test/asan/TestCases/init-order-dlopen.cc

   1 // Regression test for
   2 // https://code.google.com/p/address-sanitizer/issues/detail?id=178
   3
   4 // Assume we're on Darwin and try to pass -U to the linker. If this flag is
   5 // unsupported, don't use it.
   6 // RUN: %clangxx_asan -O0 %p/SharedLibs/init-order-dlopen-so.cc \
   7 // RUN:     -fPIC -shared -o %t-so.so -Wl,-U,_inc_global || \
   8 // RUN:     %clangxx_asan -O0 %p/SharedLibs/init-order-dlopen-so.cc \
   9 // RUN:         -fPIC -shared -o %t-so.so
  10 // If the linker doesn't support --export-dynamic (which is ELF-specific),
  11 // try to link without that option.
  12 // FIXME: find a better solution.
  13 // RUN: %clangxx_asan -O0 %s -o %t -Wl,--export-dynamic || \
  14 // RUN:     %clangxx_asan -O0 %s -o %t
  15 // RUN: ASAN_OPTIONS=strict_init_order=true %t 2>&1 | FileCheck %s
  16 #include <dlfcn.h>
  17 #include <pthread.h>
  18 #include <stdio.h>
  19 #include <unistd.h>
  20
  21 #include <string>
  22
  23 using std::string;
  24
  25 int foo() {
  26   return 42;
  27 }
  28 int global = foo();
  29
  30 __attribute__((visibility("default")))
  31 extern "C"
  32 void inc_global() {
  33   global++;
  34 }
  35
  36 void *global_poller(void *arg) {
  37   while (true) {
  38     if (global != 42)
  39       break;
  40     usleep(100);
  41   }
  42   return 0;
  43 }
  44
  45 int main(int argc, char *argv[]) {
  46   pthread_t p;
  47   pthread_create(&p, 0, global_poller, 0);
  48   string path = string(argv[0]) + "-so.so";
  49   if (0 == dlopen(path.c_str(), RTLD_NOW)) {
  50     fprintf(stderr, "dlerror: %s\n", dlerror());
  51     return 1;
  52   }
  53   pthread_join(p, 0);
  54   printf("PASSED\n");
  55   // CHECK: PASSED
  56   return 0;
  57 }