89 lines
3 KiB
C++
89 lines
3 KiB
C++
// RUN: %clangxx_tsan %s -o %t
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// RUN: %deflake %run %t 2>&1 | FileCheck %s
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#include <dlfcn.h>
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#include <thread>
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#import "../test.h"
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extern "C" {
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int __tsan_get_report_data(void *report, const char **description, int *count,
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int *stack_count, int *mop_count, int *loc_count,
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int *mutex_count, int *thread_count,
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int *unique_tid_count, void **sleep_trace,
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unsigned long trace_size);
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int __tsan_get_report_tag(void *report, unsigned long *tag);
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int __tsan_get_report_mop(void *report, unsigned long idx, int *tid, void **addr,
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int *size, int *write, int *atomic, void **trace,
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unsigned long trace_size);
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}
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__attribute__((no_sanitize("thread"), noinline))
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void ExternalWrite(void *addr) {
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void *kSwiftAccessRaceTag = (void *)0x1;
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__tsan_external_write(addr, nullptr, kSwiftAccessRaceTag);
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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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fprintf(stderr, "Start.\n");
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// CHECK: Start.
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void *opaque_object = malloc(16);
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std::thread t1([opaque_object] {
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ExternalWrite(opaque_object);
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barrier_wait(&barrier);
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});
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std::thread t2([opaque_object] {
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barrier_wait(&barrier);
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ExternalWrite(opaque_object);
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});
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// CHECK: WARNING: ThreadSanitizer: Swift access race
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// CHECK: Modifying access of Swift variable at {{.*}} by thread {{.*}}
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// CHECK: #0 ExternalWrite
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// CHECK: Previous modifying access of Swift variable at {{.*}} by thread {{.*}}
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// CHECK: #0 ExternalWrite
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// CHECK: SUMMARY: ThreadSanitizer: Swift access race
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t1.join();
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t2.join();
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fprintf(stderr, "Done.\n");
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}
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extern "C" __attribute__((disable_sanitizer_instrumentation)) void
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__tsan_on_report(void *report) {
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const char *description;
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int count;
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int stack_count, mop_count, loc_count, mutex_count, thread_count,
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unique_tid_count;
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void *sleep_trace[16] = {0};
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__tsan_get_report_data(report, &description, &count, &stack_count, &mop_count,
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&loc_count, &mutex_count, &thread_count,
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&unique_tid_count, sleep_trace, 16);
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fprintf(stderr, "report type = '%s', count = %d, mop_count = %d\n", description, count, mop_count);
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// CHECK: report type = 'external-race', count = 0, mop_count = 2
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unsigned long tag;
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__tsan_get_report_tag(report, &tag);
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fprintf(stderr, "tag = %ld\n", tag);
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// CHECK: tag = 1
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int tid, size, write, atomic;
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void *addr;
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void *trace[16] = {0};
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__tsan_get_report_mop(report, /*idx=*/0, &tid, &addr, &size, &write, &atomic,
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trace, 16);
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fprintf(stderr, "Racy write trace (1 of 2):\n");
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for (int i = 0; i < 16 && trace[i]; i++) {
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Dl_info info;
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dladdr(trace[i], &info);
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fprintf(stderr, " %d: frame: %p, function: %p %s\n", i, trace[i],
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info.dli_saddr, info.dli_sname);
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}
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// Ensure ExternalWrite() function is top of trace
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// CHECK: 0: frame: 0x{{[0-9a-z]+}}, function: 0x{{[0-9a-z]+}} _Z13ExternalWritePv
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}
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// CHECK: Done.
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// CHECK: ThreadSanitizer: reported 1 warnings
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