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grokdump.py
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executable file
·3955 lines (3400 loc) · 134 KB
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#!/usr/bin/env python
#
# Copyright 2012 the V8 project authors. 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.
# flake8: noqa # https://bugs.chromium.org/p/v8/issues/detail?id=8784
# for py2/py3 compatibility
from __future__ import print_function
import BaseHTTPServer
import bisect
import cgi
import cmd
import codecs
import ctypes
import datetime
import disasm
import inspect
import mmap
import optparse
import os
import re
import StringIO
import sys
import types
import urllib
import urlparse
import v8heapconst
import webbrowser
PORT_NUMBER = 8081
USAGE="""usage: %prog [OPTIONS] [DUMP-FILE]
Minidump analyzer.
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 (e.g. pushed return addresses) are marked with "=>".
Examples:
$ %prog 12345678-1234-1234-1234-123456789abcd-full.dmp"""
DEBUG=False
def DebugPrint(s):
if not DEBUG: return
print(s)
class Descriptor(object):
"""Descriptor of a structure in a memory."""
def __init__(self, fields):
self.fields = fields
self.is_flexible = False
for _, type_or_func in fields:
if isinstance(type_or_func, types.FunctionType):
self.is_flexible = True
break
if not self.is_flexible:
self.ctype = Descriptor._GetCtype(fields)
self.size = ctypes.sizeof(self.ctype)
def Read(self, memory, offset):
if self.is_flexible:
fields_copy = self.fields[:]
last = 0
for name, type_or_func in fields_copy:
if isinstance(type_or_func, types.FunctionType):
partial_ctype = Descriptor._GetCtype(fields_copy[:last])
partial_object = partial_ctype.from_buffer(memory, offset)
type = type_or_func(partial_object)
if type is not None:
fields_copy[last] = (name, type)
last += 1
else:
last += 1
complete_ctype = Descriptor._GetCtype(fields_copy[:last])
else:
complete_ctype = self.ctype
return complete_ctype.from_buffer(memory, offset)
@staticmethod
def _GetCtype(fields):
class Raw(ctypes.Structure):
_fields_ = fields
_pack_ = 1
def __str__(self):
return "{" + ", ".join("%s: %s" % (field, self.__getattribute__(field))
for field, _ in Raw._fields_) + "}"
return Raw
def FullDump(reader, heap):
"""Dump all available memory regions."""
def dump_region(reader, start, size, location):
print()
while start & 3 != 0:
start += 1
size -= 1
location += 1
is_executable = reader.IsProbableExecutableRegion(location, size)
is_ascii = reader.IsProbableASCIIRegion(location, size)
if is_executable is not False:
lines = reader.GetDisasmLines(start, size)
for line in lines:
print(FormatDisasmLine(start, heap, line))
print()
if is_ascii is not False:
# Output in the same format as the Unix hd command
addr = start
for i in range(0, size, 16):
slot = i + location
hex_line = ""
asc_line = ""
for i in range(16):
if slot + i < location + size:
byte = ctypes.c_uint8.from_buffer(reader.minidump, slot + i).value
if byte >= 0x20 and byte < 0x7f:
asc_line += chr(byte)
else:
asc_line += "."
hex_line += " %02x" % (byte)
else:
hex_line += " "
if i == 7:
hex_line += " "
print("%s %s |%s|" % (reader.FormatIntPtr(addr),
hex_line,
asc_line))
addr += 16
if is_executable is not True and is_ascii is not True:
print("%s - %s" % (reader.FormatIntPtr(start),
reader.FormatIntPtr(start + size)))
print(start + size + 1);
for i in range(0, size, reader.PointerSize()):
slot = start + i
maybe_address = reader.ReadUIntPtr(slot)
heap_object = heap.FindObject(maybe_address)
print("%s: %s" % (reader.FormatIntPtr(slot),
reader.FormatIntPtr(maybe_address)))
if heap_object:
heap_object.Print(Printer())
print()
reader.ForEachMemoryRegion(dump_region)
# Heap constants generated by 'make grokdump' in v8heapconst module.
INSTANCE_TYPES = v8heapconst.INSTANCE_TYPES
KNOWN_MAPS = v8heapconst.KNOWN_MAPS
KNOWN_OBJECTS = v8heapconst.KNOWN_OBJECTS
FRAME_MARKERS = v8heapconst.FRAME_MARKERS
# Markers pushed on the stack by PushStackTraceAndDie
MAGIC_MARKER_PAIRS = (
(0xbbbbbbbb, 0xbbbbbbbb),
(0xfefefefe, 0xfefefeff),
)
# See StackTraceFailureMessage in isolate.h
STACK_TRACE_MARKER = 0xdecade30
# See FailureMessage in logging.cc
ERROR_MESSAGE_MARKER = 0xdecade10
# Set of structures and constants that describe the layout of minidump
# files. Based on MSDN and Google Breakpad.
MINIDUMP_HEADER = Descriptor([
("signature", ctypes.c_uint32),
("version", ctypes.c_uint32),
("stream_count", ctypes.c_uint32),
("stream_directories_rva", ctypes.c_uint32),
("checksum", ctypes.c_uint32),
("time_date_stampt", ctypes.c_uint32),
("flags", ctypes.c_uint64)
])
MINIDUMP_LOCATION_DESCRIPTOR = Descriptor([
("data_size", ctypes.c_uint32),
("rva", ctypes.c_uint32)
])
MINIDUMP_STRING = Descriptor([
("length", ctypes.c_uint32),
("buffer", lambda t: ctypes.c_uint8 * (t.length + 2))
])
MINIDUMP_DIRECTORY = Descriptor([
("stream_type", ctypes.c_uint32),
("location", MINIDUMP_LOCATION_DESCRIPTOR.ctype)
])
MD_EXCEPTION_MAXIMUM_PARAMETERS = 15
MINIDUMP_EXCEPTION = Descriptor([
("code", ctypes.c_uint32),
("flags", ctypes.c_uint32),
("record", ctypes.c_uint64),
("address", ctypes.c_uint64),
("parameter_count", ctypes.c_uint32),
("unused_alignment", ctypes.c_uint32),
("information", ctypes.c_uint64 * MD_EXCEPTION_MAXIMUM_PARAMETERS)
])
MINIDUMP_EXCEPTION_STREAM = Descriptor([
("thread_id", ctypes.c_uint32),
("unused_alignment", ctypes.c_uint32),
("exception", MINIDUMP_EXCEPTION.ctype),
("thread_context", MINIDUMP_LOCATION_DESCRIPTOR.ctype)
])
# Stream types.
MD_UNUSED_STREAM = 0
MD_RESERVED_STREAM_0 = 1
MD_RESERVED_STREAM_1 = 2
MD_THREAD_LIST_STREAM = 3
MD_MODULE_LIST_STREAM = 4
MD_MEMORY_LIST_STREAM = 5
MD_EXCEPTION_STREAM = 6
MD_SYSTEM_INFO_STREAM = 7
MD_THREAD_EX_LIST_STREAM = 8
MD_MEMORY_64_LIST_STREAM = 9
MD_COMMENT_STREAM_A = 10
MD_COMMENT_STREAM_W = 11
MD_HANDLE_DATA_STREAM = 12
MD_FUNCTION_TABLE_STREAM = 13
MD_UNLOADED_MODULE_LIST_STREAM = 14
MD_MISC_INFO_STREAM = 15
MD_MEMORY_INFO_LIST_STREAM = 16
MD_THREAD_INFO_LIST_STREAM = 17
MD_HANDLE_OPERATION_LIST_STREAM = 18
MD_FLOATINGSAVEAREA_X86_REGISTERAREA_SIZE = 80
MINIDUMP_FLOATING_SAVE_AREA_X86 = Descriptor([
("control_word", ctypes.c_uint32),
("status_word", ctypes.c_uint32),
("tag_word", ctypes.c_uint32),
("error_offset", ctypes.c_uint32),
("error_selector", ctypes.c_uint32),
("data_offset", ctypes.c_uint32),
("data_selector", ctypes.c_uint32),
("register_area", ctypes.c_uint8 * MD_FLOATINGSAVEAREA_X86_REGISTERAREA_SIZE),
("cr0_npx_state", ctypes.c_uint32)
])
MD_CONTEXT_X86_EXTENDED_REGISTERS_SIZE = 512
# Context flags.
MD_CONTEXT_X86 = 0x00010000
MD_CONTEXT_X86_CONTROL = (MD_CONTEXT_X86 | 0x00000001)
MD_CONTEXT_X86_INTEGER = (MD_CONTEXT_X86 | 0x00000002)
MD_CONTEXT_X86_SEGMENTS = (MD_CONTEXT_X86 | 0x00000004)
MD_CONTEXT_X86_FLOATING_POINT = (MD_CONTEXT_X86 | 0x00000008)
MD_CONTEXT_X86_DEBUG_REGISTERS = (MD_CONTEXT_X86 | 0x00000010)
MD_CONTEXT_X86_EXTENDED_REGISTERS = (MD_CONTEXT_X86 | 0x00000020)
def EnableOnFlag(type, flag):
return lambda o: [None, type][int((o.context_flags & flag) != 0)]
MINIDUMP_CONTEXT_X86 = Descriptor([
("context_flags", ctypes.c_uint32),
# MD_CONTEXT_X86_DEBUG_REGISTERS.
("dr0", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
("dr1", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
("dr2", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
("dr3", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
("dr6", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
("dr7", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_DEBUG_REGISTERS)),
# MD_CONTEXT_X86_FLOATING_POINT.
("float_save", EnableOnFlag(MINIDUMP_FLOATING_SAVE_AREA_X86.ctype,
MD_CONTEXT_X86_FLOATING_POINT)),
# MD_CONTEXT_X86_SEGMENTS.
("gs", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_SEGMENTS)),
("fs", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_SEGMENTS)),
("es", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_SEGMENTS)),
("ds", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_SEGMENTS)),
# MD_CONTEXT_X86_INTEGER.
("edi", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
("esi", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
("ebx", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
("edx", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
("ecx", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
("eax", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_INTEGER)),
# MD_CONTEXT_X86_CONTROL.
("ebp", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
("eip", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
("cs", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
("eflags", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
("esp", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
("ss", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_X86_CONTROL)),
# MD_CONTEXT_X86_EXTENDED_REGISTERS.
("extended_registers",
EnableOnFlag(ctypes.c_uint8 * MD_CONTEXT_X86_EXTENDED_REGISTERS_SIZE,
MD_CONTEXT_X86_EXTENDED_REGISTERS))
])
MD_CONTEXT_ARM = 0x40000000
MD_CONTEXT_ARM_INTEGER = (MD_CONTEXT_ARM | 0x00000002)
MD_CONTEXT_ARM_FLOATING_POINT = (MD_CONTEXT_ARM | 0x00000004)
MD_FLOATINGSAVEAREA_ARM_FPR_COUNT = 32
MD_FLOATINGSAVEAREA_ARM_FPEXTRA_COUNT = 8
MINIDUMP_FLOATING_SAVE_AREA_ARM = Descriptor([
("fpscr", ctypes.c_uint64),
("regs", ctypes.c_uint64 * MD_FLOATINGSAVEAREA_ARM_FPR_COUNT),
("extra", ctypes.c_uint64 * MD_FLOATINGSAVEAREA_ARM_FPEXTRA_COUNT)
])
MINIDUMP_CONTEXT_ARM = Descriptor([
("context_flags", ctypes.c_uint32),
# MD_CONTEXT_ARM_INTEGER.
("r0", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r1", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r2", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r3", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r4", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r5", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r6", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r7", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r8", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r9", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r10", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r11", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("r12", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("sp", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("lr", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("pc", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_ARM_INTEGER)),
("cpsr", ctypes.c_uint32),
("float_save", EnableOnFlag(MINIDUMP_FLOATING_SAVE_AREA_ARM.ctype,
MD_CONTEXT_ARM_FLOATING_POINT))
])
MD_CONTEXT_ARM64 = 0x80000000
MD_CONTEXT_ARM64_INTEGER = (MD_CONTEXT_ARM64 | 0x00000002)
MD_CONTEXT_ARM64_FLOATING_POINT = (MD_CONTEXT_ARM64 | 0x00000004)
MD_FLOATINGSAVEAREA_ARM64_FPR_COUNT = 64
MINIDUMP_FLOATING_SAVE_AREA_ARM = Descriptor([
("fpscr", ctypes.c_uint64),
("regs", ctypes.c_uint64 * MD_FLOATINGSAVEAREA_ARM64_FPR_COUNT),
])
MINIDUMP_CONTEXT_ARM64 = Descriptor([
("context_flags", ctypes.c_uint64),
# MD_CONTEXT_ARM64_INTEGER.
("r0", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r1", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r2", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r3", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r4", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r5", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r6", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r7", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r8", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r9", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r10", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r11", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r12", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r13", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r14", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r15", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r16", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r17", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r18", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r19", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r20", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r21", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r22", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r23", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r24", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r25", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r26", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r27", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("r28", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("fp", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("lr", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("sp", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("pc", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_ARM64_INTEGER)),
("cpsr", ctypes.c_uint32),
("float_save", EnableOnFlag(MINIDUMP_FLOATING_SAVE_AREA_ARM.ctype,
MD_CONTEXT_ARM64_FLOATING_POINT))
])
MD_CONTEXT_AMD64 = 0x00100000
MD_CONTEXT_AMD64_CONTROL = (MD_CONTEXT_AMD64 | 0x00000001)
MD_CONTEXT_AMD64_INTEGER = (MD_CONTEXT_AMD64 | 0x00000002)
MD_CONTEXT_AMD64_SEGMENTS = (MD_CONTEXT_AMD64 | 0x00000004)
MD_CONTEXT_AMD64_FLOATING_POINT = (MD_CONTEXT_AMD64 | 0x00000008)
MD_CONTEXT_AMD64_DEBUG_REGISTERS = (MD_CONTEXT_AMD64 | 0x00000010)
MINIDUMP_CONTEXT_AMD64 = Descriptor([
("p1_home", ctypes.c_uint64),
("p2_home", ctypes.c_uint64),
("p3_home", ctypes.c_uint64),
("p4_home", ctypes.c_uint64),
("p5_home", ctypes.c_uint64),
("p6_home", ctypes.c_uint64),
("context_flags", ctypes.c_uint32),
("mx_csr", ctypes.c_uint32),
# MD_CONTEXT_AMD64_CONTROL.
("cs", EnableOnFlag(ctypes.c_uint16, MD_CONTEXT_AMD64_CONTROL)),
# MD_CONTEXT_AMD64_SEGMENTS
("ds", EnableOnFlag(ctypes.c_uint16, MD_CONTEXT_AMD64_SEGMENTS)),
("es", EnableOnFlag(ctypes.c_uint16, MD_CONTEXT_AMD64_SEGMENTS)),
("fs", EnableOnFlag(ctypes.c_uint16, MD_CONTEXT_AMD64_SEGMENTS)),
("gs", EnableOnFlag(ctypes.c_uint16, MD_CONTEXT_AMD64_SEGMENTS)),
# MD_CONTEXT_AMD64_CONTROL.
("ss", EnableOnFlag(ctypes.c_uint16, MD_CONTEXT_AMD64_CONTROL)),
("eflags", EnableOnFlag(ctypes.c_uint32, MD_CONTEXT_AMD64_CONTROL)),
# MD_CONTEXT_AMD64_DEBUG_REGISTERS.
("dr0", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
("dr1", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
("dr2", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
("dr3", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
("dr6", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
("dr7", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
# MD_CONTEXT_AMD64_INTEGER.
("rax", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("rcx", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("rdx", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("rbx", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
# MD_CONTEXT_AMD64_CONTROL.
("rsp", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_CONTROL)),
# MD_CONTEXT_AMD64_INTEGER.
("rbp", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("rsi", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("rdi", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("r8", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("r9", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("r10", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("r11", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("r12", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("r13", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("r14", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
("r15", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_INTEGER)),
# MD_CONTEXT_AMD64_CONTROL.
("rip", EnableOnFlag(ctypes.c_uint64, MD_CONTEXT_AMD64_CONTROL)),
# MD_CONTEXT_AMD64_FLOATING_POINT
("sse_registers", EnableOnFlag(ctypes.c_uint8 * (16 * 26),
MD_CONTEXT_AMD64_FLOATING_POINT)),
("vector_registers", EnableOnFlag(ctypes.c_uint8 * (16 * 26),
MD_CONTEXT_AMD64_FLOATING_POINT)),
("vector_control", EnableOnFlag(ctypes.c_uint64,
MD_CONTEXT_AMD64_FLOATING_POINT)),
# MD_CONTEXT_AMD64_DEBUG_REGISTERS.
("debug_control", EnableOnFlag(ctypes.c_uint64,
MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
("last_branch_to_rip", EnableOnFlag(ctypes.c_uint64,
MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
("last_branch_from_rip", EnableOnFlag(ctypes.c_uint64,
MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
("last_exception_to_rip", EnableOnFlag(ctypes.c_uint64,
MD_CONTEXT_AMD64_DEBUG_REGISTERS)),
("last_exception_from_rip", EnableOnFlag(ctypes.c_uint64,
MD_CONTEXT_AMD64_DEBUG_REGISTERS))
])
MINIDUMP_MEMORY_DESCRIPTOR = Descriptor([
("start", ctypes.c_uint64),
("memory", MINIDUMP_LOCATION_DESCRIPTOR.ctype)
])
MINIDUMP_MEMORY_DESCRIPTOR64 = Descriptor([
("start", ctypes.c_uint64),
("size", ctypes.c_uint64)
])
MINIDUMP_MEMORY_LIST = Descriptor([
("range_count", ctypes.c_uint32),
("ranges", lambda m: MINIDUMP_MEMORY_DESCRIPTOR.ctype * m.range_count)
])
MINIDUMP_MEMORY_LIST_Mac = Descriptor([
("range_count", ctypes.c_uint32),
("junk", ctypes.c_uint32),
("ranges", lambda m: MINIDUMP_MEMORY_DESCRIPTOR.ctype * m.range_count)
])
MINIDUMP_MEMORY_LIST64 = Descriptor([
("range_count", ctypes.c_uint64),
("base_rva", ctypes.c_uint64),
("ranges", lambda m: MINIDUMP_MEMORY_DESCRIPTOR64.ctype * m.range_count)
])
MINIDUMP_THREAD = Descriptor([
("id", ctypes.c_uint32),
("suspend_count", ctypes.c_uint32),
("priority_class", ctypes.c_uint32),
("priority", ctypes.c_uint32),
("ted", ctypes.c_uint64),
("stack", MINIDUMP_MEMORY_DESCRIPTOR.ctype),
("context", MINIDUMP_LOCATION_DESCRIPTOR.ctype)
])
MINIDUMP_THREAD_LIST = Descriptor([
("thread_count", ctypes.c_uint32),
("threads", lambda t: MINIDUMP_THREAD.ctype * t.thread_count)
])
MINIDUMP_THREAD_LIST_Mac = Descriptor([
("thread_count", ctypes.c_uint32),
("junk", ctypes.c_uint32),
("threads", lambda t: MINIDUMP_THREAD.ctype * t.thread_count)
])
MINIDUMP_VS_FIXEDFILEINFO = Descriptor([
("dwSignature", ctypes.c_uint32),
("dwStrucVersion", ctypes.c_uint32),
("dwFileVersionMS", ctypes.c_uint32),
("dwFileVersionLS", ctypes.c_uint32),
("dwProductVersionMS", ctypes.c_uint32),
("dwProductVersionLS", ctypes.c_uint32),
("dwFileFlagsMask", ctypes.c_uint32),
("dwFileFlags", ctypes.c_uint32),
("dwFileOS", ctypes.c_uint32),
("dwFileType", ctypes.c_uint32),
("dwFileSubtype", ctypes.c_uint32),
("dwFileDateMS", ctypes.c_uint32),
("dwFileDateLS", ctypes.c_uint32)
])
MINIDUMP_RAW_MODULE = Descriptor([
("base_of_image", ctypes.c_uint64),
("size_of_image", ctypes.c_uint32),
("checksum", ctypes.c_uint32),
("time_date_stamp", ctypes.c_uint32),
("module_name_rva", ctypes.c_uint32),
("version_info", MINIDUMP_VS_FIXEDFILEINFO.ctype),
("cv_record", MINIDUMP_LOCATION_DESCRIPTOR.ctype),
("misc_record", MINIDUMP_LOCATION_DESCRIPTOR.ctype),
("reserved0", ctypes.c_uint32 * 2),
("reserved1", ctypes.c_uint32 * 2)
])
MINIDUMP_MODULE_LIST = Descriptor([
("number_of_modules", ctypes.c_uint32),
("modules", lambda t: MINIDUMP_RAW_MODULE.ctype * t.number_of_modules)
])
MINIDUMP_MODULE_LIST_Mac = Descriptor([
("number_of_modules", ctypes.c_uint32),
("junk", ctypes.c_uint32),
("modules", lambda t: MINIDUMP_RAW_MODULE.ctype * t.number_of_modules)
])
MINIDUMP_RAW_SYSTEM_INFO = Descriptor([
("processor_architecture", ctypes.c_uint16)
])
MD_CPU_ARCHITECTURE_X86 = 0
MD_CPU_ARCHITECTURE_ARM = 5
# Breakpad used a custom value of 0x8003 here; Crashpad uses the new
# standardized value 12.
MD_CPU_ARCHITECTURE_ARM64 = 12
MD_CPU_ARCHITECTURE_ARM64_BREAKPAD_LEGACY = 0x8003
MD_CPU_ARCHITECTURE_AMD64 = 9
OBJDUMP_BIN = None
DEFAULT_OBJDUMP_BIN = '/usr/bin/objdump'
class FuncSymbol:
def __init__(self, start, size, name):
self.start = start
self.end = self.start + size
self.name = name
def __cmp__(self, other):
if isinstance(other, FuncSymbol):
return self.start - other.start
return self.start - other
def Covers(self, addr):
return (self.start <= addr) and (addr < self.end)
class MinidumpReader(object):
"""Minidump (.dmp) reader."""
_HEADER_MAGIC = 0x504d444d
def __init__(self, options, minidump_name):
self.minidump_name = minidump_name
if sys.platform == 'win32':
self.minidump_file = open(minidump_name, "a+")
self.minidump = mmap.mmap(self.minidump_file.fileno(), 0)
else:
self.minidump_file = open(minidump_name, "r")
self.minidump = mmap.mmap(self.minidump_file.fileno(), 0, mmap.MAP_PRIVATE)
self.header = MINIDUMP_HEADER.Read(self.minidump, 0)
if self.header.signature != MinidumpReader._HEADER_MAGIC:
print("Warning: Unsupported minidump header magic!", file=sys.stderr)
DebugPrint(self.header)
directories = []
offset = self.header.stream_directories_rva
for _ in range(self.header.stream_count):
directories.append(MINIDUMP_DIRECTORY.Read(self.minidump, offset))
offset += MINIDUMP_DIRECTORY.size
self.arch = None
self.exception = None
self.exception_context = None
self.memory_list = None
self.memory_list64 = None
self.module_list = None
self.thread_map = {}
self.symdir = options.symdir
self.modules_with_symbols = []
self.symbols = []
self._ReadArchitecture(directories)
self._ReadDirectories(directories)
self._FindObjdump(options)
def _ReadArchitecture(self, directories):
# Find MDRawSystemInfo stream and determine arch.
for d in directories:
if d.stream_type == MD_SYSTEM_INFO_STREAM:
system_info = MINIDUMP_RAW_SYSTEM_INFO.Read(
self.minidump, d.location.rva)
self.arch = system_info.processor_architecture
if self.arch == MD_CPU_ARCHITECTURE_ARM64_BREAKPAD_LEGACY:
self.arch = MD_CPU_ARCHITECTURE_ARM64
assert self.arch in [MD_CPU_ARCHITECTURE_AMD64,
MD_CPU_ARCHITECTURE_ARM,
MD_CPU_ARCHITECTURE_ARM64,
MD_CPU_ARCHITECTURE_X86]
assert not self.arch is None
def _ReadDirectories(self, directories):
for d in directories:
DebugPrint(d)
if d.stream_type == MD_EXCEPTION_STREAM:
self.exception = MINIDUMP_EXCEPTION_STREAM.Read(
self.minidump, d.location.rva)
DebugPrint(self.exception)
self.exception_context = self.ContextDescriptor().Read(
self.minidump, self.exception.thread_context.rva)
DebugPrint(self.exception_context)
elif d.stream_type == MD_THREAD_LIST_STREAM:
thread_list = MINIDUMP_THREAD_LIST.Read(self.minidump, d.location.rva)
if ctypes.sizeof(thread_list) + 4 == d.location.data_size:
thread_list = MINIDUMP_THREAD_LIST_Mac.Read(
self.minidump, d.location.rva)
assert ctypes.sizeof(thread_list) == d.location.data_size
DebugPrint(thread_list)
for thread in thread_list.threads:
DebugPrint(thread)
self.thread_map[thread.id] = thread
elif d.stream_type == MD_MODULE_LIST_STREAM:
assert self.module_list is None
self.module_list = MINIDUMP_MODULE_LIST.Read(
self.minidump, d.location.rva)
if ctypes.sizeof(self.module_list) + 4 == d.location.data_size:
self.module_list = MINIDUMP_MODULE_LIST_Mac.Read(
self.minidump, d.location.rva)
assert ctypes.sizeof(self.module_list) == d.location.data_size
DebugPrint(self.module_list)
elif d.stream_type == MD_MEMORY_LIST_STREAM:
print("Warning: This is not a full minidump!", file=sys.stderr)
assert self.memory_list is None
self.memory_list = MINIDUMP_MEMORY_LIST.Read(
self.minidump, d.location.rva)
if ctypes.sizeof(self.memory_list) + 4 == d.location.data_size:
self.memory_list = MINIDUMP_MEMORY_LIST_Mac.Read(
self.minidump, d.location.rva)
assert ctypes.sizeof(self.memory_list) == d.location.data_size
DebugPrint(self.memory_list)
elif d.stream_type == MD_MEMORY_64_LIST_STREAM:
assert self.memory_list64 is None
self.memory_list64 = MINIDUMP_MEMORY_LIST64.Read(
self.minidump, d.location.rva)
assert ctypes.sizeof(self.memory_list64) == d.location.data_size
DebugPrint(self.memory_list64)
def _FindObjdump(self, options):
if options.objdump:
objdump_bin = options.objdump
else:
objdump_bin = self._FindThirdPartyObjdump()
if not objdump_bin or not os.path.exists(objdump_bin):
print("# Cannot find '%s', falling back to default objdump '%s'" % (
objdump_bin, DEFAULT_OBJDUMP_BIN))
objdump_bin = DEFAULT_OBJDUMP_BIN
global OBJDUMP_BIN
OBJDUMP_BIN = objdump_bin
disasm.OBJDUMP_BIN = objdump_bin
def _FindThirdPartyObjdump(self):
# Try to find the platform specific objdump
third_party_dir = os.path.join(
os.path.dirname(os.path.dirname(__file__)), 'third_party')
objdumps = []
for root, dirs, files in os.walk(third_party_dir):
for file in files:
if file.endswith("objdump"):
objdumps.append(os.path.join(root, file))
if self.arch == MD_CPU_ARCHITECTURE_ARM:
platform_filter = 'arm-linux'
elif self.arch == MD_CPU_ARCHITECTURE_ARM64:
platform_filter = 'aarch64'
else:
# use default otherwise
return None
print(("# Looking for platform specific (%s) objdump in "
"third_party directory.") % platform_filter)
objdumps = filter(lambda file: platform_filter in file >= 0, objdumps)
if len(objdumps) == 0:
print("# Could not find platform specific objdump in third_party.")
print("# Make sure you installed the correct SDK.")
return None
return objdumps[0]
def ContextDescriptor(self):
if self.arch == MD_CPU_ARCHITECTURE_X86:
return MINIDUMP_CONTEXT_X86
elif self.arch == MD_CPU_ARCHITECTURE_AMD64:
return MINIDUMP_CONTEXT_AMD64
elif self.arch == MD_CPU_ARCHITECTURE_ARM:
return MINIDUMP_CONTEXT_ARM
elif self.arch == MD_CPU_ARCHITECTURE_ARM64:
return MINIDUMP_CONTEXT_ARM64
else:
return None
def IsValidAlignedAddress(self, address):
return self.IsAlignedAddress(address) and self.IsValidAddress(address)
def IsValidAddress(self, address):
return self.FindLocation(address) is not None
def IsAlignedAddress(self, address):
return (address % self.PointerSize()) == 0
def IsExceptionStackAddress(self, address):
if not self.IsAlignedAddress(address): return False
return self.IsAnyExceptionStackAddress(address)
def IsAnyExceptionStackAddress(self, address):
return self.StackTop() <= address <= self.StackBottom()
def IsValidExceptionStackAddress(self, address):
if not self.IsValidAddress(address): return False
return self.IsExceptionStackAddress(address)
def IsModuleAddress(self, address):
return self.GetModuleForAddress(address) != None
def GetModuleForAddress(self, address):
for module in self.module_list.modules:
start = module.base_of_image
end = start + module.size_of_image
if start <= address < end: return module
return 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 ReadU64(self, address):
location = self.FindLocation(address)
return ctypes.c_uint64.from_buffer(self.minidump, location).value
def Is64(self):
return (self.arch == MD_CPU_ARCHITECTURE_ARM64 or
self.arch == MD_CPU_ARCHITECTURE_AMD64)
def ReadUIntPtr(self, address):
if self.Is64():
return self.ReadU64(address)
return self.ReadU32(address)
def ReadBytes(self, address, size):
location = self.FindLocation(address)
return self.minidump[location:location + size]
def _ReadWord(self, location):
if self.Is64():
return ctypes.c_uint64.from_buffer(self.minidump, location).value
return ctypes.c_uint32.from_buffer(self.minidump, location).value
def ReadAsciiPtr(self, address):
ascii_content = [c if c >= '\x20' and c < '\x7f' else '.'
for c in self.ReadBytes(address, self.PointerSize())]
return ''.join(ascii_content)
def ReadAsciiString(self, address):
string = ""
while self.IsValidAddress(address):
code = self.ReadU8(address)
if 0 < code < 128:
string += chr(code)
else:
break
address += 1
return string
def IsProbableASCIIRegion(self, location, length):
ascii_bytes = 0
non_ascii_bytes = 0
for i in range(length):
loc = location + i
byte = ctypes.c_uint8.from_buffer(self.minidump, loc).value
if byte >= 0x7f:
non_ascii_bytes += 1
if byte < 0x20 and byte != 0:
non_ascii_bytes += 1
if byte < 0x7f and byte >= 0x20:
ascii_bytes += 1
if byte == 0xa: # newline
ascii_bytes += 1
if ascii_bytes * 10 <= length:
return False
if length > 0 and ascii_bytes > non_ascii_bytes * 7:
return True
if ascii_bytes > non_ascii_bytes * 3:
return None # Maybe
return False
def IsProbableExecutableRegion(self, location, length):
opcode_bytes = 0
sixty_four = self.Is64()
for i in range(length):
loc = location + i
byte = ctypes.c_uint8.from_buffer(self.minidump, loc).value
if (byte == 0x8b or # mov
byte == 0x89 or # mov reg-reg
(byte & 0xf0) == 0x50 or # push/pop
(sixty_four and (byte & 0xf0) == 0x40) or # rex prefix
byte == 0xc3 or # return
byte == 0x74 or # jeq
byte == 0x84 or # jeq far
byte == 0x75 or # jne
byte == 0x85 or # jne far
byte == 0xe8 or # call
byte == 0xe9 or # jmp far
byte == 0xeb): # jmp near
opcode_bytes += 1
opcode_percent = (opcode_bytes * 100) / length
threshold = 20
if opcode_percent > threshold + 2:
return True
if opcode_percent > threshold - 2:
return None # Maybe
return False
def FindRegion(self, addr):
answer = [-1, -1]
def is_in(reader, start, size, location):
if addr >= start and addr < start + size:
answer[0] = start
answer[1] = size
self.ForEachMemoryRegion(is_in)
if answer[0] == -1:
return None
return answer
def ForEachMemoryRegion(self, cb):
if self.memory_list64 is not None:
for r in self.memory_list64.ranges:
location = self.memory_list64.base_rva + offset
cb(self, r.start, r.size, location)
offset += r.size
if self.memory_list is not None:
for r in self.memory_list.ranges:
cb(self, r.start, r.memory.data_size, r.memory.rva)
def FindWord(self, word, alignment=0):
def search_inside_region(reader, start, size, location):
location = (location + alignment) & ~alignment
for i in range(size - self.PointerSize()):
loc = location + i
if reader._ReadWord(loc) == word:
slot = start + (loc - location)
print("%s: %s" % (reader.FormatIntPtr(slot),
reader.FormatIntPtr(word)))
self.ForEachMemoryRegion(search_inside_region)
def FindWordList(self, word):
aligned_res = []
unaligned_res = []
def search_inside_region(reader, start, size, location):
for i in range(size - self.PointerSize()):
loc = location + i
if reader._ReadWord(loc) == word:
slot = start + (loc - location)
if self.IsAlignedAddress(slot):
aligned_res.append(slot)
else:
unaligned_res.append(slot)
self.ForEachMemoryRegion(search_inside_region)
return (aligned_res, unaligned_res)
def FindLocation(self, address):
offset = 0
if self.memory_list64 is not None:
for r in self.memory_list64.ranges:
if r.start <= address < r.start + r.size:
return self.memory_list64.base_rva + offset + address - r.start
offset += r.size
if self.memory_list is not None:
for r in self.memory_list.ranges:
if r.start <= address < r.start + r.memory.data_size:
return r.memory.rva + address - r.start
return None
def GetDisasmLines(self, address, size):
def CountUndefinedInstructions(lines):
pattern = "<UNDEFINED>"
return sum([line.count(pattern) for (ignore, line) in lines])
location = self.FindLocation(address)
if location is None: return []
arch = None
possible_objdump_flags = [""]
if self.arch == MD_CPU_ARCHITECTURE_X86:
arch = "ia32"
elif self.arch == MD_CPU_ARCHITECTURE_ARM:
arch = "arm"
possible_objdump_flags = ["", "--disassembler-options=force-thumb"]
elif self.arch == MD_CPU_ARCHITECTURE_ARM64:
arch = "arm64"
possible_objdump_flags = ["", "--disassembler-options=force-thumb"]
elif self.arch == MD_CPU_ARCHITECTURE_AMD64:
arch = "x64"
results = [ disasm.GetDisasmLines(self.minidump_name,
location,
size,
arch,
False,
objdump_flags)
for objdump_flags in possible_objdump_flags ]
return min(results, key=CountUndefinedInstructions)
def Dispose(self):
self.minidump.close()
self.minidump_file.close()
def ExceptionIP(self):
if self.arch == MD_CPU_ARCHITECTURE_AMD64:
return self.exception_context.rip
elif self.arch == MD_CPU_ARCHITECTURE_ARM:
return self.exception_context.pc
elif self.arch == MD_CPU_ARCHITECTURE_ARM64:
return self.exception_context.pc
elif self.arch == MD_CPU_ARCHITECTURE_X86:
return self.exception_context.eip
def ExceptionSP(self):
if self.arch == MD_CPU_ARCHITECTURE_AMD64:
return self.exception_context.rsp
elif self.arch == MD_CPU_ARCHITECTURE_ARM:
return self.exception_context.sp
elif self.arch == MD_CPU_ARCHITECTURE_ARM64:
return self.exception_context.sp
elif self.arch == MD_CPU_ARCHITECTURE_X86:
return self.exception_context.esp
def ExceptionFP(self):