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e541a28d PMF |
1 | #define _GNU_SOURCE |
2 | #include <dlfcn.h> | |
3 | #include <sys/types.h> | |
4 | #include <stdio.h> | |
5 | ||
fbd8191b PMF |
6 | #include "marker.h" |
7 | ||
c61f7385 PMF |
8 | #if 0 |
9 | INTERCEPT_PROTOTYPE(void, malloc, size_t size) | |
10 | INTERCEPT_TRACE("size %d", size) | |
11 | INTERCEPT_CALL_ARGS(size) | |
12 | INTERCEPT() | |
13 | ||
14 | #define INTERCEPT_FUNC(type, name, args...) \ | |
15 | __I_FUNC_TYPE(type) \ | |
16 | __I_FUNC_NAME(name) \ | |
17 | __I_FUNC_ARGS(args) | |
18 | ||
19 | #define INTERCEPT_TRACE(fmt, args...) \ | |
20 | #define __I_TRACE_FMT fmt \ | |
21 | #define __I_TRACE_ARGS args | |
22 | ||
23 | #define INTERCEPT_CALL_ARGS(args...) \ | |
24 | #define __I_CALL_ARGS args | |
25 | ||
26 | #define INTERCEPT() \ | |
27 | __I_FUNC_TYPE __I_FUNC_NAME(__I_FUNC_ARGS) \ | |
28 | { \ | |
29 | static __I_FUNC_TYPE (*plibc_ ## __I_FUNC_NAME)(args) = NULL; \ | |
30 | \ | |
31 | if(plibc_ ## __I_FUNC_NAME == NULL) { \ | |
32 | plibc_ ## __I_FUNC_NAME = dlsym(RTLD_NEXT, "malloc"); \ | |
33 | if(plibc_ ## __I_FUNC_NAME == NULL) { \ | |
34 | fprintf(stderr, "mallocwrap: unable to find malloc\n"); \ | |
35 | return NULL; \ | |
36 | } \ | |
37 | } \ | |
38 | \ | |
39 | trace_mark(ust, __I_FUNC_NAME, __I_TRACE_FMT, __I_TRACE_ARGS); \ | |
40 | \ | |
41 | return plibc_ ## __I_FUNC_NAME (__I_CALL_ARGS); \ | |
42 | } | |
43 | #endif | |
e541a28d PMF |
44 | |
45 | void *malloc(size_t size) | |
46 | { | |
1c184644 PMF |
47 | static void *(*plibc_malloc)(size_t size) = NULL; |
48 | ||
49 | void *retval; | |
50 | ||
e541a28d PMF |
51 | if(plibc_malloc == NULL) { |
52 | plibc_malloc = dlsym(RTLD_NEXT, "malloc"); | |
53 | if(plibc_malloc == NULL) { | |
54 | fprintf(stderr, "mallocwrap: unable to find malloc\n"); | |
55 | return NULL; | |
56 | } | |
57 | } | |
fbd8191b | 58 | |
1c184644 PMF |
59 | retval = plibc_malloc(size); |
60 | ||
61 | trace_mark(ust, malloc, "size %d ptr %p", (int)size, retval); | |
62 | ||
63 | return retval; | |
64 | } | |
65 | ||
66 | void free(void *ptr) | |
67 | { | |
68 | static void *(*plibc_free)(void *ptr) = NULL; | |
69 | ||
70 | if(plibc_free == NULL) { | |
71 | plibc_free = dlsym(RTLD_NEXT, "free"); | |
72 | if(plibc_free == NULL) { | |
73 | fprintf(stderr, "mallocwrap: unable to find free\n"); | |
74 | return NULL; | |
75 | } | |
76 | } | |
77 | ||
78 | trace_mark(ust, free, "%p", ptr); | |
fbd8191b | 79 | |
1c184644 | 80 | return plibc_free(ptr); |
e541a28d | 81 | } |
fbd8191b PMF |
82 | |
83 | MARKER_LIB |