valgrind.h revision bd87b01999416ec7418ff8bdb504d9b6c009ff68 
1/******************************************************************************/
2#ifdef JEMALLOC_H_TYPES
3
4#ifdef JEMALLOC_VALGRIND
5#include <valgrind/valgrind.h>
6
7/*
8 * The size that is reported to Valgrind must be consistent through a chain of
9 * malloc..realloc..realloc calls.  Request size isn't recorded anywhere in
10 * jemalloc, so it is critical that all callers of these macros provide usize
11 * rather than request size.  As a result, buffer overflow detection is
12 * technically weakened for the standard API, though it is generally accepted
13 * practice to consider any extra bytes reported by malloc_usable_size() as
14 * usable space.
15 */
16#define	JEMALLOC_VALGRIND_MAKE_MEM_NOACCESS(ptr, usize) do {		\
17	if (in_valgrind)						\
18		valgrind_make_mem_noaccess(ptr, usize);			\
19} while (0)
20#define	JEMALLOC_VALGRIND_MAKE_MEM_UNDEFINED(ptr, usize) do {		\
21	if (in_valgrind)						\
22		valgrind_make_mem_undefined(ptr, usize);		\
23} while (0)
24#define	JEMALLOC_VALGRIND_MAKE_MEM_DEFINED(ptr, usize) do {		\
25	if (in_valgrind)						\
26		valgrind_make_mem_defined(ptr, usize);			\
27} while (0)
28/*
29 * The VALGRIND_MALLOCLIKE_BLOCK() and VALGRIND_RESIZEINPLACE_BLOCK() macro
30 * calls must be embedded in macros rather than in functions so that when
31 * Valgrind reports errors, there are no extra stack frames in the backtraces.
32 */
33#define	JEMALLOC_VALGRIND_MALLOC(cond, ptr, usize, zero) do {		\
34	if (in_valgrind && cond)					\
35		VALGRIND_MALLOCLIKE_BLOCK(ptr, usize, p2rz(ptr), zero);	\
36} while (0)
37#define	JEMALLOC_VALGRIND_REALLOC(maybe_moved, ptr, usize,		\
38    ptr_maybe_null, old_ptr, old_usize, old_rzsize, old_ptr_maybe_null,	\
39    zero) do {								\
40	if (in_valgrind) {						\
41		size_t rzsize = p2rz(ptr);				\
42									\
43		if (!maybe_moved || ptr == old_ptr) {			\
44			VALGRIND_RESIZEINPLACE_BLOCK(ptr, old_usize,	\
45			    usize, rzsize);				\
46			if (zero && old_usize < usize) {		\
47				valgrind_make_mem_defined(		\
48				    (void *)((uintptr_t)ptr +		\
49				    old_usize), usize - old_usize);	\
50			}						\
51		} else {						\
52			if (!old_ptr_maybe_null || old_ptr != NULL) {	\
53				valgrind_freelike_block(old_ptr,	\
54				    old_rzsize);			\
55			}						\
56			if (!ptr_maybe_null || ptr != NULL) {		\
57				size_t copy_size = (old_usize < usize)	\
58				    ?  old_usize : usize;		\
59				size_t tail_size = usize - copy_size;	\
60				VALGRIND_MALLOCLIKE_BLOCK(ptr, usize,	\
61				    rzsize, false);			\
62				if (copy_size > 0) {			\
63					valgrind_make_mem_defined(ptr,	\
64					copy_size);			\
65				}					\
66				if (zero && tail_size > 0) {		\
67					valgrind_make_mem_defined(	\
68					    (void *)((uintptr_t)ptr +	\
69					    copy_size), tail_size);	\
70				}					\
71			}						\
72		}							\
73	}								\
74} while (0)
75#define	JEMALLOC_VALGRIND_FREE(ptr, rzsize) do {			\
76	if (in_valgrind)						\
77		valgrind_freelike_block(ptr, rzsize);			\
78} while (0)
79#else
80#define	RUNNING_ON_VALGRIND	((unsigned)0)
81#define	JEMALLOC_VALGRIND_MAKE_MEM_NOACCESS(ptr, usize) do {} while (0)
82#define	JEMALLOC_VALGRIND_MAKE_MEM_UNDEFINED(ptr, usize) do {} while (0)
83#define	JEMALLOC_VALGRIND_MAKE_MEM_DEFINED(ptr, usize) do {} while (0)
84#define	JEMALLOC_VALGRIND_MALLOC(cond, ptr, usize, zero) do {} while (0)
85#define	JEMALLOC_VALGRIND_REALLOC(maybe_moved, ptr, usize,		\
86    ptr_maybe_null, old_ptr, old_usize, old_rzsize, old_ptr_maybe_null,	\
87    zero) do {} while (0)
88#define	JEMALLOC_VALGRIND_FREE(ptr, rzsize) do {} while (0)
89#endif
90
91#endif /* JEMALLOC_H_TYPES */
92/******************************************************************************/
93#ifdef JEMALLOC_H_STRUCTS
94
95#endif /* JEMALLOC_H_STRUCTS */
96/******************************************************************************/
97#ifdef JEMALLOC_H_EXTERNS
98
99#ifdef JEMALLOC_VALGRIND
100void	valgrind_make_mem_noaccess(void *ptr, size_t usize);
101void	valgrind_make_mem_undefined(void *ptr, size_t usize);
102void	valgrind_make_mem_defined(void *ptr, size_t usize);
103void	valgrind_freelike_block(void *ptr, size_t usize);
104#endif
105
106#endif /* JEMALLOC_H_EXTERNS */
107/******************************************************************************/
108#ifdef JEMALLOC_H_INLINES
109
110#endif /* JEMALLOC_H_INLINES */
111/******************************************************************************/
112
113