9fcb91b3eb
Summary: It looks like clang was generating somewhat weird assembly with the current code. `FromPrimary`, even though `const`, was replaced every time with the code generated for `size <= SizeClassMap::kMaxSize` instead of using a variable or register, and `FromPrimary` didn't induce `ClassId != 0` for the compiler, so a dead branch was generated for `getActuallyAllocatedSize(Ptr, ClassId)` since it's never called for `ClassId = 0` (Secondary backed allocations) [this one was more wishful thinking on my side than anything else]. I rearranged the code bit so that the generated assembly is less clunky. Also changed 2 whitespace inconsistencies that were bothering me. Reviewers: alekseyshl, flowerhack Reviewed By: flowerhack Subscribers: llvm-commits, #sanitizers Differential Revision: https://reviews.llvm.org/D40976 llvm-svn: 320160
38 lines
958 B
C++
38 lines
958 B
C++
//===-- scudo_utils.h -------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// Header for scudo_utils.cpp.
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///
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//===----------------------------------------------------------------------===//
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#ifndef SCUDO_UTILS_H_
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#define SCUDO_UTILS_H_
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#include "sanitizer_common/sanitizer_common.h"
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#include <string.h>
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namespace __scudo {
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template <class Dest, class Source>
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INLINE Dest bit_cast(const Source& source) {
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static_assert(sizeof(Dest) == sizeof(Source), "Sizes are not equal!");
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Dest dest;
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memcpy(&dest, &source, sizeof(dest));
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return dest;
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}
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void NORETURN dieWithMessage(const char *Format, ...);
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bool hasHardwareCRC32();
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} // namespace __scudo
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#endif // SCUDO_UTILS_H_
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