mirror of
https://github.com/dart-lang/sdk
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3a668dcf03
Fixes https://github.com/dart-lang/sdk/issues/52045 TEST=ffi_induce_a_crash_test Change-Id: Ic047df10732d6ff8cf695ce098d80ec3a098dbf9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/302380 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Alexander Aprelev <aam@google.com>
95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
// Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Class for patching compiled code.
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#ifndef RUNTIME_PLATFORM_UNWINDING_RECORDS_H_
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#define RUNTIME_PLATFORM_UNWINDING_RECORDS_H_
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#include "platform/allocation.h"
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namespace dart {
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class UnwindingRecordsPlatform : public AllStatic {
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public:
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static void Init();
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static void Cleanup();
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static intptr_t SizeInBytes();
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static void RegisterExecutableMemory(void* start,
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intptr_t size,
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void** pp_dynamic_table);
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static void UnregisterDynamicTable(void* p_dynamic_table);
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static void* GetAddGrowableFunctionTableFunc();
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static void* GetDeleteGrowableFunctionTableFunc();
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};
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#if defined(DART_HOST_OS_WINDOWS) && defined(TARGET_ARCH_X64)
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#pragma pack(push, 1)
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//
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// Refer to https://learn.microsoft.com/en-us/cpp/build/exception-handling-x64
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//
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typedef unsigned char UBYTE;
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typedef union _UNWIND_CODE {
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struct {
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UBYTE CodeOffset;
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UBYTE UnwindOp : 4;
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UBYTE OpInfo : 4;
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};
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USHORT FrameOffset;
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} UNWIND_CODE, *PUNWIND_CODE;
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typedef struct _UNWIND_INFO {
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UBYTE Version : 3;
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UBYTE Flags : 5;
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UBYTE SizeOfProlog;
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UBYTE CountOfCodes;
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UBYTE FrameRegister : 4;
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UBYTE FrameOffset : 4;
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UNWIND_CODE UnwindCode[2];
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} UNWIND_INFO, *PUNWIND_INFO;
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static constexpr int kPushRbpInstructionLength = 1;
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static const int kMovRbpRspInstructionLength = 3;
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static constexpr int kRbpPrefixLength =
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kPushRbpInstructionLength + kMovRbpRspInstructionLength;
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static constexpr int kRBP = 5;
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struct GeneratedCodeUnwindInfo {
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UNWIND_INFO unwind_info;
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GeneratedCodeUnwindInfo() {
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unwind_info.Version = 1;
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unwind_info.Flags = UNW_FLAG_NHANDLER;
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unwind_info.SizeOfProlog = kRbpPrefixLength;
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unwind_info.CountOfCodes = 2;
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unwind_info.FrameRegister = kRBP;
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unwind_info.FrameOffset = 0;
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unwind_info.UnwindCode[0].CodeOffset = kRbpPrefixLength;
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unwind_info.UnwindCode[0].UnwindOp = 3; // UWOP_SET_FPREG
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unwind_info.UnwindCode[0].OpInfo = 0;
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unwind_info.UnwindCode[1].CodeOffset = kPushRbpInstructionLength;
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unwind_info.UnwindCode[1].UnwindOp = 0; // UWOP_PUSH_NONVOL
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unwind_info.UnwindCode[1].OpInfo = kRBP;
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}
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};
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struct CodeRangeUnwindingRecord {
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void* dynamic_table;
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uint32_t runtime_function_count;
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GeneratedCodeUnwindInfo unwind_info;
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intptr_t exception_handler;
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RUNTIME_FUNCTION runtime_function[1];
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};
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#pragma pack(pop)
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#endif // defined(DART_HOST_OS_WINDOWS) && defined(TARGET_ARCH_X64)
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} // namespace dart
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#endif // RUNTIME_PLATFORM_UNWINDING_RECORDS_H_
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