b8e49fdcb1
Allow receiving memcpy/memset/memmove instrumentation by using __asan or __hwasan prefixed versions for AddressSanitizer and HWAddressSanitizer respectively when compiling in kernel mode, by passing params -asan-kernel-mem-intrinsic-prefix or -hwasan-kernel-mem-intrinsic-prefix. By default the kernel-specialized versions of both passes drop the prefixes for calls generated by memintrinsics. This assumes that all locations that can lower the intrinsics to libcalls can safely be instrumented. This unfortunately is not the case when implicit calls to memintrinsics are inserted by the compiler in no_sanitize functions [1]. To solve the issue, normal memcpy/memset/memmove need to be uninstrumented, and instrumented code should instead use the prefixed versions. This also aligns with ASan behaviour in user space. [1] https://lore.kernel.org/lkml/Yj2yYFloadFobRPx@lakrids/ Reviewed By: glider Differential Revision: https://reviews.llvm.org/D122724 |
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| .. | ||
| AddressSanitizer | ||
| BoundsChecking | ||
| DataFlowSanitizer | ||
| HWAddressSanitizer | ||
| HeapProfiler | ||
| InstrOrderFile | ||
| InstrProfiling | ||
| JustMyCode | ||
| MemorySanitizer | ||
| PoisonChecking | ||
| SanitizerCoverage | ||
| ThreadSanitizer | ||
| cgprofile.ll | ||