Now that we have the sanitizer metadata that is actually on the global
variable, and now that we use debuginfo in order to do symbolization of
globals, we can delete the 'llvm.asan.globals' IR synthesis.
This patch deletes the 'location' part of the __asan_global that's
embedded in the binary as well, because it's unnecessary. This saves
about ~1.7% of the optimised non-debug with-asserts clang binary.
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D127911
Small patch that changes blacklisted_global to blocked_global and a change in comments.
Reviewed By: pgousseau
Differential Revision: https://reviews.llvm.org/D113692
Currently 1 byte global object has a ridiculous 63 bytes redzone.
This patch reduces the redzone size to be less than 32 if the size of global object is less than or equal to half of 32 (the minimal size of redzone).
A 12 bytes object has a 20 bytes redzone, a 20 bytes object has a 44 bytes redzone.
Reviewed By: MaskRay, #sanitizers, vitalybuka
Differential Revision: https://reviews.llvm.org/D102469
Using $ breaks demangling of the symbols. For example,
$ c++filt _Z3foov\$123
_Z3foov$123
This causes problems for developers who would like to see nice stack traces
etc., but also for automatic crash tracking systems which try to organize
crashes based on the stack traces.
Instead, use the period as suffix separator, since Itanium demanglers normally
ignore such suffixes:
$ c++filt _Z3foov.123
foo() [clone .123]
This is already done in some places; try to do it everywhere.
Differential revision: https://reviews.llvm.org/D97484
Putting globals in a comdat for dead-stripping changes the semantic and
can potentially cause false negative odr violations at link time.
If odr indicators are used, we keep the comdat sections, as link time
odr violations will be dectected for the odr indicator symbols.
This fixes PR 47925
Mitch Phillips