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