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Alastair Houghton
29a63e572a
`DebugActiveProcess()` can fail under certain circumstances, which results in us not seeing the crashing thread, hence you don't get a backtrace (in fact, the backtracer used to crash, since we never expected to be in that situation). Instead, use `NtQuerySystemInformation()` to get the thread list, then `OpenProcess()` and `OpenThread()` to get process/thread handles. This should be more robust. rdar://171438432
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
//===--- WinNTInternals.h - Windows specifics -------------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2026 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Definitions of some NT internal functions that we make use of.
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//
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// This is technically naughty, but it is more robust than using the
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// DebugActiveProcess() API, which sometimes appears to fail to work.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_BACKTRACING_WINNT_INTERNALS_H
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#define SWIFT_BACKTRACING_WINNT_INTERNALS_H
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#ifdef _WIN32
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#include <windows.h>
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#include <winternl.h>
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#ifndef STATUS_INFO_LENGTH_MISMATCH
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#define STATUS_INFO_LENGTH_MISMATCH ((DWORD)0xC0000004L)
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#endif
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typedef __kernel_entry NTSTATUS (NTAPI *PNT_QUERY_SYSTEM_INFORMATION)(
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SYSTEM_INFORMATION_CLASS,
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PVOID,
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ULONG,
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PULONG
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);
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typedef __kernel_entry NTSTATUS (NTAPI *PNT_SUSPEND_PROCESS)(
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HANDLE
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);
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typedef __kernel_entry NTSTATUS (NTAPI *PNT_RESUME_PROCESS)(
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HANDLE
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);
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#endif
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#endif // SWIFT_BACKTRACING_WINNT_INTERNALS_H
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