562c6b8019
Summary: This substitution expands to the appropriate minimum deployment target flag where thread local storage (TLS) was first introduced on Darwin platforms. For all other platforms the substitution expands to an empty string. E.g. for macOS the substitution expands to `-mmacosx-version-min=10.12` This patch adds support for the substitution (and future substitutions) by doing a minor refactor and then uses the substitution in the relevant TSan tests. rdar://problem/59568956 Reviewers: yln, kubamracek, dvyukov, vitalybuka Subscribers: #sanitizers, llvm-commits Tags: #sanitizers, #llvm Differential Revision: https://reviews.llvm.org/D74802
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
// RUN: %clang_tsan %darwin_min_target_with_tls_support %s -o %t
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// RUN: %clang_tsan %darwin_min_target_with_tls_support %s -DBUILD_SO -fPIC -o \
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// RUN: %t-so.so -shared
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// RUN: %run %t 2>&1 | FileCheck %s
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// XFAIL: netbsd
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// Test that tsan cleans up dynamic TLS memory between reuse.
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#include "test.h"
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#ifndef BUILD_SO
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#include <assert.h>
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#include <dlfcn.h>
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typedef volatile long *(* get_t)();
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get_t GetTls;
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void *Thread1(void *arg) {
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pthread_detach(pthread_self());
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volatile long *x = GetTls();
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*x = 42;
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fprintf(stderr, "stack: %p dtls: %p\n", &x, x);
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barrier_wait(&barrier);
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return 0;
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}
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void *Thread2(void *arg) {
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volatile long *x = GetTls();
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*x = 42;
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fprintf(stderr, "stack: %p dtls: %p\n", &x, x);
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return 0;
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}
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int main(int argc, char *argv[]) {
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char path[4096];
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snprintf(path, sizeof(path), "%s-so.so", argv[0]);
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void *handle = dlopen(path, RTLD_LAZY);
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if (!handle) fprintf(stderr, "%s\n", dlerror());
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assert(handle != 0);
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GetTls = (get_t)dlsym(handle, "GetTls");
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assert(dlerror() == 0);
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barrier_init(&barrier, 2);
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pthread_t t[2];
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pthread_create(&t[0], 0, Thread1, 0);
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barrier_wait(&barrier);
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// Wait for actual thread termination without using pthread_join,
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// which would synchronize threads.
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sleep(1);
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pthread_create(&t[1], 0, Thread2, 0);
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pthread_join(t[1], 0);
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fprintf(stderr, "DONE\n");
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return 0;
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}
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#else // BUILD_SO
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__thread long huge_thread_local_array[1 << 17];
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long *GetTls() {
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return &huge_thread_local_array[0];
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}
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#endif
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// CHECK-NOT: ThreadSanitizer: data race
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// CHECK: DONE
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