f340030577
This patch adds the implementation of the custom operator new functions. The implementation of the internal strdup has been updated to use operator new for allocation. We will make it a policy and document that all allocations have to go through the libc's own operator new. A future change will also add operator delete replacements and make it a policy that deallocations in libc internal code have to go through those replacements. Reviewed By: lntue Differential Revision: https://reviews.llvm.org/D139584
38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
//===-- Allocating string utils ---------------------------------*- C++ -*-===//
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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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#ifndef LIBC_SRC_STRING_ALLOCATING_STRING_UTILS_H
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#define LIBC_SRC_STRING_ALLOCATING_STRING_UTILS_H
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#include "src/__support/CPP/new.h"
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#include "src/__support/CPP/optional.h"
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#include "src/string/memory_utils/memcpy_implementations.h" // For string_length
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#include "src/string/string_utils.h"
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#include <stddef.h> // For size_t
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namespace __llvm_libc {
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namespace internal {
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cpp::optional<char *> strdup(const char *src) {
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if (src == nullptr)
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return cpp::nullopt;
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size_t len = string_length(src) + 1;
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AllocChecker ac;
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char *newstr = new (ac) char[len];
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if (!ac)
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return cpp::nullopt;
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inline_memcpy(newstr, src, len);
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return newstr;
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}
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} // namespace internal
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} // namespace __llvm_libc
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#endif
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