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Merge pull request #4546 from OFFTKP/shmdt

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Make shmdt reset the unmapped pages in the 32-bit allocator
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Ryan Houdek authored and GitHub committed 2025-05-01 20:17:50 -07:00
2 parents 40e0a71f49 7d3699050e
commit cf5fcb2371
1 file changed
+13 -1
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Source/Tools/LinuxEmulation/LinuxSyscalls/LinuxAllocator.cpp
+13 -1
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@@ -514,8 +514,20 @@ uint64_t MemAllocator32Bit::Shmdt(const void* shmaddr) {
return -EINVAL;
}
int shmid = it->second;
struct shmid_ds buf {};
if (shmctl(shmid, IPC_STAT, &buf) == 0) {
size_t PagesLength = FEXCore::AlignUp(buf.shm_segsz, FEXCore::Utils::FEX_PAGE_SIZE) >> FEXCore::Utils::FEX_PAGE_SHIFT;
SetFreePages(AddrPage, PagesLength);
} else {
LOGMAN_MSG_A_FMT("Failed to get shm size during shmdt");
}
uint64_t Result = ::shmdt(shmaddr);
PageToShm.erase(it);
if (Result == 0) {
PageToShm.erase(it);
}
SYSCALL_ERRNO();
}