stackwalker_x86.h revision 7daf246e4baf0837e25429668cc23e92b6afe3b3 
1// Copyright (c) 2006, Google Inc.
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29
30// stackwalker_x86.h: x86-specific stackwalker.
31//
32// Provides stack frames given x86 register context and a memory region
33// corresponding to an x86 stack.
34//
35// Author: Mark Mentovai
36
37
38#ifndef PROCESSOR_STACKWALKER_X86_H__
39#define PROCESSOR_STACKWALKER_X86_H__
40
41
42#include "google/airbag_types.h"
43#include "processor/stackwalker.h"
44#include "processor/minidump_format.h"
45
46
47namespace google_airbag {
48
49
50class MinidumpContext;
51class MinidumpModuleList;
52
53
54class StackwalkerX86 : public Stackwalker {
55 public:
56  // context is a MinidumpContext object that gives access to x86-specific
57  // register state corresponding to the innermost called frame to be
58  // included in the stack.  The other arguments are passed directly through
59  // to the base Stackwalker constructor.
60  StackwalkerX86(MinidumpContext*    context,
61                 MemoryRegion*       memory,
62                 MinidumpModuleList* modules,
63                 SymbolSupplier*     supplier);
64
65 private:
66  // Implementation of Stackwalker, using x86 context (%ebp, %eip) and
67  // stack conventions (saved %ebp at [%ebp], saved %eip at 4[%ebp]).
68  virtual bool GetContextFrame(StackFrame* frame);
69  virtual bool GetCallerFrame(StackFrame* frame);
70
71  // Stores the CPU context corresponding to the innermost stack frame to
72  // be returned by GetContextFrame.
73  const MDRawContextX86* context_;
74
75  // Stores the frame pointer returned in the last stack frame returned by
76  // GetContextFrame or GetCallerFrame.
77  u_int32_t              last_frame_pointer_;
78};
79
80
81} // namespace google_airbag
82
83
84#endif // PROCESSOR_STACKWALKER_X86_H__
85