Summary:
This patch contains various fixes for the unwinding and backtrace machinery on the SPARC, which doesn't work correctly in various cases. It was tested with GCC on SPARC/Solaris and SPARC/Linux.
Patch by Eric Botcazou.
Reviewers: #sanitizers, vitalybuka
Reviewed By: #sanitizers, vitalybuka
Subscribers: jrtc27, delcypher, vitalybuka, ro, jyknight, kubamracek, fedor.sergeev, jdoerfert, llvm-commits, #sanitizers
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D58431
llvm-svn: 355965
FastUnwindStack -> UnwindFast
SlowUnwindStack -> UnwindSlow
Stack is redundant, verb should come first.
SlowUnwindStackWithContext(uptr pc, void *context, u32 max_depth) ->
SlowUnwindStack
WithContext is redundant, since it is a required parameter.
Reviewers: vitalybuka
Differential Revision: https://reviews.llvm.org/D58551
llvm-svn: 354696
to reflect the new license.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351636
While testing my to-be-submitted Solaris sanitizer support on gcc mainline, I ran into
an issue on Solaris/SPARC (sparc-sun-solaris2.11). Initially libasan.so failed to link:
Undefined first referenced
symbol in file
__sanitizer::BufferedStackTrace::FastUnwindStack(unsigned long, unsigned long, unsigned long, unsigned long, unsigned int) /var/gcc/gcc-9.0.0-20181024/11.5-gcc-gas/sparc-sun-solaris2.11/./libsanitizer/asan/.libs/libasan.so
This happens because SANITIZER_CAN_FAST_UNWIND is enabled on non-Linux
SPARC targets (cf. sanitizer_stacktrace.h), but the guard around the SPARCv8-only
definition in sanitizer_stacktrace_sparc.cc only works with clang:
clang predefines __sparcv8__ on non-Solaris, and __sparcv8 only on Solaris
gcc predefines __sparcv8 on Solaris, but __sparc_v8__ on non-Solaris
The attached patch allows for all three variants.
However, disabling SANITIZER_CAN_FAST_UNWIND on all SPARC targets
fixes a couple of testsuite failures in the Solaris asan testsuite, so for now it's better
to keep it disabled everywhere.
This allowed the libsanitizer build to complete and gave reasonable (though slightly
worse than on Solaris/x86) testsuite results.
Differential Revision: https://reviews.llvm.org/D54099
llvm-svn: 346155
Vitaly Buka