forked from OSchip/llvm-project
15c66b1011
Tests on Solaris/sparcv9 currently show about 250 failures when building with gcc, most of them like the following: FAIL: LLVM-Unit :: Support/./SupportTests/TaskQueueTest.UnOrderedFutures (4269 of 67884) ******************** TEST 'LLVM-Unit :: Support/./SupportTests/TaskQueueTest.UnOrderedFutures' FAILED ******************** Note: Google Test filter = TaskQueueTest.UnOrderedFutures [==========] Running 1 test from 1 test case. [----------] Global test environment set-up. [----------] 1 test from TaskQueueTest [ RUN ] TaskQueueTest.UnOrderedFutures 0 SupportTests 0x0000000100753b20 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 32 1 SupportTests 0x0000000100752974 llvm::sys::RunSignalHandlers() + 68 2 SupportTests 0x0000000100752b18 SignalHandler(int) + 372 3 libc.so.1 0xffffffff7eedc800 __sighndlr + 12 4 libc.so.1 0xffffffff7eecf23c call_user_handler + 852 5 libc.so.1 0xffffffff7eecf594 sigacthandler + 84 6 SupportTests 0x00000001006f8cb8 std:🧵:_State_impl<std:🧵:_Invoker<std::tuple<llvm::ThreadPool::ThreadPool(llvm::ThreadPoolStrategy)::'lambda'()> > >::_M_run() + 512 7 libstdc++.so.6.0.28 0xfffffffc628117cc execute_native_thread_routine + 16 8 libc.so.1 0xffffffff7eedc6a0 _lwp_start + 0 Since it's effectively impossible to debug such a `SEGV` in a `Release` build, I tried a `Debug` build instead, only to find that the failures had gone away. Further investigation revealed that most of the issue centers around `llvm/lib/Support/ThreadPool.cpp`. That file is built with `-O3 -fPIC` in a `Release` build. The failure vanishes if - compiling without `-fPIC` - compiling with `-O -fPIC` - linking with GNU `ld` instead of Solaris `ld` It has meanwhile been determined that `gcc` doesn't correctly heed some TLS code sequences. To make things worse, Solaris `ld` doesn't properly validate its assumptions against the input, generating wrong code. `gld` like `gcc` is more liberal here and correctly deals with the code it gets fed from `gcc`. There's PR target/96607: GCC feeds SPARC/Solaris linker with unrecognized TLS sequences <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96607> now. An attempt to build with `-DLLVM_ENABLE_PIC=Off` initially failed since neither `libRemarks.so` (D85626 <https://reviews.llvm.org/D85626>) nor `LLVMPolly.so` (D85627 <https://reviews.llvm.org/D85627>) heed that option. Even with that fixed, a few codegen failures remain. Next I tried to build just `ThreadPool.cpp` with `-O -fPIC`. While that fixed the vast majority of the failures, 16 `LLVM :: CodeGen/X86` failures remained. Given that that solution was both incomplete and fragile, I went for building the whole tree with `-O -fPIC` for `Release` and `RelWithDebInfo` builds. As detailed in Bug 47304, 2-stage builds also show large numbers of failures when building with `-O3` or `-O2`, which are likewise worked around by building with `-O` until they are sufficiently analyzed and fixed. This way, all failures relative to a `Debug` build go away. Tested on `sparcv9-sun-solaris2.11`. Differential Revision: https://reviews.llvm.org/D85630 |
||
|---|---|---|
| .. | ||
| modules | ||
| platforms | ||
| README | ||
| config-ix.cmake | ||
| config.guess | ||
| dummy.cpp | ||
| nsis_icon.ico | ||
| nsis_logo.bmp | ||
README
See docs/CMake.html for instructions on how to build LLVM with CMake.