compiler-rt/test/msan/dladdr_test.c

   1 /* RUN: %clang_msan -g %s -o %t
   2    RUN: %clang_msan -g %s -DBUILD_SO -fPIC -o %t-so.so -shared
   3    RUN: %run %t 2>&1 | FileCheck %s
   4
   5    REQUIRES: glibc{{.*}}
   6 */
   7
   8 #define _GNU_SOURCE
   9
  10 #ifndef BUILD_SO
  11 #include <assert.h>
  12 #include <dlfcn.h>
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15
  16 typedef volatile long *(* get_t)();
  17 get_t GetTls;
  18
  19 int main(int argc, char *argv[]) {
  20   char path[4096];
  21   snprintf(path, sizeof(path), "%s-so.so", argv[0]);
  22   int i;
  23
  24   void *handle = dlopen(path, RTLD_LAZY);
  25   if (!handle) fprintf(stderr, "%s\n", dlerror());
  26   assert(handle != 0);
  27   GetTls = (get_t)dlsym(handle, "GetTls");
  28   assert(dlerror() == 0);
  29
  30   Dl_info info;
  31   int ret = dladdr(GetTls, &info);
  32   assert (ret != 0);
  33   printf ("fname: %s\n", info.dli_fname);
  34   printf ("fbase: %p\n", info.dli_fbase);
  35   printf ("sname: %s\n", info.dli_sname);
  36   printf ("saddr: %p\n", info.dli_saddr);
  37
  38   // CHECK: sname: GetTls
  39
  40   return 0;
  41 }
  42 #else  // BUILD_SO
  43 long var;
  44 long *GetTls() {
  45   return &var;
  46 }
  47 #endif