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md5: ad1d36cf8bac1dcbc29eceb22776f5ac
Issue Description:
this simple program (which should run TSan clean but doesn't on 4.1 (SR-7582)) now just crashes on the latest swift master dev snapshot:
import Dispatch var a: Int = 0 let q = DispatchQueue(label: "q") q.async { a += 1 } let aViaThread = q.sync { () -> Int in a += 1 return a } print(aViaThread)
see here what happens when compiled (with TSan, works fine without) & run:
$ /usr/local/swift/swift-DEVELOPMENT-SNAPSHOT-2018-04-25-a-ubuntu16.04/usr/bin/swiftc -sanitize=thread test.swift jweiss:/tmp $ ./test Segmentation fault (core dumped) -SEGV- jweiss:/tmp $ /usr/local/swift/swift-DEVELOPMENT-SNAPSHOT-2018-04-25-a-ubuntu16.04/usr/bin/lldb ./test (lldb) target create "./test" Current executable set to './test' (x86_64). (lldb) run Process 32445 launched: './test' (x86_64) Process 32445 stopped * thread #​1, name = 'test', stop reason = signal SIGSEGV: invalid address (fault address: 0x0) frame #​0: 0x0000000000000000 error: memory read failed for 0x0 Target 0: (test) stopped. (lldb) bt * thread #​1, name = 'test', stop reason = signal SIGSEGV: invalid address (fault address: 0x0) * frame #​0: 0x0000000000000000 frame #​1: 0x00005555555d6bab test`::MonotonicNanoTime() at sanitizer_linux_libcdep.cc:754 frame #​2: 0x00005555555b0648 test`::PopulateFreeArray() at sanitizer_allocator_primary64.h:700 frame #​3: 0x00005555555b0235 test`::GetFromAllocator() at sanitizer_allocator_primary64.h:136 frame #​4: 0x00005555555afe99 test`::Refill() at sanitizer_allocator_local_cache.h:111 frame #​5: 0x00005555555afb47 test`::Allocate() at sanitizer_allocator_local_cache.h:47 frame #​6: 0x00005555555ad4a3 test`::Allocate() at sanitizer_allocator_combined.h:62 frame #​7: 0x00005555555ac627 test`::user_alloc_internal() at tsan_mman.cc:157 frame #​8: 0x00005555555acb17 test`::user_calloc() at tsan_mman.cc:183 frame #​9: 0x000055555556018c test`::__interceptor_calloc() at tsan_interceptors.cc:684 frame #​10: 0x00007ffff6f29627 (lldb)
The text was updated successfully, but these errors were encountered:
cc @kubamracek
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Additional Detail from JIRA
md5: ad1d36cf8bac1dcbc29eceb22776f5ac
Issue Description:
this simple program (which should run TSan clean but doesn't on 4.1 (SR-7582)) now just crashes on the latest swift master dev snapshot:
see here what happens when compiled (with TSan, works fine without) & run:
The text was updated successfully, but these errors were encountered: