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| author | Kostya Serebryany <kcc@google.com> | 2019-06-13 20:11:06 +0000 |
|---|---|---|
| committer | Kostya Serebryany <kcc@google.com> | 2019-06-13 20:11:06 +0000 |
| commit | 6ac86bdc1602faac865d13039fd000e9e5ef1f58 (patch) | |
| tree | 6638b4f732bbad93070eb5a5dc06b5d2758068da /lib/dfsan | |
| parent | 5387380520179d5fb5fd2575e8aed5be8cf52985 (diff) | |
| download | compiler-rt-6ac86bdc1602faac865d13039fd000e9e5ef1f58.tar.gz | |
[dfsan] Introduce dfsan_flush().
Summary:
dfsan_flush() allows to restart tain tracking from scratch in the same process.
The primary purpose right now is to allow more efficient data flow tracing
for DFT fuzzing: https://github.com/google/oss-fuzz/issues/1632
Reviewers: pcc
Reviewed By: pcc
Subscribers: delcypher, #sanitizers, llvm-commits
Tags: #llvm, #sanitizers
Differential Revision: https://reviews.llvm.org/D63037
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@363321 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/dfsan')
| -rw-r--r-- | lib/dfsan/dfsan.cc | 6 | ||||
| -rw-r--r-- | lib/dfsan/done_abilist.txt | 2 |
2 files changed, 8 insertions, 0 deletions
diff --git a/lib/dfsan/dfsan.cc b/lib/dfsan/dfsan.cc index b206908a5..237423192 100644 --- a/lib/dfsan/dfsan.cc +++ b/lib/dfsan/dfsan.cc @@ -421,6 +421,12 @@ static void dfsan_fini() { } } +extern "C" void dfsan_flush() { + UnmapOrDie((void*)ShadowAddr(), UnusedAddr() - ShadowAddr()); + if (!MmapFixedNoReserve(ShadowAddr(), UnusedAddr() - ShadowAddr())) + Die(); +} + static void dfsan_init(int argc, char **argv, char **envp) { InitializeFlags(); diff --git a/lib/dfsan/done_abilist.txt b/lib/dfsan/done_abilist.txt index 9765626ad..f8c88dd32 100644 --- a/lib/dfsan/done_abilist.txt +++ b/lib/dfsan/done_abilist.txt @@ -26,6 +26,8 @@ fun:dfsan_has_label_with_desc=uninstrumented fun:dfsan_has_label_with_desc=discard fun:dfsan_set_write_callback=uninstrumented fun:dfsan_set_write_callback=custom +fun:dfsan_flush=uninstrumented +fun:dfsan_flush=discard ############################################################################### # glibc |