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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - TestMultipleSimultaneousDebuggers fails non-deterministically"
href="https://bugs.llvm.org/show_bug.cgi?id=36711">36711</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>TestMultipleSimultaneousDebuggers fails non-deterministically
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>lldb-dev@lists.llvm.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>vsk@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
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<pre>Jim Ingham encountered the following crash while running this test:
(lldb) bt
* thread #17, name = '<lldb.process.internal-state(pid=62723)>', stop reason =
EXC_BAD_ACCESS (code=1, address=0xeb02)
* frame #0: 0x0000000108432270
LLDB`lldb_private::ConstString::operator==(lldb_private::ConstString const&)
const at ConstString.h:175
frame #1: 0x00000001073df6f0
LLDB`lldb_private::SectionList::FindSectionByName(lldb_private::ConstString
const&) const at Section.cpp:394
frame #2: 0x00000001073df8e0
LLDB`lldb_private::SectionList::FindSectionByName(lldb_private::ConstString
const&) const at Section.cpp:398
frame #3: 0x000000010773d2c3
LLDB`lldb_private::DynamicLoaderDarwin::UpdateImageLoadAddress(lldb_private::Module*,
lldb_private::DynamicLoaderDarwin::ImageInfo&) at DynamicLoaderDarwin.cpp:242
frame #4: 0x00000001077444fe
LLDB`lldb_private::DynamicLoaderDarwin::AddModulesUsingImageInfos(std::__1::vector<lldb_private::DynamicLoaderDarwin::ImageInfo,
std::__1::allocator<lldb_private::DynamicLoaderDarwin::ImageInfo> >&) at
DynamicLoaderDarwin.cpp:677
frame #5: 0x00000001077a4b19
LLDB`DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress(unsigned long
long, unsigned int) at DynamicLoaderMacOSXDYLD.cpp:574
frame #6: 0x00000001077a33f8
LLDB`DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos() at
DynamicLoaderMacOSXDYLD.cpp:742
frame #7: 0x00000001077a3b1b
LLDB`DynamicLoaderMacOSXDYLD::NotifyBreakpointHit(void*,
lldb_private::StoppointCallbackContext*, unsigned long long, unsigned long
long) at DynamicLoaderMacOSXDYLD.cpp:352
frame #8: 0x000000010701ce69
LLDB`lldb_private::BreakpointOptions::InvokeCallback(lldb_private::StoppointCallbackContext*,
unsigned long long, unsigned long long) at BreakpointOptions.cpp:372
frame #9: 0x0000000106fc68c4
LLDB`lldb_private::Breakpoint::InvokeCallback(lldb_private::StoppointCallbackContext*,
int) at Breakpoint.cpp:444
frame #10: 0x0000000107005720
LLDB`lldb_private::BreakpointLocation::InvokeCallback(lldb_private::StoppointCallbackContext*)
at BreakpointLocation.cpp:167
frame #11: 0x00000001070071d6
LLDB`lldb_private::BreakpointLocation::ShouldStop(lldb_private::StoppointCallbackContext*)
at BreakpointLocation.cpp:382
frame #12: 0x000000010700b588
LLDB`lldb_private::BreakpointLocationCollection::ShouldStop(lldb_private::StoppointCallbackContext*)
at BreakpointLocationCollection.cpp:136
frame #13: 0x000000010704615b
LLDB`lldb_private::BreakpointSite::ShouldStop(lldb_private::StoppointCallbackContext*)
at BreakpointSite.cpp:58
frame #14: 0x0000000107dc974d
LLDB`lldb_private::StopInfoBreakpoint::ShouldStopSynchronous(lldb_private::Event*)
at StopInfo.cpp:155
frame #15: 0x0000000107e3ee5c
LLDB`lldb_private::Thread::ShouldStop(lldb_private::Event*) at Thread.cpp:772
frame #16: 0x0000000107e5a036
LLDB`lldb_private::ThreadList::ShouldStop(lldb_private::Event*) at
ThreadList.cpp:329
frame #17: 0x0000000107d4d59f
LLDB`lldb_private::Process::ShouldBroadcastEvent(lldb_private::Event*) at
Process.cpp:3810
frame #18: 0x0000000107d4532b
LLDB`lldb_private::Process::HandlePrivateEvent(std::__1::shared_ptr<lldb_private::Event>&)
at Process.cpp:4037
frame #19: 0x0000000107d4eda7
LLDB`lldb_private::Process::RunPrivateStateThread(bool) at Process.cpp:4236
frame #20: 0x0000000107d4da04
LLDB`lldb_private::Process::PrivateStateThread(void*) at Process.cpp:4129
frame #21: 0x0000000107c9fd44
LLDB`lldb_private::HostNativeThreadBase::ThreadCreateTrampoline(void*) at
HostNativeThreadBase.cpp:65
frame #22: 0x0000000107f6f4c0
LLDB`lldb_private::HostThreadMacOSX::ThreadCreateTrampoline(void*) at
HostThreadMacOSX.mm:69
frame #23: 0x00007fff9b9c7aab libsystem_pthread.dylib`_pthread_body
frame #24: 0x00007fff9b9c79f7 libsystem_pthread.dylib`_pthread_start
frame #25: 0x00007fff9b9c71fd libsystem_pthread.dylib`thread_start
According to Jim's analysis, it's possible that this is due to a race condition
in handling shared library loading.</pre>
</div>
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