compiler-rt/test/msan/backtrace.cpp

   1 // RUN: %clangxx_msan -O0 %s -o %t && %run %t
   2
   3 #include <assert.h>
   4 #include <execinfo.h>
   5 #include <stdio.h>
   6 #include <string.h>
   7 #include <stdlib.h>
   8
   9 __attribute__((noinline))
  10 void f() {
  11   void *buf[10];
  12   int sz = backtrace(buf, sizeof(buf) / sizeof(*buf));
  13   assert(sz > 0);
  14   for (int i = 0; i < sz; ++i)
  15     if (!buf[i]) {
  16 #if defined(__s390x__)
  17       // backtrace() may return a bogus trailing NULL on s390x.
  18       if (i == sz - 1)
  19         continue;
  20 #endif
  21       exit(1);
  22     }
  23   char **s = backtrace_symbols(buf, sz);
  24   assert(s != 0);
  25   for (int i = 0; i < sz; ++i)
  26     printf("%d\n", (int)strlen(s[i]));
  27 }
  28
  29 int main(void) {
  30   f();
  31   return 0;
  32 }