llvmbot
commented
1 year ago @llvm/issue-subscribers-backend-aarch64
Author: None (rlcamp)
I first hit this when compiling some unrelated stack switching code, and then checked to see if it also affected libucontext, which it does. Steps to reproduce:
fresh install of latest bookworm-based 64-bit raspberry pi OS lite
apt install git clang
git clone --depth 1 https://github.com/kaniini/libucontext.git
cd libucontext
make CC=clang
results in:
```cp arch/common/include/libucontext/bits.h include/libucontext/bits.h
clang -std=gnu99 -D_BSD_SOURCE -fPIC -DPIC -ggdb3 -O2 -Wall -Iinclude -Iarch/aarch64 -Iarch/common -DEXPORT_UNPREFIXED -c -o arch/aarch64/makecontext.o arch/aarch64/makecontext.c
In file included from arch/aarch64/makecontext.c:15:
In file included from /usr/include/string.h:26:
In file included from /usr/include/aarch64-linux-gnu/bits/libc-header-start.h:33:
/usr/include/features.h:194:3: warning: "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE" [-W#warnings]
warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
^
arch/aarch64/makecontext.c:48:7: warning: incompatible pointer types assigning to 'unsigned long *' from 'unsigned long long *' [-Wincompatible-pointer-types]
regp = &(ucp->uc_mcontext.regs[0]);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
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: clang -std=gnu99 -D_BSD_SOURCE -fPIC -DPIC -ggdb3 -O2 -Wall -Iinclude -Iarch/aarch64 -Iarch/common -DEXPORT_UNPREFIXED -c -o arch/aarch64/makecontext.o arch/aarch64/makecontext.c
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'arch/aarch64/makecontext.c'.
4. Running pass 'AArch64 Assembly Printer' on function '@libucontext_makecontext'
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamEi+0x44)[0x7fb34de4dc]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm3sys17RunSignalHandlersEv+0x70)[0x7fb34dc4b4]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(+0xdcb1c0)[0x7fb340b1c0]
linux-vdso.so.1(__kernel_rt_sigreturn+0x0)[0x7fbbd507bc]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(+0x132a9f0)[0x7fb396a9f0]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm11raw_ostream5writeEPKcm+0x164)[0x7fb34bb49c]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm9MCContext16createTempSymbolERKNS_5TwineEb+0xb4)[0x7fb4871048]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm9MCContext16createTempSymbolEv+0x3c)[0x7fb48713f0]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm16MCDwarfLineEntry4makeEPNS_10MCStreamerEPNS_9MCSectionE+0x3c)[0x7fb4879ec0]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm16MCObjectStreamer19emitInstructionImplERKNS_6MCInstERKNS_15MCSubtargetInfoE+0x94)[0x7fb4896934]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm16MCObjectStreamer15emitInstructionERKNS_6MCInstERKNS_15MCSubtargetInfoE+0x140)[0x7fb4896858]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(+0x28adf50)[0x7fb4eedf50]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(+0x2767f08)[0x7fb4da7f08]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm10AsmPrinter16emitFunctionBodyEv+0xa10)[0x7fb3c7ef30]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(+0x2764ba4)[0x7fb4da4ba4]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm19MachineFunctionPass13runOnFunctionERNS_8FunctionE+0x140)[0x7fb383122c]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE+0x26c)[0x7fb3614390]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE+0x3c)[0x7fb361af70]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE+0x7b4)[0x7fb3614d98]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(_ZN5clang17EmitBackendOutputERNS_17DiagnosticsEngineERKNS_19HeaderSearchOptionsERKNS_14CodeGenOptionsERKNS_13TargetOptionsERKNS_11LangOptionsEN4llvm9StringRefEPNSE_6ModuleENS_13BackendActionESt10unique_ptrINSE_17raw_pwrite_streamESt14default_deleteISK_EE+0xad0)[0x7fba11c680]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(+0x1b06f20)[0x7fba3d6f20]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(_ZN5clang8ParseASTERNS_4SemaEbb+0x210)[0x7fb9316f1c]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(_ZN5clang14FrontendAction7ExecuteEv+0x80)[0x7fbacd4444]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(_ZN5clang16CompilerInstance13ExecuteActionERNS_14FrontendActionE+0x328)[0x7fbac47d28]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(_ZN5clang25ExecuteCompilerInvocationEPNS_16CompilerInstanceE+0x218)[0x7fbad47d20]
clang(_Z8cc1_mainN4llvm8ArrayRefIPKcEES2_Pv+0x810)[0x413608]
clang[0x411df4]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(+0x207c5fc)[0x7fba94c5fc]
/lib/aarch64-linux-gnu/libLLVM-14.so.1(_ZN4llvm20CrashRecoveryContext9RunSafelyENS_12function_refIFvvEEE+0xcc)[0x7fb340ae94]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(_ZNK5clang6driver10CC1Command7ExecuteEN4llvm8ArrayRefINS2_8OptionalINS2_9StringRefEEEEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPb+0x120)[0x7fba94c000]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(_ZNK5clang6driver11Compilation14ExecuteCommandERKNS0_7CommandERPS3_+0x2b0)[0x7fba920f50]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(_ZNK5clang6driver11Compilation11ExecuteJobsERKNS0_7JobListERN4llvm15SmallVectorImplISt4pairIiPKNS0_7CommandEEEE+0x7c)[0x7fba92118c]
/lib/aarch64-linux-gnu/libclang-cpp.so.14(_ZN5clang6driver6Driver18ExecuteCompilationERNS0_11CompilationERN4llvm15SmallVectorImplISt4pairIiPKNS0_7CommandEEEE+0xd8)[0x7fba9350c4]
clang(main+0x23d4)[0x411648]
/lib/aarch64-linux-gnu/libc.so.6(+0x27780)[0x7fb21b7780]
/lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0x98)[0x7fb21b7858]
clang(_start+0x30)[0x40eef0]
clang: error: clang frontend command failed with exit code 139 (use -v to see invocation)
Debian clang version 14.0.6
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/makecontext-3639f8.c
clang: note: diagnostic msg: /tmp/makecontext-3639f8.sh
clang: note: diagnostic msg:
********************
make: *** [Makefile:147: arch/aarch64/makecontext.o] Error 139
```
[makecontext-3639f8.c.txt](https://github.com/llvm/llvm-project/files/13167907/makecontext-3639f8.c.txt)
[makecontext-3639f8.sh.txt](https://github.com/llvm/llvm-project/files/13167912/makecontext-3639f8.sh.txt)
I also followed the recommended steps in the LLVM bug report workflow which led to the following backend code generator result:
```clang -emit-llvm -std=gnu99 -D_BSD_SOURCE -fPIC -DPIC -ggdb3 -O2 -Wall -Iinclude -Iarch/aarch64 -Iarch/common -DEXPORT_UNPREFIXED -c -o arch/aarch64/makecontext.bc arch/aarch64/makecontext.c
llc arch/aarch64/makecontext.bc
# the above did not crash, so
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. Program arguments: llc arch/aarch64/makecontext.bc
1. Running pass 'Function Pass Manager' on module 'arch/aarch64/makecontext.bc'.
2. Running pass 'AArch64 Assembly Printer' on function '@libucontext_makecontext'
#0 0x0000007fabb9e4dc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xe9e4dc)
#1 0x0000007fabb9c4b4 llvm::sys::RunSignalHandlers() (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xe9c4b4)
#2 0x0000007fabb9ea9c (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xe9ea9c)
#3 0x0000007fb0fcb7bc (linux-vdso.so.1+0x7bc)
#4 0x0000007fac02a9f0 (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x132a9f0)
#5 0x0000007fabb7b49c llvm::raw_ostream::write(char const*, unsigned long) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xe7b49c)
#6 0x0000007facf31048 llvm::MCContext::createTempSymbol(llvm::Twine const&, bool) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x2231048)
#7 0x0000007facf313f0 llvm::MCContext::createTempSymbol() (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x22313f0)
#8 0x0000007fac3576e8 llvm::DebugHandlerBase::endInstruction() (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x16576e8)
#9 0x0000007fac3400d8 llvm::AsmPrinter::emitFunctionBody() (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x16400d8)
#10 0x0000007fad464ba4 (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x2764ba4)
#11 0x0000007fabef122c llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x11f122c)
#12 0x0000007fabcd4390 llvm::FPPassManager::runOnFunction(llvm::Function&) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xfd4390)
#13 0x0000007fabcdaf70 llvm::FPPassManager::runOnModule(llvm::Module&) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xfdaf70)
#14 0x0000007fabcd4d98 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xfd4d98)
#15 0x000000000041043c main (/usr/lib/llvm-14/bin/llc+0x41043c)
#16 0x0000007faa877780 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#17 0x0000007faa877858 call_init ./csu/../csu/libc-start.c:128:20
#18 0x0000007faa877858 __libc_start_main ./csu/../csu/libc-start.c:347:5
#19 0x000000000040ba70 _start (/usr/lib/llvm-14/bin/llc+0x40ba70)
Segmentation fault
bugpoint -run-llc arch/aarch64/makecontext.bc
Read input file : 'arch/aarch64/makecontext.bc'
*** All input ok
Initializing execution environment: Found llc: /usr/lib/llvm-14/bin/llc
Running the code generator to test for a crash: <llc>
Generating reference output from raw program: <llc>
Error running tool:
/usr/lib/llvm-14/bin/llc -o bugpoint-test-program-be893e8.bc-654f6fd.llc.s bugpoint-test-program-be893e8.bc
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. Program arguments: /usr/lib/llvm-14/bin/llc -o bugpoint-test-program-be893e8.bc-654f6fd.llc.s bugpoint-test-program-be893e8.bc
1. Running pass 'Function Pass Manager' on module 'bugpoint-test-program-be893e8.bc'.
2. Running pass 'AArch64 Assembly Printer' on function '@libucontext_makecontext'
#0 0x0000007f92dbe4dc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xe9e4dc)
#1 0x0000007f92dbc4b4 llvm::sys::RunSignalHandlers() (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xe9c4b4)
#2 0x0000007f92dbea9c (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xe9ea9c)
#3 0x0000007f981e57bc (linux-vdso.so.1+0x7bc)
#4 0x0000007f9324a9f0 (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x132a9f0)
#5 0x0000007f92d9b49c llvm::raw_ostream::write(char const*, unsigned long) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xe7b49c)
#6 0x0000007f94151048 llvm::MCContext::createTempSymbol(llvm::Twine const&, bool) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x2231048)
#7 0x0000007f941513f0 llvm::MCContext::createTempSymbol() (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x22313f0)
#8 0x0000007f935776e8 llvm::DebugHandlerBase::endInstruction() (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x16576e8)
#9 0x0000007f935600d8 llvm::AsmPrinter::emitFunctionBody() (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x16400d8)
#10 0x0000007f94684ba4 (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x2764ba4)
#11 0x0000007f9311122c llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0x11f122c)
#12 0x0000007f92ef4390 llvm::FPPassManager::runOnFunction(llvm::Function&) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xfd4390)
#13 0x0000007f92efaf70 llvm::FPPassManager::runOnModule(llvm::Module&) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xfdaf70)
#14 0x0000007f92ef4d98 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/lib/aarch64-linux-gnu/libLLVM-14.so.1+0xfd4d98)
#15 0x000000000041043c main (/usr/lib/llvm-14/bin/llc+0x41043c)
#16 0x0000007f91a97780 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#17 0x0000007f91a97858 call_init ./csu/../csu/libc-start.c:128:20
#18 0x0000007f91a97858 __libc_start_main ./csu/../csu/libc-start.c:347:5
#19 0x000000000040ba70 _start (/usr/lib/llvm-14/bin/llc+0x40ba70)
*** Debugging code generator crash!
*** Attempting to reduce the number of function attributes in the testcase
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc>
<llc>
<llc>
<llc><crash>
<llc><crash>
<llc><crash>
<llc>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc>
<llc>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc>
<llc>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
<llc><crash>
Checking for crash with changing conditionals to always jump to true: ... <49 total>: <llc><crash>
Emitted bitcode to 'bugpoint-reduced-conditionals.bc'
Checking for crash with only these blocks: ... <49 total>: <llc><crash>
Emitted bitcode to 'bugpoint-reduced-blocks.bc'
Checking for crash with CFG simplifying: ... <49 total>: <llc><crash>
Emitted bitcode to 'bugpoint-reduced-simplifycfg.bc'
Checking for crash with only 249 instructions: <llc><crash>
Checking for crash with only 125 instructions: <llc><crash>
Checking for crash with only 63 instructions: <llc>
Checking for crash with only 62 instructions: <llc>
Checking for crash with only 94 instructions: <llc>
Checking for crash with only 31 instructions: <llc>
Checking for crash with only 110 instructions: <llc>
Checking for crash with only 15 instructions: <llc>
Checking for crash with only 118 instructions: <llc>
Checking for crash with only 7 instructions: <llc><crash>
Checking for crash with only 4 instructions: <llc>
Checking for crash with only 3 instructions: <llc>
Checking for crash with only 6 instructions: <llc>
Checking for crash with only 1 instruction: <llc>
Checking for crash with only 6 instructions: <llc>
Checking for crash with only 6 instructions: <llc>
Checking for crash with only 6 instructions: <llc>
Checking for crash with only 6 instructions: <llc><crash>
Checking for crash with only 5 instructions: <llc>
Checking for crash with only 5 instructions: <llc>
Checking for crash with only 5 instructions: <llc>
Checking for crash with only 5 instructions: <llc><crash>
Checking for crash with only 4 instructions: <llc>
Checking for crash with only 4 instructions: <llc><crash>
Checking for crash with only 3 instructions: <llc>
Checking for crash with only 3 instructions: <llc>
Checking for crash with only 3 instructions: <llc>
Checking for crash with only 3 instructions: <llc>
*** Attempting to reduce testcase by deleting instructions: Simplification Level #1
Checking instruction: %5 = getelementptr inbounds %struct.ucontext_t.3.8.13, %struct.ucontext_t.3.8.13* %0, i64 0, i32 5, i32 1, i64 0, !dbg !98<llc>
Checking instruction: call void @llvm.dbg.value(metadata i64* %5, metadata !80, metadata !DIExpression()), !dbg !99<llc>
Checking instruction: %29 = add nsw i32 undef, 8, !dbg !100<llc>
Checking instruction: call void @llvm.dbg.value(metadata i32 8, metadata !95, metadata !DIExpression()), !dbg !99<llc>
*** Attempting to reduce testcase by deleting instructions: Simplification Level #0
Checking instruction: %5 = getelementptr inbounds %struct.ucontext_t.3.8.13, %struct.ucontext_t.3.8.13* %0, i64 0, i32 5, i32 1, i64 0, !dbg !98<llc>
Checking instruction: call void @llvm.dbg.value(metadata i64* %5, metadata !80, metadata !DIExpression()), !dbg !99<llc>
Checking instruction: %29 = add nsw i32 undef, 8, !dbg !100<llc>
Checking instruction: call void @llvm.dbg.value(metadata i32 8, metadata !95, metadata !DIExpression()), !dbg !99<llc>
Checking for crash with metadata retained from 53 instructions: <llc>
Emitted bitcode to 'bugpoint-reduced-instructions.bc'
*** Attempting to strip the debug info: <llc>
*** Attempting to strip the debug type info: <llc>
*** Attempting to remove named metadata: Checking for crash with only these named metadata nodes: llvm.dbg.cu llvm.module.flags llvm.ident: <llc>
Checking for crash with only 12 named metadata operands: <llc>
Emitted bitcode to 'bugpoint-reduced-named-md.bc'
*** Attempting to perform final cleanups: <llc>
Emitted bitcode to 'bugpoint-reduced-simplified.bc'
```
[bugpoint-reduced-simplified.bc.zip](https://github.com/llvm/llvm-project/files/13168007/bugpoint-reduced-simplified.bc.zip)
rlcamp
I first hit this when compiling some unrelated stack switching code, and then checked to see if it also affected libucontext, which it does. Steps to reproduce:
fresh install of latest bookworm-based 64-bit raspberry pi OS lite apt install git clang git clone --depth 1 https://github.com/kaniini/libucontext.git cd libucontext make CC=clang
results in:
makecontext-3639f8.c.txt makecontext-3639f8.sh.txt
I also followed the recommended steps in the LLVM bug report workflow which led to the following backend code generator result:
bugpoint-reduced-simplified.bc.zip