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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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6fb1158a78
In a big applications, some recursive algorithms have created hundreds of thousands of stacktraces, taking a lot of memory. Option --merge-recursive-frames=<number> tells Valgrind to detect and merge (collapse) recursive calls when recording stack traces. The value is changeable using the monitor command 'v.set merge-recursive-frames'. Also, this provides a new client request: VALGRIND_MONITOR_COMMAND allowing to execute a gdbsrv monitor command from the client program. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13246
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <valgrind.h>
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void (*fnptr[256])(char*, char*);
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#define BODY(f) \
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{ \
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fprintf(stderr, f); \
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calls++; \
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(*fnptr[(int)*calls])(calls,seq); \
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}
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void stacktrace(char*last, char* callsequence)
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{
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fprintf(stderr, "\n");
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VALGRIND_PRINTF_BACKTRACE (callsequence);
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}
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__attribute__((noinline)) void f_a(char *calls, char*seq);
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__attribute__((noinline)) void f_b(char *calls, char*seq);
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__attribute__((noinline)) void f_c(char *calls, char*seq);
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__attribute__((noinline)) void f_d(char *calls, char*seq);
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__attribute__((noinline)) void f_a(char *calls, char*seq)
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BODY("a")
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__attribute__((noinline)) void f_b(char *calls, char*seq)
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BODY("b")
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__attribute__((noinline)) void f_c(char *calls, char*seq)
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BODY("c");
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__attribute__((noinline)) void f_d(char *calls, char*seq)
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BODY("d");
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void doit (int argc, char**argv)
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{
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int i;
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for (i = 1; i < argc; i++) {
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char* calls = argv[i];
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char* seq = argv[i];
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calls--;
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BODY("test ")
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}
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}
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int main(int argc, char**argv)
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{
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fnptr[0] = stacktrace;
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fnptr['a'] = f_a;
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fnptr['b'] = f_b;
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fnptr['c'] = f_c;
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fnptr['d'] = f_d;
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doit(argc, argv); // with default value of our argument.
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VALGRIND_MONITOR_COMMAND("v.set merge-recursive-frames 3");
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doit(argc, argv);
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VALGRIND_MONITOR_COMMAND("v.set merge-recursive-frames 2");
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doit(argc, argv);
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VALGRIND_MONITOR_COMMAND("v.set merge-recursive-frames 1");
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doit(argc, argv);
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VALGRIND_MONITOR_COMMAND("v.set merge-recursive-frames 0");
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doit(argc, argv);
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return 0;
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}
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