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| author | Matt Morehouse <mascasa@google.com> | 2020-08-14 11:43:33 -0700 |
|---|---|---|
| committer | Matt Morehouse <mascasa@google.com> | 2020-08-14 11:43:49 -0700 |
| commit | bb3a3da38d01cd5639b502ec3979d201d59f1950 (patch) | |
| tree | e7394fac7e04f0e9efd1227b85e6b4803ec0c8a1 /llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp | |
| parent | 65049f9b7934d6282fe599b29f44f93507148a9d (diff) | |
| download | llvm-bb3a3da38d01cd5639b502ec3979d201d59f1950.zip llvm-bb3a3da38d01cd5639b502ec3979d201d59f1950.tar.gz llvm-bb3a3da38d01cd5639b502ec3979d201d59f1950.tar.bz2 | |
[DFSan] Don't unmap during dfsan_flush().
Unmapping and remapping is dangerous since another thread could touch
the shadow memory while it is unmapped. But there is really no need to
unmap anyway, since mmap(MAP_FIXED) will happily clobber the existing
mapping with zeroes. This is thread-safe since the mmap() is done under
the same kernel lock as page faults are done.
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D85947
Diffstat (limited to 'llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp')
0 files changed, 0 insertions, 0 deletions