compiler-rt/test/sanitizer_common/TestCases/Linux/tls_get_addr.c

   1 // RUN: %clang -g %s -o %t
   2 // RUN: %clang -g %s -DBUILD_SO -fPIC -o %t-so.so -shared
   3 // RUN: %run %t 2>&1 | FileCheck %s
   4
   5 // REQUIRES: glibc
   6
   7 // `__tls_get_addr` is somehow not invoked.
   8 // XFAIL: i386-linux
   9
  10 // These don't intercept __tls_get_addr.
  11 // XFAIL: lsan,hwasan,ubsan
  12
  13 // FIXME: Fails for unknown reasons.
  14 // UNSUPPORTED: powerpc64le-target-arch
  15
  16 #ifndef BUILD_SO
  17 #  include <assert.h>
  18 #  include <dlfcn.h>
  19 #  include <pthread.h>
  20 #  include <stdio.h>
  21 #  include <stdlib.h>
  22
  23 // CHECK-COUNT-2: __sanitizer_get_dtls_size:
  24 size_t __sanitizer_get_dtls_size(const void *ptr)
  25     __attribute__((disable_sanitizer_instrumentation)) {
  26   fprintf(stderr, "__sanitizer_get_dtls_size: %p\n", ptr);
  27   return 0;
  28 }
  29
  30 typedef long *(*get_t)();
  31 get_t GetTls;
  32 void *Thread(void *unused) { return GetTls(); }
  33
  34 int main(int argc, char *argv[]) {
  35   char path[4096];
  36   snprintf(path, sizeof(path), "%s-so.so", argv[0]);
  37   int i;
  38
  39   void *handle = dlopen(path, RTLD_LAZY);
  40   if (!handle)
  41     fprintf(stderr, "%s\n", dlerror());
  42   assert(handle != 0);
  43   GetTls = (get_t)dlsym(handle, "GetTls");
  44   assert(dlerror() == 0);
  45
  46   pthread_t t;
  47   pthread_create(&t, 0, Thread, 0);
  48   pthread_join(t, 0);
  49   pthread_create(&t, 0, Thread, 0);
  50   pthread_join(t, 0);
  51   return 0;
  52 }
  53 #else // BUILD_SO
  54 __thread long huge_thread_local_array[1 << 17];
  55 long *GetTls() { return &huge_thread_local_array[0]; }
  56 #endif