When writing a label to shadow memory, don't write if the value is already set to the value being written. This dramatically reduces real memory consumption in programs with sparse use of labels.
Test Plan: It would be nice to test that unnecessary writes are skipped, but I do not see how a unit test could do this.
Patch by Sam Kerner!
Differential Revision: http://reviews.llvm.org/D4894
llvm-svn: 215961
Get rid of ASAN_USE_PREINIT_ARRAY and LSAN_USE_PREINIT_ARRAY - just always
use .preinit_array if it's available. This mode seems stable enough, and
we've been relying on default values of these macro for a long time.
llvm-svn: 213980
Expose the number of DFSan labels allocated by adding function dfsan_get_label_count().
Patch by Sam Kerner!
Differential Revision: http://llvm-reviews.chandlerc.com/D3109
llvm-svn: 204854
Extend ParseFlag to accept the |description| parameter, add dummy values for all existing flags.
As the flags are parsed their descriptions are stored in a global linked list.
The tool can later call __sanitizer::PrintFlagDescriptions() to dump all the flag names and their descriptions.
Add the 'help' flag and make ASan, TSan and MSan print the flags if 'help' is set to 1.
llvm-svn: 204339
Summary:
Definitions we use in public sanitizer headers may
slightly conflict with the ones we use in private sanitizer runtimes.
Moreover, we generally forbid to include any system headers (like <stdint.h>)
in sanitizer runtime headers. This leads to inevitable duplication of selected
interface function declarations, but we decided to live with it.
Reviewers: pcc
Reviewed By: pcc
CC: kcc, llvm-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D2179
llvm-svn: 194955
DataFlowSanitizer is a generalised dynamic data flow analysis.
Unlike other Sanitizer tools, this tool is not designed to detect a
specific class of bugs on its own. Instead, it provides a generic
dynamic data flow analysis framework to be used by clients to help
detect application-specific issues within their own code.
Differential Revision: http://llvm-reviews.chandlerc.com/D967
llvm-svn: 187924
Lorenzo Martignoni