1 #include <stdlib.h>
2 #include <stdio.h>
3 #include <valgrind.h>
4
5 void (*fnptr[256])(char*, char*);
6
7 #define BODY(f) \
8 { \
9 fprintf(stderr, f); \
10 calls++; \
11 (*fnptr[(int)*calls])(calls,seq); \
12 }
13
stacktrace(char * last,char * callsequence)14 void stacktrace(char*last, char* callsequence)
15 {
16 fprintf(stderr, "\n");
17 VALGRIND_PRINTF_BACKTRACE ("%s", callsequence);
18 }
19 __attribute__((noinline)) void f_a(char *calls, char*seq);
20 __attribute__((noinline)) void f_b(char *calls, char*seq);
21 __attribute__((noinline)) void f_c(char *calls, char*seq);
22 __attribute__((noinline)) void f_d(char *calls, char*seq);
23
24 __attribute__((noinline)) void f_a(char *calls, char*seq)
25 BODY("a")
26
27 __attribute__((noinline)) void f_b(char *calls, char*seq)
28 BODY("b")
29
30 __attribute__((noinline)) void f_c(char *calls, char*seq)
31 BODY("c");
32
33 __attribute__((noinline)) void f_d(char *calls, char*seq)
34 BODY("d");
35
doit(int argc,char ** argv)36 void doit (int argc, char**argv)
37 {
38 int i;
39 for (i = 1; i < argc; i++) {
40 char* calls = argv[i];
41 char* seq = argv[i];
42 calls--;
43 BODY("test ")
44 }
45 }
46
main(int argc,char ** argv)47 int main(int argc, char**argv)
48 {
49
50 fnptr[0] = stacktrace;
51 fnptr['a'] = f_a;
52 fnptr['b'] = f_b;
53 fnptr['c'] = f_c;
54 fnptr['d'] = f_d;
55
56 doit(argc, argv); // with default value of our argument.
57
58 (void) VALGRIND_MONITOR_COMMAND("v.set merge-recursive-frames 3");
59 doit(argc, argv);
60
61 (void) VALGRIND_MONITOR_COMMAND("v.set merge-recursive-frames 2");
62 doit(argc, argv);
63
64 (void) VALGRIND_MONITOR_COMMAND("v.set merge-recursive-frames 1");
65 doit(argc, argv);
66
67 (void) VALGRIND_MONITOR_COMMAND("v.set merge-recursive-frames 0");
68 doit(argc, argv);
69
70 return 0;
71 }
72