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| author | Kuba Brecka <kuba.brecka@gmail.com> | 2016-10-31 18:52:32 +0000 |
|---|---|---|
| committer | Kuba Brecka <kuba.brecka@gmail.com> | 2016-10-31 18:52:32 +0000 |
| commit | bf6e7848a0e26fa855ce8330dfda04dd4aca83bd (patch) | |
| tree | 6e33e3141df0bc8b0693afcc484e119a49476543 /llvm/lib/CodeGen/SelectionDAG | |
| parent | a28c9e8f09c9d86cab16a1a97f0f09179a2c18ce (diff) | |
| download | bcm5719-llvm-bf6e7848a0e26fa855ce8330dfda04dd4aca83bd.tar.gz bcm5719-llvm-bf6e7848a0e26fa855ce8330dfda04dd4aca83bd.zip | |
[asan] Move instrumented null-terminated strings to a special section, compiler-rt 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: 285620
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG')
0 files changed, 0 insertions, 0 deletions
