grokdump: Simple windows minidump analysis on linux.
Analyses full minidump (.dmp) files. Shows the processor state at the point of exception including the stack of the active thread and the referenced objects in the V8 heap. Code objects are disassembled and the addresses linked from the stack (pushed return addresses) are marked with "=>". Review URL: http://codereview.chromium.org/6312058 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6896 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
vitalyr@chromium.org
parent
2e7a41f944
commit
25f2f21f50
92
tools/disasm.py
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92
tools/disasm.py
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#!/usr/bin/env python
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#
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# Copyright 2011 the V8 project authors. All rights reserved.
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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
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# disclaimer in the documentation and/or other materials provided
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# with the 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
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# from 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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import os
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import re
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import subprocess
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import tempfile
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# Avoid using the slow (google-specific) wrapper around objdump.
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OBJDUMP_BIN = "/usr/bin/objdump"
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if not os.path.exists(OBJDUMP_BIN):
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OBJDUMP_BIN = "objdump"
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_COMMON_DISASM_OPTIONS = ["-M", "intel-mnemonic", "-C"]
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_DISASM_HEADER_RE = re.compile(r"[a-f0-9]+\s+<.*:$")
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_DISASM_LINE_RE = re.compile(r"\s*([a-f0-9]+):\s*(\S.*)")
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# Keys must match constants in Logger::LogCodeInfo.
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_ARCH_MAP = {
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"ia32": "-m i386",
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"x64": "-m i386 -M x86-64",
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"arm": "-m arm" # Not supported by our objdump build.
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}
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def GetDisasmLines(filename, offset, size, arch, inplace):
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tmp_name = None
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if not inplace:
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# Create a temporary file containing a copy of the code.
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assert arch in _ARCH_MAP, "Unsupported architecture '%s'" % arch
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arch_flags = _ARCH_MAP[arch]
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tmp_name = tempfile.mktemp(".v8code")
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command = "dd if=%s of=%s bs=1 count=%d skip=%d && " \
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"%s %s -D -b binary %s %s" % (
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filename, tmp_name, size, offset,
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OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), arch_flags,
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tmp_name)
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else:
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command = "%s %s --start-address=%d --stop-address=%d -d %s " % (
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OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS),
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offset,
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offset + size,
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filename)
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process = subprocess.Popen(command,
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shell=True,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT)
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out, err = process.communicate()
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lines = out.split("\n")
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header_line = 0
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for i, line in enumerate(lines):
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if _DISASM_HEADER_RE.match(line):
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header_line = i
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break
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if tmp_name:
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os.unlink(tmp_name)
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split_lines = []
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for line in lines[header_line + 1:]:
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match = _DISASM_LINE_RE.match(line)
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if match:
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line_address = int(match.group(1), 16)
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split_lines.append((line_address, match.group(2)))
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return split_lines
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840
tools/grokdump.py
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840
tools/grokdump.py
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#!/usr/bin/env python
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#
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# Copyright 2011 the V8 project authors. All rights reserved.
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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
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# disclaimer in the documentation and/or other materials provided
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# with the 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
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# from 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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import ctypes
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import mmap
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import optparse
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import os
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import disasm
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import sys
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import types
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import codecs
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import re
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USAGE="""usage: %prog [OPTION]...
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Minidump analyzer.
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Shows the processor state at the point of exception including the
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stack of the active thread and the referenced objects in the V8
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heap. Code objects are disassembled and the addresses linked from the
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stack (pushed return addresses) are marked with "=>".
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Examples:
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$ %prog 12345678-1234-1234-1234-123456789abcd-full.dmp
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"""
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DEBUG=False
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def DebugPrint(s):
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if not DEBUG: return
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print s
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class Descriptor(object):
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"""Descriptor of a structure in a memory."""
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def __init__(self, fields):
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self.fields = fields
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self.is_flexible = False
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for _, type_or_func in fields:
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if isinstance(type_or_func, types.FunctionType):
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self.is_flexible = True
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break
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if not self.is_flexible:
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self.ctype = Descriptor._GetCtype(fields)
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self.size = ctypes.sizeof(self.ctype)
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def Read(self, memory, offset):
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if self.is_flexible:
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fields_copy = self.fields[:]
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last = 0
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for name, type_or_func in fields_copy:
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if isinstance(type_or_func, types.FunctionType):
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partial_ctype = Descriptor._GetCtype(fields_copy[:last])
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partial_object = partial_ctype.from_buffer(memory, offset)
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type = type_or_func(partial_object)
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if type is not None:
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fields_copy[last] = (name, type)
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last += 1
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else:
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last += 1
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complete_ctype = Descriptor._GetCtype(fields_copy[:last])
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else:
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complete_ctype = self.ctype
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return complete_ctype.from_buffer(memory, offset)
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@staticmethod
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def _GetCtype(fields):
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class Raw(ctypes.Structure):
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_fields_ = fields
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_pack_ = 1
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def __str__(self):
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return "{" + ", ".join("%s: %s" % (field, self.__getattribute__(field))
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for field, _ in Raw._fields_) + "}"
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return Raw
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# Set of structures and constants that describe the layout of minidump
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# files. Based on MSDN and Google Breakpad.
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MINIDUMP_HEADER = Descriptor([
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("signature", ctypes.c_uint32),
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("version", ctypes.c_uint32),
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("stream_count", ctypes.c_uint32),
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("stream_directories_rva", ctypes.c_uint32),
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("checksum", ctypes.c_uint32),
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("time_date_stampt", ctypes.c_uint32),
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("flags", ctypes.c_uint64)
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])
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MINIDUMP_LOCATION_DESCRIPTOR = Descriptor([
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("data_size", ctypes.c_uint32),
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("rva", ctypes.c_uint32)
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])
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MINIDUMP_DIRECTORY = Descriptor([
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("stream_type", ctypes.c_uint32),
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("location", MINIDUMP_LOCATION_DESCRIPTOR.ctype)
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])
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MD_EXCEPTION_MAXIMUM_PARAMETERS = 15
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MINIDUMP_EXCEPTION = Descriptor([
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("code", ctypes.c_uint32),
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("flags", ctypes.c_uint32),
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("record", ctypes.c_uint64),
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("address", ctypes.c_uint64),
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("parameter_count", ctypes.c_uint32),
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("unused_alignment", ctypes.c_uint32),
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("information", ctypes.c_uint64 * MD_EXCEPTION_MAXIMUM_PARAMETERS)
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])
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MINIDUMP_EXCEPTION_STREAM = Descriptor([
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("thread_id", ctypes.c_uint32),
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("unused_alignment", ctypes.c_uint32),
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("exception", MINIDUMP_EXCEPTION.ctype),
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("thread_context", MINIDUMP_LOCATION_DESCRIPTOR.ctype)
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])
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# Stream types.
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MD_UNUSED_STREAM = 0
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MD_RESERVED_STREAM_0 = 1
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MD_RESERVED_STREAM_1 = 2
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MD_THREAD_LIST_STREAM = 3
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MD_MODULE_LIST_STREAM = 4
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MD_MEMORY_LIST_STREAM = 5
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MD_EXCEPTION_STREAM = 6
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MD_SYSTEM_INFO_STREAM = 7
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MD_THREAD_EX_LIST_STREAM = 8
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MD_MEMORY_64_LIST_STREAM = 9
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MD_COMMENT_STREAM_A = 10
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MD_COMMENT_STREAM_W = 11
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MD_HANDLE_DATA_STREAM = 12
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MD_FUNCTION_TABLE_STREAM = 13
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MD_UNLOADED_MODULE_LIST_STREAM = 14
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MD_MISC_INFO_STREAM = 15
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MD_MEMORY_INFO_LIST_STREAM = 16
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MD_THREAD_INFO_LIST_STREAM = 17
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MD_HANDLE_OPERATION_LIST_STREAM = 18
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MD_FLOATINGSAVEAREA_X86_REGISTERAREA_SIZE = 80
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MINIDUMP_FLOATING_SAVE_AREA_X86 = Descriptor([
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("control_word", ctypes.c_uint32),
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("status_word", ctypes.c_uint32),
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("tag_word", ctypes.c_uint32),
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("error_offset", ctypes.c_uint32),
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("error_selector", ctypes.c_uint32),
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("data_offset", ctypes.c_uint32),
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("data_selector", ctypes.c_uint32),
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("register_area", ctypes.c_uint8 * MD_FLOATINGSAVEAREA_X86_REGISTERAREA_SIZE),
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("cr0_npx_state", ctypes.c_uint32)
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])
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MD_CONTEXT_X86_EXTENDED_REGISTERS_SIZE = 512
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# Context flags.
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MD_CONTEXT_X86 = 0x00010000
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MD_CONTEXT_X86_CONTROL = (MD_CONTEXT_X86 | 0x00000001)
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MD_CONTEXT_X86_INTEGER = (MD_CONTEXT_X86 | 0x00000002)
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MD_CONTEXT_X86_SEGMENTS = (MD_CONTEXT_X86 | 0x00000004)
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MD_CONTEXT_X86_FLOATING_POINT = (MD_CONTEXT_X86 | 0x00000008)
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MD_CONTEXT_X86_DEBUG_REGISTERS = (MD_CONTEXT_X86 | 0x00000010)
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MD_CONTEXT_X86_EXTENDED_REGISTERS = (MD_CONTEXT_X86 | 0x00000020)
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def EnableOnFlag(type, flag):
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return lambda o: [None, type][int((o.context_flags & flag) != 0)]
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MINIDUMP_CONTEXT_X86 = Descriptor([
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("context_flags", ctypes.c_uint32),
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# MD_CONTEXT_X86_DEBUG_REGISTERS.
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("dr0", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
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("dr1", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
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("dr2", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
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("dr3", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
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("dr6", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
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("dr7", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
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# MD_CONTEXT_X86_FLOATING_POINT.
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("float_save", EnableOnFlag(MINIDUMP_FLOATING_SAVE_AREA_X86.ctype,
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MD_CONTEXT_X86_FLOATING_POINT)),
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# MD_CONTEXT_X86_SEGMENTS.
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("gs", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_SEGMENTS)),
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("fs", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_SEGMENTS)),
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("es", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_SEGMENTS)),
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("ds", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_SEGMENTS)),
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# MD_CONTEXT_X86_INTEGER.
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("edi", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
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("esi", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
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("ebx", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
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("edx", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
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("ecx", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
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("eax", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
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# MD_CONTEXT_X86_CONTROL.
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("ebp", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
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("eip", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
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("cs", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
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("eflags", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
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("esp", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
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("ss", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
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# MD_CONTEXT_X86_EXTENDED_REGISTERS.
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("extended_registers",
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EnableOnFlag(ctypes.c_uint8 * MD_CONTEXT_X86_EXTENDED_REGISTERS_SIZE,
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MD_CONTEXT_X86_EXTENDED_REGISTERS))
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])
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MINIDUMP_MEMORY_DESCRIPTOR = Descriptor([
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("start", ctypes.c_uint64),
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("memory", MINIDUMP_LOCATION_DESCRIPTOR.ctype)
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])
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MINIDUMP_MEMORY_DESCRIPTOR64 = Descriptor([
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("start", ctypes.c_uint64),
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("size", ctypes.c_uint64)
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])
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MINIDUMP_MEMORY_LIST = Descriptor([
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("range_count", ctypes.c_uint32),
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("ranges", lambda m: MINIDUMP_MEMORY_DESCRIPTOR.ctype * m.range_count)
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])
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MINIDUMP_MEMORY_LIST64 = Descriptor([
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("range_count", ctypes.c_uint64),
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("base_rva", ctypes.c_uint64),
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("ranges", lambda m: MINIDUMP_MEMORY_DESCRIPTOR64.ctype * m.range_count)
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])
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MINIDUMP_THREAD = Descriptor([
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("id", ctypes.c_uint32),
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("suspend_count", ctypes.c_uint32),
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("priority_class", ctypes.c_uint32),
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("priority", ctypes.c_uint32),
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("ted", ctypes.c_uint64),
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("stack", MINIDUMP_MEMORY_DESCRIPTOR.ctype),
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("context", MINIDUMP_LOCATION_DESCRIPTOR.ctype)
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])
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MINIDUMP_THREAD_LIST = Descriptor([
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("thread_count", ctypes.c_uint32),
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("threads", lambda t: MINIDUMP_THREAD.ctype * t.thread_count)
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])
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class MinidumpReader(object):
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"""Minidump (.dmp) reader."""
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_HEADER_MAGIC = 0x504d444d
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def __init__(self, options, minidump_name):
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self.minidump_name = minidump_name
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self.minidump_file = open(minidump_name, "r")
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self.minidump = mmap.mmap(self.minidump_file.fileno(), 0, mmap.MAP_PRIVATE)
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self.header = MINIDUMP_HEADER.Read(self.minidump, 0)
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if self.header.signature != MinidumpReader._HEADER_MAGIC:
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print >>sys.stderr, "Warning: unsupported minidump header magic"
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DebugPrint(self.header)
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directories = []
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offset = self.header.stream_directories_rva
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for _ in xrange(self.header.stream_count):
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directories.append(MINIDUMP_DIRECTORY.Read(self.minidump, offset))
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offset += MINIDUMP_DIRECTORY.size
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self.exception = None
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self.exception_context = None
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self.memory_list = None
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self.thread_map = {}
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for d in directories:
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DebugPrint(d)
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# TODO(vitalyr): extract system info including CPU features.
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if d.stream_type == MD_EXCEPTION_STREAM:
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self.exception = MINIDUMP_EXCEPTION_STREAM.Read(
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self.minidump, d.location.rva)
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DebugPrint(self.exception)
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self.exception_context = MINIDUMP_CONTEXT_X86.Read(
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self.minidump, self.exception.thread_context.rva)
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DebugPrint(self.exception_context)
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elif d.stream_type == MD_THREAD_LIST_STREAM:
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thread_list = MINIDUMP_THREAD_LIST.Read(self.minidump, d.location.rva)
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assert ctypes.sizeof(thread_list) == d.location.data_size
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DebugPrint(thread_list)
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for thread in thread_list.threads:
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DebugPrint(thread)
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self.thread_map[thread.id] = thread
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elif d.stream_type == MD_MEMORY_LIST_STREAM:
|
||||
print >>sys.stderr, "Warning: not a full minidump"
|
||||
ml = MINIDUMP_MEMORY_LIST.Read(self.minidump, d.location.rva)
|
||||
DebugPrint(ml)
|
||||
for m in ml.ranges:
|
||||
DebugPrint(m)
|
||||
elif d.stream_type == MD_MEMORY_64_LIST_STREAM:
|
||||
assert self.memory_list is None
|
||||
self.memory_list = MINIDUMP_MEMORY_LIST64.Read(
|
||||
self.minidump, d.location.rva)
|
||||
assert ctypes.sizeof(self.memory_list) == d.location.data_size
|
||||
DebugPrint(self.memory_list)
|
||||
|
||||
def IsValidAddress(self, address):
|
||||
return self.FindLocation(address) is not None
|
||||
|
||||
def ReadU8(self, address):
|
||||
location = self.FindLocation(address)
|
||||
return ctypes.c_uint8.from_buffer(self.minidump, location).value
|
||||
|
||||
def ReadU32(self, address):
|
||||
location = self.FindLocation(address)
|
||||
return ctypes.c_uint32.from_buffer(self.minidump, location).value
|
||||
|
||||
def ReadBytes(self, address, size):
|
||||
location = self.FindLocation(address)
|
||||
return self.minidump[location:location + size]
|
||||
|
||||
def FindLocation(self, address):
|
||||
# TODO(vitalyr): only works for full minidumps (...64 structure variants).
|
||||
offset = 0
|
||||
for r in self.memory_list.ranges:
|
||||
if r.start <= address < r.start + r.size:
|
||||
return self.memory_list.base_rva + offset + address - r.start
|
||||
offset += r.size
|
||||
return None
|
||||
|
||||
def GetDisasmLines(self, address, size):
|
||||
location = self.FindLocation(address)
|
||||
if location is None: return []
|
||||
return disasm.GetDisasmLines(self.minidump_name,
|
||||
location,
|
||||
size,
|
||||
"ia32",
|
||||
False)
|
||||
|
||||
|
||||
def Dispose(self):
|
||||
self.minidump.close()
|
||||
self.minidump_file.close()
|
||||
|
||||
|
||||
# List of V8 instance types. Obtained by adding the code below to any .cc file.
|
||||
#
|
||||
# #define DUMP_TYPE(T) printf("%d: \"%s\",\n", T, #T);
|
||||
# struct P {
|
||||
# P() {
|
||||
# printf("{\n");
|
||||
# INSTANCE_TYPE_LIST(DUMP_TYPE)
|
||||
# printf("}\n");
|
||||
# }
|
||||
# };
|
||||
# static P p;
|
||||
INSTANCE_TYPES = {
|
||||
64: "SYMBOL_TYPE",
|
||||
68: "ASCII_SYMBOL_TYPE",
|
||||
65: "CONS_SYMBOL_TYPE",
|
||||
69: "CONS_ASCII_SYMBOL_TYPE",
|
||||
66: "EXTERNAL_SYMBOL_TYPE",
|
||||
74: "EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE",
|
||||
70: "EXTERNAL_ASCII_SYMBOL_TYPE",
|
||||
0: "STRING_TYPE",
|
||||
4: "ASCII_STRING_TYPE",
|
||||
1: "CONS_STRING_TYPE",
|
||||
5: "CONS_ASCII_STRING_TYPE",
|
||||
2: "EXTERNAL_STRING_TYPE",
|
||||
10: "EXTERNAL_STRING_WITH_ASCII_DATA_TYPE",
|
||||
6: "EXTERNAL_ASCII_STRING_TYPE",
|
||||
6: "PRIVATE_EXTERNAL_ASCII_STRING_TYPE",
|
||||
128: "MAP_TYPE",
|
||||
129: "CODE_TYPE",
|
||||
130: "ODDBALL_TYPE",
|
||||
131: "JS_GLOBAL_PROPERTY_CELL_TYPE",
|
||||
132: "HEAP_NUMBER_TYPE",
|
||||
133: "PROXY_TYPE",
|
||||
134: "BYTE_ARRAY_TYPE",
|
||||
135: "PIXEL_ARRAY_TYPE",
|
||||
136: "EXTERNAL_BYTE_ARRAY_TYPE",
|
||||
137: "EXTERNAL_UNSIGNED_BYTE_ARRAY_TYPE",
|
||||
138: "EXTERNAL_SHORT_ARRAY_TYPE",
|
||||
139: "EXTERNAL_UNSIGNED_SHORT_ARRAY_TYPE",
|
||||
140: "EXTERNAL_INT_ARRAY_TYPE",
|
||||
141: "EXTERNAL_UNSIGNED_INT_ARRAY_TYPE",
|
||||
142: "EXTERNAL_FLOAT_ARRAY_TYPE",
|
||||
143: "FILLER_TYPE",
|
||||
144: "ACCESSOR_INFO_TYPE",
|
||||
145: "ACCESS_CHECK_INFO_TYPE",
|
||||
146: "INTERCEPTOR_INFO_TYPE",
|
||||
147: "CALL_HANDLER_INFO_TYPE",
|
||||
148: "FUNCTION_TEMPLATE_INFO_TYPE",
|
||||
149: "OBJECT_TEMPLATE_INFO_TYPE",
|
||||
150: "SIGNATURE_INFO_TYPE",
|
||||
151: "TYPE_SWITCH_INFO_TYPE",
|
||||
152: "SCRIPT_TYPE",
|
||||
153: "CODE_CACHE_TYPE",
|
||||
156: "FIXED_ARRAY_TYPE",
|
||||
157: "SHARED_FUNCTION_INFO_TYPE",
|
||||
158: "JS_MESSAGE_OBJECT_TYPE",
|
||||
159: "JS_VALUE_TYPE",
|
||||
160: "JS_OBJECT_TYPE",
|
||||
161: "JS_CONTEXT_EXTENSION_OBJECT_TYPE",
|
||||
162: "JS_GLOBAL_OBJECT_TYPE",
|
||||
163: "JS_BUILTINS_OBJECT_TYPE",
|
||||
164: "JS_GLOBAL_PROXY_TYPE",
|
||||
165: "JS_ARRAY_TYPE",
|
||||
166: "JS_REGEXP_TYPE",
|
||||
167: "JS_FUNCTION_TYPE",
|
||||
154: "DEBUG_INFO_TYPE",
|
||||
155: "BREAK_POINT_INFO_TYPE",
|
||||
}
|
||||
|
||||
|
||||
class Printer(object):
|
||||
"""Printer with indentation support."""
|
||||
|
||||
def __init__(self):
|
||||
self.indent = 0
|
||||
|
||||
def Indent(self):
|
||||
self.indent += 2
|
||||
|
||||
def Dedent(self):
|
||||
self.indent -= 2
|
||||
|
||||
def Print(self, string):
|
||||
print "%s%s" % (self._IndentString(), string)
|
||||
|
||||
def PrintLines(self, lines):
|
||||
indent = self._IndentString()
|
||||
print "\n".join("%s%s" % (indent, line) for line in lines)
|
||||
|
||||
def _IndentString(self):
|
||||
return self.indent * " "
|
||||
|
||||
|
||||
ADDRESS_RE = re.compile(r"0x[0-9a-fA-F]+")
|
||||
|
||||
|
||||
def FormatDisasmLine(start, heap, line):
|
||||
line_address = start + line[0]
|
||||
stack_slot = heap.stack_map.get(line_address)
|
||||
marker = " "
|
||||
if stack_slot:
|
||||
marker = "=>"
|
||||
code = AnnotateAddresses(heap, line[1])
|
||||
return "%s%08x %08x: %s" % (marker, line_address, line[0], code)
|
||||
|
||||
|
||||
def AnnotateAddresses(heap, line):
|
||||
extra = []
|
||||
for m in ADDRESS_RE.finditer(line):
|
||||
maybe_address = int(m.group(0), 16)
|
||||
object = heap.FindObject(maybe_address)
|
||||
if not object: continue
|
||||
extra.append(str(object))
|
||||
if len(extra) == 0: return line
|
||||
return "%s ;; %s" % (line, ", ".join(extra))
|
||||
|
||||
|
||||
class HeapObject(object):
|
||||
def __init__(self, heap, map, address):
|
||||
self.heap = heap
|
||||
self.map = map
|
||||
self.address = address
|
||||
|
||||
def Is(self, cls):
|
||||
return isinstance(self, cls)
|
||||
|
||||
def Print(self, p):
|
||||
p.Print(str(self))
|
||||
|
||||
def __str__(self):
|
||||
return "HeapObject(%08x, %s)" % (self.address,
|
||||
INSTANCE_TYPES[self.map.instance_type])
|
||||
|
||||
def ObjectField(self, offset):
|
||||
field_value = self.heap.reader.ReadU32(self.address + offset)
|
||||
return self.heap.FindObjectOrSmi(field_value)
|
||||
|
||||
def SmiField(self, offset):
|
||||
field_value = self.heap.reader.ReadU32(self.address + offset)
|
||||
assert (field_value & 1) == 0
|
||||
return field_value / 2
|
||||
|
||||
|
||||
class Map(HeapObject):
|
||||
INSTANCE_TYPE_OFFSET = 8
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
HeapObject.__init__(self, heap, map, address)
|
||||
self.instance_type = \
|
||||
heap.reader.ReadU8(self.address + Map.INSTANCE_TYPE_OFFSET)
|
||||
|
||||
|
||||
class String(HeapObject):
|
||||
LENGTH_OFFSET = 4
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
HeapObject.__init__(self, heap, map, address)
|
||||
self.length = self.SmiField(String.LENGTH_OFFSET)
|
||||
|
||||
def GetChars(self):
|
||||
return "?string?"
|
||||
|
||||
def Print(self, p):
|
||||
p.Print(str(self))
|
||||
|
||||
def __str__(self):
|
||||
return "\"%s\"" % self.GetChars()
|
||||
|
||||
|
||||
class SeqString(String):
|
||||
CHARS_OFFSET = 12
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
String.__init__(self, heap, map, address)
|
||||
self.chars = heap.reader.ReadBytes(self.address + SeqString.CHARS_OFFSET,
|
||||
self.length)
|
||||
|
||||
def GetChars(self):
|
||||
return self.chars
|
||||
|
||||
|
||||
class ExternalString(String):
|
||||
RESOURCE_OFFSET = 12
|
||||
|
||||
WEBKIT_RESOUCE_STRING_IMPL_OFFSET = 4
|
||||
WEBKIT_STRING_IMPL_CHARS_OFFSET = 8
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
String.__init__(self, heap, map, address)
|
||||
reader = heap.reader
|
||||
self.resource = \
|
||||
reader.ReadU32(self.address + ExternalString.RESOURCE_OFFSET)
|
||||
self.chars = "?external string?"
|
||||
if not reader.IsValidAddress(self.resource): return
|
||||
string_impl_address = self.resource + \
|
||||
ExternalString.WEBKIT_RESOUCE_STRING_IMPL_OFFSET
|
||||
if not reader.IsValidAddress(string_impl_address): return
|
||||
string_impl = reader.ReadU32(string_impl_address)
|
||||
chars_ptr_address = string_impl + \
|
||||
ExternalString.WEBKIT_STRING_IMPL_CHARS_OFFSET
|
||||
if not reader.IsValidAddress(chars_ptr_address): return
|
||||
chars_ptr = reader.ReadU32(chars_ptr_address)
|
||||
if not reader.IsValidAddress(chars_ptr): return
|
||||
raw_chars = reader.ReadBytes(chars_ptr, 2 * self.length)
|
||||
self.chars = codecs.getdecoder("utf16")(raw_chars)[0]
|
||||
|
||||
def GetChars(self):
|
||||
return self.chars
|
||||
|
||||
|
||||
class ConsString(String):
|
||||
LEFT_OFFSET = 12
|
||||
RIGHT_OFFSET = 16
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
String.__init__(self, heap, map, address)
|
||||
self.left = self.ObjectField(ConsString.LEFT_OFFSET)
|
||||
self.right = self.ObjectField(ConsString.RIGHT_OFFSET)
|
||||
|
||||
def GetChars(self):
|
||||
return self.left.GetChars() + self.right.GetChars()
|
||||
|
||||
|
||||
class Oddball(HeapObject):
|
||||
TO_STRING_OFFSET = 4
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
HeapObject.__init__(self, heap, map, address)
|
||||
self.to_string = self.ObjectField(Oddball.TO_STRING_OFFSET)
|
||||
|
||||
def Print(self, p):
|
||||
p.Print(str(self))
|
||||
|
||||
def __str__(self):
|
||||
return "<%s>" % self.to_string.GetChars()
|
||||
|
||||
|
||||
class FixedArray(HeapObject):
|
||||
LENGTH_OFFSET = 4
|
||||
ELEMENTS_OFFSET = 8
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
HeapObject.__init__(self, heap, map, address)
|
||||
self.length = self.SmiField(FixedArray.LENGTH_OFFSET)
|
||||
|
||||
def Print(self, p):
|
||||
p.Print("FixedArray(%08x) {" % self.address)
|
||||
p.Indent()
|
||||
p.Print("length: %d" % self.length)
|
||||
for i in xrange(self.length):
|
||||
offset = FixedArray.ELEMENTS_OFFSET + 4 * i
|
||||
p.Print("[%08d] = %s" % (i, self.ObjectField(offset)))
|
||||
p.Dedent()
|
||||
p.Print("}")
|
||||
|
||||
def __str__(self):
|
||||
return "FixedArray(%08x, length=%d)" % (self.address, self.length)
|
||||
|
||||
|
||||
class JSFunction(HeapObject):
|
||||
CODE_ENTRY_OFFSET = 12
|
||||
SHARED_OFFSET = 20
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
HeapObject.__init__(self, heap, map, address)
|
||||
code_entry = \
|
||||
heap.reader.ReadU32(self.address + JSFunction.CODE_ENTRY_OFFSET)
|
||||
self.code = heap.FindObject(code_entry - Code.ENTRY_OFFSET + 1)
|
||||
self.shared = self.ObjectField(JSFunction.SHARED_OFFSET)
|
||||
|
||||
def Print(self, p):
|
||||
source = "\n".join(" %s" % line for line in self._GetSource().split("\n"))
|
||||
p.Print("JSFunction(%08x) {" % self.address)
|
||||
p.Indent()
|
||||
p.Print("inferred name: %s" % self.shared.inferred_name)
|
||||
if self.shared.script.Is(Script) and self.shared.script.name.Is(String):
|
||||
p.Print("script name: %s" % self.shared.script.name)
|
||||
p.Print("source:")
|
||||
p.PrintLines(self._GetSource().split("\n"))
|
||||
p.Print("code:")
|
||||
self.code.Print(p)
|
||||
if self.code != self.shared.code:
|
||||
p.Print("unoptimized code:")
|
||||
self.shared.code.Print(p)
|
||||
p.Dedent()
|
||||
p.Print("}")
|
||||
|
||||
def __str__(self):
|
||||
inferred_name = ""
|
||||
if self.shared.Is(SharedFunctionInfo):
|
||||
inferred_name = self.shared.inferred_name
|
||||
return "JSFunction(%08x, %s)" % (self.address, inferred_name)
|
||||
|
||||
def _GetSource(self):
|
||||
source = "?source?"
|
||||
start = self.shared.start_position
|
||||
end = self.shared.end_position
|
||||
if not self.shared.script.Is(Script): return source
|
||||
script_source = self.shared.script.source
|
||||
if not script_source.Is(String): return source
|
||||
return script_source.GetChars()[start:end]
|
||||
|
||||
|
||||
class SharedFunctionInfo(HeapObject):
|
||||
CODE_OFFSET = 2 * 4
|
||||
SCRIPT_OFFSET = 7 * 4
|
||||
INFERRED_NAME_OFFSET = 9 * 4
|
||||
START_POSITION_AND_TYPE_OFFSET = 17 * 4
|
||||
END_POSITION_OFFSET = 18 * 4
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
HeapObject.__init__(self, heap, map, address)
|
||||
self.code = self.ObjectField(SharedFunctionInfo.CODE_OFFSET)
|
||||
self.script = self.ObjectField(SharedFunctionInfo.SCRIPT_OFFSET)
|
||||
self.inferred_name = \
|
||||
self.ObjectField(SharedFunctionInfo.INFERRED_NAME_OFFSET)
|
||||
start_position_and_type = \
|
||||
self.SmiField(SharedFunctionInfo.START_POSITION_AND_TYPE_OFFSET)
|
||||
self.start_position = start_position_and_type >> 2
|
||||
self.end_position = self.SmiField(SharedFunctionInfo.END_POSITION_OFFSET)
|
||||
|
||||
|
||||
class Script(HeapObject):
|
||||
SOURCE_OFFSET = 4
|
||||
NAME_OFFSET = 8
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
HeapObject.__init__(self, heap, map, address)
|
||||
self.source = self.ObjectField(Script.SOURCE_OFFSET)
|
||||
self.name = self.ObjectField(Script.NAME_OFFSET)
|
||||
|
||||
|
||||
class Code(HeapObject):
|
||||
INSTRUCTION_SIZE_OFFSET = 4
|
||||
ENTRY_OFFSET = 32
|
||||
|
||||
def __init__(self, heap, map, address):
|
||||
HeapObject.__init__(self, heap, map, address)
|
||||
self.entry = self.address + Code.ENTRY_OFFSET
|
||||
self.instruction_size = \
|
||||
heap.reader.ReadU32(self.address + Code.INSTRUCTION_SIZE_OFFSET)
|
||||
|
||||
def Print(self, p):
|
||||
lines = self.heap.reader.GetDisasmLines(self.entry, self.instruction_size)
|
||||
p.Print("Code(%08x) {" % self.address)
|
||||
p.Indent()
|
||||
p.Print("instruction_size: %d" % self.instruction_size)
|
||||
p.PrintLines(self._FormatLine(line) for line in lines)
|
||||
p.Dedent()
|
||||
p.Print("}")
|
||||
|
||||
def _FormatLine(self, line):
|
||||
return FormatDisasmLine(self.entry, self.heap, line)
|
||||
|
||||
|
||||
class V8Heap(object):
|
||||
CLASS_MAP = {
|
||||
"SYMBOL_TYPE": SeqString,
|
||||
"ASCII_SYMBOL_TYPE": SeqString,
|
||||
"CONS_SYMBOL_TYPE": ConsString,
|
||||
"CONS_ASCII_SYMBOL_TYPE": ConsString,
|
||||
"EXTERNAL_SYMBOL_TYPE": ExternalString,
|
||||
"EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE": ExternalString,
|
||||
"EXTERNAL_ASCII_SYMBOL_TYPE": ExternalString,
|
||||
"STRING_TYPE": SeqString,
|
||||
"ASCII_STRING_TYPE": SeqString,
|
||||
"CONS_STRING_TYPE": ConsString,
|
||||
"CONS_ASCII_STRING_TYPE": ConsString,
|
||||
"EXTERNAL_STRING_TYPE": ExternalString,
|
||||
"EXTERNAL_STRING_WITH_ASCII_DATA_TYPE": ExternalString,
|
||||
"EXTERNAL_ASCII_STRING_TYPE": ExternalString,
|
||||
|
||||
"MAP_TYPE": Map,
|
||||
"ODDBALL_TYPE": Oddball,
|
||||
"FIXED_ARRAY_TYPE": FixedArray,
|
||||
"JS_FUNCTION_TYPE": JSFunction,
|
||||
"SHARED_FUNCTION_INFO_TYPE": SharedFunctionInfo,
|
||||
"SCRIPT_TYPE": Script,
|
||||
"CODE_TYPE": Code
|
||||
}
|
||||
|
||||
def __init__(self, reader, stack_map):
|
||||
self.reader = reader
|
||||
self.stack_map = stack_map
|
||||
self.objects = {}
|
||||
|
||||
def FindObjectOrSmi(self, tagged_address):
|
||||
if (tagged_address & 1) == 0: return tagged_address / 2
|
||||
return self.FindObject(tagged_address)
|
||||
|
||||
def FindObject(self, tagged_address):
|
||||
if tagged_address in self.objects:
|
||||
return self.objects[tagged_address]
|
||||
if (tagged_address & 1) != 1: return None
|
||||
address = tagged_address - 1
|
||||
if not self.reader.IsValidAddress(address): return None
|
||||
map_tagged_address = self.reader.ReadU32(address)
|
||||
if tagged_address == map_tagged_address:
|
||||
# Meta map?
|
||||
meta_map = Map(self, None, address)
|
||||
instance_type_name = INSTANCE_TYPES.get(meta_map.instance_type)
|
||||
if instance_type_name != "MAP_TYPE": return None
|
||||
meta_map.map = meta_map
|
||||
object = meta_map
|
||||
else:
|
||||
map = self.FindObject(map_tagged_address)
|
||||
if map is None: return None
|
||||
instance_type_name = INSTANCE_TYPES.get(map.instance_type)
|
||||
if instance_type_name is None: return None
|
||||
cls = V8Heap.CLASS_MAP.get(instance_type_name, HeapObject)
|
||||
object = cls(self, map, address)
|
||||
self.objects[tagged_address] = object
|
||||
return object
|
||||
|
||||
|
||||
EIP_PROXIMITY = 64
|
||||
|
||||
|
||||
def AnalyzeMinidump(options, minidump_name):
|
||||
reader = MinidumpReader(options, minidump_name)
|
||||
DebugPrint("========================================")
|
||||
if reader.exception is None:
|
||||
print "Minidump has no exception info"
|
||||
return
|
||||
print "Exception info:"
|
||||
exception_thread = reader.thread_map[reader.exception.thread_id]
|
||||
print " thread id: %d" % exception_thread.id
|
||||
print " code: %08X" % reader.exception.exception.code
|
||||
print " context:"
|
||||
print " eax: %08x" % reader.exception_context.eax
|
||||
print " ebx: %08x" % reader.exception_context.ebx
|
||||
print " ecx: %08x" % reader.exception_context.ecx
|
||||
print " edx: %08x" % reader.exception_context.edx
|
||||
print " edi: %08x" % reader.exception_context.edi
|
||||
print " esi: %08x" % reader.exception_context.esi
|
||||
print " ebp: %08x" % reader.exception_context.ebp
|
||||
print " esp: %08x" % reader.exception_context.esp
|
||||
print " eip: %08x" % reader.exception_context.eip
|
||||
# TODO(vitalyr): decode eflags.
|
||||
print " eflags: %s" % bin(reader.exception_context.eflags)[2:]
|
||||
print
|
||||
|
||||
stack_bottom = exception_thread.stack.start + \
|
||||
exception_thread.stack.memory.data_size
|
||||
stack_map = {reader.exception_context.eip: -1}
|
||||
for slot in xrange(reader.exception_context.esp, stack_bottom, 4):
|
||||
maybe_address = reader.ReadU32(slot)
|
||||
if not maybe_address in stack_map:
|
||||
stack_map[maybe_address] = slot
|
||||
heap = V8Heap(reader, stack_map)
|
||||
|
||||
print "Disassembly around exception.eip:"
|
||||
start = reader.exception_context.eip - EIP_PROXIMITY
|
||||
lines = reader.GetDisasmLines(start, 2 * EIP_PROXIMITY)
|
||||
for line in lines:
|
||||
print FormatDisasmLine(start, heap, line)
|
||||
print
|
||||
|
||||
print "Annotated stack (from exception.esp to bottom):"
|
||||
for slot in xrange(reader.exception_context.esp, stack_bottom, 4):
|
||||
maybe_address = reader.ReadU32(slot)
|
||||
heap_object = heap.FindObject(maybe_address)
|
||||
print "%08x: %08x" % (slot, maybe_address)
|
||||
if heap_object:
|
||||
heap_object.Print(Printer())
|
||||
print
|
||||
|
||||
reader.Dispose()
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
parser = optparse.OptionParser(USAGE)
|
||||
options, args = parser.parse_args()
|
||||
if len(args) != 1:
|
||||
parser.print_help()
|
||||
sys.exit(1)
|
||||
AnalyzeMinidump(options, args[0])
|
||||
@ -30,13 +30,13 @@
|
||||
import bisect
|
||||
import collections
|
||||
import ctypes
|
||||
import disasm
|
||||
import mmap
|
||||
import optparse
|
||||
import os
|
||||
import re
|
||||
import subprocess
|
||||
import sys
|
||||
import tempfile
|
||||
import time
|
||||
|
||||
|
||||
@ -74,27 +74,12 @@ V8_GC_FAKE_MMAP = "/tmp/__v8_gc__"
|
||||
JS_ORIGIN = "js"
|
||||
JS_SNAPSHOT_ORIGIN = "js-snapshot"
|
||||
|
||||
# Avoid using the slow (google-specific) wrapper around objdump.
|
||||
OBJDUMP_BIN = "/usr/bin/objdump"
|
||||
if not os.path.exists(OBJDUMP_BIN):
|
||||
OBJDUMP_BIN = "objdump"
|
||||
OBJDUMP_BIN = disasm.OBJDUMP_BIN
|
||||
|
||||
|
||||
class Code(object):
|
||||
"""Code object."""
|
||||
|
||||
_COMMON_DISASM_OPTIONS = ["-M", "intel-mnemonic", "-C"]
|
||||
|
||||
_DISASM_HEADER_RE = re.compile(r"[a-f0-9]+\s+<.*:$")
|
||||
_DISASM_LINE_RE = re.compile(r"\s*([a-f0-9]+):.*")
|
||||
|
||||
# Keys must match constants in Logger::LogCodeInfo.
|
||||
_ARCH_MAP = {
|
||||
"ia32": "-m i386",
|
||||
"x64": "-m i386 -M x86-64",
|
||||
"arm": "-m arm" # Not supported by our objdump build.
|
||||
}
|
||||
|
||||
_id = 0
|
||||
|
||||
def __init__(self, name, start_address, end_address, origin, origin_offset):
|
||||
@ -150,12 +135,7 @@ class Code(object):
|
||||
ticks_offsets = [t[0] for t in ticks_map]
|
||||
ticks_counts = [t[1] for t in ticks_map]
|
||||
# Get a list of disassembled lines and their addresses.
|
||||
lines = []
|
||||
for line in self._GetDisasmLines(code_info, options):
|
||||
match = Code._DISASM_LINE_RE.match(line)
|
||||
if match:
|
||||
line_address = int(match.group(1), 16)
|
||||
lines.append((line_address, line))
|
||||
lines = self._GetDisasmLines(code_info, options)
|
||||
if len(lines) == 0:
|
||||
return
|
||||
# Print annotated lines.
|
||||
@ -179,9 +159,9 @@ class Code(object):
|
||||
total_count += count
|
||||
count = 100.0 * count / self.self_ticks
|
||||
if count >= 0.01:
|
||||
print "%15.2f %s" % (count, lines[i][1])
|
||||
print "%15.2f %x: %s" % (count, lines[i][0], lines[i][1])
|
||||
else:
|
||||
print "%s %s" % (" " * 15, lines[i][1])
|
||||
print "%s %x: %s" % (" " * 15, lines[i][0], lines[i][1])
|
||||
print
|
||||
assert total_count == self.self_ticks, \
|
||||
"Lost ticks (%d != %d) in %s" % (total_count, self.self_ticks, self)
|
||||
@ -195,39 +175,17 @@ class Code(object):
|
||||
self.origin)
|
||||
|
||||
def _GetDisasmLines(self, code_info, options):
|
||||
tmp_name = None
|
||||
if self.origin == JS_ORIGIN or self.origin == JS_SNAPSHOT_ORIGIN:
|
||||
assert code_info.arch in Code._ARCH_MAP, \
|
||||
"Unsupported architecture '%s'" % arch
|
||||
arch_flags = Code._ARCH_MAP[code_info.arch]
|
||||
# Create a temporary file just with this code object.
|
||||
tmp_name = tempfile.mktemp(".v8code")
|
||||
size = self.end_address - self.start_address
|
||||
command = "dd if=%s.code of=%s bs=1 count=%d skip=%d && " \
|
||||
"%s %s -D -b binary %s %s" % (
|
||||
options.log, tmp_name, size, self.origin_offset,
|
||||
OBJDUMP_BIN, ' '.join(Code._COMMON_DISASM_OPTIONS), arch_flags,
|
||||
tmp_name)
|
||||
inplace = False
|
||||
filename = options.log + ".code"
|
||||
else:
|
||||
command = "%s %s --start-address=%d --stop-address=%d -d %s " % (
|
||||
OBJDUMP_BIN, ' '.join(Code._COMMON_DISASM_OPTIONS),
|
||||
inplace = True
|
||||
filename = self.origin
|
||||
return disasm.GetDisasmLines(filename,
|
||||
self.origin_offset,
|
||||
self.origin_offset + self.end_address - self.start_address,
|
||||
self.origin)
|
||||
process = subprocess.Popen(command,
|
||||
shell=True,
|
||||
stdout=subprocess.PIPE,
|
||||
stderr=subprocess.STDOUT)
|
||||
out, err = process.communicate()
|
||||
lines = out.split("\n")
|
||||
header_line = 0
|
||||
for i, line in enumerate(lines):
|
||||
if Code._DISASM_HEADER_RE.match(line):
|
||||
header_line = i
|
||||
break
|
||||
if tmp_name:
|
||||
os.unlink(tmp_name)
|
||||
return lines[header_line + 1:]
|
||||
self.end_address - self.start_address,
|
||||
code_info.arch,
|
||||
inplace)
|
||||
|
||||
|
||||
class CodePage(object):
|
||||
|
||||
Loading…
Reference in New Issue
Block a user