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[tsan] Properly describe GCD worker threads in reports
When dealing with GCD worker threads, TSan currently prints weird things like "created by thread T-1" and "[failed to restore the stack]" in reports. This patch avoids that and instead prints "Thread T3 (...) is a GCD worker thread". Differential Revision: https://reviews.llvm.org/D29103 llvm-svn: 293882
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,43 @@ | ||
// RUN: %clang_tsan %s -o %t -framework Foundation | ||
// RUN: %deflake %run %t 2>&1 | FileCheck %s | ||
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#import <Foundation/Foundation.h> | ||
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#import "../test.h" | ||
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long global; | ||
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int main() { | ||
fprintf(stderr, "Hello world.\n"); | ||
print_address("addr=", 1, &global); | ||
barrier_init(&barrier, 2); | ||
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global = 42; | ||
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ | ||
global = 43; | ||
barrier_wait(&barrier); | ||
}); | ||
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ | ||
barrier_wait(&barrier); | ||
global = 44; | ||
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dispatch_sync(dispatch_get_main_queue(), ^{ | ||
CFRunLoopStop(CFRunLoopGetCurrent()); | ||
}); | ||
}); | ||
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CFRunLoopRun(); | ||
fprintf(stderr, "Done.\n"); | ||
} | ||
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// CHECK: Hello world. | ||
// CHECK: WARNING: ThreadSanitizer: data race | ||
// CHECK: Write of size 8 | ||
// CHECK: Previous write of size 8 | ||
// CHECK: Location is global | ||
// CHECK: Thread {{.*}} is a GCD worker thread | ||
// CHECK-NOT: failed to restore the stack | ||
// CHECK: Thread {{.*}} is a GCD worker thread | ||
// CHECK-NOT: failed to restore the stack | ||
// CHECK: Done. |