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[3.7] segmentation fault on simple C compilation (mingw-w64) #25102

Open llvmbot opened 9 years ago

llvmbot commented 9 years ago
Bugzilla Link 24728
Version 3.7
OS Windows XP
Reporter LLVM Bugzilla Contributor

Extended Description

I am getting a segmentation fault in Clang when trying to compile a simple hello world C code with clang -o hello.exe hello.c testcase:

include

include

int main(void) { printf("Hello World!\n"); return EXIT_SUCCESS; }

Backtrace: Starting program: E:\msys\mingw64-64\bin\clang.exe -o hello.exe hello.c [New Thread 5112.0xb8c]

Program received signal SIGSEGV, Segmentation fault. llvm::opt::ArgList::MakeArgString (this=0x30ad70, Str=...) at e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.src/include/llvm/Option/ArgList.h:298 298 return MakeArgStringRef(Str.toStringRef(Buf));

​0 llvm::opt::ArgList::MakeArgString (this=0x30ad70, Str=...)

at e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.src/include/llvm/Option/ArgList.h:298

​1 0x00000000004eb13b in clang::driver::tools::Clang::AddObjCRuntimeArgs (this=this@entry=0x30c150, args=..., cmdArgs=...,

rewriteKind=rewriteKind@entry=clang::driver::tools::Clang::RK_None)
at e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.src/tools/clang/lib/Driver/Tools.cpp:5143

​2 0x000000000050d2f6 in clang::driver::tools::Clang::ConstructJob (this=, this@entry=0x30c150, C=..., JA=..., Output=...,

Inputs=..., Args=..., LinkingOutput=LinkingOutput@entry=0x0)
at e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.src/tools/clang/lib/Driver/Tools.cpp:4509

​3 0x00000000004b657e in clang::driver::Driver::BuildJobsForAction (this=this@entry=0x22eda0, C=..., A=, TC=TC@entry=0x30b2d0,

BoundArch=BoundArch@entry=0x0, AtTopLevel=false, MultipleArchs=MultipleArchs@entry=false, LinkingOutput=LinkingOutput@entry=0x0, Result=...)
at e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.src/tools/clang/lib/Driver/Driver.cpp:1858

​4 0x00000000004b645f in clang::driver::Driver::BuildJobsForAction (this=this@entry=0x22eda0, C=..., A=, A@entry=0x30c0d0,

TC=0x30b2d0, BoundArch=BoundArch@entry=0x0, AtTopLevel=AtTopLevel@entry=true, MultipleArchs=false, LinkingOutput=0x0, Result=...)
at e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.src/tools/clang/lib/Driver/Driver.cpp:1823

​5 0x00000000004b6de2 in clang::driver::Driver::BuildJobs (this=, C=...)

at e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.src/tools/clang/lib/Driver/Driver.cpp:1625

​6 0x00000000004b8180 in clang::driver::Driver::BuildCompilation (this=this@entry=0x22eda0, ArgList=...)

at e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.src/tools/clang/lib/Driver/Driver.cpp:476

​7 0x0000000002548308 in main (argc=, argv=)

at e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.src/tools/clang/tools/driver/driver.cpp:457

Clang/LLVM was compiled as 64-bit debug+assert build with: ../llvm-3.7.0.src/configure --prefix=/mingw64-64 --host=x86_64-w64-mingw32 --disable-shared --enable-assertions --enable-debug-symbols --enable-keep-symbols --enable-targets="x86 x86_64 cpp" --disable-docs "--with-gcc-toolchain=which x86_64-w64-mingw32-gcc | xargs dirname" CC=x86_64-w64-mingw32-gcc CXX=x86_64-w64-mingw32-g++ AR=x86_64-w64-mingw32-gcc-ar LD=x86_64-w64-mingw32-ld "CPPFLAGS=-std=c++14" using gcc 5.2.0: ../../src/gcc-5.2.0/configure --host=x86_64-w64-mingw32 --enable-languages=c,c++ --enable-seh-exceptions --enable-threads=posix --disable-nls --disable-shared --enable-static --enable-fully-dynamic-string --enable-lto --enable-plugins --enable-libgomp --with-dwarf2 --disable-win32-registry --enable-version-specific-runtime-libs --prefix=/mingw64-64 --with-sysroot=/mingw64-64 --target=x86_64-w64-mingw32 --enable-targets=all --enable-checking=release --with-gmp=/usr/new-gcc/lib/gmp-5.0.5 --with-mpfr=/usr/new-gcc/lib/mpfr-2.4.2 --with-mpc=/usr/new-gcc/lib/mpc-0.9 --with-isl=/usr/new-gcc/lib/isl-0.12.2 --with-cloog=/usr/new-gcc/lib/cloog-0.18.3 --with-host-libstdcxx='-lstdc++ -lsupc++' --disable-cloog-version-check --enable-cloog-backend=isl

llvmbot commented 8 years ago

OK, it seems like it's related to assertions, somehow.

../llvm-3.7.0.src/configure --prefix=/clang64rel3 --enable-targets=x86,x86_64 --enable-optimized --disable-keep-symbols --disable-debug-runtime --disable-debug-symbols CC="gcc -Wa,-mbig-obj" CXX="g++ -Wa,-mbig-obj"

produces the subtly nonworking compiler as I described, but adding --disable-assertions to a new build makes it work, defined as wxWidgets compiling to success and the demos actually working (mostly, barring some #​24395 errors worked around by using static libraries).

So Release works, but Release+Asserts doesn't. Strange.

llvmbot commented 8 years ago

Also, trying the workaround, the compiler doesn't work right (handful of segfaults trying to compile wxWidgets 3.0.2). So this might not be a clang/LLVM issue, it could be something with the compiler used to compile clang/LLVM.

llvmbot commented 8 years ago

Just to throw something in here, I have the same symptoms (on a Release+Debug+Asserts build, mingw64, gcc 5.2.) Stepping through with gdb doesn't show anything particularly helpful (the string is correct right until the MakeArgString call segfaults.)

Program received signal SIGSEGV, Segmentation fault. llvm::opt::ArgList::MakeArgString (this=0x2e7afd0, Str=...) at C:/msys64/home/work/mingw2/llvm-3.7.0.src/include/llvm/Option/ArgList.h:298 298 return MakeArgStringRef(Str.toStringRef(Buf)); (gdb) bt

​0 llvm::opt::ArgList::MakeArgString (this=0x2e7afd0, Str=...)

at C:/msys64/home/work/mingw2/llvm-3.7.0.src/include/llvm/Option/ArgList.h:298

​1 0x00000000004eae8b in clang::driver::tools::Clang::AddObjCRuntimeArgs (

this=this@entry=0x2e7c380, args=..., cmdArgs=..., 
rewriteKind=rewriteKind@entry=clang::driver::tools::Clang::RK_None)
at C:/msys64/home/work/mingw2/llvm-3.7.0.src/tools/clang/lib/Driver/Tools.cpp:5143

​2 0x000000000050d116 in clang::driver::tools::Clang::ConstructJob (

this=<optimized out>, this@entry=0x2e7c380, C=..., JA=..., Output=..., 
Inputs=..., Args=..., LinkingOutput=LinkingOutput@entry=0x0)
at C:/msys64/home/work/mingw2/llvm-3.7.0.src/tools/clang/lib/Driver/Tools.cpp:4509

​3 0x00000000004b643e in clang::driver::Driver::BuildJobsForAction (

this=this@entry=0x22eda0, C=..., A=<optimized out>, 
TC=TC@entry=0x2e7b4e0, BoundArch=BoundArch@entry=0x0, AtTopLevel=false, 
MultipleArchs=MultipleArchs@entry=false, 
LinkingOutput=LinkingOutput@entry=0x0, Result=...)
at C:/msys64/home/work/mingw2/llvm-3.7.0.src/tools/clang/lib/Driver/Driver.cpp:1858

​4 0x00000000004b631f in clang::driver::Driver::BuildJobsForAction (

this=this@entry=0x22eda0, C=..., A=<optimized out>, A@entry=0x2e7c300, 
TC=0x2e7b4e0, BoundArch=BoundArch@entry=0x0, 
AtTopLevel=AtTopLevel@entry=true, MultipleArchs=false, LinkingOutput=0x0, 
Result=...)
at C:/msys64/home/work/mingw2/llvm-3.7.0.src/tools/clang/lib/Driver/Driver.cpp:1823

​5 0x00000000004b6ca2 in clang::driver::Driver::BuildJobs (

this=<optimized out>, C=...)
at C:/msys64/home/work/mingw2/llvm-3.7.0.src/tools/clang/lib/Driver/Driver.cpp:1625

​6 0x00000000004b8040 in clang::driver::Driver::BuildCompilation (

this=this@entry=0x22eda0, ArgList=...)
at C:/msys64/home/work/mingw2/llvm-3.7.0.src/tools/clang/lib/Driver/Driver.cpp:476

​7 0x000000000244bca3 in main (argc=, argv=)

at C:/msys64/home/work/mingw2/llvm-3.7.0.src/tools/clang/tools/driver/driver.cpp:457

However! Passing -fobjc-runtime=gcc on the commandline (i.e. exactly the same as what clang internally generates:)

(gdb) finish Run till exit from #​0 std::__cxx11::basic_string<char, std::char_traits, std::allocator >::_M_dispose (this=) at C:/msys64/mingw64/include/c++/5.2.0/bits/basic_string.h:179 clang::driver::tools::Clang::AddObjCRuntimeArgs (this=this@entry=0x303c380, args=..., cmdArgs=..., rewriteKind=rewriteKind@entry=clang::driver::tools::Clang::RK_None) at C:/msys64/home/work/mingw2/llvm-3.7.0.src/tools/clang/lib/Driver/Tools.cpp:5143 5143 args.MakeArgString("-fobjc-runtime=" + runtime.getAsString())); (gdb) s llvm::Twine::Twine (this=0x22d760, Str="-fobjc-runtime=gcc")

.. causes the logic of AddObjCRuntimeArgs to be skipped, and the compilation to succeed. So, a workaround, but not a solution. Like you, it works fine in the non-Release build. (after wrangling with the ~1.8GB limit for PE32+ .exes...)

llvmbot commented 9 years ago

Compiling Clang/LLVM with the following configuration does not reproduce this issue: ../llvm-3.7.0.src/configure --prefix=/mingw64-64 --host=x86_64-w64-mingw32 --disable-shared --disable-optimized --enable-assertions --enable-debug-runtime --enable-debug-symbols --enable-keep-symbols --enable-targets="x86 x86_64 cpp" --disable-docs "--with-gcc-toolchain=which x86_64-w64-mingw32-gcc | xargs dirname" CC=x86_64-w64-mingw32-gcc CXX=x86_64-w64-mingw32-g++ AR=x86_64-w64-mingw32-gcc-ar LD=x86_64-w64-mingw32-ld "CPPFLAGS=-std=c++14" "CFLAGS=-Og -g3 -ggdb -gdwarf-3" "CXXFLAGS=-Og -g3 -ggdb -gdwarf-3"

llvmbot commented 9 years ago

I failed to build Clang/LLVM without optimizations due to: e:/msys/mingw64-64/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/../../../../x86_64-w64-mingw32/bin/as.exe: e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.bin/tools/clang/lib/AST/Debug+Asserts/ASTContext.o: too many sections (37005) C:\Users\user\AppData\Local\Temp\ccYqltXC.s: Assembler messages: C:\Users\user\AppData\Local\Temp\ccYqltXC.s: Fatal error: can't write e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.bin/tools/clang/lib/AST/Debug+Asserts/ASTContext.o: File too big e:/msys/mingw64-64/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/../../../../x86_64-w64-mingw32/bin/as.exe: e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.bin/tools/clang/lib/AST/Debug+Asserts/ASTContext.o: too many sections (37005) C:\Users\user\AppData\Local\Temp\ccYqltXC.s: Fatal error: can't close e:/Downloads/Applications/llvm/3.7/llvm-3.7.0.bin/tools/clang/lib/AST/Debug+Asserts/ASTContext.o: File too big

The assembly file in question was around 33 MB.

llvmbot commented 9 years ago

The crash seems to happen before the mingw toolchain (as target) is invoked and likely to be unrelated to it. I asked if you have more than one mingw toolchain installed since DLLs from different mingw have the same name and any mixup would be bad and could explain mysterious crashes.

There are regular builds of clang with mingw here:

http://bb.pgr.jp/grid

Some ideas

1) Try a debug build (no optimizations). The stack trace will be more informative. If you can, debug and see what's going wrong. 2) I'm not sure how automake configure is up to date regarding mingw as most people are using CMAKE now. Try to build with CMAKE, it may have different flags used for building. 3) Try gcc 5.1 instead of gcc 5.2.

llvmbot commented 9 years ago

I would need to compile a different GCC version if needed. Is there a specific one I should try?

llvmbot commented 9 years ago

Do you have more than one gcc/mingw distribution installed?

llvmbot commented 9 years ago

Still present in trunk r246942: Starting program: E:\msys\mingw64-64\bin\clang.exe -o hello.exe hello.c [New Thread 4408.0x1570]

Program received signal SIGSEGV, Segmentation fault. llvm::opt::ArgList::MakeArgString (this=0x30bb720, Str=...) at e:/Downloads/Applications/llvm/trunk-r246942/src/include/llvm/Option/ArgList.h:301 301 return MakeArgStringRef(Str.toStringRef(Buf));

​0 llvm::opt::ArgList::MakeArgString (this=0x30bb720, Str=...)

at e:/Downloads/Applications/llvm/trunk-r246942/src/include/llvm/Option/ArgList.h:301

​1 0x00000000004eca2b in clang::driver::tools::Clang::AddObjCRuntimeArgs (this=this@entry=0x30bcb00, args=..., cmdArgs=...,

rewriteKind=rewriteKind@entry=clang::driver::tools::Clang::RK_None)
at e:/Downloads/Applications/llvm/trunk-r246942/src/tools/clang/lib/Driver/Tools.cpp:5275

​2 0x000000000051015a in clang::driver::tools::Clang::ConstructJob (this=this@entry=0x30bcb00, C=..., JA=..., Output=..., Inputs=..., Args=...,

LinkingOutput=LinkingOutput@entry=0x0) at e:/Downloads/Applications/llvm/trunk-r246942/src/tools/clang/lib/Driver/Tools.cpp:4650

​3 0x00000000004b66c5 in clang::driver::Driver::BuildJobsForAction (this=this@entry=0x22eda0, C=..., A=, TC=TC@entry=0x30bbc80,

BoundArch=BoundArch@entry=0x0, AtTopLevel=false, MultipleArchs=MultipleArchs@entry=false, LinkingOutput=LinkingOutput@entry=0x0, Result=...)
at e:/Downloads/Applications/llvm/trunk-r246942/src/tools/clang/lib/Driver/Driver.cpp:1884

​4 0x00000000004b65bd in clang::driver::Driver::BuildJobsForAction (this=this@entry=0x22eda0, C=..., A=, A@entry=0x30bca80,

TC=0x30bbc80, BoundArch=BoundArch@entry=0x0, AtTopLevel=AtTopLevel@entry=true, MultipleArchs=false, LinkingOutput=0x0, Result=...)
at e:/Downloads/Applications/llvm/trunk-r246942/src/tools/clang/lib/Driver/Driver.cpp:1849

​5 0x00000000004b6f22 in clang::driver::Driver::BuildJobs (this=, C=...)

at e:/Downloads/Applications/llvm/trunk-r246942/src/tools/clang/lib/Driver/Driver.cpp:1629

​6 0x00000000004b82d0 in clang::driver::Driver::BuildCompilation (this=this@entry=0x22eda0, ArgList=...)

at e:/Downloads/Applications/llvm/trunk-r246942/src/tools/clang/lib/Driver/Driver.cpp:478

​7 0x00000000025ccb0d in main (argc=, argv=)

at e:/Downloads/Applications/llvm/trunk-r246942/src/tools/clang/tools/driver/driver.cpp:519

A debugging session is active.

llvmbot commented 9 years ago

Could you try the same with current SVN clang?