Rename Airbag to Breakpad.

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@122 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/google_breakpad/processor/stackwalker.h

@@ -0,0 +1,140 @@
+// Copyright (c) 2006, 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.h: Generic stackwalker.
+//
+// The Stackwalker class is an abstract base class providing common generic
+// methods that apply to stacks from all systems.  Specific implementations
+// will extend this class by providing GetContextFrame and GetCallerFrame
+// methods to fill in system-specific data in a StackFrame structure.
+// Stackwalker assembles these StackFrame strucutres into a CallStack.
+//
+// Author: Mark Mentovai
+
+
+#ifndef GOOGLE_BREAKPAD_PROCESSOR_STACKWALKER_H__
+#define GOOGLE_BREAKPAD_PROCESSOR_STACKWALKER_H__
+
+#include <vector>
+
+namespace google_breakpad {
+
+class CallStack;
+class CodeModules;
+template<typename T> class linked_ptr;
+class MemoryRegion;
+class MinidumpContext;
+class SourceLineResolverInterface;
+struct StackFrame;
+struct StackFrameInfo;
+class SymbolSupplier;
+class SystemInfo;
+
+using std::vector;
+
+
+class Stackwalker {
+ public:
+  virtual ~Stackwalker() {}
+
+  // Populates the given CallStack by calling GetContextFrame and
+  // GetCallerFrame.  The frames are further processed to fill all available
+  // data.  Returns true if the stackwalk completed, or false if it was
+  // interrupted by SymbolSupplier::GetSymbolFile().
+  bool Walk(CallStack *stack);
+
+  // Returns a new concrete subclass suitable for the CPU that a stack was
+  // generated on, according to the CPU type indicated by the context
+  // argument.  If no suitable concrete subclass exists, returns NULL.
+  static Stackwalker* StackwalkerForCPU(const SystemInfo *system_info,
+                                        MinidumpContext *context,
+                                        MemoryRegion *memory,
+                                        const CodeModules *modules,
+                                        SymbolSupplier *supplier,
+                                        SourceLineResolverInterface *resolver);
+
+ protected:
+  // system_info identifies the operating system, NULL or empty if unknown.
+  // memory identifies a MemoryRegion that provides the stack memory
+  // for the stack to walk.  modules, if non-NULL, is a CodeModules
+  // object that is used to look up which code module each stack frame is
+  // associated with.  supplier is an optional caller-supplied SymbolSupplier
+  // implementation.  If supplier is NULL, source line info will not be
+  // resolved.  resolver is an instance of SourceLineResolverInterface
+  // (see source_line_resolver_interface.h and basic_source_line_resolver.h).
+  // If resolver is NULL, source line info will not be resolved.
+  Stackwalker(const SystemInfo *system_info,
+              MemoryRegion *memory,
+              const CodeModules *modules,
+              SymbolSupplier *supplier,
+              SourceLineResolverInterface *resolver);
+
+  // Information about the system that produced the minidump.  Subclasses
+  // and the SymbolSupplier may find this information useful.
+  const SystemInfo *system_info_;
+
+  // The stack memory to walk.  Subclasses will require this region to
+  // get information from the stack.
+  MemoryRegion *memory_;
+
+ private:
+  // Obtains the context frame, the innermost called procedure in a stack
+  // trace.  Returns NULL on failure.  GetContextFrame allocates a new
+  // StackFrame (or StackFrame subclass), ownership of which is taken by
+  // the caller.
+  virtual StackFrame* GetContextFrame() = 0;
+
+  // Obtains a caller frame.  Each call to GetCallerFrame should return the
+  // frame that called the last frame returned by GetContextFrame or
+  // GetCallerFrame.  To aid this purpose, stack contains the CallStack
+  // made of frames that have already been walked.  GetCallerFrame should
+  // return NULL on failure or when there are no more caller frames (when
+  // the end of the stack has been reached).  GetCallerFrame allocates a new
+  // StackFrame (or StackFrame subclass), ownership of which is taken by
+  // the caller.
+  virtual StackFrame* GetCallerFrame(
+      const CallStack *stack,
+      const vector< linked_ptr<StackFrameInfo> > &stack_frame_info) = 0;
+
+  // A list of modules, for populating each StackFrame's module information.
+  // This field is optional and may be NULL.
+  const CodeModules *modules_;
+
+  // The optional SymbolSupplier for resolving source line info.
+  SymbolSupplier *supplier_;
+
+  // The SourceLineResolver implementation
+  SourceLineResolverInterface *resolver_;
+};
+
+
+}  // namespace google_breakpad
+
+
+#endif  // GOOGLE_BREAKPAD_PROCESSOR_STACKWALKER_H__