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48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
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// Copyright 2015 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CRASHPAD_CLIENT_CAPTURE_CONTEXT_WIN_H_
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#define CRASHPAD_CLIENT_CAPTURE_CONTEXT_WIN_H_
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#include <windows.h>
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namespace crashpad {
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//! \brief Saves the CPU context.
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//!
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//! The CPU context will be captured as accurately and completely as possible,
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//! containing an atomic snapshot at the point of this function’s return. This
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//! function does not modify any registers.
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//!
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//! This function captures all integer registers as well as the floating-point
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//! and vector (SSE) state. It does not capture debug registers, which are
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//! inaccessible by user code.
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//!
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//! This function is a replacement for `RtlCaptureContext()`, which contains
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//! bugs and limitations. On 32-bit x86, `RtlCaptureContext()` requires that
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//! `ebp` be used as a frame pointer, and returns `ebp`, `esp`, and `eip` out of
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//! sync with the other registers. Both the 32-bit x86 and 64-bit x86_64
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//! versions of `RtlCaptureContext()` capture only the state of the integer
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//! registers, ignoring floating-point and vector state.
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//!
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//! \param[out] context The structure to store the context in.
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//!
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//! \note On x86_64, the value for `rcx` will be populated with the address of
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//! this function’s argument, as mandated by the ABI.
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void CaptureContext(CONTEXT* context);
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} // namespace crashpad
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#endif // CRASHPAD_CLIENT_CAPTURE_CONTEXT_WIN_H_
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