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UserspaceEmulator: Mark mmap regions as malloc blocks when mallocing

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We don't have to be clever at all to figure out which MmapRegions are
malloc blocks, we can just mark the containing region as such when
the emulated process performs a malloc! :^)
This commit is contained in:
Andreas Kling 2020-08-01 09:13:45 +02:00
parent 5de7bae383
commit 030edbd513
3 changed files with 7 additions and 8 deletions
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4
DevTools/UserspaceEmulator/MallocTracer.cpp
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@ -44,6 +44,10 @@ void MallocTracer::target_did_malloc(Badge<SoftCPU>, FlatPtr address, size_t siz
ASSERT(region);
ASSERT(region->is_mmap());
auto& mmap_region = static_cast<MmapRegion&>(*region);
// Mark the containing mmap region as a malloc block!
mmap_region.set_malloc(true);
auto* shadow_bits = mmap_region.shadow_data() + address - mmap_region.base();
memset(shadow_bits, 0, size);