compiler-rt/test/tsan/ignore_lib5.cpp

   1 // RUN: rm -rf %t-dir
   2 // RUN: mkdir %t-dir
   3
   4 // RUN: %clangxx_tsan -O1 -fno-builtin %s -DLIB -fPIC -fno-sanitize=thread -shared -o %t-dir/libignore_lib1.so
   5 // RUN: %clangxx_tsan -O1 %s %link_libcxx_tsan -o %t-dir/executable
   6 // RUN: echo running w/o suppressions:
   7 // RUN: %deflake %run %t-dir/executable | FileCheck %s --check-prefix=CHECK-NOSUPP
   8 // RUN: echo running with suppressions:
   9 // RUN: %env_tsan_opts=suppressions='%s.supp' %run %t-dir/executable 2>&1 | FileCheck %s --check-prefix=CHECK-WITHSUPP
  10
  11 // REQUIRES: stable-runtime
  12 // UNSUPPORTED: target=powerpc64le{{.*}}
  13 // FIXME: This test occasionally fails on powerpc64 LE possibly starting with
  14 // r279664.  Re-enable the test once the problem(s) have been fixed.
  15
  16 // Previously the test episodically failed with:
  17 //   ThreadSanitizer: called_from_lib suppression '/libignore_lib1.so$' is
  18 //   matched against 2 libraries: '/libignore_lib1.so' and '/libignore_lib1.so'
  19 // This was caused by non-atomicity of reading of /proc/self/maps.
  20
  21 // ReadProcMaps() on NetBSD does not handle >=1MB of memory layout information
  22 // UNSUPPORTED: target={{.*netbsd.*}}
  23
  24 #ifndef LIB
  25
  26 #include <dlfcn.h>
  27 #include <sys/mman.h>
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <errno.h>
  31 #include <libgen.h>
  32 #include <string>
  33 #include "test.h"
  34
  35 #ifndef MAP_32BIT
  36 # define MAP_32BIT 0
  37 #endif
  38
  39 #ifdef __APPLE__
  40 # define TSAN_MAP_ANON MAP_ANON
  41 #else
  42 # define TSAN_MAP_ANON MAP_ANONYMOUS
  43 #endif
  44
  45 void *thr(void *arg) {
  46   // This thread creates lots of separate mappings in /proc/self/maps before
  47   // the ignored library.
  48   for (int i = 0; i < 10000; i++) {
  49     if (i == 5000)
  50       barrier_wait(&barrier);
  51     mmap(0, 4096, PROT_READ, TSAN_MAP_ANON | MAP_PRIVATE | MAP_32BIT, -1 , 0);
  52     mmap(0, 4096, PROT_WRITE, TSAN_MAP_ANON | MAP_PRIVATE | MAP_32BIT, -1 , 0);
  53   }
  54   return 0;
  55 }
  56
  57 int main(int argc, char **argv) {
  58   barrier_init(&barrier, 2);
  59   pthread_t th;
  60   pthread_create(&th, 0, thr, 0);
  61   barrier_wait(&barrier);
  62   std::string lib = std::string(dirname(argv[0])) + "/libignore_lib1.so";
  63   void *h = dlopen(lib.c_str(), RTLD_GLOBAL | RTLD_NOW);
  64   if (h == 0)
  65     exit(printf("failed to load the library (%d)\n", errno));
  66   void (*f)() = (void(*)())dlsym(h, "libfunc");
  67   if (f == 0)
  68     exit(printf("failed to find the func (%d)\n", errno));
  69   pthread_join(th, 0);
  70   f();
  71 }
  72
  73 #else  // #ifdef LIB
  74
  75 #include "ignore_lib_lib.h"
  76
  77 #endif  // #ifdef LIB
  78
  79 // CHECK-NOSUPP: WARNING: ThreadSanitizer: data race
  80 // CHECK-NOSUPP: OK
  81
  82 // CHECK-WITHSUPP-NOT: WARNING: ThreadSanitizer: data race
  83 // CHECK-WITHSUPP: OK