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b80965efc1
Previously, it called `::operator new` which may throw `std::bad_alloc`, regardless of whether LLVM itself was built with exception handling, and this can cause safety issues if outside code has destructors that will call back into LLVM. Now we use `::operator new(..., nothrow)` and call `llvm::report_bad_alloc_error` when allocation fails, which will abort when LLVM is built without exceptions. Ref: https://github.com/llvm/llvm-project/issues/85281
39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
//===- MemAlloc.cpp - Memory allocation functions -------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/MemAlloc.h"
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#include <new>
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// These are out of line to have __cpp_aligned_new not affect ABI.
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LLVM_ATTRIBUTE_RETURNS_NONNULL LLVM_ATTRIBUTE_RETURNS_NOALIAS void *
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llvm::allocate_buffer(size_t Size, size_t Alignment) {
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void *Result = ::operator new(Size,
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#ifdef __cpp_aligned_new
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std::align_val_t(Alignment),
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#endif
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std::nothrow);
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if (Result == nullptr) {
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report_bad_alloc_error("Buffer allocation failed");
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}
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return Result;
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}
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void llvm::deallocate_buffer(void *Ptr, size_t Size, size_t Alignment) {
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::operator delete(Ptr
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#ifdef __cpp_sized_deallocation
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,
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Size
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#endif
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#ifdef __cpp_aligned_new
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,
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std::align_val_t(Alignment)
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#endif
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);
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}
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