llvm-project.git/compiler-rt/lib/fuzzer/dataflow/DataFlow.cpp, branch main

[libfuzzer] Disable failing DFSan-related tests

2021-06-19T01:09:19+00:00

These have been broken by https://reviews.llvm.org/D104494.
However, `lib/fuzzer/dataflow/` is unused (?) so addressing this is not a priority.

Added TODOs to re-enable them in the future.

Reviewed By: stephan.yichao.zhao

Differential Revision: https://reviews.llvm.org/D104568

[dfsan] Add full fast8 support

2021-06-08T00:20:54+00:00

Complete support for fast8:
- amend shadow size and mapping in runtime
- remove fast16 mode and -dfsan-fast-16-labels flag
- remove legacy mode and make fast8 mode the default
- remove dfsan-fast-8-labels flag
- remove functions in dfsan interface only applicable to legacy
- remove legacy-related instrumentation code and tests
- update documentation.

Reviewed By: stephan.yichao.zhao, browneee

Differential Revision: https://reviews.llvm.org/D103745

[DFSan] Add efficient fast16labels instrumentation mode.

2020-07-29T18:58:47+00:00

Adds the -fast-16-labels flag, which enables efficient instrumentation
for DFSan when the user needs <=16 labels.  The instrumentation
eliminates most branches and most calls to __dfsan_union or
__dfsan_union_load.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D84371

[libFuzzer] split DataFlow.cpp into two .cpp files, one of which can be compiled w/o dfsan to speed things up (~25% speedup)

2019-06-21T01:39:35+00:00

llvm-svn: 364002

[libFuzzer] ensure that DFT and autofocus works for C++ (mangled) functions

2019-06-20T01:48:45+00:00

llvm-svn: 363905

[libFuzzer] simplify the DFT trace collection using the new faster DFSan mode that traces up to 16 labels at a time and never runs out of labels. Second attempt. This time with a fix for windows (putenv instead of setenv))

2019-06-14T19:54:32+00:00

llvm-svn: 363445

Revert r363326 "[libFuzzer] simplify the DFT trace collection using the new faster DFSan mode that traces up to 16 labels at a time and never runs out of labels."

2019-06-14T07:32:22+00:00

It broke the Windows build:

C:\b\s\w\ir\cache\builder\src\third_party\llvm\compiler-rt\lib\fuzzer\FuzzerDataFlowTrace.cpp(243): error C3861: 'setenv': identifier not found

This also reverts the follow-up r363327.

llvm-svn: 363358

[libFuzzer] simplify the DFT trace collection using the new faster DFSan mode that traces up to 16 labels at a time and never runs out of labels.

2019-06-13T21:17:49+00:00

llvm-svn: 363326

[libFuzzer] DFT: when dumping coverage, also dump the total number of instrumented blocks in a function; update merge_data_flow.py to merge coverage

2019-05-08T17:20:09+00:00

llvm-svn: 360272

[libFuzzer] extend the data flow tracer to also produce basic block coverage for every input. An extended test coming in a separte change.

2019-05-08T00:51:15+00:00

llvm-svn: 360213