search

clang-omp / clang

clang with OpenMP 3.1 and some elements of OpenMP 4.0 support
clang-omp.github.com
Other
91 stars 15 forks source link

Segmentation fault: 11 ./bin/c/ctest_omp_taskyield > bin/c/ctest_omp_taskyield.out #34

Closed jwhowarth closed 10 years ago

jwhowarth commented 10 years ago

Building current clang-omp by applying a diff of current clang-omp at commit f9e2fd7640f8fc06ebe1ef2f065c6158f6b4b6ef vs the stock clang 3.4 sources from llvm.org over the clang 3.4.1 sources, builds fine on x86_64-apple-darwin11/12 using the llvm34 four stage bootstrap build of llvm/compiler-rt/clang/polly. However the resulting build exhibits the following segfault in the the OpenMP3.1_Validation test suite (with CC = /sw/opt/llvm-3.4/bin/clang set in the Makefile).

Testing for "omp_taskyield": Generating sources .............. success Compiling soures ................ success Running test with 8 threads ..... success ...sh: line 1: 38338 Segmentation fault: 11 ./bin/c/ctest_omp_taskyield > bin/c/ctest_omp_taskyield.out ... and verified with 139% certainty

This failure is observed on both darwin11 with openmp built with clang from Xcode 4.6.3 and darwin12 with openmp built with clang from Xcode 5.1.1. On darwin11, the segault backtraces as…

howarth% lldb ./ctest_omp_taskyield Current executable set to './ctest_omp_taskyield' (x86_64). (lldb) r Process 38490 launched: './ctest_omp_taskyield' (x86_64)

OpenMP Validation Suite V 3.0a

Repetitions: 20

Loop Count : 1000

Testing omp taskyield

Process 38490 stopped

The summary of the test suite on x86_64-apple-darwin11 for clang-omp merged into clang 3.4.1 shows…

Summary: S Number of tested Open MP constructs: 62 S Number of used tests: 123 S Number of failed tests: 7 S Number of successful tests: 116 S + from this were verified: 88

Normal tests: N Number of failed tests: 4 N + from this fail compilation: 0 N + from this timed out 0 N Number of successful tests: 58 N + from this were verified: 43

Orphaned tests: O Number of failed tests: 3 O + from this fail compilation: 0 O + from this timed out 0 O Number of successful tests: 58 O + from this were verified: 45

jwhowarth commented 10 years ago

The openmp used in this testing was built from r208472 of the openmp trunk svn obtained from http://llvm.org/svn/llvm-project/openmp/trunk/. The libiomp5.dylib was built with the system clang from Xcode 4.6.3 or Xcode 5.1.1 by…

    pushd projects/openmp/runtime
    make -j1  compiler=clang
jwhowarth commented 10 years ago

This segfault in bin/c/ctest_omp_taskyield is also observed on x86_64-apple-darwin13 with openmp built with clang from Xcode 5.1.1.

alexey-bataev commented 10 years ago

Hi, It is known incompatibility between libiomp and this test suite. It will be fixed with the new release of the openmp library.

Best regards,

Alexey Bataev

Software Engineer Intel Compiler Team Intel Corp.

jwhowarth commented 10 years ago

Alexy, One last question. Where exactly is the active development tree for openmp? Hal Finkel claimed that the official location for openmp (at least for llvm.org) is http://llvm.org/svn/llvm-project/openmp/trunk/. Thanks in advance for any clarifications. Jack

On Tue, May 20, 2014 at 10:45 PM, Alexey Bataev notifications@github.comwrote:

Hi, It is known incompatibility between libiomp and this test suite. It will be fixed with the new release of the openmp library.

Best regards, Alexey Bataev

Software Engineer Intel Compiler Team Intel Corp.

— Reply to this email directly or view it on GitHubhttps://github.com/clang-omp/clang/issues/34#issuecomment-43706842 .

alexey-bataev commented 10 years ago

Hi Jack, The official version of clang with OpenMP is http://llvm.org/svn/llvm-project/openmp/trunk/. But it is not completed yet and there is a lot of work to be done. So you can consider http://clang-omp.github.com as a temp replacement for official clang until it has full support of OpenMP. We're working on both projects actively.

Best regards, Alexey Bataev

Software Engineer Intel Compiler Team Intel Corp.