forked from OSchip/llvm-project
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
// RUN: rm -rf %t-dir
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// RUN: mkdir %t-dir
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// RUN: %clangxx_tsan -O1 %s -DLIB -fPIC -fno-sanitize=thread -shared -o %t-dir/libignore_lib1.so
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// RUN: %clangxx_tsan -O1 %s %link_libcxx_tsan -o %t-dir/executable
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// RUN: echo running w/o suppressions:
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// RUN: %deflake %run %t-dir/executable | FileCheck %s --check-prefix=CHECK-NOSUPP
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// RUN: echo running with suppressions:
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// RUN: %env_tsan_opts=suppressions='%s.supp' %run %t-dir/executable 2>&1 | FileCheck %s --check-prefix=CHECK-WITHSUPP
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// REQUIRES: stable-runtime
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// UNSUPPORTED: powerpc64le
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// FIXME: This test occasionally fails on powerpc64 LE possibly starting with
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// r279664. Re-enable the test once the problem(s) have been fixed.
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// Previously the test episodically failed with:
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// ThreadSanitizer: called_from_lib suppression '/libignore_lib1.so$' is
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// matched against 2 libraries: '/libignore_lib1.so' and '/libignore_lib1.so'
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// This was caused by non-atomicity of reading of /proc/self/maps.
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// ReadProcMaps() on NetBSD does not handle >=1MB of memory layout information
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// UNSUPPORTED: netbsd
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#ifndef LIB
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#include <dlfcn.h>
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#include <sys/mman.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <libgen.h>
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#include <string>
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#include "test.h"
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#ifndef MAP_32BIT
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# define MAP_32BIT 0
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#endif
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#ifdef __APPLE__
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# define TSAN_MAP_ANON MAP_ANON
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#else
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# define TSAN_MAP_ANON MAP_ANONYMOUS
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#endif
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void *thr(void *arg) {
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// This thread creates lots of separate mappings in /proc/self/maps before
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// the ignored library.
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for (int i = 0; i < 10000; i++) {
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if (i == 5000)
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barrier_wait(&barrier);
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mmap(0, 4096, PROT_READ, TSAN_MAP_ANON | MAP_PRIVATE | MAP_32BIT, -1 , 0);
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mmap(0, 4096, PROT_WRITE, TSAN_MAP_ANON | MAP_PRIVATE | MAP_32BIT, -1 , 0);
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}
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return 0;
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}
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int main(int argc, char **argv) {
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barrier_init(&barrier, 2);
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pthread_t th;
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pthread_create(&th, 0, thr, 0);
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barrier_wait(&barrier);
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std::string lib = std::string(dirname(argv[0])) + "/libignore_lib1.so";
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void *h = dlopen(lib.c_str(), RTLD_GLOBAL | RTLD_NOW);
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if (h == 0)
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exit(printf("failed to load the library (%d)\n", errno));
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void (*f)() = (void(*)())dlsym(h, "libfunc");
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if (f == 0)
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exit(printf("failed to find the func (%d)\n", errno));
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pthread_join(th, 0);
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f();
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}
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#else // #ifdef LIB
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#include "ignore_lib_lib.h"
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#endif // #ifdef LIB
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// CHECK-NOSUPP: WARNING: ThreadSanitizer: data race
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// CHECK-NOSUPP: OK
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// CHECK-WITHSUPP-NOT: WARNING: ThreadSanitizer: data race
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// CHECK-WITHSUPP: OK
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