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Message #13001
[Bug 1666339] Re: DFNflow crashes for compiled trunk but not non-optimized debug compiled trunk
Thanks for reporting.
The behavior you describe is a typical result of manipulating bad pointers. It crashes or not, sometimes randomly, sometimes depending on compilation options, and the crash can be delayed a little so that it seems to occur a few lines later.
** Changed in: yade
Assignee: (unassigned) => Bruno Chareyre (bruno-chareyre)
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https://bugs.launchpad.net/bugs/1666339
Title:
DFNflow crashes for compiled trunk but not non-optimized debug
compiled trunk
Status in Yade:
New
Bug description:
Distro: Xenial 16.04LTS
Yade Version: yade-2017-0207.git-11c276f
Compilation: default compilation with debug flags and '#define DFNFLOW' uncommented in DFNFlow.cpp
Summary:
DFNFlowEngine crashes for compiled yade-2017-0207.git-11c276f sources.
The segmentation fault also occurs for a debug compiled version and
yields the attached core dump. Interestingly, the DFNFlowEngine does
not crash for a non-optimized debug compilation of the same sources.
Description of failure:
According to the core dump, the failure can be traced back to
DFNFlow.cpp:176, where it is checking if the cell is inifinite
(although I have also had it fail at the permeability assignment
directly below line 176 for a modified version of DFNflow.cpp).
DFNFlow.cpp:
176: if ( Tri.is_infinite(cell1) || Tri.is_infinite(cell2)) cerr<<"Infinite cell found in trickPermeability, should be handled somehow, maybe"<<endl;
177: cell1->info().kNorm()[facet->second]=cell2->info().kNorm()[Tri.mirror_index(cell1, facet- >second)] = pow((aperture+residualAperture),3)/(12*viscosity);
I am unsure why this line is causing a crash in the optimized-debug
compiled code, but not the non-optimized-debug compiled code.
My optimized-debug compiled executable is simply built with the flag
-DDEBUG=ON. My non-optimized debug compiled code uses an edited
CMakeLists.txt to avoid optimization:
IF(CMAKE_COMPILER_IS_GNUCC)
SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0")
SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -O0")
ENDIF(CMAKE_COMPILER_IS_GNUCC)
The attached zip contains:
mwe.py // input script
liteSpecimen2mm.spheres // packing file
jointSurf.stl // stl for smooth joint
coreDump2.txt // core dump after executing mwe.py with optimized debug compiled yade
Any assistance with this bug is greatly appreciated.
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References