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6d3a825dbf
Add a CFIFrameInfo class (named for symmetry with WindowsFrameInfo) to represent the set of STACK CFI rules in effect at a given instruction, and apply them to a set of register values. Provide a SimpleCFIWalker class template, to allow the essential CFI code to be shared amongst the different architectures. Teach BasicSourceLineResolver to partially parse 'STACK CFI' records, and produce the set of rules in effect at a given instruction on demand, by combining the initial rule set and the appropriate rule deltas in a CFIFrameInfo object. Adapt StackwalkerX86 and StackFrameX86 to retrieve, store, and apply CFI stack walking information. Add validity flags for all the general-purpose registers to StackFrameX86::ContextValidity. a=jimblandy, r=mmentovai git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@549 4c0a9323-5329-0410-9bdc-e9ce6186880e
96 lines
4 KiB
C++
96 lines
4 KiB
C++
// -*- mode: C++ -*-
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// Copyright (c) 2010 Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Abstract interface to return function/file/line info for a memory address.
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#ifndef GOOGLE_BREAKPAD_PROCESSOR_SOURCE_LINE_RESOLVER_INTERFACE_H__
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#define GOOGLE_BREAKPAD_PROCESSOR_SOURCE_LINE_RESOLVER_INTERFACE_H__
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#include <string>
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#include "google_breakpad/common/breakpad_types.h"
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namespace google_breakpad {
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using std::string;
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struct StackFrame;
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struct WindowsFrameInfo;
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struct CFIFrameInfo;
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class SourceLineResolverInterface {
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public:
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typedef u_int64_t MemAddr;
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virtual ~SourceLineResolverInterface() {}
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// Adds a module to this resolver, returning true on success.
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//
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// module_name may be an arbitrary string. Typically, it will be the
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// filename of the module, optionally with version identifiers.
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//
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// map_file should contain line/address mappings for this module.
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virtual bool LoadModule(const string &module_name,
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const string &map_file) = 0;
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// Same as above, but takes the contents of a pre-read map buffer
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virtual bool LoadModuleUsingMapBuffer(const string &module_name,
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const string &map_buffer) = 0;
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// Returns true if a module with the given name has been loaded.
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virtual bool HasModule(const string &module_name) const = 0;
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// Fills in the function_base, function_name, source_file_name,
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// and source_line fields of the StackFrame. The instruction and
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// module_name fields must already be filled in.
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virtual void FillSourceLineInfo(StackFrame *frame) const = 0;
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// If Windows stack walking information is available covering
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// FRAME's instruction address, return a WindowsFrameInfo structure
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// describing it. If the information is not available, returns NULL.
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// A NULL return value does not indicate an error. The caller takes
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// ownership of any returned WindowsFrameInfo object.
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virtual WindowsFrameInfo *FindWindowsFrameInfo(const StackFrame *frame)
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const = 0;
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// If CFI stack walking information is available covering ADDRESS,
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// return a CFIFrameInfo structure describing it. If the information
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// is not available, return NULL. The caller takes ownership of any
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// returned CFIFrameInfo object.
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virtual CFIFrameInfo *FindCFIFrameInfo(const StackFrame *frame) const = 0;
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protected:
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// SourceLineResolverInterface cannot be instantiated except by subclasses
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SourceLineResolverInterface() {}
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};
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} // namespace google_breakpad
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#endif // GOOGLE_BREAKPAD_PROCESSOR_SOURCE_LINE_RESOLVER_INTERFACE_H__
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