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xmalloc.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/bash/src/xmalloc.c
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1/* xmalloc.c -- safe versions of malloc and realloc */-
2-
3/* Copyright (C) 1991-2016 Free Software Foundation, Inc.-
4-
5 This file is part of GNU Bash, the GNU Bourne Again SHell.-
6-
7 Bash is free software: you can redistribute it and/or modify-
8 it under the terms of the GNU General Public License as published by-
9 the Free Software Foundation, either version 3 of the License, or-
10 (at your option) any later version.-
11-
12 Bash is distributed in the hope that it will be useful,-
13 but WITHOUT ANY WARRANTY; without even the implied warranty of-
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the-
15 GNU General Public License for more details.-
16-
17 You should have received a copy of the GNU General Public License-
18 along with Bash. If not, see <http://www.gnu.org/licenses/>.-
19*/-
20-
21#if defined (HAVE_CONFIG_H)-
22#include <config.h>-
23#endif-
24-
25#include "bashtypes.h"-
26#include <stdio.h>-
27-
28#if defined (HAVE_UNISTD_H)-
29# include <unistd.h>-
30#endif-
31-
32#if defined (HAVE_STDLIB_H)-
33# include <stdlib.h>-
34#else-
35# include "ansi_stdlib.h"-
36#endif /* HAVE_STDLIB_H */-
37-
38#include "error.h"-
39-
40#include "bashintl.h"-
41-
42#if !defined (PTR_T)-
43# if defined (__STDC__)-
44# define PTR_T void *-
45# else-
46# define PTR_T char *-
47# endif /* !__STDC__ */-
48#endif /* !PTR_T */-
49-
50#if defined (HAVE_SBRK) && !HAVE_DECL_SBRK-
51extern char *sbrk();-
52#endif-
53-
54#if defined (HAVE_SBRK) && defined (USING_BASH_MALLOC)-
55static PTR_T lbreak;-
56static int brkfound;-
57static size_t allocated;-
58#endif-
59-
60/* **************************************************************** */-
61/* */-
62/* Memory Allocation and Deallocation. */-
63/* */-
64/* **************************************************************** */-
65-
66#if defined (HAVE_SBRK) && defined (USING_BASH_MALLOC)-
67#define FINDBRK() \-
68do { \-
69 if (brkfound == 0) \-
70 { \-
71 lbreak = (PTR_T)sbrk (0); \-
72 brkfound++; \-
73 } \-
74} while (0)-
75-
76static size_t-
77findbrk ()-
78{-
79 FINDBRK();
never executed: end of block
brkfound == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
80 return (char *)sbrk (0) - (char *)lbreak;
never executed: return (char *)sbrk (0) - (char *)lbreak;
0
81}-
82#else-
83#define FINDBRK()-
84#endif-
85-
86static void-
87allocerr (func, bytes)-
88 const char *func;-
89 size_t bytes;-
90{-
91#if defined (HAVE_SBRK) && defined (USING_BASH_MALLOC)-
92 allocated = findbrk ();-
93 fatal_error (_("%s: cannot allocate %lu bytes (%lu bytes allocated)"), func, (unsigned long)bytes, (unsigned long)allocated);-
94#else-
95 fatal_error (_("%s: cannot allocate %lu bytes"), func, (unsigned long)bytes);-
96#endif /* !HAVE_SBRK */-
97}
never executed: end of block
0
98-
99/* Return a pointer to free()able block of memory large enough-
100 to hold BYTES number of bytes. If the memory cannot be allocated,-
101 print an error message and abort. */-
102PTR_T-
103xmalloc (bytes)-
104 size_t bytes;-
105{-
106 PTR_T temp;-
107-
108#if defined (DEBUG)-
109 if (bytes == 0)
bytes == 0Description
TRUEnever evaluated
FALSEevaluated 2424 times by 1 test
Evaluated by:
  • Self test
0-2424
110 internal_warning("xmalloc: size argument is 0");
never executed: internal_warning("xmalloc: size argument is 0");
0
111#endif-
112-
113 FINDBRK();
never executed: end of block
brkfound == 0Description
TRUEnever evaluated
FALSEevaluated 2424 times by 1 test
Evaluated by:
  • Self test
0-2424
114 temp = malloc (bytes);-
115-
116 if (temp == 0)
temp == 0Description
TRUEnever evaluated
FALSEevaluated 2424 times by 1 test
Evaluated by:
  • Self test
0-2424
117 allocerr ("xmalloc", bytes);
never executed: allocerr ("xmalloc", bytes);
0
118-
119 return (temp);
executed 2424 times by 1 test: return (temp);
Executed by:
  • Self test
2424
120}-
121-
122PTR_T-
123xrealloc (pointer, bytes)-
124 PTR_T pointer;-
125 size_t bytes;-
126{-
127 PTR_T temp;-
128-
129#if defined (DEBUG)-
130 if (bytes == 0)
bytes == 0Description
TRUEnever evaluated
FALSEevaluated 42 times by 1 test
Evaluated by:
  • Self test
0-42
131 internal_warning("xrealloc: size argument is 0");
never executed: internal_warning("xrealloc: size argument is 0");
0
132#endif-
133-
134 FINDBRK();
never executed: end of block
brkfound == 0Description
TRUEnever evaluated
FALSEevaluated 42 times by 1 test
Evaluated by:
  • Self test
0-42
135 temp = pointer ? realloc (pointer, bytes) : malloc (bytes);
pointerDescription
TRUEevaluated 11 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 31 times by 1 test
Evaluated by:
  • Self test
11-31
136-
137 if (temp == 0)
temp == 0Description
TRUEnever evaluated
FALSEevaluated 42 times by 1 test
Evaluated by:
  • Self test
0-42
138 allocerr ("xrealloc", bytes);
never executed: allocerr ("xrealloc", bytes);
0
139-
140 return (temp);
executed 42 times by 1 test: return (temp);
Executed by:
  • Self test
42
141}-
142-
143/* Use this as the function to call when adding unwind protects so we-
144 don't need to know what free() returns. */-
145void-
146xfree (string)-
147 PTR_T string;-
148{-
149 if (string)
stringDescription
TRUEevaluated 23833 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 6254 times by 1 test
Evaluated by:
  • Self test
6254-23833
150 free (string);
executed 23833 times by 1 test: free (string);
Executed by:
  • Self test
23833
151}
executed 30087 times by 1 test: end of block
Executed by:
  • Self test
30087
152-
153#ifdef USING_BASH_MALLOC-
154#include <malloc/shmalloc.h>-
155-
156static void-
157sh_allocerr (func, bytes, file, line)-
158 const char *func;-
159 size_t bytes;-
160 char *file;-
161 int line;-
162{-
163#if defined (HAVE_SBRK)-
164 allocated = findbrk ();-
165 fatal_error (_("%s: %s:%d: cannot allocate %lu bytes (%lu bytes allocated)"), func, file, line, (unsigned long)bytes, (unsigned long)allocated);-
166#else-
167 fatal_error (_("%s: %s:%d: cannot allocate %lu bytes"), func, file, line, (unsigned long)bytes);-
168#endif /* !HAVE_SBRK */-
169}
never executed: end of block
0
170-
171PTR_T-
172sh_xmalloc (bytes, file, line)-
173 size_t bytes;-
174 char *file;-
175 int line;-
176{-
177 PTR_T temp;-
178-
179#if defined (DEBUG)-
180 if (bytes == 0)
bytes == 0Description
TRUEnever evaluated
FALSEevaluated 2147483647 times by 1 test
Evaluated by:
  • Self test
0-Inf
181 internal_warning("xmalloc: %s:%d: size argument is 0", file, line);
never executed: internal_warning("xmalloc: %s:%d: size argument is 0", file, line);
0
182#endif-
183-
184 FINDBRK();
executed 5432 times by 1 test: end of block
Executed by:
  • Self test
brkfound == 0Description
TRUEevaluated 5432 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 2147483647 times by 1 test
Evaluated by:
  • Self test
5432-Inf
185 temp = sh_malloc (bytes, file, line);-
186-
187 if (temp == 0)
temp == 0Description
TRUEnever evaluated
FALSEevaluated 2147483647 times by 1 test
Evaluated by:
  • Self test
0-Inf
188 sh_allocerr ("xmalloc", bytes, file, line);
never executed: sh_allocerr ("xmalloc", bytes, file, line);
0
189-
190 return (temp);
executed 2147483647 times by 1 test: return (temp);
Executed by:
  • Self test
Inf
191}-
192-
193PTR_T-
194sh_xrealloc (pointer, bytes, file, line)-
195 PTR_T pointer;-
196 size_t bytes;-
197 char *file;-
198 int line;-
199{-
200 PTR_T temp;-
201-
202#if defined (DEBUG)-
203 if (bytes == 0)
bytes == 0Description
TRUEnever evaluated
FALSEevaluated 4814432 times by 1 test
Evaluated by:
  • Self test
0-4814432
204 internal_warning("xrealloc: %s:%d: size argument is 0", file, line);
never executed: internal_warning("xrealloc: %s:%d: size argument is 0", file, line);
0
205#endif-
206-
207 FINDBRK();
never executed: end of block
brkfound == 0Description
TRUEnever evaluated
FALSEevaluated 4814432 times by 1 test
Evaluated by:
  • Self test
0-4814432
208 temp = pointer ? sh_realloc (pointer, bytes, file, line) : sh_malloc (bytes, file, line);
pointerDescription
TRUEevaluated 92882 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 4721550 times by 1 test
Evaluated by:
  • Self test
92882-4721550
209-
210 if (temp == 0)
temp == 0Description
TRUEnever evaluated
FALSEevaluated 4814432 times by 1 test
Evaluated by:
  • Self test
0-4814432
211 sh_allocerr ("xrealloc", bytes, file, line);
never executed: sh_allocerr ("xrealloc", bytes, file, line);
0
212-
213 return (temp);
executed 4814432 times by 1 test: return (temp);
Executed by:
  • Self test
4814432
214}-
215-
216void-
217sh_xfree (string, file, line)-
218 PTR_T string;-
219 char *file;-
220 int line;-
221{-
222 if (string)
stringDescription
TRUEevaluated 2147483647 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 365685933 times by 1 test
Evaluated by:
  • Self test
365685933-Inf
223 sh_free (string, file, line);
executed 2147483647 times by 1 test: sh_free (string, file, line);
Executed by:
  • Self test
Inf
224}
executed 2147483647 times by 1 test: end of block
Executed by:
  • Self test
Inf
225#endif-
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