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[Bug] Use ReadWrite scope to fill memory in JitAllocator::shrink() (MAP_JIT)

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kobalicek
2023-02-27 20:41:08 +01:00
parent 965d19506f
commit c87476dd5d
1 changed files with 7 additions and 2 deletions
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9
src/asmjit/core/jitallocator.cpp
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@@ -915,8 +915,13 @@ Error JitAllocator::shrink(void* rxPtr, size_t newSize) noexcept {
block->markShrunkArea(areaStart + areaShrunkSize, areaEnd);
// Fill released memory if the secure mode is enabled.
if (Support::test(impl->options, JitAllocatorOptions::kFillUnusedMemory))
JitAllocatorImpl_fillPattern(block->rwPtr() + (areaStart + areaShrunkSize) * pool->granularity, fillPattern(), areaDiff * pool->granularity);
if (Support::test(impl->options, JitAllocatorOptions::kFillUnusedMemory)) {
uint8_t* spanPtr = block->rwPtr() + (areaStart + areaShrunkSize) * pool->granularity;
size_t spanSize = areaDiff * pool->granularity;
VirtMem::ProtectJitReadWriteScope scope(spanPtr, spanSize);
JitAllocatorImpl_fillPattern(spanPtr, fillPattern(), spanSize);
}
}
return kErrorOk;