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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2017-11-10 22:27:48 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2017-11-10 22:27:48 +0000 |
| commit | 8357d02f2d4f6c22202fb25f3b4c97fb2b893ec9 (patch) | |
| tree | 0d96828a1cf600d29c8d473da77d633ec7b166c5 /lib/sanitizer_common/sanitizer_flags.h | |
| parent | 55dee3e7a884bf78e0f8932ff7eaac6f614866fa (diff) | |
[asan] Use dynamic shadow on 32-bit Android.
Summary:
The following kernel change has moved ET_DYN base to 0x4000000 on arm32:
https://marc.info/?l=linux-kernel&m=149825162606848&w=2
Switch to dynamic shadow base to avoid such conflicts in the future.
Reserve shadow memory in an ifunc resolver, but don't use it in the instrumentation
until PR35221 is fixed. This will eventually let use save one load per function.
Reviewers: kcc
Subscribers: aemerson, srhines, kubamracek, kristof.beyls, hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D39393
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@317943 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/sanitizer_common/sanitizer_flags.h')
| -rw-r--r-- | lib/sanitizer_common/sanitizer_flags.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/sanitizer_common/sanitizer_flags.h b/lib/sanitizer_common/sanitizer_flags.h index c2ec29d16..f42d21931 100644 --- a/lib/sanitizer_common/sanitizer_flags.h +++ b/lib/sanitizer_common/sanitizer_flags.h @@ -34,7 +34,9 @@ struct CommonFlags { }; // Functions to get/set global CommonFlags shared by all sanitizer runtimes: -extern CommonFlags common_flags_dont_use; +// FIXME: hidden needed for asan_premap_shadow. Consider building with +// -fvisibility=hidden. +extern CommonFlags common_flags_dont_use __attribute__((visibility("hidden"))); inline const CommonFlags *common_flags() { return &common_flags_dont_use; } |