forked from OSchip/llvm-project
e67cbac812
Implement protection against the stack clash attack [0] through inline stack
probing.
Probe stack allocation every PAGE_SIZE during frame lowering or dynamic
allocation to make sure the page guard, if any, is touched when touching the
stack, in a similar manner to GCC[1].
This extends the existing `probe-stack' mechanism with a special value `inline-asm'.
Technically the former uses function call before stack allocation while this
patch provides inlined stack probes and chunk allocation.
Only implemented for x86.
[0] https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
[1] https://gcc.gnu.org/ml/gcc-patches/2017-07/msg00556.html
This a recommit of
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| .. | ||
| ToolChains | ||
| Action.cpp | ||
| CMakeLists.txt | ||
| Compilation.cpp | ||
| DarwinSDKInfo.cpp | ||
| Distro.cpp | ||
| Driver.cpp | ||
| DriverOptions.cpp | ||
| InputInfo.h | ||
| Job.cpp | ||
| Multilib.cpp | ||
| OptionUtils.cpp | ||
| Phases.cpp | ||
| SanitizerArgs.cpp | ||
| Tool.cpp | ||
| ToolChain.cpp | ||
| Types.cpp | ||
| XRayArgs.cpp | ||