mirror of
https://github.com/RPCS3/llvm.git
synced 2026-01-31 01:25:19 +01:00
6b547686c5
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8
81 lines
3.5 KiB
C++
81 lines
3.5 KiB
C++
//===- ASanStackFrameLayout.h - ComputeASanStackFrameLayout -----*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This header defines ComputeASanStackFrameLayout and auxiliary data structs.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#ifndef LLVM_TRANSFORMS_UTILS_ASANSTACKFRAMELAYOUT_H
|
|
#define LLVM_TRANSFORMS_UTILS_ASANSTACKFRAMELAYOUT_H
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
|
|
namespace llvm {
|
|
|
|
class AllocaInst;
|
|
|
|
// These magic constants should be the same as in
|
|
// in asan_internal.h from ASan runtime in compiler-rt.
|
|
static const int kAsanStackLeftRedzoneMagic = 0xf1;
|
|
static const int kAsanStackMidRedzoneMagic = 0xf2;
|
|
static const int kAsanStackRightRedzoneMagic = 0xf3;
|
|
static const int kAsanStackUseAfterReturnMagic = 0xf5;
|
|
static const int kAsanStackUseAfterScopeMagic = 0xf8;
|
|
|
|
// Input/output data struct for ComputeASanStackFrameLayout.
|
|
struct ASanStackVariableDescription {
|
|
const char *Name; // Name of the variable that will be displayed by asan
|
|
// if a stack-related bug is reported.
|
|
uint64_t Size; // Size of the variable in bytes.
|
|
size_t LifetimeSize; // Size in bytes to use for lifetime analysis check.
|
|
// Will be rounded up to Granularity.
|
|
size_t Alignment; // Alignment of the variable (power of 2).
|
|
AllocaInst *AI; // The actual AllocaInst.
|
|
size_t Offset; // Offset from the beginning of the frame;
|
|
// set by ComputeASanStackFrameLayout.
|
|
unsigned Line; // Line number.
|
|
};
|
|
|
|
// Output data struct for ComputeASanStackFrameLayout.
|
|
struct ASanStackFrameLayout {
|
|
size_t Granularity; // Shadow granularity.
|
|
size_t FrameAlignment; // Alignment for the entire frame.
|
|
size_t FrameSize; // Size of the frame in bytes.
|
|
};
|
|
|
|
ASanStackFrameLayout ComputeASanStackFrameLayout(
|
|
// The array of stack variables. The elements may get reordered and changed.
|
|
SmallVectorImpl<ASanStackVariableDescription> &Vars,
|
|
// AddressSanitizer's shadow granularity. Usually 8, may also be 16, 32, 64.
|
|
size_t Granularity,
|
|
// The minimal size of the left-most redzone (header).
|
|
// At least 4 pointer sizes, power of 2, and >= Granularity.
|
|
// The resulting FrameSize should be multiple of MinHeaderSize.
|
|
size_t MinHeaderSize);
|
|
|
|
// Compute frame description, see DescribeAddressIfStack in ASan runtime.
|
|
SmallString<64> ComputeASanStackFrameDescription(
|
|
const SmallVectorImpl<ASanStackVariableDescription> &Vars);
|
|
|
|
// Returns shadow bytes with marked red zones. This shadow represents the state
|
|
// if the stack frame when all local variables are inside of the own scope.
|
|
SmallVector<uint8_t, 64>
|
|
GetShadowBytes(const SmallVectorImpl<ASanStackVariableDescription> &Vars,
|
|
const ASanStackFrameLayout &Layout);
|
|
|
|
// Returns shadow bytes with marked red zones and after scope. This shadow
|
|
// represents the state if the stack frame when all local variables are outside
|
|
// of the own scope.
|
|
SmallVector<uint8_t, 64> GetShadowBytesAfterScope(
|
|
// The array of stack variables. The elements may get reordered and changed.
|
|
const SmallVectorImpl<ASanStackVariableDescription> &Vars,
|
|
const ASanStackFrameLayout &Layout);
|
|
|
|
} // llvm namespace
|
|
|
|
#endif // LLVM_TRANSFORMS_UTILS_ASANSTACKFRAMELAYOUT_H
|