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-// -*- mode: C++ -*-
-
-// Copyright (c) 2010 Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// stackwalker_arm.h: arm-specific stackwalker.
-//
-// Provides stack frames given arm register context and a memory region
-// corresponding to an arm stack.
-//
-// Author: Mark Mentovai, Ted Mielczarek
-
-
-#ifndef PROCESSOR_STACKWALKER_ARM_H__
-#define PROCESSOR_STACKWALKER_ARM_H__
-
-#include "google_breakpad/common/breakpad_types.h"
-#include "google_breakpad/common/minidump_format.h"
-#include "google_breakpad/processor/stackwalker.h"
-
-namespace google_breakpad {
-
-class CodeModules;
-
-class StackwalkerARM : public Stackwalker {
- public:
- // context is an arm context object that gives access to arm-specific
- // register state corresponding to the innermost called frame to be
- // included in the stack. The other arguments are passed directly through
- // to the base Stackwalker constructor.
- StackwalkerARM(const SystemInfo* system_info,
- const MDRawContextARM* context,
- int fp_register,
- MemoryRegion* memory,
- const CodeModules* modules,
- StackFrameSymbolizer* frame_symbolizer);
-
- // Change the context validity mask of the frame returned by
- // GetContextFrame to VALID. This is only for use by unit tests; the
- // default behavior is correct for all application code.
- void SetContextFrameValidity(int valid) { context_frame_validity_ = valid; }
-
- private:
- // Implementation of Stackwalker, using arm context and stack conventions.
- virtual StackFrame* GetContextFrame();
- virtual StackFrame* GetCallerFrame(const CallStack* stack,
- bool stack_scan_allowed);
-
- // Use cfi_frame_info (derived from STACK CFI records) to construct
- // the frame that called frames.back(). The caller takes ownership
- // of the returned frame. Return NULL on failure.
- StackFrameARM* GetCallerByCFIFrameInfo(const vector<StackFrame*> &frames,
- CFIFrameInfo* cfi_frame_info);
-
- // Use the frame pointer. The caller takes ownership of the returned frame.
- // Return NULL on failure.
- StackFrameARM* GetCallerByFramePointer(const vector<StackFrame*> &frames);
-
- // Scan the stack for plausible return addresses. The caller takes ownership
- // of the returned frame. Return NULL on failure.
- StackFrameARM* GetCallerByStackScan(const vector<StackFrame*> &frames);
-
- // Stores the CPU context corresponding to the youngest stack frame, to
- // be returned by GetContextFrame.
- const MDRawContextARM* context_;
-
- // The register to use a as frame pointer. The value is -1 if frame pointer
- // cannot be used.
- int fp_register_;
-
- // Validity mask for youngest stack frame. This is always
- // CONTEXT_VALID_ALL in real use; it is only changeable for the sake of
- // unit tests.
- int context_frame_validity_;
-};
-
-
-} // namespace google_breakpad
-
-
-#endif // PROCESSOR_STACKWALKER_ARM_H__