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[flang] Fix excess allocation #96663

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Merged
merged 1 commit into from
Jun 28, 2024
Merged

[flang] Fix excess allocation #96663

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4 changes: 2 additions & 2 deletions flang/runtime/pointer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -127,7 +127,7 @@ void RTDEF(PointerAssociateRemapping)(Descriptor &pointer,
RT_API_ATTRS void *AllocateValidatedPointerPayload(std::size_t byteSize) {
// Add space for a footer to validate during deallocation.
constexpr std::size_t align{sizeof(std::uintptr_t)};
byteSize = ((byteSize / align) + 1) * align;
byteSize = ((byteSize + align - 1) / align) * align;
std::size_t total{byteSize + sizeof(std::uintptr_t)};
void *p{std::malloc(total)};
if (p) {
Expand Down Expand Up @@ -197,7 +197,7 @@ static RT_API_ATTRS std::size_t GetByteSize(
bool RT_API_ATTRS ValidatePointerPayload(const ISO::CFI_cdesc_t &desc) {
std::size_t byteSize{GetByteSize(desc)};
constexpr std::size_t align{sizeof(std::uintptr_t)};
byteSize = ((byteSize / align) + 1) * align;
byteSize = ((byteSize + align - 1) / align) * align;
const void *p{desc.base_addr};
const std::uintptr_t *footer{reinterpret_cast<const std::uintptr_t *>(
static_cast<const char *>(p) + byteSize)};
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