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It was fragile to use the address of the body of the memory management functions to disable memory auditing within them. Functions called from these did not get exempted from the audits, so in some cases UserspaceEmulator reported bogus heap buffer overflows. Memory auditing did not work at all on Clang because when querying the addresses, their offset was taken relative to the base of `.text` which is not the first segment in the `R/RX/RW(RELRO)/RW(non-RELRO)` layout produced by LLD. Similarly to when setting metadata about the allocations, we now use the `emuctl` system call to selectively suppress auditing when we reach these functions. This ensures that functions called from `malloc` are affected too, and no issues occur because of the inconsistency between Clang and GCC memory layouts. |
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| .. | ||
| CMakeLists.txt | ||
| Emulator_syscalls.cpp | ||
| Emulator.cpp | ||
| Emulator.h | ||
| EmulatorControl.h | ||
| main.cpp | ||
| MallocTracer.cpp | ||
| MallocTracer.h | ||
| MmapRegion.cpp | ||
| MmapRegion.h | ||
| Range.cpp | ||
| Range.h | ||
| RangeAllocator.cpp | ||
| RangeAllocator.h | ||
| Region.cpp | ||
| Region.h | ||
| Report.h | ||
| SimpleRegion.cpp | ||
| SimpleRegion.h | ||
| SoftCPU.cpp | ||
| SoftCPU.h | ||
| SoftFPU.cpp | ||
| SoftFPU.h | ||
| SoftMMU.cpp | ||
| SoftMMU.h | ||
| ValueWithShadow.h | ||