1
/* TMP_ALLOC routines for debugging.
3
Copyright 2000, 2001 Free Software Foundation, Inc.
5
This file is part of the GNU MP Library.
7
The GNU MP Library is free software; you can redistribute it and/or modify
8
it under the terms of the GNU Lesser General Public License as published by
9
the Free Software Foundation; either version 2.1 of the License, or (at your
10
option) any later version.
12
The GNU MP Library is distributed in the hope that it will be useful, but
13
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15
License for more details.
17
You should have received a copy of the GNU Lesser General Public License
18
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
19
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20
MA 02111-1307, USA. */
27
/* This method aims to help a malloc debugger find problems. A linked list
28
of allocated block is kept for TMP_FREE to release. This is reentrant
31
Each TMP_ALLOC is a separate malloced block, so redzones or sentinels
32
applied by a malloc debugger either above or below can guard against
33
accesses outside the allocated area.
35
A marker is a "struct tmp_debug_t *" so that TMP_DECL can initialize it
36
to NULL and we can detect TMP_ALLOC without TMP_MARK.
38
It will work to realloc an MPZ_TMP_INIT variable, but when TMP_FREE comes
39
to release the memory it will have the old size, thereby triggering an
40
error from tests/memory.c.
44
It'd be possible to keep a global list of active "struct tmp_debug_t"
45
records, so at the end of a program any TMP leaks could be printed. But
46
if only a couple of routines are under test at any one time then the
47
likely culprit should be easy enough to spot. */
51
__gmp_tmp_debug_mark (const char *file, int line,
52
struct tmp_debug_t **markp, struct tmp_debug_t *mark,
53
const char *decl_name, const char *mark_name)
55
if (strcmp (mark_name, decl_name) != 0)
57
__gmp_assert_header (file, line);
58
fprintf (stderr, "GNU MP: TMP_MARK(%s) but TMP_DECL(%s) is in scope\n",
59
mark_name, decl_name);
65
__gmp_assert_header (file, line);
66
fprintf (stderr, "GNU MP: Repeat of TMP_MARK(%s)\n", mark_name);
67
if (mark->file != NULL && mark->file[0] != '\0' && mark->line != -1)
69
__gmp_assert_header (mark->file, mark->line);
70
fprintf (stderr, "previous was here\n");
82
__gmp_tmp_debug_alloc (const char *file, int line, int dummy,
83
struct tmp_debug_t **markp,
84
const char *decl_name, size_t size)
86
struct tmp_debug_t *mark = *markp;
87
struct tmp_debug_entry_t *p;
89
ASSERT_ALWAYS (size >= 1);
93
__gmp_assert_header (file, line);
94
fprintf (stderr, "GNU MP: TMP_ALLOC without TMP_MARK(%s)\n", decl_name);
98
p = __GMP_ALLOCATE_FUNC_TYPE (1, struct tmp_debug_entry_t);
100
p->block = (*__gmp_allocate_func) (size);
101
p->next = mark->list;
107
__gmp_tmp_debug_free (const char *file, int line, int dummy,
108
struct tmp_debug_t **markp,
109
const char *decl_name, const char *free_name)
111
struct tmp_debug_t *mark = *markp;
112
struct tmp_debug_entry_t *p, *next;
116
__gmp_assert_header (file, line);
117
fprintf (stderr, "GNU MP: TMP_FREE(%s) without TMP_MARK(%s)\n",
118
free_name, decl_name);
122
if (strcmp (free_name, decl_name) != 0)
124
__gmp_assert_header (file, line);
125
fprintf (stderr, "GNU MP: TMP_FREE(%s) when TMP_DECL(%s) is in scope\n",
126
free_name, decl_name);
134
(*__gmp_free_func) (p->block, p->size);
135
__GMP_FREE_FUNC_TYPE (p, 1, struct tmp_debug_entry_t);