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Fix bug with unmapping before reserve

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This commit is contained in:
Stephen Miller 2025-01-07 01:16:56 -06:00
parent 09b683bc50
commit 7e7027880b
1 changed files with 4 additions and 2 deletions
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6
src/core/memory.cpp
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@ -171,10 +171,11 @@ int MemoryManager::PoolReserve(void** out_addr, VAddr virtual_addr, size_t size,
// Fixed mapping means the virtual address must exactly match the provided one.
if (True(flags & MemoryMapFlags::Fixed)) {
const auto& vma = FindVMA(mapped_addr)->second;
auto& vma = FindVMA(mapped_addr)->second;
// If the VMA is mapped, unmap the region first.
if (vma.IsMapped()) {
UnmapMemoryImpl(mapped_addr, size);
vma = FindVMA(mapped_addr)->second;
}
const size_t remaining_size = vma.base + vma.size - mapped_addr;
ASSERT_MSG(vma.type == VMAType::Free && remaining_size >= size);
@ -208,10 +209,11 @@ int MemoryManager::Reserve(void** out_addr, VAddr virtual_addr, size_t size, Mem
// Fixed mapping means the virtual address must exactly match the provided one.
if (True(flags & MemoryMapFlags::Fixed)) {
const auto& vma = FindVMA(mapped_addr)->second;
auto& vma = FindVMA(mapped_addr)->second;
// If the VMA is mapped, unmap the region first.
if (vma.IsMapped()) {
UnmapMemoryImpl(mapped_addr, size);
vma = FindVMA(mapped_addr)->second;
}
const size_t remaining_size = vma.base + vma.size - mapped_addr;
ASSERT_MSG(vma.type == VMAType::Free && remaining_size >= size);