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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - lld-linked dylib causes crash related to TLV and weak visibility"
href="https://bugs.llvm.org/show_bug.cgi?id=50769">50769</a>
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<th>Summary</th>
<td>lld-linked dylib causes crash related to TLV and weak visibility
</td>
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<th>Product</th>
<td>lld
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>MachO
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>nicolasweber@gmx.de
</td>
</tr>
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<th>CC</th>
<td>gkm@fb.com, jezreel@gmail.com, llvm-bugs@lists.llvm.org, smeenai@fb.com
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<pre>repro:
<a href="https://drive.google.com/file/d/1ltewPgQCgRrznXHPnLiLx8lsYk8CfdRC/view?usp=sharing">https://drive.google.com/file/d/1ltewPgQCgRrznXHPnLiLx8lsYk8CfdRC/view?usp=sharing</a>
The repro file links libabsl.dylib , the other binaries are prebuilt.
% ld @response.txt
% ./gl_unittests --gtest_filter=GLSurfaceEGLTest.SurfaceFormatTest
--single-process-tests
=> passes
Same with ld64.lld crashes:
% ./gl_unittests --gtest_filter=GLSurfaceEGLTest.SurfaceFormatTest
--single-process-tests
[94027:775:ERROR:icu_util.cc(179)] icudtl.dat not found in bundle
[94027:775:ERROR:icu_util.cc(243)] Invalid file descriptor to ICU data
received.
Note: Google Test filter = GLSurfaceEGLTest.SurfaceFormatTest
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from GLSurfaceEGLTest
[ RUN ] GLSurfaceEGLTest.SurfaceFormatTest
Received signal 11 <unknown> 000000000000
0 libbase.dylib 0x00000001060af32f
base::debug::CollectStackTrace(void**, unsigned long) + 31
1 libbase.dylib 0x0000000105d9e0d8
base::debug::StackTrace::StackTrace(unsigned long) + 72
2 libbase.dylib 0x0000000105d9e15d
base::debug::StackTrace::StackTrace(unsigned long) + 29
3 libbase.dylib 0x0000000105d9e135
base::debug::StackTrace::StackTrace() + 37
4 libbase.dylib 0x00000001060af1d3
base::debug::(anonymous namespace)::StackDumpSignalHandler(int, __siginfo*,
void*) + 1331
5 libsystem_platform.dylib 0x00007fff728d25fd _sigtramp + 29
6 ??? 0x0000000000000000 0x0 + 0
7 libabsl.dylib 0x0000000108340936
absl::container_internal::ShouldInsertBackwards(unsigned long, signed char*) +
38
8 libGLESv2.dylib 0x000000011dacdc2b
absl::container_internal::find_first_non_full(signed char*, unsigned long,
unsigned long) + 219
That code is this thread_local:
<a href="https://source.chromium.org/chromium/chromium/src/+/main:third_party/abseil-cpp/absl/container/internal/raw_hash_set.cc;l=31?q=raw_hash_set.cc">https://source.chromium.org/chromium/chromium/src/+/main:third_party/abseil-cpp/absl/container/internal/raw_hash_set.cc;l=31?q=raw_hash_set.cc</a>
(We go down the ABSL_HAVE_THREAD_LOCAL branch)
libabsl.dylib is built with default visibility. All the other binaries were
built with -fvisibility=hidden. If we build the absl code with
-fvisibility-inlines-hidden, the crash goes away.
Downstrem bug: <a href="https://bugs.chromium.org/p/chromium/issues/detail?id=1220100">https://bugs.chromium.org/p/chromium/issues/detail?id=1220100</a></pre>
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