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| author | Kuba Brecka <kuba.brecka@gmail.com> | 2016-10-31 18:51:58 +0000 |
|---|---|---|
| committer | Kuba Brecka <kuba.brecka@gmail.com> | 2016-10-31 18:51:58 +0000 |
| commit | a28c9e8f09c9d86cab16a1a97f0f09179a2c18ce (patch) | |
| tree | 61b493056514209e137048dbf5fd197dc5a68aa5 /llvm/lib/CodeGen/SelectionDAG/SelectionDAGTargetInfo.cpp | |
| parent | e7b54c2ea5540f456fa77423a53902ed212b0994 (diff) | |
| download | bcm5719-llvm-a28c9e8f09c9d86cab16a1a97f0f09179a2c18ce.tar.gz bcm5719-llvm-a28c9e8f09c9d86cab16a1a97f0f09179a2c18ce.zip | |
[asan] Move instrumented null-terminated strings to a special section, LLVM part
On Darwin, simple C null-terminated constant strings normally end up in the __TEXT,__cstring section of the resulting Mach-O binary. When instrumented with ASan, these strings are transformed in a way that they cannot be in __cstring (the linker unifies the content of this section and strips extra NUL bytes, which would break instrumentation), and are put into a generic __const section. This breaks some of the tools that we have: Some tools need to scan all C null-terminated strings in Mach-O binaries, and scanning all the contents of __const has a large performance penalty. This patch instead introduces a special section, __asan_cstring which will now hold the instrumented null-terminated strings.
Differential Revision: https://reviews.llvm.org/D25026
llvm-svn: 285619
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAGTargetInfo.cpp')
0 files changed, 0 insertions, 0 deletions
