Crash for Illegal instruction when upgrading to hyperscan 4.4.1 about hyperscan

[mdb256]

To summarise: you've built the Hyperscan library on a machine with the AVX2 microarchitecture, and then used that binary on a machine that only has SSE4.2/POPCNT, and hit an illegal instruction while compiling a pattern.

I cannot tell how you have built the library, but I don't think the fat runtime option has been enabled.

Is it a Release or RelWithDebInfo build, or a Debug build? The fat runtime is only enabled by default for Release/RelWithDebInfo builds. For debug and other builds, we default to building for the host platform using -march=native. More importantly, in a fat runtime build, the compiler part of the HS library is built without a -march target so that it can run anywhere.

To force the fat runtime, enable FAT_RUNTIME in the CMake config.

[TidyHuang]

Thanks Mdb256, I firstly built with Release version and found a illegal instruction, but can't get detail information for the core information. So then I built a debug version to get detail core information.

-Tidy

[TidyHuang]

@mdb256 , if the binary process built with -march=native but hs shared library built with Release version, will cause illegal instruction coredump.

[TidyHuang]

built with release flag and binary process built without -march=native, will also trigger illegal instruction.

./CMakeFiles/CMakeOutput.log:59:Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux

[TidyHuang]

build log FAT_RUNTIME is off for release version, is it right
"./cbuild/libhs-prefix/src/libhs-build/CMakeCache.txt:180:FAT_RUNTIME:BOOL=OFF
./cbuild/libhs-prefix/src/libhs-build/config.h:19:/* #undef FAT_RUNTIME */

[mdb256]

If you've configured Hyperscan from scratch as a release build, then FAT_RUNTIME should be on. So you could try changing it to on and then rebuilding. CMake should pick up the change and reconfigure the build.

The only reason it might not be set is if a prerequisite has failed in previous checks, but it should be ok with gcc-4.8

[TidyHuang]

it works and FAT_RUNTIME is on now, the binary program linked the lib also needed without -march=native