922** Implementation of the sqlite3_pcache.xFetch method. -
923**-
924** Fetch a page by key value.-
925**-
926** Whether or not a new page may be allocated by this function depends on-
927** the value of the createFlag argument. 0 means do not allocate a new-
928** page. 1 means allocate a new page if space is easily available. 2 -
929** means to try really hard to allocate a new page.-
930**-
931** For a non-purgeable cache (a cache used as the storage for an in-memory-
932** database) there is really no difference between createFlag 1 and 2. So-
933** the calling function (pcache.c) will never have a createFlag of 1 on-
934** a non-purgeable cache.-
935**-
936** There are three different approaches to obtaining space for a page,-
937** depending on the value of parameter createFlag (which may be 0, 1 or 2).-
938**-
939** 1. Regardless of the value of createFlag, the cache is searched for a -
940** copy of the requested page. If one is found, it is returned.-
941**-
942** 2. If createFlag==0 and the page is not already in the cache, NULL is-
943** returned.-
944**-
945** 3. If createFlag is 1, and the page is not already in the cache, then-
946** return NULL (do not allocate a new page) if any of the following-
947** conditions are true:-
948**-
949** (a) the number of pages pinned by the cache is greater than-
950** PCache1.nMax, or-
951**-
952** (b) the number of pages pinned by the cache is greater than-
953** the sum of nMax for all purgeable caches, less the sum of -
954** nMin for all other purgeable caches, or-
955**-
956** 4. If none of the first three conditions apply and the cache is marked-
957** as purgeable, and if one of the following is true:-
958**-
959** (a) The number of pages allocated for the cache is already -
960** PCache1.nMax, or-
961**-
962** (b) The number of pages allocated for all purgeable caches is-
963** already equal to or greater than the sum of nMax for all-
964** purgeable caches,-
965**-
966** (c) The system is under memory pressure and wants to avoid-
967** unnecessary pages cache entry allocations-
968**-
969** then attempt to recycle a page from the LRU list. If it is the right-
970** size, return the recycled buffer. Otherwise, free the buffer and-
971** proceed to step 5. -
972**-
973** 5. Otherwise, allocate and return a new page buffer.-
974**-
975** There are two versions of this routine. pcache1FetchWithMutex() is-
976** the general case. pcache1FetchNoMutex() is a faster implementation for-
977** the common case where pGroup->mutex is NULL. The pcache1Fetch() wrapper-
978** invokes the appropriate routine.-
979*/-
980static PgHdr1 *pcache1FetchNoMutex(-
981 sqlite3_pcache *p, -
982 unsigned int iKey, -
983 int createFlag-
984){-
985 PCache1 *pCache = (PCache1 *)p;-
986 PgHdr1 *pPage = 0;-
987-
988 /* Step 1: Search the hash table for an existing entry. */-
989 pPage = pCache->apHash[iKey % pCache->nHash];-
990 while( pPage && pPage->iKey!=iKey ){ pPage = pPage->pNext; }
executed 2565882 times by 14 tests: end of block
Executed by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
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pPageDescription
TRUEevaluated 19327234 times by 434 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • ...
FALSEevaluated 8344943 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • Self test (103)
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  • ...
pPage->iKey!=iKeyDescription
TRUEevaluated 2565882 times by 14 tests
Evaluated by:
  • Self test (100)
  • Self test (34)
  • Self test (438)
  • Self test (64)
  • Self test (74)
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  • Self test (96)
  • Self test (97)
  • Self test (98)
  • Self test (99)
FALSEevaluated 16761352 times by 434 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • ...
2565882-19327234
991-
992 /* Step 2: If the page was found in the hash table, then return it.-
993 ** If the page was not in the hash table and createFlag is 0, abort.-
994 ** Otherwise (page not in hash and createFlag!=0) continue with-
995 ** subsequent steps to try to create the page. */-
996 if( pPage ){
pPageDescription
TRUEevaluated 16761352 times by 434 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • ...
FALSEevaluated 8344943 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • Self test (103)
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  • ...
8344943-16761352
997 if( PAGE_IS_UNPINNED(pPage) ){
((pPage)->pLruNext!=0)Description
TRUEevaluated 5446141 times by 430 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • Self test (103)
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  • ...
FALSEevaluated 11315211 times by 434 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • Self test (103)
  • Self test (104)
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  • ...
5446141-11315211
998 return pcache1PinPage(pPage);
executed 5446141 times by 430 tests: return pcache1PinPage(pPage);
Executed by:
  • Self test
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  • Self test (100)
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  • ...
5446141
999 }else{-
1000 return pPage;
executed 11315211 times by 434 tests: return pPage;
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
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  • ...
11315211
1001 }-
1002 }else if( createFlag ){
createFlagDescription
TRUEevaluated 8202564 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
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  • Self test (121)
  • ...
FALSEevaluated 142379 times by 17 tests
Evaluated by:
  • Self test (10)
  • Self test (11)
  • Self test (12)
  • Self test (14)
  • Self test (16)
  • Self test (18)
  • Self test (20)
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  • Self test (438)
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  • Self test (9)
142379-8202564
1003 /* Steps 3, 4, and 5 implemented by this subroutine */-
1004 return pcache1FetchStage2(pCache, iKey, createFlag);
executed 8202564 times by 435 tests: return pcache1FetchStage2(pCache, iKey, createFlag);
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
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  • ...
8202564
1005 }else{-
1006 return 0;
executed 142379 times by 17 tests: return 0;
Executed by:
  • Self test (10)
  • Self test (11)
  • Self test (12)
  • Self test (14)
  • Self test (16)
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  • Self test (438)
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  • Self test (9)
142379
1007 }-
1008}-
1009#if PCACHE1_MIGHT_USE_GROUP_MUTEX-
1010static PgHdr1 *pcache1FetchWithMutex(-
1011 sqlite3_pcache *p, -
1012 unsigned int iKey, -
1013 int createFlag-
1014){-
1015 PCache1 *pCache = (PCache1 *)p;-
1016 PgHdr1 *pPage;-
1017-
1018 pcache1EnterMutex(pCache->pGroup);-
1019 pPage = pcache1FetchNoMutex(p, iKey, createFlag);-
1020 assert( pPage==0 || pCache->iMaxKey>=iKey );-
1021 pcache1LeaveMutex(pCache->pGroup);-
1022 return pPage;-
1023}-
1024#endif-
1025static sqlite3_pcache_page *pcache1Fetch(-
1026 sqlite3_pcache *p, -
1027 unsigned int iKey, -
1028 int createFlag-
1029){-
1030#if PCACHE1_MIGHT_USE_GROUP_MUTEX || defined(SQLITE_DEBUG)-
1031 PCache1 *pCache = (PCache1 *)p;-
1032#endif-
1033-
1034 assert( offsetof(PgHdr1,page)==0 );-
1035 assert( pCache->bPurgeable || createFlag!=1 );-
1036 assert( pCache->bPurgeable || pCache->nMin==0 );-
1037 assert( pCache->bPurgeable==0 || pCache->nMin==10 );-
1038 assert( pCache->nMin==0 || pCache->bPurgeable );-
1039 assert( pCache->nHash>0 );-
1040#if PCACHE1_MIGHT_USE_GROUP_MUTEX-
1041 if( pCache->pGroup->mutex ){-
1042 return (sqlite3_pcache_page*)pcache1FetchWithMutex(p, iKey, createFlag);-
1043 }else-
1044#endif-
1045 {-
1046 return (sqlite3_pcache_page*)pcache1FetchNoMutex(p, iKey, createFlag);
executed 25106295 times by 435 tests: return (sqlite3_pcache_page*)pcache1FetchNoMutex(p, iKey, createFlag);
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
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  • ...
25106295
1047 }-
1048}-
1049-
1050-
1051/*-
1052** Implementation of the sqlite3_pcache.xUnpin method.-
1053**-
1054** Mark a page as unpinned (eligible for asynchronous recycling).-
1055*/-
1056static void pcache1Unpin(-
1057 sqlite3_pcache *p, -
1058 sqlite3_pcache_page *pPg, -
1059 int reuseUnlikely-
1060){-
1061 PCache1 *pCache = (PCache1 *)p;-
1062 PgHdr1 *pPage = (PgHdr1 *)pPg;-
1063 PGroup *pGroup = pCache->pGroup;-
1064 -
1065 assert( pPage->pCache==pCache );-
1066 pcache1EnterMutex(pGroup);-
1067-
1068 /* It is an error to call this function if the page is already -
1069 ** part of the PGroup LRU list.-
1070 */-
1071 assert( pPage->pLruPrev==0 && pPage->pLruNext==0 );-
1072 assert( PAGE_IS_PINNED(pPage) );-
1073-
1074 if( reuseUnlikely || pGroup->nPurgeable>pGroup->nMaxPage ){
reuseUnlikelyDescription
TRUEevaluated 4611 times by 7 tests
Evaluated by:
  • Self test
  • Self test (32)
  • Self test (33)
  • Self test (39)
  • Self test (438)
  • Self test (79)
  • Self test (88)
FALSEevaluated 12134226 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
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  • Self test (119)
  • Self test (12)
  • Self test (120)
  • Self test (121)
  • ...
pGroup->nPurge...roup->nMaxPageDescription
TRUEevaluated 375653 times by 17 tests
Evaluated by:
  • Self test (10)
  • Self test (11)
  • Self test (12)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (18)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (438)
  • Self test (6)
  • Self test (7)
  • Self test (8)
FALSEevaluated 11758573 times by 435 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (106)
  • Self test (107)
  • Self test (108)
  • Self test (109)
  • Self test (11)
  • Self test (110)
  • Self test (111)
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  • ...
4611-12134226
1075 pcache1RemoveFromHash(pPage, 1);-
1076 }else{
executed 380264 times by 23 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (11)
  • Self test (12)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (18)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (3)
  • Self test (32)
  • Self test (33)
  • Self test (39)
  • Self test (438)
  • Self test (6)
  • Self test (7)
  • Self test (79)
  • Self test (8)
  • Self test (88)
380264
1077 /* Add the page to the PGroup LRU list. */-
1078 PgHdr1 **ppFirst = &pGroup->lru.pLruNext;-
1079 pPage->pLruPrev = &pGroup->lru;-
1080 (pPage->pLruNext = *ppFirst)->pLruPrev = pPage;-
1081 *ppFirst = pPage;-
1082 pCache->nRecyclable++;-
1083 }
executed 11758573 times by 435 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
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  • Self test (109)
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  • Self test (119)
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  • ...
11758573
1084-
1085 pcache1LeaveMutex(pCache->pGroup);-
1086}
executed 12138837 times by 435 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
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  • ...
12138837
1087-
1088/*-
1089** Implementation of the sqlite3_pcache.xRekey method. -
1090*/-
1091static void pcache1Rekey(-
1092 sqlite3_pcache *p,-
1093 sqlite3_pcache_page *pPg,-
1094 unsigned int iOld,-
1095 unsigned int iNew-
1096){-
1097 PCache1 *pCache = (PCache1 *)p;-
1098 PgHdr1 *pPage = (PgHdr1 *)pPg;-
1099 PgHdr1 **pp;-
1100 unsigned int h; -
1101 assert( pPage->iKey==iOld );-
1102 assert( pPage->pCache==pCache );-
1103-
1104 pcache1EnterMutex(pCache->pGroup);-
1105-
1106 h = iOld%pCache->nHash;-
1107 pp = &pCache->apHash[h];-
1108 while( (*pp)!=pPage ){
(*pp)!=pPageDescription
TRUEevaluated 4515 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 351186 times by 152 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (12)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (18)
  • Self test (20)
  • Self test (22)
  • Self test (302)
  • Self test (303)
  • Self test (304)
  • Self test (305)
  • Self test (306)
  • Self test (307)
  • Self test (308)
  • Self test (309)
  • Self test (310)
  • Self test (311)
  • Self test (312)
  • Self test (313)
  • Self test (314)
  • Self test (315)
  • Self test (316)
  • Self test (317)
  • ...
4515-351186
1109 pp = &(*pp)->pNext;-
1110 }
executed 4515 times by 1 test: end of block
Executed by:
  • Self test (438)
4515
1111 *pp = pPage->pNext;-
1112-
1113 h = iNew%pCache->nHash;-
1114 pPage->iKey = iNew;-
1115 pPage->pNext = pCache->apHash[h];-
1116 pCache->apHash[h] = pPage;-
1117 if( iNew>pCache->iMaxKey ){
iNew>pCache->iMaxKeyDescription
TRUEevaluated 41435 times by 151 tests
Evaluated by:
  • Self test (10)
  • Self test (12)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (18)
  • Self test (20)
  • Self test (22)
  • Self test (302)
  • Self test (303)
  • Self test (304)
  • Self test (305)
  • Self test (306)
  • Self test (307)
  • Self test (308)
  • Self test (309)
  • Self test (310)
  • Self test (311)
  • Self test (312)
  • Self test (313)
  • Self test (314)
  • Self test (315)
  • Self test (316)
  • Self test (317)
  • Self test (318)
  • ...
FALSEevaluated 309751 times by 152 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (12)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (18)
  • Self test (20)
  • Self test (22)
  • Self test (302)
  • Self test (303)
  • Self test (304)
  • Self test (305)
  • Self test (306)
  • Self test (307)
  • Self test (308)
  • Self test (309)
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  • Self test (311)
  • Self test (312)
  • Self test (313)
  • Self test (314)
  • Self test (315)
  • Self test (316)
  • Self test (317)
  • ...
41435-309751
1118 pCache->iMaxKey = iNew;-
1119 }
executed 41435 times by 151 tests: end of block
Executed by:
  • Self test (10)
  • Self test (12)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (18)
  • Self test (20)
  • Self test (22)
  • Self test (302)
  • Self test (303)
  • Self test (304)
  • Self test (305)
  • Self test (306)
  • Self test (307)
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  • Self test (316)
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  • Self test (318)
  • ...
41435
1120-
1121 pcache1LeaveMutex(pCache->pGroup);-
1122}
executed 351186 times by 152 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (12)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (18)
  • Self test (20)
  • Self test (22)
  • Self test (302)
  • Self test (303)
  • Self test (304)
  • Self test (305)
  • Self test (306)
  • Self test (307)
  • Self test (308)
  • Self test (309)
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  • ...
351186
1123-
1124/*-
1125** Implementation of the sqlite3_pcache.xTruncate method. -
1126**-
1127** Discard all unpinned pages in the cache with a page number equal to-
1128** or greater than parameter iLimit. Any pinned pages with a page number-
1129** equal to or greater than iLimit are implicitly unpinned.-
1130*/-
1131static void pcache1Truncate(sqlite3_pcache *p, unsigned int iLimit){-
1132 PCache1 *pCache = (PCache1 *)p;-
1133 pcache1EnterMutex(pCache->pGroup);-
1134 if( iLimit<=pCache->iMaxKey ){
iLimit<=pCache->iMaxKeyDescription
TRUEevaluated 89750 times by 82 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
  • Self test (18)
  • Self test (22)
  • Self test (24)
  • Self test (26)
  • Self test (27)
  • Self test (28)
  • Self test (29)
  • Self test (30)
  • Self test (31)
  • Self test (32)
  • Self test (33)
  • Self test (34)
  • Self test (35)
  • Self test (36)
  • Self test (37)
  • Self test (38)
  • Self test (39)
  • ...
FALSEevaluated 236174 times by 98 tests
Evaluated by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (11)
  • Self test (12)
  • Self test (13)
  • Self test (14)
  • Self test (15)
  • Self test (16)
  • Self test (17)
  • Self test (18)
  • Self test (19)
  • Self test (2)
  • Self test (20)
  • Self test (21)
  • Self test (22)
  • Self test (23)
  • Self test (24)
  • Self test (25)
  • Self test (26)
  • ...
89750-236174
1135 pcache1TruncateUnsafe(pCache, iLimit);-
1136 pCache->iMaxKey = iLimit-1;-
1137 }
executed 89750 times by 82 tests: end of block
Executed by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (14)
  • Self test (15)
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  • Self test (22)
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  • Self test (37)
  • Self test (38)
  • Self test (39)
  • ...
89750
1138 pcache1LeaveMutex(pCache->pGroup);-
1139}
executed 325924 times by 105 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (11)
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  • Self test (23)
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  • ...
325924
1140-
1141/*-
1142** Implementation of the sqlite3_pcache.xDestroy method. -
1143**-
1144** Destroy a cache allocated using pcache1Create().-
1145*/-
1146static void pcache1Destroy(sqlite3_pcache *p){-
1147 PCache1 *pCache = (PCache1 *)p;-
1148 PGroup *pGroup = pCache->pGroup;-
1149 assert( pCache->bPurgeable || (pCache->nMax==0 && pCache->nMin==0) );-
1150 pcache1EnterMutex(pGroup);-
1151 if( pCache->nPage ) pcache1TruncateUnsafe(pCache, 0);
executed 18 times by 1 test: pcache1TruncateUnsafe(pCache, 0);
Executed by:
  • Self test (438)
pCache->nPageDescription
TRUEevaluated 18 times by 1 test
Evaluated by:
  • Self test (438)
FALSEevaluated 95656 times by 99 tests
Evaluated by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (11)
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  • Self test (24)
  • Self test (25)
  • Self test (26)
  • Self test (27)
  • ...
18-95656
1152 assert( pGroup->nMaxPage >= pCache->nMax );-
1153 pGroup->nMaxPage -= pCache->nMax;-
1154 assert( pGroup->nMinPage >= pCache->nMin );-
1155 pGroup->nMinPage -= pCache->nMin;-
1156 pGroup->mxPinned = pGroup->nMaxPage + 10 - pGroup->nMinPage;-
1157 pcache1EnforceMaxPage(pCache);-
1158 pcache1LeaveMutex(pGroup);-
1159 sqlite3_free(pCache->pBulk);-
1160 sqlite3_free(pCache->apHash);-
1161 sqlite3_free(pCache);-
1162}
executed 95674 times by 99 tests: end of block
Executed by:
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
  • Self test (105)
  • Self test (11)
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  • Self test (13)
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  • ...
95674
1163-
1164/*-
1165** This function is called during initialization (sqlite3_initialize()) to-
1166** install the default pluggable cache module, assuming the user has not-
1167** already provided an alternative.-
1168*/-
1169void sqlite3PCacheSetDefault(void){-
1170 static const sqlite3_pcache_methods2 defaultMethods = {-
1171 1, /* iVersion */-
1172 0, /* pArg */-
1173 pcache1Init, /* xInit */-
1174 pcache1Shutdown, /* xShutdown */-
1175 pcache1Create, /* xCreate */-
1176 pcache1Cachesize, /* xCachesize */-
1177 pcache1Pagecount, /* xPagecount */-
1178 pcache1Fetch, /* xFetch */-
1179 pcache1Unpin, /* xUnpin */-
1180 pcache1Rekey, /* xRekey */-
1181 pcache1Truncate, /* xTruncate */-
1182 pcache1Destroy, /* xDestroy */-
1183 pcache1Shrink /* xShrink */-
1184 };-
1185 sqlite3_config(SQLITE_CONFIG_PCACHE2, &defaultMethods);-
1186}
executed 438 times by 438 tests: end of block
Executed by:
  • Self test
  • Self test (10)
  • Self test (100)
  • Self test (101)
  • Self test (102)
  • Self test (103)
  • Self test (104)
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  • ...
438
1187-
1188/*-
1189** Return the size of the header on each page of this PCACHE implementation.-
1190*/-
1191int sqlite3HeaderSizePcache1(void){ return ROUND8(sizeof(PgHdr1)); }
never executed: return (((sizeof(PgHdr1))+7)&~7);
0
1192-
1193/*-
1194** Return the global mutex used by this PCACHE implementation. The-
1195** sqlite3_status() routine needs access to this mutex.-
1196*/-
1197sqlite3_mutex *sqlite3Pcache1Mutex(void){-
1198 return pcache1.mutex;
executed 2971 times by 1 test: return (pcache1_g).mutex;
Executed by:
  • Self test (438)
2971
1199}-
1200-
1201#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT-
1202/*-
1203** This function is called to free superfluous dynamically allocated memory-
1204** held by the pager system. Memory in use by any SQLite pager allocated-
1205** by the current thread may be sqlite3_free()ed.-
1206**-
1207** nReq is the number of bytes of memory required. Once this much has-
1208** been released, the function returns. The return value is the total number -
1209** of bytes of memory released.-
1210*/-
1211int sqlite3PcacheReleaseMemory(int nReq){-
1212 int nFree = 0;-
1213 assert( sqlite3_mutex_notheld(pcache1.grp.mutex) );-
1214 assert( sqlite3_mutex_notheld(pcache1.mutex) );-
1215 if( sqlite3GlobalConfig.pPage==0 ){-
1216 PgHdr1 *p;-
1217 pcache1EnterMutex(&pcache1.grp);-
1218 while( (nReq<0 || nFree<nReq)-
1219 && (p=pcache1.grp.lru.pLruPrev)!=0-
1220 && p->isAnchor==0-
1221 ){-
1222 nFree += pcache1MemSize(p->page.pBuf);-
1223#ifdef SQLITE_PCACHE_SEPARATE_HEADER-
1224 nFree += sqlite3MemSize(p);-
1225#endif-
1226 assert( PAGE_IS_UNPINNED(p) );-
1227 pcache1PinPage(p);-
1228 pcache1RemoveFromHash(p, 1);-
1229 }-
1230 pcache1LeaveMutex(&pcache1.grp);-
1231 }-
1232 return nFree;-
1233}-
1234#endif /* SQLITE_ENABLE_MEMORY_MANAGEMENT */-
1235-
1236#ifdef SQLITE_TEST-
1237/*-
1238** This function is used by test procedures to inspect the internal state-
1239** of the global cache.-
1240*/-
1241void sqlite3PcacheStats(-
1242 int *pnCurrent, /* OUT: Total number of pages cached */-
1243 int *pnMax, /* OUT: Global maximum cache size */-
1244 int *pnMin, /* OUT: Sum of PCache1.nMin for purgeable caches */-
1245 int *pnRecyclable /* OUT: Total number of pages available for recycling */-
1246){-
1247 PgHdr1 *p;-
1248 int nRecyclable = 0;-
1249 for(p=pcache1.grp.lru.pLruNext; p && !p->isAnchor; p=p->pLruNext){
pDescription
TRUEnever evaluated
FALSEnever evaluated
!p->isAnchorDescription
TRUEnever evaluated
FALSEnever evaluated
0
1250 assert( PAGE_IS_UNPINNED(p) );-
1251 nRecyclable++;-
1252 }
never executed: end of block
0
1253 *pnCurrent = pcache1.grp.nPurgeable;-
1254 *pnMax = (int)pcache1.grp.nMaxPage;-
1255 *pnMin = (int)pcache1.grp.nMinPage;-
1256 *pnRecyclable = nRecyclable;-
1257}
never executed: end of block
0
1258#endif-
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