Bump the github-actions group across 1 directory with 9 updates #7
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Bumps the github-actions group with 9 updates in the / directory: | Package | From | To | | --- | --- | --- | | [actions/checkout](https://github.com/actions/checkout) | `3.1.0` | `4.1.7` | | [actions/upload-artifact](https://github.com/actions/upload-artifact) | `3` | `4` | | [actions/download-artifact](https://github.com/actions/download-artifact) | `3` | `4` | | [tj-actions/changed-files](https://github.com/tj-actions/changed-files) | `39` | `44` | | [actions/github-script](https://github.com/actions/github-script) | `3` | `7` | | [actions/labeler](https://github.com/actions/labeler) | `4` | `5` | | [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) | `1.0.0` | `1.4.0` | | [ossf/scorecard-action](https://github.com/ossf/scorecard-action) | `2.3.1` | `2.4.0` | | [github/codeql-action](https://github.com/github/codeql-action) | `2.2.4` | `3.25.15` | Updates `actions/checkout` from 3.1.0 to 4.1.7 - [Release notes](https://github.com/actions/checkout/releases) - [Commits](actions/checkout@v3.1.0...v4.1.7) Updates `actions/upload-artifact` from 3 to 4 - [Release notes](https://github.com/actions/upload-artifact/releases) - [Commits](actions/upload-artifact@v3...v4) Updates `actions/download-artifact` from 3 to 4 - [Release notes](https://github.com/actions/download-artifact/releases) - [Commits](actions/download-artifact@v3...v4) Updates `tj-actions/changed-files` from 39 to 44 - [Release notes](https://github.com/tj-actions/changed-files/releases) - [Changelog](https://github.com/tj-actions/changed-files/blob/main/HISTORY.md) - [Commits](tj-actions/changed-files@v39...v44) Updates `actions/github-script` from 3 to 7 - [Release notes](https://github.com/actions/github-script/releases) - [Commits](actions/github-script@v3...v7) Updates `actions/labeler` from 4 to 5 - [Release notes](https://github.com/actions/labeler/releases) - [Commits](actions/labeler@v4...v5) Updates `actions/attest-build-provenance` from 1.0.0 to 1.4.0 - [Release notes](https://github.com/actions/attest-build-provenance/releases) - [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md) - [Commits](actions/attest-build-provenance@897ed5e...210c191) Updates `ossf/scorecard-action` from 2.3.1 to 2.4.0 - [Release notes](https://github.com/ossf/scorecard-action/releases) - [Changelog](https://github.com/ossf/scorecard-action/blob/main/RELEASE.md) - [Commits](ossf/scorecard-action@0864cf1...62b2cac) Updates `github/codeql-action` from 2.2.4 to 3.25.15 - [Release notes](https://github.com/github/codeql-action/releases) - [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md) - [Commits](github/codeql-action@17573ee...afb54ba) --- updated-dependencies: - dependency-name: actions/checkout dependency-type: direct:production update-type: version-update:semver-major dependency-group: github-actions - dependency-name: actions/upload-artifact dependency-type: direct:production update-type: version-update:semver-major dependency-group: github-actions - dependency-name: actions/download-artifact dependency-type: direct:production update-type: version-update:semver-major dependency-group: github-actions - dependency-name: tj-actions/changed-files dependency-type: direct:production update-type: version-update:semver-major dependency-group: github-actions - dependency-name: actions/github-script dependency-type: direct:production update-type: version-update:semver-major dependency-group: github-actions - dependency-name: actions/labeler dependency-type: direct:production update-type: version-update:semver-major dependency-group: github-actions - dependency-name: actions/attest-build-provenance dependency-type: direct:production update-type: version-update:semver-minor dependency-group: github-actions - dependency-name: ossf/scorecard-action dependency-type: direct:production update-type: version-update:semver-minor dependency-group: github-actions - dependency-name: github/codeql-action dependency-type: direct:production update-type: version-update:semver-major dependency-group: github-actions ... Signed-off-by: dependabot[bot] <[email protected]>
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Compilers and language runtimes often use helper functions that are fundamentally uninteresting when debugging anything but the compiler/runtime itself. This patch introduces a user-extensible mechanism that allows for these frames to be hidden from backtraces and automatically skipped over when navigating the stack with `up` and `down`. This does not affect the numbering of frames, so `f <N>` will still provide access to the hidden frames. The `bt` output will also print a hint that frames have been hidden. My primary motivation for this feature is to hide thunks in the Swift programming language, but I'm including an example recognizer for `std::function::operator()` that I wished for myself many times while debugging LLDB. rdar://126629381 Example output. (Yes, my proof-of-concept recognizer could hide even more frames if we had a method that returned the function name without the return type or I used something that isn't based off regex, but it's really only meant as an example). before: ``` (lldb) thread backtrace --filtered=false * thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1 * frame #0: 0x0000000100001f04 a.out`foo(x=1, y=1) at main.cpp:4:10 frame #1: 0x0000000100003a00 a.out`decltype(std::declval<int (*&)(int, int)>()(std::declval<int>(), std::declval<int>())) std::__1::__invoke[abi:se200000]<int (*&)(int, int), int, int>(__f=0x000000016fdff280, __args=0x000000016fdff224, __args=0x000000016fdff220) at invoke.h:149:25 frame #2: 0x000000010000399c a.out`int std::__1::__invoke_void_return_wrapper<int, false>::__call[abi:se200000]<int (*&)(int, int), int, int>(__args=0x000000016fdff280, __args=0x000000016fdff224, __args=0x000000016fdff220) at invoke.h:216:12 frame #3: 0x0000000100003968 a.out`std::__1::__function::__alloc_func<int (*)(int, int), std::__1::allocator<int (*)(int, int)>, int (int, int)>::operator()[abi:se200000](this=0x000000016fdff280, __arg=0x000000016fdff224, __arg=0x000000016fdff220) at function.h:171:12 frame #4: 0x00000001000026bc a.out`std::__1::__function::__func<int (*)(int, int), std::__1::allocator<int (*)(int, int)>, int (int, int)>::operator()(this=0x000000016fdff278, __arg=0x000000016fdff224, __arg=0x000000016fdff220) at function.h:313:10 frame #5: 0x0000000100003c38 a.out`std::__1::__function::__value_func<int (int, int)>::operator()[abi:se200000](this=0x000000016fdff278, __args=0x000000016fdff224, __args=0x000000016fdff220) const at function.h:430:12 frame #6: 0x0000000100002038 a.out`std::__1::function<int (int, int)>::operator()(this= Function = foo(int, int) , __arg=1, __arg=1) const at function.h:989:10 frame #7: 0x0000000100001f64 a.out`main(argc=1, argv=0x000000016fdff4f8) at main.cpp:9:10 frame #8: 0x0000000183cdf154 dyld`start + 2476 (lldb) ``` after ``` (lldb) bt * thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1 * frame #0: 0x0000000100001f04 a.out`foo(x=1, y=1) at main.cpp:4:10 frame #1: 0x0000000100003a00 a.out`decltype(std::declval<int (*&)(int, int)>()(std::declval<int>(), std::declval<int>())) std::__1::__invoke[abi:se200000]<int (*&)(int, int), int, int>(__f=0x000000016fdff280, __args=0x000000016fdff224, __args=0x000000016fdff220) at invoke.h:149:25 frame #2: 0x000000010000399c a.out`int std::__1::__invoke_void_return_wrapper<int, false>::__call[abi:se200000]<int (*&)(int, int), int, int>(__args=0x000000016fdff280, __args=0x000000016fdff224, __args=0x000000016fdff220) at invoke.h:216:12 frame #6: 0x0000000100002038 a.out`std::__1::function<int (int, int)>::operator()(this= Function = foo(int, int) , __arg=1, __arg=1) const at function.h:989:10 frame #7: 0x0000000100001f64 a.out`main(argc=1, argv=0x000000016fdff4f8) at main.cpp:9:10 frame #8: 0x0000000183cdf154 dyld`start + 2476 Note: Some frames were hidden by frame recognizers ```
|
Superseded by #9. |
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…107294)
Random testing revealed it's possible to crash the analyzer with the
command line invocation:
clang -cc1 -analyze -analyzer-checker=nullability empty.c
where the source file, empty.c is an empty source file.
```
clang: <root>/clang/lib/StaticAnalyzer/Core/CheckerManager.cpp:56:
void clang::ento::CheckerManager::finishedCheckerRegistration():
Assertion `Event.second.HasDispatcher && "No dispatcher registered for an event"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/
Stack dump:
0. Program arguments: clang -cc1 -analyze -analyzer-checker=nullability nullability-nocrash.c
#0 ...
...
#7 <addr> clang::ento::CheckerManager::finishedCheckerRegistration()
#8 <addr> clang::ento::CheckerManager::CheckerManager(clang::ASTContext&,
clang::AnalyzerOptions&, clang::Preprocessor const&,
llvm::ArrayRef<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char>>>, llvm::ArrayRef<std::function<void (clang::ento::CheckerRegistry&)>>)
```
This commit removes the assertion which failed here, because it was
logically incorrect: it required that if an Event is handled by some
(enabled) checker, then there must be an **enabled** checker which can
emit that kind of Event. It should be OK to disable the event-producing
checkers but enable an event-consuming checker which has different
responsibilities in addition to handling the events.
Note that this assertion was in an `#ifndef NDEBUG` block, so this
change does not impact the non-debug builds.
Co-authored-by: Vince Bridgers <[email protected]>
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## Description This PR fixes a segmentation fault that occurs when passing options requiring arguments via `-Xopenmp-target=<triple>`. The issue was that the function `Driver::getOffloadArchs` did not properly parse the extracted option, but instead assumed it was valid, leading to a crash when incomplete arguments were provided. ## Backtrace ```sh llvm-project/build/bin/clang++ main.cpp -fopenmp=libomp -fopenmp-targets=powerpc64le-ibm-linux-gnu -Xopenmp-target=powerpc64le-ibm-linux-gnu -o PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script. Stack dump: 0. Program arguments: llvm-project/build/bin/clang++ main.cpp -fopenmp=libomp -fopenmp-targets=powerpc64le-ibm-linux-gnu -Xopenmp-target=powerpc64le-ibm-linux-gnu -o 1. Compilation construction 2. Building compilation actions #0 0x0000562fb21c363b llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (llvm-project/build/bin/clang+++0x392f63b) #1 0x0000562fb21c0e3c SignalHandler(int) Signals.cpp:0:0 #2 0x00007fcbf6c81420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420) #3 0x0000562fb1fa5d70 llvm::opt::Option::matches(llvm::opt::OptSpecifier) const (llvm-project/build/bin/clang+++0x3711d70) #4 0x0000562fb2a78e7d clang::driver::Driver::getOffloadArchs(clang::driver::Compilation&, llvm::opt::DerivedArgList const&, clang::driver::Action::OffloadKind, clang::driver::ToolChain const*, bool) const (llvm-project/build/bin/clang+++0x41e4e7d) #5 0x0000562fb2a7a9aa clang::driver::Driver::BuildOffloadingActions(clang::driver::Compilation&, llvm::opt::DerivedArgList&, std::pair<clang::driver::types::ID, llvm::opt::Arg const*> const&, clang::driver::Action*) const (.part.1164) Driver.cpp:0:0 #6 0x0000562fb2a7c093 clang::driver::Driver::BuildActions(clang::driver::Compilation&, llvm::opt::DerivedArgList&, llvm::SmallVector<std::pair<clang::driver::types::ID, llvm::opt::Arg const*>, 16u> const&, llvm::SmallVector<clang::driver::Action*, 3u>&) const (llvm-project/build/bin/clang+++0x41e8093) #7 0x0000562fb2a8395d clang::driver::Driver::BuildCompilation(llvm::ArrayRef<char const*>) (llvm-project/build/bin/clang+++0x41ef95d) #8 0x0000562faf92684c clang_main(int, char**, llvm::ToolContext const&) (llvm-project/build/bin/clang+++0x109284c) #9 0x0000562faf826cc6 main (llvm-project/build/bin/clang+++0xf92cc6) #10 0x00007fcbf6699083 __libc_start_main /build/glibc-LcI20x/glibc-2.31/csu/../csu/libc-start.c:342:3 #11 0x0000562faf923a5e _start (llvm-project/build/bin/clang+++0x108fa5e) [1] 2628042 segmentation fault (core dumped) main.cpp -fopenmp=libomp -fopenmp-targets=powerpc64le-ibm-linux-gnu -o ```
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…ible (#123752) This patch adds a new option `-aarch64-enable-zpr-predicate-spills` (which is disabled by default), this option replaces predicate spills with vector spills in streaming[-compatible] functions. For example: ``` str p8, [sp, #7, mul vl] // 2-byte Folded Spill // ... ldr p8, [sp, #7, mul vl] // 2-byte Folded Reload ``` Becomes: ``` mov z0.b, p8/z, #1 str z0, [sp] // 16-byte Folded Spill // ... ldr z0, [sp] // 16-byte Folded Reload ptrue p4.b cmpne p8.b, p4/z, z0.b, #0 ``` This is done to avoid streaming memory hazards between FPR/vector and predicate spills, which currently occupy the same stack area even when the `-aarch64-stack-hazard-size` flag is set. This is implemented with two new pseudos SPILL_PPR_TO_ZPR_SLOT_PSEUDO and FILL_PPR_FROM_ZPR_SLOT_PSEUDO. The expansion of these pseudos handles scavenging the required registers (z0 in the above example) and, in the worst case spilling a register to an emergency stack slot in the expansion. The condition flags are also preserved around the `cmpne` in case they are live at the expansion point.
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…ctor-bits=128." (#134997) Reverts llvm/llvm-project#134068 Caused a stage 2 build failure: https://lab.llvm.org/buildbot/#/builders/41/builds/6016 ``` FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/lib/Support -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/include -mcpu=neoverse-512tvb -mllvm -scalable-vectorization=preferred -mllvm -treat-scalable-fixed-error-as-warning=false -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror=global-constructors -O3 -DNDEBUG -std=c++17 -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o -c /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support/Caching.cpp Opcode has unknown scale! UNREACHABLE executed at ../llvm/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp:4530! PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script. Stack dump: 0. Program arguments: /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/lib/Support -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/include -mcpu=neoverse-512tvb -mllvm -scalable-vectorization=preferred -mllvm -treat-scalable-fixed-error-as-warning=false -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror=global-constructors -O3 -DNDEBUG -std=c++17 -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o -c /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support/Caching.cpp 1. <eof> parser at end of file 2. Code generation 3. Running pass 'Function Pass Manager' on module '/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support/Caching.cpp'. 4. Running pass 'AArch64 load / store optimization pass' on function '@"_ZNSt17_Function_handlerIFN4llvm8ExpectedISt8functionIFNS1_ISt10unique_ptrINS0_16CachedFileStreamESt14default_deleteIS4_EEEEjRKNS0_5TwineEEEEEjNS0_9StringRefESB_EZNS0_10localCacheESB_SB_SB_S2_IFvjSB_S3_INS0_12MemoryBufferES5_ISH_EEEEE3$_0E9_M_invokeERKSt9_Any_dataOjOSF_SB_"' #0 0x0000b6eae9b67bf0 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x81c7bf0) #1 0x0000b6eae9b65aec llvm::sys::RunSignalHandlers() (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x81c5aec) #2 0x0000b6eae9acd5f4 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0 #3 0x0000f16c1aff28f8 (linux-vdso.so.1+0x8f8) #4 0x0000f16c1aacf1f0 __pthread_kill_implementation ./nptl/pthread_kill.c:44:76 #5 0x0000f16c1aa8a67c gsignal ./signal/../sysdeps/posix/raise.c:27:6 #6 0x0000f16c1aa77130 abort ./stdlib/abort.c:81:7 #7 0x0000b6eae9ad6628 (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x8136628) #8 0x0000b6eae72e95a8 (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x59495a8) #9 0x0000b6eae74ca9a8 (anonymous namespace)::AArch64LoadStoreOpt::findMatchingInsn(llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>, (anonymous namespace)::LdStPairFlags&, unsigned int, bool) AArch64LoadStoreOptimizer.cpp:0:0 #10 0x0000b6eae74c85a8 (anonymous namespace)::AArch64LoadStoreOpt::tryToPairLdStInst(llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>&) AArch64LoadStoreOptimizer.cpp:0:0 #11 0x0000b6eae74c624c (anonymous namespace)::AArch64LoadStoreOpt::optimizeBlock(llvm::MachineBasicBlock&, bool) AArch64LoadStoreOptimizer.cpp:0:0 #12 0x0000b6eae74c429c (anonymous namespace)::AArch64LoadStoreOpt::runOnMachineFunction(llvm::MachineFunction&) AArch64LoadStoreOptimizer.cpp:0:0 ```
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…reporting (#131756)
### Description
This PR resolves a deadlock between AddressSanitizer (ASan) and
LeakSanitizer (LSan)
that occurs when both sanitizers attempt to acquire locks in conflicting
orders across
threads. The fix ensures safe lock acquisition ordering by preloading
module information
before error reporting.
---
### Issue Details
**Reproducer**
```cpp
// Thread 1: ASan error path
int arr[1] = {0};
std::thread t([&]() {
arr[1] = 1; // Triggers ASan OOB error
});
// Thread 2: LSan check path
__lsan_do_leak_check();
```
**Lock Order Conflict**:
- Thread 1 (ASan error reporting):
1. Acquires ASan thread registry lock (B)
1. Attempts to acquire libdl lock (A) via `dl_iterate_phdr`
- Thread 2 (LSan leak check):
1. Acquires libdl lock (A) via `dl_iterate_phdr`
1. Attempts to acquire ASan thread registry lock (B)
This creates a circular wait condition (A -> B -> A) meeting all four
Coffman deadlock criteria.
---
### Fix Strategy
The root cause lies in ASan's error reporting path needing
`dl_iterate_phdr` (requiring lock A)
while already holding its thread registry lock (B). The solution:
1. **Preload Modules Early**: Force module list initialization _before_
acquiring ASan's thread lock
2. **Avoid Nested Locking**: Ensure symbolization (via dl_iterate_phdr)
completes before error reporting locks
Key code change:
```cpp
// Before acquiring ASan's thread registry lock:
Symbolizer::GetOrInit()->GetRefreshedListOfModules();
```
This guarantees module information is cached before lock acquisition,
eliminating
the need for `dl_iterate_phdr` calls during error reporting.
---
### Testing
Added **asan_lsan_deadlock.cpp** test case:
- Reproduces deadlock reliably without fix **under idle system
conditions**
- Uses watchdog thread to detect hangs
- Verifies ASan error reports correctly without deadlock
**Note**: Due to the inherent non-determinism of thread scheduling and
lock acquisition timing,
this test may not reliably reproduce the deadlock on busy systems (e.g.,
during parallel
`ninja check-asan` runs).
---
### Impact
- Fixes rare but severe deadlocks in mixed ASan+LSan environments
- Maintains thread safety guarantees for both sanitizers
- No user-visible behavior changes except deadlock elimination
---
### Relevant Buggy Code
- Code in ASan's asan_report.cpp
```cpp
explicit ScopedInErrorReport(bool fatal = false)
: halt_on_error_(fatal || flags()->halt_on_error) {
// Acquire lock B
asanThreadRegistry().Lock();
}
~ScopedInErrorReport() {
...
// Try to acquire lock A under holding lock B via the following path
// #4 0x000071a353d83e93 in __GI___dl_iterate_phdr (
// callback=0x5d1a07a39580 <__sanitizer::dl_iterate_phdr_cb(dl_phdr_info*, unsigned long, void*)>,
// data=0x6da3510fd3f0) at ./elf/dl-iteratephdr.c:39
// #5 0x00005d1a07a39574 in __sanitizer::ListOfModules::init (this=0x71a353ebc080)
// at llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp:784
// #6 0x00005d1a07a429e3 in __sanitizer::Symbolizer::RefreshModules (this=0x71a353ebc058)
// at llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp:188
// #7 __sanitizer::Symbolizer::FindModuleForAddress (this=this@entry=0x71a353ebc058,
// address=address@entry=102366378805727)
// at llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp:214
// #8 0x00005d1a07a4291b in __sanitizer::Symbolizer::SymbolizePC (this=0x71a353ebc058, addr=102366378805727)
// at llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp:88
// #9 0x00005d1a07a40df7 in __sanitizer::(anonymous namespace)::StackTraceTextPrinter::ProcessAddressFrames (
// this=this@entry=0x6da3510fd520, pc=102366378805727)
// at llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cpp:37
// #10 0x00005d1a07a40d27 in __sanitizer::StackTrace::PrintTo (this=this@entry=0x6da3510fd5e8,
// output=output@entry=0x6da3510fd588)
// at llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cpp:110
// #11 0x00005d1a07a410a1 in __sanitizer::StackTrace::Print (this=0x6da3510fd5e8)
// at llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cpp:133
// #12 0x00005d1a0798758d in __asan::ErrorGeneric::Print (
// this=0x5d1a07aa4e08 <__asan::ScopedInErrorReport::current_error_+8>)
// at llvm-project/compiler-rt/lib/asan/asan_errors.cpp:617
current_error_.Print();
...
}
```
- Code in LSan's lsan_common_linux.cpp
```cpp
void LockStuffAndStopTheWorld(StopTheWorldCallback callback,
CheckForLeaksParam *argument) {
// Acquire lock A
dl_iterate_phdr(LockStuffAndStopTheWorldCallback, ¶m);
}
static int LockStuffAndStopTheWorldCallback(struct dl_phdr_info *info,
size_t size, void *data) {
// Try to acquire lock B under holding lock A via the following path
// #3 0x000055555562b34a in __sanitizer::ThreadRegistry::Lock (this=<optimized out>)
// at llvm-project/compiler-rt/lib/asan/../sanitizer_common/sanitizer_thread_registry.h:99
// #4 __lsan::LockThreads () at llvm-project/compiler-rt/lib/asan/asan_thread.cpp:484
// #5 0x0000555555652629 in __lsan::ScopedStopTheWorldLock::ScopedStopTheWorldLock (this=<optimized out>)
// at llvm-project/compiler-rt/lib/lsan/lsan_common.h:164
// #6 __lsan::LockStuffAndStopTheWorldCallback (info=<optimized out>, size=<optimized out>, data=0x0,
// data@entry=0x7fffffffd158) at llvm-project/compiler-rt/lib/lsan/lsan_common_linux.cpp:120
ScopedStopTheWorldLock lock;
DoStopTheWorldParam *param = reinterpret_cast<DoStopTheWorldParam *>(data);
StopTheWorld(param->callback, param->argument);
return 1;
}
```
herobuxx
pushed a commit
that referenced
this pull request
May 1, 2025
…lection (#136795) Fix a [test failure](llvm/llvm-project#136236 (comment)) in #136236, apply a minor renaming of statistics, and remerge. See details below. # Changes in #136236 Currently, `DebuggerStats::ReportStatistics()` calls `Module::GetSymtab(/*can_create=*/false)`, but then the latter calls `SymbolFile::GetSymtab()`. This will load symbols if haven't yet. See stacktrace below. The problem is that `DebuggerStats::ReportStatistics` should be read-only. This is especially important because it reports stats for symtab parsing/indexing time, which could be affected by the reporting itself if it's not read-only. This patch fixes this problem by adding an optional parameter `SymbolFile::GetSymtab(bool can_create = true)` and receiving the `false` value passed down from `Module::GetSymtab(/*can_create=*/false)` when the call is initiated from `DebuggerStats::ReportStatistics()`. --- Notes about the following stacktrace: 1. This can be reproduced. Create a helloworld program on **macOS** with dSYM, add `settings set target.preload-symbols false` to `~/.lldbinit`, do `lldb a.out`, then `statistics dump`. 2. `ObjectFile::GetSymtab` has `llvm::call_once`. So the fact that it called into `ObjectFileMachO::ParseSymtab` means that the symbol table is actually being parsed. ``` (lldb) bt * thread #1, queue = 'com.apple.main-thread', stop reason = step over frame #0: 0x0000000124c4d5a0 LLDB`ObjectFileMachO::ParseSymtab(this=0x0000000111504e40, symtab=0x0000600000a05e00) at ObjectFileMachO.cpp:2259:44 * frame #1: 0x0000000124fc50a0 LLDB`lldb_private::ObjectFile::GetSymtab()::$_0::operator()(this=0x000000016d35c858) const at ObjectFile.cpp:761:9 frame #5: 0x0000000124fc4e68 LLDB`void std::__1::__call_once_proxy[abi:v160006]<std::__1::tuple<lldb_private::ObjectFile::GetSymtab()::$_0&&>>(__vp=0x000000016d35c7f0) at mutex:652:5 frame #6: 0x0000000198afb99c libc++.1.dylib`std::__1::__call_once(unsigned long volatile&, void*, void (*)(void*)) + 196 frame #7: 0x0000000124fc4dd0 LLDB`void std::__1::call_once[abi:v160006]<lldb_private::ObjectFile::GetSymtab()::$_0>(__flag=0x0000600003920080, __func=0x000000016d35c858) at mutex:670:9 frame #8: 0x0000000124fc3cb0 LLDB`void llvm::call_once<lldb_private::ObjectFile::GetSymtab()::$_0>(flag=0x0000600003920080, F=0x000000016d35c858) at Threading.h:88:5 frame #9: 0x0000000124fc2bc4 LLDB`lldb_private::ObjectFile::GetSymtab(this=0x0000000111504e40) at ObjectFile.cpp:755:5 frame #10: 0x0000000124fe0a28 LLDB`lldb_private::SymbolFileCommon::GetSymtab(this=0x0000000104865200) at SymbolFile.cpp:158:39 frame #11: 0x0000000124d8fedc LLDB`lldb_private::Module::GetSymtab(this=0x00000001113041a8, can_create=false) at Module.cpp:1027:21 frame #12: 0x0000000125125bdc LLDB`lldb_private::DebuggerStats::ReportStatistics(debugger=0x000000014284d400, target=0x0000000115808200, options=0x000000014195d6d1) at Statistics.cpp:329:30 frame #13: 0x0000000125672978 LLDB`CommandObjectStatsDump::DoExecute(this=0x000000014195d540, command=0x000000016d35d820, result=0x000000016d35e150) at CommandObjectStats.cpp:144:18 frame #14: 0x0000000124f29b40 LLDB`lldb_private::CommandObjectParsed::Execute(this=0x000000014195d540, args_string="", result=0x000000016d35e150) at CommandObject.cpp:832:9 frame #15: 0x0000000124efbd70 LLDB`lldb_private::CommandInterpreter::HandleCommand(this=0x0000000141b22f30, command_line="statistics dump", lazy_add_to_history=eLazyBoolCalculate, result=0x000000016d35e150, force_repeat_command=false) at CommandInterpreter.cpp:2134:14 frame #16: 0x0000000124f007f4 LLDB`lldb_private::CommandInterpreter::IOHandlerInputComplete(this=0x0000000141b22f30, io_handler=0x00000001419b2aa8, line="statistics dump") at CommandInterpreter.cpp:3251:3 frame #17: 0x0000000124d7b5ec LLDB`lldb_private::IOHandlerEditline::Run(this=0x00000001419b2aa8) at IOHandler.cpp:588:22 frame #18: 0x0000000124d1e8fc LLDB`lldb_private::Debugger::RunIOHandlers(this=0x000000014284d400) at Debugger.cpp:1225:16 frame #19: 0x0000000124f01f74 LLDB`lldb_private::CommandInterpreter::RunCommandInterpreter(this=0x0000000141b22f30, options=0x000000016d35e63c) at CommandInterpreter.cpp:3543:16 frame #20: 0x0000000122840294 LLDB`lldb::SBDebugger::RunCommandInterpreter(this=0x000000016d35ebd8, auto_handle_events=true, spawn_thread=false) at SBDebugger.cpp:1212:42 frame #21: 0x0000000102aa6d28 lldb`Driver::MainLoop(this=0x000000016d35ebb8) at Driver.cpp:621:18 frame #22: 0x0000000102aa75b0 lldb`main(argc=1, argv=0x000000016d35f548) at Driver.cpp:829:26 frame #23: 0x0000000198858274 dyld`start + 2840 ``` # Changes in this PR top of the above Fix a [test failure](llvm/llvm-project#136236 (comment)) in `TestStats.py`. The original version of the added test checks that all modules have symbol count zero when `target.preload-symbols == false`. The test failed on macOS. Due to various reasons, on macOS, symbols can be loaded for dylibs even with that setting, but not for the main module. For now, the fix of the test is to limit the assertion to only the main module. The test now passes on macOS. In the future, when we have a way to control a specific list of plug-ins to be loaded, there may be a configuration that this test can use to assert that all modules have symbol count zero. Apply a minor renaming of statistics, per the [suggestion](llvm/llvm-project#136226 (comment)) in #136226 after merge.
herobuxx
pushed a commit
that referenced
this pull request
May 1, 2025
…mbolConjured" (#137304) Reverts llvm/llvm-project#128251 ASAN bots reported some errors: https://lab.llvm.org/buildbot/#/builders/55/builds/10398 Reverting for investigation. ``` Failed Tests (6): Clang :: Analysis/loop-widening-ignore-static-methods.cpp Clang :: Analysis/loop-widening-notes.cpp Clang :: Analysis/loop-widening-preserve-reference-type.cpp Clang :: Analysis/loop-widening.c Clang :: Analysis/loop-widening.cpp Clang :: Analysis/this-pointer.cpp Testing Time: 411.55s Total Discovered Tests: 118563 Skipped : 33 (0.03%) Unsupported : 2015 (1.70%) Passed : 116291 (98.08%) Expectedly Failed: 218 (0.18%) Failed : 6 (0.01%) FAILED: CMakeFiles/check-all /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/CMakeFiles/check-all cd /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan && /usr/bin/python3 /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/./bin/llvm-lit -sv --param USE_Z3_SOLVER=0 /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/utils/mlgo-utils /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/mlir/test /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/clang/test /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/utils/lit /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/test ninja: build stopped: subcommand failed. ``` ``` /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/21/include -nostdsysteminc -analyze -analyzer-constraints=range -setup-static-analyzer -analyzer-checker=core,unix.Malloc,debug.ExprInspection -analyzer-max-loop 4 -analyzer-config widen-loops=true -verify -analyzer-config eagerly-assume=false /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/Analysis/loop-widening.c # RUN: at line 1 + /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/21/include -nostdsysteminc -analyze -analyzer-constraints=range -setup-static-analyzer -analyzer-checker=core,unix.Malloc,debug.ExprInspection -analyzer-max-loop 4 -analyzer-config widen-loops=true -verify -analyzer-config eagerly-assume=false /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/Analysis/loop-widening.c PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script. Stack dump: 0. Program arguments: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/21/include -nostdsysteminc -analyze -analyzer-constraints=range -setup-static-analyzer -analyzer-checker=core,unix.Malloc,debug.ExprInspection -analyzer-max-loop 4 -analyzer-config widen-loops=true -verify -analyzer-config eagerly-assume=false /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/Analysis/loop-widening.c 1. <eof> parser at end of file 2. While analyzing stack: #0 Calling nested_loop_inner_widen #0 0x0000c894cca289cc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:804:13 #1 0x0000c894cca23324 llvm::sys::RunSignalHandlers() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/lib/Support/Signals.cpp:106:18 #2 0x0000c894cca29bbc SignalHandler(int, siginfo_t*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:0:3 #3 0x0000f6898da4a8f8 (linux-vdso.so.1+0x8f8) #4 0x0000f6898d377608 (/lib/aarch64-linux-gnu/libc.so.6+0x87608) #5 0x0000f6898d32cb3c raise (/lib/aarch64-linux-gnu/libc.so.6+0x3cb3c) #6 0x0000f6898d317e00 abort (/lib/aarch64-linux-gnu/libc.so.6+0x27e00) #7 0x0000c894c5e77fec __sanitizer::Atexit(void (*)()) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp:168:10 #8 0x0000c894c5e76680 __sanitizer::Die() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_termination.cpp:52:5 #9 0x0000c894c5e69650 Unlock /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_mutex.h:250:16 #10 0x0000c894c5e69650 ~GenericScopedLock /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_mutex.h:386:51 #11 0x0000c894c5e69650 __hwasan::ScopedReport::~ScopedReport() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan_report.cpp:54:5 #12 0x0000c894c5e68de0 __hwasan::(anonymous namespace)::BaseReport::~BaseReport() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan_report.cpp:476:7 #13 0x0000c894c5e66b74 __hwasan::ReportTagMismatch(__sanitizer::StackTrace*, unsigned long, unsigned long, bool, bool, unsigned long*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan_report.cpp:1091:1 #14 0x0000c894c5e52cf8 Destroy /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_common.h:532:31 #15 0x0000c894c5e52cf8 ~InternalMmapVector /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_common.h:642:56 #16 0x0000c894c5e52cf8 __hwasan::HandleTagMismatch(__hwasan::AccessInfo, unsigned long, unsigned long, void*, unsigned long*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan.cpp:245:1 #17 0x0000c894c5e551c8 __hwasan_tag_mismatch4 /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/hwasan/hwasan.cpp:764:1 #18 0x0000c894c5e6a2f8 __interception::InterceptFunction(char const*, unsigned long*, unsigned long, unsigned long) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/compiler-rt/lib/interception/interception_linux.cpp:60:0 #19 0x0000c894d166f664 getBlock /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/include/clang/StaticAnalyzer/Core/PathSensitive/CoreEngine.h:217:45 #20 0x0000c894d166f664 getCFGElementRef /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h:230:59 #21 0x0000c894d166f664 clang::ento::ExprEngine::processCFGBlockEntrance(clang::BlockEdge const&, clang::ento::NodeBuilderWithSinks&, clang::ento::ExplodedNode*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp:2570:45 #22 0x0000c894d15f3a1c hasGeneratedNodes /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/include/clang/StaticAnalyzer/Core/PathSensitive/CoreEngine.h:333:37 #23 0x0000c894d15f3a1c clang::ento::CoreEngine::HandleBlockEdge(clang::BlockEdge const&, clang::ento::ExplodedNode*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Core/CoreEngine.cpp:319:20 #24 0x0000c894d15f2c34 clang::ento::CoreEngine::dispatchWorkItem(clang::ento::ExplodedNode*, clang::ProgramPoint, clang::ento::WorkListUnit const&) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Core/CoreEngine.cpp:220:7 #25 0x0000c894d15f2398 operator-> /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_install_hwasan/include/c++/v1/__memory/unique_ptr.h:267:101 #26 0x0000c894d15f2398 clang::ento::CoreEngine::ExecuteWorkList(clang::LocationContext const*, unsigned int, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>)::$_0::operator()(unsigned int) const /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Core/CoreEngine.cpp:140:12 #27 0x0000c894d15f14b4 clang::ento::CoreEngine::ExecuteWorkList(clang::LocationContext const*, unsigned int, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Core/CoreEngine.cpp:165:7 #28 0x0000c894d0ebb9dc release /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/include/llvm/ADT/IntrusiveRefCntPtr.h:232:9 #29 0x0000c894d0ebb9dc ~IntrusiveRefCntPtr /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/include/llvm/ADT/IntrusiveRefCntPtr.h:196:27 #30 0x0000c894d0ebb9dc ExecuteWorkList /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h:192:5 #31 0x0000c894d0ebb9dc RunPathSensitiveChecks /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp:772:7 #32 0x0000c894d0ebb9dc (anonymous namespace)::AnalysisConsumer::HandleCode(clang::Decl*, unsigned int, clang::ento::ExprEngine::InliningModes, llvm::DenseSet<clang::Decl const*, llvm::DenseMapInfo<clang::Decl const*, void>>*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp:741:5 #33 0x0000c894d0eb6ee4 begin /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/include/llvm/ADT/DenseMap.h:0:0 #34 0x0000c894d0eb6ee4 begin /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/include/llvm/ADT/DenseSet.h:187:45 #35 0x0000c894d0eb6ee4 HandleDeclsCallGraph /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp:516:29 #36 0x0000c894d0eb6ee4 runAnalysisOnTranslationUnit /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp:584:5 #37 0x0000c894d0eb6ee4 (anonymous namespace)::AnalysisConsumer::HandleTranslationUnit(clang::ASTContext&) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp:647:3 #38 0x0000c894d18a7a38 clang::ParseAST(clang::Sema&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/Parse/ParseAST.cpp:0:13 #39 0x0000c894ce81ed70 clang::FrontendAction::Execute() /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1231:10 #40 0x0000c894ce6f2144 getPtr /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/include/llvm/Support/Error.h:278:42 #41 0x0000c894ce6f2144 operator bool /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/include/llvm/Support/Error.h:241:16 #42 0x0000c894ce6f2144 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1058:23 #43 0x0000c894cea718cc operator-> /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_install_hwasan/include/c++/v1/__memory/shared_ptr.h:635:12 #44 0x0000c894cea718cc getFrontendOpts /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/include/clang/Frontend/CompilerInstance.h:307:12 #45 0x0000c894cea718cc clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:301:14 #46 0x0000c894c5e9cf28 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/tools/driver/cc1_main.cpp:294:15 #47 0x0000c894c5e92a9c ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/tools/driver/driver.cpp:223:12 #48 0x0000c894c5e902ac clang_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/tools/driver/driver.cpp:0:12 #49 0x0000c894c5eb2e34 main /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/clang/tools/driver/clang-driver.cpp:17:3 #50 0x0000f6898d3184c4 (/lib/aarch64-linux-gnu/libc.so.6+0x284c4) #51 0x0000f6898d318598 __libc_start_main (/lib/aarch64-linux-gnu/libc.so.6+0x28598) #52 0x0000c894c5e52a30 _start (/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang+0x6512a30) /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/clang/test/Analysis/Output/loop-widening.c.script: line 2: 2870204 Aborted /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/lib/clang/21/include -nostdsysteminc -analyze -analyzer-constraints=range -setup-static-analyzer -analyzer-checker=core,unix.Malloc,debug.ExprInspection -analyzer-max-loop 4 -analyzer-config widen-loops=true -verify -analyzer-config eagerly-assume=false /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/clang/test/Analysis/loop-widening.c ```
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`clang-repl --cuda` was previously crashing with a segmentation fault, instead of reporting a clean error ``` (base) anutosh491@Anutoshs-MacBook-Air bin % ./clang-repl --cuda #0 0x0000000111da4fbc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/local/libexec/llvm-20/lib/libLLVM.dylib+0x150fbc) #1 0x0000000111da31dc llvm::sys::RunSignalHandlers() (/opt/local/libexec/llvm-20/lib/libLLVM.dylib+0x14f1dc) #2 0x0000000111da5628 SignalHandler(int) (/opt/local/libexec/llvm-20/lib/libLLVM.dylib+0x151628) #3 0x000000019b242de4 (/usr/lib/system/libsystem_platform.dylib+0x180482de4) #4 0x0000000107f638d0 clang::IncrementalCUDADeviceParser::IncrementalCUDADeviceParser(std::__1::unique_ptr<clang::CompilerInstance, std::__1::default_delete<clang::CompilerInstance>>, clang::CompilerInstance&, llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem>, llvm::Error&, std::__1::list<clang::PartialTranslationUnit, std::__1::allocator<clang::PartialTranslationUnit>> const&) (/opt/local/libexec/llvm-20/lib/libclang-cpp.dylib+0x216b8d0) #5 0x0000000107f638d0 clang::IncrementalCUDADeviceParser::IncrementalCUDADeviceParser(std::__1::unique_ptr<clang::CompilerInstance, std::__1::default_delete<clang::CompilerInstance>>, clang::CompilerInstance&, llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem>, llvm::Error&, std::__1::list<clang::PartialTranslationUnit, std::__1::allocator<clang::PartialTranslationUnit>> const&) (/opt/local/libexec/llvm-20/lib/libclang-cpp.dylib+0x216b8d0) #6 0x0000000107f6bac8 clang::Interpreter::createWithCUDA(std::__1::unique_ptr<clang::CompilerInstance, std::__1::default_delete<clang::CompilerInstance>>, std::__1::unique_ptr<clang::CompilerInstance, std::__1::default_delete<clang::CompilerInstance>>) (/opt/local/libexec/llvm-20/lib/libclang-cpp.dylib+0x2173ac8) #7 0x000000010206f8a8 main (/opt/local/libexec/llvm-20/bin/clang-repl+0x1000038a8) #8 0x000000019ae8c274 Segmentation fault: 11 ``` The underlying issue was that the `DeviceCompilerInstance` (used for device-side CUDA compilation) was never initialized with a `Sema`, which is required before constructing the `IncrementalCUDADeviceParser`. https://github.com/llvm/llvm-project/blob/89687e6f383b742a3c6542dc673a84d9f82d02de/clang/lib/Interpreter/DeviceOffload.cpp#L32 https://github.com/llvm/llvm-project/blob/89687e6f383b742a3c6542dc673a84d9f82d02de/clang/lib/Interpreter/IncrementalParser.cpp#L31 Unlike the host-side `CompilerInstance` which runs `ExecuteAction` inside the Interpreter constructor (thereby setting up Sema), the device-side CI was passed into the parser uninitialized, leading to an assertion or crash when accessing its internals. To fix this, I refactored the `Interpreter::create` method to include an optional `DeviceCI` parameter. If provided, we know we need to take care of this instance too. Only then do we construct the `IncrementalCUDADeviceParser`.
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…e (#138091) Check this error for more context (https://github.com/compiler-research/CppInterOp/actions/runs/14749797085/job/41407625681?pr=491#step:10:531) This fails with ``` * thread #1, name = 'CppInterOpTests', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0x55500356d6d3) * frame #0: 0x00007fffee41cfe3 libclangCppInterOp.so.21.0gitclang::PragmaNamespace::~PragmaNamespace() + 99 frame #1: 0x00007fffee435666 libclangCppInterOp.so.21.0gitclang::Preprocessor::~Preprocessor() + 3830 frame #2: 0x00007fffee20917a libclangCppInterOp.so.21.0gitstd::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release() + 58 frame #3: 0x00007fffee224796 libclangCppInterOp.so.21.0gitclang::CompilerInstance::~CompilerInstance() + 838 frame #4: 0x00007fffee22494d libclangCppInterOp.so.21.0gitclang::CompilerInstance::~CompilerInstance() + 13 frame #5: 0x00007fffed95ec62 libclangCppInterOp.so.21.0gitclang::IncrementalCUDADeviceParser::~IncrementalCUDADeviceParser() + 98 frame #6: 0x00007fffed9551b6 libclangCppInterOp.so.21.0gitclang::Interpreter::~Interpreter() + 102 frame #7: 0x00007fffed95598d libclangCppInterOp.so.21.0gitclang::Interpreter::~Interpreter() + 13 frame #8: 0x00007fffed9181e7 libclangCppInterOp.so.21.0gitcompat::createClangInterpreter(std::vector<char const*, std::allocator<char const*>>&) + 2919 ``` Problem : 1) The destructor currently handles no clearance for the DeviceParser and the DeviceAct. We currently only have this https://github.com/llvm/llvm-project/blob/976493822443c52a71ed3c67aaca9a555b20c55d/clang/lib/Interpreter/Interpreter.cpp#L416-L419 2) The ownership for DeviceCI currently is present in IncrementalCudaDeviceParser. But this should be similar to how the combination for hostCI, hostAction and hostParser are managed by the Interpreter. As on master the DeviceAct and DeviceParser are managed by the Interpreter but not DeviceCI. This is problematic because : IncrementalParser holds a Sema& which points into the DeviceCI. On master, DeviceCI is destroyed before the base class ~IncrementalParser() runs, causing Parser::reset() to access a dangling Sema (and as Sema holds a reference to Preprocessor which owns PragmaNamespace) we see this ``` * frame #0: 0x00007fffee41cfe3 libclangCppInterOp.so.21.0gitclang::PragmaNamespace::~PragmaNamespace() + 99 frame #1: 0x00007fffee435666 libclangCppInterOp.so.21.0gitclang::Preprocessor::~Preprocessor() + 3830 ```
herobuxx
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May 7, 2025
The mcmodel=tiny memory model is only valid on ARM targets. While trying
this on X86 compiler throws an internal error along with stack dump.
#125641
This patch resolves the issue.
Reduced test case:
```
#include <stdio.h>
int main( void )
{
printf( "Hello, World!\n" );
return 0;
}
```
```
0. Program arguments: /opt/compiler-explorer/clang-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -mcmodel=tiny <source>
1. <eof> parser at end of file
#0 0x0000000003b10218 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3b10218)
#1 0x0000000003b0e35c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3b0e35c)
#2 0x0000000003a5dbc3 llvm::CrashRecoveryContext::HandleExit(int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3a5dbc3)
#3 0x0000000003b05cfe llvm::sys::Process::Exit(int, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3b05cfe)
#4 0x0000000000d4e3eb LLVMErrorHandler(void*, char const*, bool) cc1_main.cpp:0:0
#5 0x0000000003a67c93 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3a67c93)
#6 0x0000000003a67df8 (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3a67df8)
#7 0x0000000002549148 llvm::X86TargetMachine::X86TargetMachine(llvm::Target const&, llvm::Triple const&, llvm::StringRef, llvm::StringRef, llvm::TargetOptions const&, std::optional<llvm::Reloc::Model>, std::optional<llvm::CodeModel::Model>, llvm::CodeGenOptLevel, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x2549148)
#8 0x00000000025491fc llvm::RegisterTargetMachine<llvm::X86TargetMachine>::Allocator(llvm::Target const&, llvm::Triple const&, llvm::StringRef, llvm::StringRef, llvm::TargetOptions const&, std::optional<llvm::Reloc::Model>, std::optional<llvm::CodeModel::Model>, llvm::CodeGenOptLevel, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x25491fc)
#9 0x0000000003db74cc clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3db74cc)
#10 0x0000000004460d95 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4460d95)
#11 0x00000000060005ec clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x60005ec)
#12 0x00000000044614b5 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x44614b5)
#13 0x0000000004737121 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4737121)
#14 0x00000000046b777b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x46b777b)
#15 0x00000000048229e3 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x48229e3)
#16 0x0000000000d50621 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xd50621)
#17 0x0000000000d48e2d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#18 0x00000000044acc99 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#19 0x0000000003a5dac3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3a5dac3)
#20 0x00000000044aceb9 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#21 0x00000000044710dd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x44710dd)
#22 0x0000000004472071 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4472071)
#23 0x000000000447c3fc clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x447c3fc)
#24 0x0000000000d4d2b1 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xd4d2b1)
#25 0x0000000000c12464 main (/opt/compiler-explorer/clang-trunk/bin/clang+++0xc12464)
#26 0x00007ae43b029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#27 0x00007ae43b029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#28 0x0000000000d488c5 _start (/opt/compiler-explorer/clang-trunk/bin/clang+++0xd488c5)
```
---------
Co-authored-by: Shashwathi N <[email protected]>
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