#!/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. import BaseHTTPServer import bisect import cgi import cmd import codecs import ctypes import datetime import disasm 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 _maxWidth = max(map(lambda s: len(s), fields)) _pack_ = 1 def __str__(self): return "{" + ", ".join("%s: %s" % (str(field).ljust(_maxWidth), 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 xrange(0, size, 16): slot = i + location hex_line = "" asc_line = "" for i in xrange(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 xrange(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 # 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 MD_CPU_ARCHITECTURE_ARM64 = 0x8003 MD_CPU_ARCHITECTURE_AMD64 = 9 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 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 >>sys.stderr, "Warning: Unsupported minidump header magic!" DebugPrint(self.header) directories = [] offset = self.header.stream_directories_rva for _ in xrange(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 = [] # 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 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 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) if self.arch == MD_CPU_ARCHITECTURE_X86: self.exception_context = MINIDUMP_CONTEXT_X86.Read( self.minidump, self.exception.thread_context.rva) elif self.arch == MD_CPU_ARCHITECTURE_AMD64: self.exception_context = MINIDUMP_CONTEXT_AMD64.Read( self.minidump, self.exception.thread_context.rva) elif self.arch == MD_CPU_ARCHITECTURE_ARM: self.exception_context = MINIDUMP_CONTEXT_ARM.Read( self.minidump, self.exception.thread_context.rva) elif self.arch == MD_CPU_ARCHITECTURE_ARM64: self.exception_context = MINIDUMP_CONTEXT_ARM64.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 >>sys.stderr, "Warning: This is not a full minidump!" 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 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.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 IsProbableASCIIRegion(self, location, length): ascii_bytes = 0 non_ascii_bytes = 0 for i in xrange(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 xrange(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 xrange(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 xrange(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 = "" 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): if self.arch == MD_CPU_ARCHITECTURE_AMD64: return self.exception_context.rbp elif self.arch == MD_CPU_ARCHITECTURE_ARM: return None elif self.arch == MD_CPU_ARCHITECTURE_ARM64: return self.exception_context.fp elif self.arch == MD_CPU_ARCHITECTURE_X86: return self.exception_context.ebp def ExceptionThread(self): return self.thread_map[self.exception.thread_id] def StackTop(self): return self.ExceptionSP() def StackBottom(self): exception_thread = self.ExceptionThread() return exception_thread.stack.start + \ exception_thread.stack.memory.data_size def FormatIntPtr(self, value): if self.Is64(): return "%016x" % value return "%08x" % value def PointerSize(self): if self.Is64(): return 8 return 4 def Register(self, name): return self.exception_context.__getattribute__(name) def ReadMinidumpString(self, rva): string = bytearray(MINIDUMP_STRING.Read(self.minidump, rva).buffer) string = string.decode("utf16") return string[0:len(string) - 1] # Load FUNC records from a BreakPad symbol file # # http://code.google.com/p/google-breakpad/wiki/SymbolFiles # def _LoadSymbolsFrom(self, symfile, baseaddr): print "Loading symbols from %s" % (symfile) funcs = [] with open(symfile) as f: for line in f: result = re.match( r"^FUNC ([a-f0-9]+) ([a-f0-9]+) ([a-f0-9]+) (.*)$", line) if result is not None: start = int(result.group(1), 16) size = int(result.group(2), 16) name = result.group(4).rstrip() bisect.insort_left(self.symbols, FuncSymbol(baseaddr + start, size, name)) print " ... done" def TryLoadSymbolsFor(self, modulename, module): try: symfile = os.path.join(self.symdir, modulename.replace('.', '_') + ".pdb.sym") if os.path.isfile(symfile): self._LoadSymbolsFrom(symfile, module.base_of_image) self.modules_with_symbols.append(module) except Exception as e: print " ... failure (%s)" % (e) # Returns true if address is covered by some module that has loaded symbols. def _IsInModuleWithSymbols(self, addr): for module in self.modules_with_symbols: start = module.base_of_image end = start + module.size_of_image if (start <= addr) and (addr < end): return True return False # Find symbol covering the given address and return its name in format # + def FindSymbol(self, addr): if not self._IsInModuleWithSymbols(addr): return None i = bisect.bisect_left(self.symbols, addr) symbol = None if (0 < i) and self.symbols[i - 1].Covers(addr): symbol = self.symbols[i - 1] elif (i < len(self.symbols)) and self.symbols[i].Covers(addr): symbol = self.symbols[i] else: return None diff = addr - symbol.start return "%s+0x%x" % (symbol.name, diff) 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]) # Compute the actual call target which the disassembler is too stupid # to figure out (it adds the call offset to the disassembly offset rather # than the absolute instruction address). if heap.reader.arch == MD_CPU_ARCHITECTURE_X86: if code.startswith("e8"): words = code.split() if len(words) > 6 and words[5] == "call": offset = int(words[4] + words[3] + words[2] + words[1], 16) target = (line_address + offset + 5) & 0xFFFFFFFF code = code.replace(words[6], "0x%08x" % target) # TODO(jkummerow): port this hack to ARM and x64. 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): instance_type = "???" if self.map is not None: instance_type = INSTANCE_TYPES[self.map.instance_type] return "HeapObject(%s, %s)" % (self.heap.reader.FormatIntPtr(self.address), instance_type) def ObjectField(self, offset): field_value = self.heap.reader.ReadUIntPtr(self.address + offset) return self.heap.FindObjectOrSmi(field_value) def SmiField(self, offset): field_value = self.heap.reader.ReadUIntPtr(self.address + offset) if self.heap.IsSmi(field_value): return self.heap.SmiUntag(field_value) return None class Map(HeapObject): def Decode(self, offset, size, value): return (value >> offset) & ((1 << size) - 1) # Instance Sizes def InstanceSizesOffset(self): return self.heap.PointerSize() def InstanceSizeOffset(self): return self.InstanceSizesOffset() def InObjectProperties(self): return self.InstanceSizeOffset() + 1 def UnusedByte(self): return self.InObjectProperties() + 1 def VisitorId(self): return self.UnusedByte() + 1 # Instance Attributes def InstanceAttributesOffset(self): return self.InstanceSizesOffset() + self.heap.IntSize() def InstanceTypeOffset(self): return self.InstanceAttributesOffset() def BitFieldOffset(self): return self.InstanceTypeOffset() + 1 def BitField2Offset(self): return self.BitFieldOffset() + 1 def UnusedPropertyFieldsOffset(self): return self.BitField2Offset() + 1 # Other fields def BitField3Offset(self): return self.InstanceAttributesOffset() + self.heap.IntSize() def PrototypeOffset(self): return self.BitField3Offset() + self.heap.PointerSize() def ConstructorOrBackPointerOffset(self): return self.PrototypeOffset() + self.heap.PointerSize() def TransitionsOrPrototypeInfoOffset(self): return self.ConstructorOrBackPointerOffset() + self.heap.PointerSize() def DescriptorsOffset(self): return self.TransitionsOrPrototypeInfoOffset() + self.heap.PointerSize() def LayoutDescriptorOffset(self): return self.DescriptorsOffset() + self.heap.PointerSize() def CodeCacheOffset(self): if (self.heap.reader.Is64()): return self.LayoutDescriptorOffset() + self.heap.PointerSize() return self.DescriptorsOffset() + self.heap.PointerSize() def DependentCodeOffset(self): return self.CodeCacheOffset() + self.heap.PointerSize() def WeakCellCacheOffset(self): return self.DependentCodeOffset() + self.heap.PointerSize() def ReadByte(self, offset): return self.heap.reader.ReadU8(self.address + offset) def ReadWord(self, offset): return self.heap.reader.ReadUIntPtr(self.address + offset) def Print(self, p): p.Print("Map(%08x)" % (self.address)) p.Print(" - size: %d, inobject: %d, (unused: %d), visitor: %d" % ( self.ReadByte(self.InstanceSizeOffset()), self.ReadByte(self.InObjectProperties()), self.ReadByte(self.UnusedByte()), self.VisitorId())) instance_type = INSTANCE_TYPES[self.ReadByte(self.InstanceTypeOffset())] bitfield = self.ReadByte(self.BitFieldOffset()) bitfield2 = self.ReadByte(self.BitField2Offset()) unused = self.ReadByte(self.UnusedPropertyFieldsOffset()) p.Print(" - %s, bf: %d, bf2: %d, unused: %d" % ( instance_type, bitfield, bitfield2, unused)) p.Print(" - kind: %s" % (self.Decode(3, 5, bitfield2))) bitfield3 = self.ReadWord(self.BitField3Offset()) p.Print( " - EnumLength: %d NumberOfOwnDescriptors: %d OwnsDescriptors: %s" % ( self.Decode(0, 10, bitfield3), self.Decode(10, 10, bitfield3), self.Decode(21, 1, bitfield3))) p.Print(" - DictionaryMap: %s" % (self.Decode(20, 1, bitfield3))) p.Print(" - Deprecated: %s" % (self.Decode(23, 1, bitfield3))) p.Print(" - IsUnstable: %s" % (self.Decode(24, 1, bitfield3))) p.Print(" - NewTargetIsBase: %s" % (self.Decode(27, 1, bitfield3))) descriptors = self.ObjectField(self.DescriptorsOffset()) if descriptors.__class__ == FixedArray: DescriptorArray(descriptors).Print(p) else: p.Print(" - Descriptors: %s" % (descriptors)) transitions = self.ObjectField(self.TransitionsOrPrototypeInfoOffset()) if transitions.__class__ == FixedArray: TransitionArray(transitions).Print(p) else: p.Print(" - TransitionsOrPrototypeInfo: %s" % (transitions)) p.Print(" - Prototype: %s" % self.ObjectField(self.PrototypeOffset())) def __init__(self, heap, map, address): HeapObject.__init__(self, heap, map, address) self.instance_type = \ heap.reader.ReadU8(self.address + self.InstanceTypeOffset()) class String(HeapObject): def LengthOffset(self): # First word after the map is the hash, the second is the length. return self.heap.PointerSize() * 2 def __init__(self, heap, map, address): HeapObject.__init__(self, heap, map, address) self.length = self.SmiField(self.LengthOffset()) def GetChars(self): return "?string?" def Print(self, p): p.Print(str(self)) def __str__(self): return "\"%s\"" % self.GetChars() class SeqString(String): def CharsOffset(self): return self.heap.PointerSize() * 3 def __init__(self, heap, map, address): String.__init__(self, heap, map, address) self.chars = heap.reader.ReadBytes(self.address + self.CharsOffset(), self.length) def GetChars(self): return self.chars class ExternalString(String): # TODO(vegorov) fix ExternalString for X64 architecture 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): def LeftOffset(self): return self.heap.PointerSize() * 3 def RightOffset(self): return self.heap.PointerSize() * 4 def __init__(self, heap, map, address): String.__init__(self, heap, map, address) self.left = self.ObjectField(self.LeftOffset()) self.right = self.ObjectField(self.RightOffset()) def GetChars(self): try: return self.left.GetChars() + self.right.GetChars() except: return "***CAUGHT EXCEPTION IN GROKDUMP***" class Oddball(HeapObject): #Should match declarations in objects.h KINDS = [ "False", "True", "TheHole", "Null", "ArgumentMarker", "Undefined", "Other" ] def ToStringOffset(self): return self.heap.PointerSize() def ToNumberOffset(self): return self.ToStringOffset() + self.heap.PointerSize() def KindOffset(self): return self.ToNumberOffset() + self.heap.PointerSize() def __init__(self, heap, map, address): HeapObject.__init__(self, heap, map, address) self.to_string = self.ObjectField(self.ToStringOffset()) self.kind = self.SmiField(self.KindOffset()) def Print(self, p): p.Print(str(self)) def __str__(self): if self.to_string: return "Oddball(%08x, <%s>)" % (self.address, str(self.to_string)) else: kind = "???" if 0 <= self.kind < len(Oddball.KINDS): kind = Oddball.KINDS[self.kind] return "Oddball(%08x, kind=%s)" % (self.address, kind) class FixedArray(HeapObject): def LengthOffset(self): return self.heap.PointerSize() def ElementsOffset(self): return self.heap.PointerSize() * 2 def MemberOffset(self, i): return self.ElementsOffset() + self.heap.PointerSize() * i def Get(self, i): return self.ObjectField(self.MemberOffset(i)) def __init__(self, heap, map, address): HeapObject.__init__(self, heap, map, address) self.length = self.SmiField(self.LengthOffset()) def Print(self, p): p.Print("FixedArray(%s) {" % self.heap.reader.FormatIntPtr(self.address)) p.Indent() p.Print("length: %d" % self.length) base_offset = self.ElementsOffset() for i in xrange(self.length): offset = base_offset + 4 * i try: p.Print("[%08d] = %s" % (i, self.ObjectField(offset))) except TypeError: p.Dedent() p.Print("...") p.Print("}") return p.Dedent() p.Print("}") def __str__(self): return "FixedArray(%08x, length=%d)" % (self.address, self.length) class DescriptorArray(object): def __init__(self, array): self.array = array def Length(self): return self.array.Get(0) def Decode(self, offset, size, value): return (value >> offset) & ((1 << size) - 1) TYPES = [ "normal", "field", "function", "callbacks" ] def Type(self, value): return DescriptorArray.TYPES[self.Decode(0, 3, value)] def Attributes(self, value): attributes = self.Decode(3, 3, value) result = [] if (attributes & 0): result += ["ReadOnly"] if (attributes & 1): result += ["DontEnum"] if (attributes & 2): result += ["DontDelete"] return "[" + (",".join(result)) + "]" def Deleted(self, value): return self.Decode(6, 1, value) == 1 def FieldIndex(self, value): return self.Decode(20, 11, value) def Pointer(self, value): return self.Decode(6, 11, value) def Details(self, di, value): return ( di, self.Type(value), self.Attributes(value), self.FieldIndex(value), self.Pointer(value) ) def Print(self, p): length = self.Length() array = self.array p.Print("Descriptors(%08x, length=%d)" % (array.address, length)) p.Print("[et] %s" % (array.Get(1))) for di in xrange(length): i = 2 + di * 3 p.Print("0x%x" % (array.address + array.MemberOffset(i))) p.Print("[%i] name: %s" % (di, array.Get(i + 0))) p.Print("[%i] details: %s %s field-index %i pointer %i" % \ self.Details(di, array.Get(i + 1))) p.Print("[%i] value: %s" % (di, array.Get(i + 2))) end = self.array.length // 3 if length != end: p.Print("[%i-%i] slack descriptors" % (length, end)) class TransitionArray(object): def __init__(self, array): self.array = array def IsSimpleTransition(self): return self.array.length <= 2 def Length(self): # SimpleTransition cases if self.IsSimpleTransition(): return self.array.length - 1 return (self.array.length - 3) // 2 def Print(self, p): length = self.Length() array = self.array p.Print("Transitions(%08x, length=%d)" % (array.address, length)) p.Print("[backpointer] %s" % (array.Get(0))) if self.IsSimpleTransition(): if length == 1: p.Print("[simple target] %s" % (array.Get(1))) return elements = array.Get(1) if elements is not None: p.Print("[elements ] %s" % (elements)) prototype = array.Get(2) if prototype is not None: p.Print("[prototype ] %s" % (prototype)) for di in xrange(length): i = 3 + di * 2 p.Print("[%i] symbol: %s" % (di, array.Get(i + 0))) p.Print("[%i] target: %s" % (di, array.Get(i + 1))) class JSFunction(HeapObject): def CodeEntryOffset(self): return 3 * self.heap.PointerSize() def SharedOffset(self): return 5 * self.heap.PointerSize() def __init__(self, heap, map, address): HeapObject.__init__(self, heap, map, address) code_entry = \ heap.reader.ReadU32(self.address + self.CodeEntryOffset()) self.code = heap.FindObject(code_entry - Code.HeaderSize(heap) + 1) self.shared = self.ObjectField(self.SharedOffset()) def Print(self, p): source = "\n".join(" %s" % line for line in self._GetSource().split("\n")) p.Print("JSFunction(%s) {" % self.heap.reader.FormatIntPtr(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 not None and self.shared.Is(SharedFunctionInfo): inferred_name = self.shared.inferred_name return "JSFunction(%s, %s) " % \ (self.heap.reader.FormatIntPtr(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 if start and end: source = script_source.GetChars()[start:end] return source class SharedFunctionInfo(HeapObject): def CodeOffset(self): return 2 * self.heap.PointerSize() def ScriptOffset(self): return 7 * self.heap.PointerSize() def InferredNameOffset(self): return 9 * self.heap.PointerSize() def EndPositionOffset(self): return 12 * self.heap.PointerSize() + 4 * self.heap.IntSize() def StartPositionAndTypeOffset(self): return 12 * self.heap.PointerSize() + 5 * self.heap.IntSize() def __init__(self, heap, map, address): HeapObject.__init__(self, heap, map, address) self.code = self.ObjectField(self.CodeOffset()) self.script = self.ObjectField(self.ScriptOffset()) self.inferred_name = self.ObjectField(self.InferredNameOffset()) if heap.PointerSize() == 8: start_position_and_type = \ heap.reader.ReadU32(self.StartPositionAndTypeOffset()) self.start_position = start_position_and_type >> 2 pseudo_smi_end_position = \ heap.reader.ReadU32(self.EndPositionOffset()) self.end_position = pseudo_smi_end_position >> 2 else: start_position_and_type = \ self.SmiField(self.StartPositionAndTypeOffset()) if start_position_and_type: self.start_position = start_position_and_type >> 2 else: self.start_position = None self.end_position = \ self.SmiField(self.EndPositionOffset()) class Script(HeapObject): def SourceOffset(self): return self.heap.PointerSize() def NameOffset(self): return self.SourceOffset() + self.heap.PointerSize() def __init__(self, heap, map, address): HeapObject.__init__(self, heap, map, address) self.source = self.ObjectField(self.SourceOffset()) self.name = self.ObjectField(self.NameOffset()) class CodeCache(HeapObject): def DefaultCacheOffset(self): return self.heap.PointerSize() def NormalTypeCacheOffset(self): return self.DefaultCacheOffset() + self.heap.PointerSize() def __init__(self, heap, map, address): HeapObject.__init__(self, heap, map, address) self.default_cache = self.ObjectField(self.DefaultCacheOffset()) self.normal_type_cache = self.ObjectField(self.NormalTypeCacheOffset()) def Print(self, p): p.Print("CodeCache(%s) {" % self.heap.reader.FormatIntPtr(self.address)) p.Indent() p.Print("default cache: %s" % self.default_cache) p.Print("normal type cache: %s" % self.normal_type_cache) p.Dedent() p.Print("}") class Code(HeapObject): CODE_ALIGNMENT_MASK = (1 << 5) - 1 def InstructionSizeOffset(self): return self.heap.PointerSize() @staticmethod def HeaderSize(heap): return (heap.PointerSize() + heap.IntSize() + \ 4 * heap.PointerSize() + 3 * heap.IntSize() + \ Code.CODE_ALIGNMENT_MASK) & ~Code.CODE_ALIGNMENT_MASK def __init__(self, heap, map, address): HeapObject.__init__(self, heap, map, address) self.entry = self.address + Code.HeaderSize(heap) self.instruction_size = \ heap.reader.ReadU32(self.address + self.InstructionSizeOffset()) def Print(self, p): lines = self.heap.reader.GetDisasmLines(self.entry, self.instruction_size) p.Print("Code(%s) {" % self.heap.reader.FormatIntPtr(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, "ONE_BYTE_SYMBOL_TYPE": SeqString, "CONS_SYMBOL_TYPE": ConsString, "CONS_ONE_BYTE_SYMBOL_TYPE": ConsString, "EXTERNAL_SYMBOL_TYPE": ExternalString, "EXTERNAL_SYMBOL_WITH_ONE_BYTE_DATA_TYPE": ExternalString, "EXTERNAL_ONE_BYTE_SYMBOL_TYPE": ExternalString, "SHORT_EXTERNAL_SYMBOL_TYPE": ExternalString, "SHORT_EXTERNAL_SYMBOL_WITH_ONE_BYTE_DATA_TYPE": ExternalString, "SHORT_EXTERNAL_ONE_BYTE_SYMBOL_TYPE": ExternalString, "STRING_TYPE": SeqString, "ONE_BYTE_STRING_TYPE": SeqString, "CONS_STRING_TYPE": ConsString, "CONS_ONE_BYTE_STRING_TYPE": ConsString, "EXTERNAL_STRING_TYPE": ExternalString, "EXTERNAL_STRING_WITH_ONE_BYTE_DATA_TYPE": ExternalString, "EXTERNAL_ONE_BYTE_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_CACHE_TYPE": CodeCache, "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 self.IsSmi(tagged_address): return self.SmiUntag(tagged_address) return self.FindObject(tagged_address) def FindObject(self, tagged_address): if tagged_address in self.objects: return self.objects[tagged_address] if not self.IsTaggedObjectAddress(tagged_address): return None address = tagged_address - 1 if not self.reader.IsValidAddress(address): return None map_tagged_address = self.reader.ReadUIntPtr(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.FindMap(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 def FindMap(self, tagged_address): if (tagged_address & self.MapAlignmentMask()) != 1: return None address = tagged_address - 1 if not self.reader.IsValidAddress(address): return None object = Map(self, None, address) return object def IntSize(self): return 4 def PointerSize(self): return self.reader.PointerSize() def ObjectAlignmentMask(self): return self.PointerSize() - 1 def IsTaggedObjectAddress(self, address): return (address & self.ObjectAlignmentMask()) == 1 def MapAlignmentMask(self): if self.reader.arch == MD_CPU_ARCHITECTURE_AMD64: return (1 << 4) - 1 elif self.reader.arch == MD_CPU_ARCHITECTURE_ARM: return (1 << 4) - 1 elif self.reader.arch == MD_CPU_ARCHITECTURE_ARM64: return (1 << 4) - 1 elif self.reader.arch == MD_CPU_ARCHITECTURE_X86: return (1 << 5) - 1 def PageAlignmentMask(self): return (1 << 19) - 1 def IsTaggedAddress(self, address): return (address & 1) == 1 def IsSmi(self, tagged_address): if self.reader.Is64(): return (tagged_address & 0xFFFFFFFF) == 0 return not self.IsTaggedAddress(tagged_address) def SmiUntag(self, tagged_address): if self.reader.Is64(): return tagged_address >> 32 return tagged_address >> 1 def AddressTypeMarker(self, address): if not self.reader.IsValidAddress(address): return " " if self.reader.IsExceptionStackAddress(address): return "S" if self.reader.IsModuleAddress(address): return "C" if self.IsTaggedAddress(address): return "T" return "*" def RelativeOffset(self, slot, address): if not self.reader.IsValidAddress(slot): return None if not self.reader.IsAlignedAddress(slot): return None if not self.reader.IsValidAddress(address): return None if not self.reader.IsAlignedAddress(address): return None offset = (address - slot) / self.PointerSize() lower_limit = -32 upper_limit = 128 if self.reader.IsExceptionStackAddress(address): upper_limit = 0xFFFFFF if offset < lower_limit or upper_limit < offset: return None target_address = self.reader.ReadUIntPtr(address) return "[%+02d]=%s %s" % (offset, self.reader.FormatIntPtr(target_address), self.AddressTypeMarker(target_address)) class KnownObject(HeapObject): def __init__(self, heap, known_name): HeapObject.__init__(self, heap, None, None) self.known_name = known_name def __str__(self): return "<%s>" % self.known_name class KnownMap(HeapObject): def __init__(self, heap, known_name, instance_type): HeapObject.__init__(self, heap, None, None) self.instance_type = instance_type self.known_name = known_name def __str__(self): return "<%s>" % self.known_name COMMENT_RE = re.compile(r"^C (0x[0-9a-fA-F]+) (.*)$") PAGEADDRESS_RE = re.compile( r"^P (mappage|oldpage) (0x[0-9a-fA-F]+)$") class InspectionInfo(object): def __init__(self, minidump_name, reader): self.comment_file = minidump_name + ".comments" self.address_comments = {} self.page_address = {} if os.path.exists(self.comment_file): with open(self.comment_file, "r") as f: lines = f.readlines() f.close() for l in lines: m = COMMENT_RE.match(l) if m: self.address_comments[int(m.group(1), 0)] = m.group(2) m = PAGEADDRESS_RE.match(l) if m: self.page_address[m.group(1)] = int(m.group(2), 0) self.reader = reader self.styles = {} self.color_addresses() return def get_page_address(self, page_kind): return self.page_address.get(page_kind, 0) def save_page_address(self, page_kind, address): with open(self.comment_file, "a") as f: f.write("P %s 0x%x\n" % (page_kind, address)) f.close() def color_addresses(self): # Color all stack addresses. exception_thread = self.reader.thread_map[self.reader.exception.thread_id] stack_top = self.reader.ExceptionSP() stack_bottom = exception_thread.stack.start + \ exception_thread.stack.memory.data_size frame_pointer = self.reader.ExceptionFP() self.styles[frame_pointer] = "frame" for slot in xrange(stack_top, stack_bottom, self.reader.PointerSize()): # stack address self.styles[slot] = "sa" for slot in xrange(stack_top, stack_bottom, self.reader.PointerSize()): maybe_address = self.reader.ReadUIntPtr(slot) # stack value self.styles[maybe_address] = "sv" if slot == frame_pointer: self.styles[slot] = "frame" frame_pointer = maybe_address self.styles[self.reader.ExceptionIP()] = "pc" def get_style_class(self, address): return self.styles.get(address, None) def get_style_class_string(self, address): style = self.get_style_class(address) if style != None: return " class=%s " % style else: return "" def set_comment(self, address, comment): self.address_comments[address] = comment with open(self.comment_file, "a") as f: f.write("C 0x%x %s\n" % (address, comment)) f.close() def get_comment(self, address): return self.address_comments.get(address, "") class InspectionPadawan(object): """The padawan can improve annotations by sensing well-known objects.""" def __init__(self, reader, heap): self.reader = reader self.heap = heap self.known_first_map_page = 0 self.known_first_old_page = 0 def __getattr__(self, name): """An InspectionPadawan can be used instead of V8Heap, even though it does not inherit from V8Heap (aka. mixin).""" return getattr(self.heap, name) def GetPageOffset(self, tagged_address): return tagged_address & self.heap.PageAlignmentMask() def IsInKnownMapSpace(self, tagged_address): page_address = tagged_address & ~self.heap.PageAlignmentMask() return page_address == self.known_first_map_page def IsInKnownOldSpace(self, tagged_address): page_address = tagged_address & ~self.heap.PageAlignmentMask() return page_address == self.known_first_old_page def ContainingKnownOldSpaceName(self, tagged_address): page_address = tagged_address & ~self.heap.PageAlignmentMask() if page_address == self.known_first_old_page: return "OLD_SPACE" return None def FrameMarkerName(self, value): if 0 < value <= len(FRAME_MARKERS): return "Possible %s frame marker" % FRAME_MARKERS[value-1] return "" def FormatSmi(self, address, slot=None): value = self.heap.SmiUntag(address) marker = "" if slot and self.reader.IsExceptionStackAddress(slot): marker = self.FrameMarkerName(value) # On 32-bit systems almost everything looks like a Smi. if not self.reader.Is64() or value == 0: return marker return "Smi(%d) %s" % (value, marker) def SenseObject(self, address, slot=None): if self.heap.IsSmi(address): return self.FormatSmi(address, slot) if not self.heap.IsTaggedAddress(address): return None tagged_address = address if self.IsInKnownOldSpace(tagged_address): offset = self.GetPageOffset(tagged_address) lookup_key = (self.ContainingKnownOldSpaceName(tagged_address), offset) known_obj_name = KNOWN_OBJECTS.get(lookup_key) if known_obj_name: return KnownObject(self, known_obj_name) if self.IsInKnownMapSpace(tagged_address): known_map = self.SenseMap(tagged_address) if known_map: return known_map found_obj = self.heap.FindObject(tagged_address) if found_obj: return found_obj address = tagged_address - 1 if self.reader.IsValidAddress(address): map_tagged_address = self.reader.ReadUIntPtr(address) map = self.SenseMap(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) return cls(self, map, address) return None def SenseMap(self, tagged_address): if self.IsInKnownMapSpace(tagged_address): offset = self.GetPageOffset(tagged_address) known_map_info = KNOWN_MAPS.get(offset) if known_map_info: known_map_type, known_map_name = known_map_info return KnownMap(self, known_map_name, known_map_type) found_map = self.heap.FindMap(tagged_address) if found_map: return found_map return None def FindObjectOrSmi(self, tagged_address): """When used as a mixin in place of V8Heap.""" found_obj = self.SenseObject(tagged_address) if found_obj: return found_obj if self.IsSmi(tagged_address): return self.FormatSmi(tagged_address) else: return "Unknown(%s)" % self.reader.FormatIntPtr(tagged_address) def FindObject(self, tagged_address): """When used as a mixin in place of V8Heap.""" raise NotImplementedError def FindMap(self, tagged_address): """When used as a mixin in place of V8Heap.""" raise NotImplementedError def PrintKnowledge(self): print " known_first_map_page = %s\n"\ " known_first_old_page = %s" % ( self.reader.FormatIntPtr(self.known_first_map_page), self.reader.FormatIntPtr(self.known_first_old_page)) def TryInferFramePointer(self, slot, address): """ Assume we have a framepointer if we find 4 consecutive links """ for i in range(0, 4): if not self.reader.IsExceptionStackAddress(address): return 0 address = self.reader.ReadUIntPtr(address) return slot def InterpretMemory(self, start, end): # On 64 bit we omit frame pointers, so we have to do some more guesswork.A frame_pointer = 0 if not self.reader.Is64(): frame_pointer = self.reader.ExceptionFP() in_oom_dump_area = False for slot in xrange(start, end, self.reader.PointerSize()): if not self.reader.IsValidAddress(slot): print "%s: Address is not contained within the minidump!" % slot return maybe_address = self.reader.ReadUIntPtr(slot) address_info = [] heap_object = self.SenseObject(maybe_address, slot) if heap_object: address_info.append(heap_object) relative_offset = self.heap.RelativeOffset(slot, maybe_address) if relative_offset: address_info.append(relative_offset) maybe_address_contents = None if self.reader.IsExceptionStackAddress(maybe_address): maybe_address_contents = \ self.reader.ReadUIntPtr(maybe_address) & 0xFFFFFFFF if maybe_address_contents == 0xdecade00: in_oom_dump_area = True if frame_pointer == 0: frame_pointer = self.TryInferFramePointer(slot, maybe_address) maybe_symbol = self.reader.FindSymbol(maybe_address) if in_oom_dump_area: if maybe_address_contents == 0xdecade00: address_info = ["<==== HeapStats start marker"] elif maybe_address_contents == 0xdecade01: address_info = ["<==== HeapStats end marker"] elif maybe_address_contents is not None: address_info = [" %d (%d Mbytes)" % (maybe_address_contents, maybe_address_contents >> 20)] if slot == frame_pointer: if not self.reader.IsExceptionStackAddress(maybe_address): address_info.append("<==== BAD frame pointer") frame_pointer = 0 else: address_info.append("<==== Frame pointer") frame_pointer = maybe_address address_type_marker = self.heap.AddressTypeMarker(maybe_address) string_value = self.reader.ReadAsciiPtr(slot) print "%s: %s %s %s %s" % (self.reader.FormatIntPtr(slot), self.reader.FormatIntPtr(maybe_address), address_type_marker, string_value, ' | '.join(address_info)) if maybe_address_contents == 0xdecade01: in_oom_dump_area = False heap_object = self.heap.FindObject(maybe_address) if heap_object: heap_object.Print(Printer()) print "" WEB_HEADER = """ Dump %(dump_name)s
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""" WEB_FOOTER = """ """ class WebParameterError(Exception): def __init__(self, message): Exception.__init__(self, message) class InspectionWebHandler(BaseHTTPServer.BaseHTTPRequestHandler): def formatter(self, query_components): name = query_components.get("dump", [None])[0] return self.server.get_dump_formatter(name) def send_success_html_headers(self): self.send_response(200) self.send_header("Cache-Control", "no-cache, no-store, must-revalidate") self.send_header("Pragma", "no-cache") self.send_header("Expires", "0") self.send_header('Content-type','text/html') self.end_headers() return def do_GET(self): try: parsedurl = urlparse.urlparse(self.path) query_components = urlparse.parse_qs(parsedurl.query) if parsedurl.path == "/dumps.html": self.send_success_html_headers() out_buffer = StringIO.StringIO() self.server.output_dumps(out_buffer) self.wfile.write(out_buffer.getvalue()) elif parsedurl.path == "/summary.html": self.send_success_html_headers() out_buffer = StringIO.StringIO() self.formatter(query_components).output_summary(out_buffer) self.wfile.write(out_buffer.getvalue()) elif parsedurl.path == "/info.html": self.send_success_html_headers() out_buffer = StringIO.StringIO() self.formatter(query_components).output_info(out_buffer) self.wfile.write(out_buffer.getvalue()) elif parsedurl.path == "/modules.html": self.send_success_html_headers() out_buffer = StringIO.StringIO() self.formatter(query_components).output_modules(out_buffer) self.wfile.write(out_buffer.getvalue()) elif parsedurl.path == "/search.html" or parsedurl.path == "/s": address = query_components.get("val", []) if len(address) != 1: self.send_error(404, "Invalid params") return self.send_success_html_headers() out_buffer = StringIO.StringIO() self.formatter(query_components).output_search_res( out_buffer, address[0]) self.wfile.write(out_buffer.getvalue()) elif parsedurl.path == "/disasm.html": address = query_components.get("val", []) exact = query_components.get("exact", ["on"]) if len(address) != 1: self.send_error(404, "Invalid params") return self.send_success_html_headers() out_buffer = StringIO.StringIO() self.formatter(query_components).output_disasm( out_buffer, address[0], exact[0]) self.wfile.write(out_buffer.getvalue()) elif parsedurl.path == "/data.html": address = query_components.get("val", []) datakind = query_components.get("type", ["address"]) if len(address) == 1 and len(datakind) == 1: self.send_success_html_headers() out_buffer = StringIO.StringIO() self.formatter(query_components).output_data( out_buffer, address[0], datakind[0]) self.wfile.write(out_buffer.getvalue()) else: self.send_error(404,'Invalid params') elif parsedurl.path == "/setdumpdesc": name = query_components.get("dump", [""]) description = query_components.get("description", [""]) if len(name) == 1 and len(description) == 1: name = name[0] description = description[0] if self.server.set_dump_desc(name, description): self.send_success_html_headers() self.wfile.write("OK") return self.send_error(404,'Invalid params') elif parsedurl.path == "/setcomment": address = query_components.get("address", []) comment = query_components.get("comment", [""]) if len(address) == 1 and len(comment) == 1: address = address[0] comment = comment[0] self.formatter(query_components).set_comment(address, comment) self.send_success_html_headers() self.wfile.write("OK") else: self.send_error(404,'Invalid params') elif parsedurl.path == "/setpageaddress": kind = query_components.get("kind", []) address = query_components.get("address", [""]) if len(kind) == 1 and len(address) == 1: kind = kind[0] address = address[0] self.formatter(query_components).set_page_address(kind, address) self.send_success_html_headers() self.wfile.write("OK") else: self.send_error(404,'Invalid params') else: self.send_error(404,'File Not Found: %s' % self.path) except IOError: self.send_error(404,'File Not Found: %s' % self.path) except WebParameterError as e: self.send_error(404, 'Web parameter error: %s' % e.message) HTML_REG_FORMAT = "%s: %s
\n" class InspectionWebFormatter(object): CONTEXT_FULL = 0 CONTEXT_SHORT = 1 def __init__(self, switches, minidump_name, http_server): self.dumpfilename = os.path.split(minidump_name)[1] self.encfilename = urllib.urlencode({ 'dump' : self.dumpfilename }) self.reader = MinidumpReader(switches, minidump_name) self.server = http_server # Set up the heap exception_thread = self.reader.thread_map[self.reader.exception.thread_id] stack_top = self.reader.ExceptionSP() stack_bottom = exception_thread.stack.start + \ exception_thread.stack.memory.data_size stack_map = {self.reader.ExceptionIP(): -1} for slot in xrange(stack_top, stack_bottom, self.reader.PointerSize()): maybe_address = self.reader.ReadUIntPtr(slot) if not maybe_address in stack_map: stack_map[maybe_address] = slot self.heap = V8Heap(self.reader, stack_map) self.padawan = InspectionPadawan(self.reader, self.heap) self.comments = InspectionInfo(minidump_name, self.reader) self.padawan.known_first_old_page = ( self.comments.get_page_address("oldpage")) self.padawan.known_first_map_page = ( self.comments.get_page_address("mappage")) def set_comment(self, straddress, comment): try: address = int(straddress, 0) self.comments.set_comment(address, comment) except ValueError: print "Invalid address" def set_page_address(self, kind, straddress): try: address = int(straddress, 0) if kind == "oldpage": self.padawan.known_first_old_page = address elif kind == "mappage": self.padawan.known_first_map_page = address self.comments.save_page_address(kind, address) except ValueError: print "Invalid address" def td_from_address(self, f, address): f.write("" % self.comments.get_style_class_string(address)) def format_address(self, maybeaddress, straddress = None): if maybeaddress is None: return "not in dump" else: if straddress is None: straddress = "0x" + self.reader.FormatIntPtr(maybeaddress) style_class = "" if not self.reader.IsValidAddress(maybeaddress): style_class = "class=nd" return ("%s" % (style_class, self.encfilename, straddress, straddress)) def output_header(self, f): f.write(WEB_HEADER % { "query_dump" : self.encfilename, "dump_name" : cgi.escape(self.dumpfilename) }) def output_footer(self, f): f.write(WEB_FOOTER) MAX_CONTEXT_STACK = 2048 def output_summary(self, f): self.output_header(f) f.write('
') self.output_context(f, InspectionWebFormatter.CONTEXT_SHORT) self.output_disasm_pc(f) # Output stack exception_thread = self.reader.thread_map[self.reader.exception.thread_id] stack_top = self.reader.ExceptionSP() stack_bottom = min(exception_thread.stack.start + \ exception_thread.stack.memory.data_size, stack_top + self.MAX_CONTEXT_STACK) self.output_words(f, stack_top - 16, stack_bottom, stack_top, "Stack") f.write('
') self.output_footer(f) return def output_info(self, f): self.output_header(f) f.write("

Dump info

") f.write("Description: ") self.server.output_dump_desc_field(f, self.dumpfilename) f.write("
") f.write("Filename: ") f.write("%s
" % (self.dumpfilename)) dt = datetime.datetime.fromtimestamp(self.reader.header.time_date_stampt) f.write("Timestamp: %s
" % dt.strftime('%Y-%m-%d %H:%M:%S')) self.output_context(f, InspectionWebFormatter.CONTEXT_FULL) self.output_address_ranges(f) self.output_footer(f) return def output_address_ranges(self, f): regions = {} def print_region(_reader, start, size, _location): regions[start] = size self.reader.ForEachMemoryRegion(print_region) f.write("

Available memory regions

") f.write('
') f.write("") f.write("") f.write("") f.write("") f.write("") f.write("") for start in sorted(regions): size = regions[start] f.write("") f.write("" % self.format_address(start)) f.write("" % self.format_address(start + size)) f.write("" % size) f.write("") f.write("
Start addressEnd addressNumber of bytes
%s %s %d
") f.write('
') return def output_module_details(self, f, module): f.write("%s" % GetModuleName(self.reader, module)) file_version = GetVersionString(module.version_info.dwFileVersionMS, module.version_info.dwFileVersionLS) product_version = GetVersionString(module.version_info.dwProductVersionMS, module.version_info.dwProductVersionLS) f.write("
  ") f.write("base: %s" % self.reader.FormatIntPtr(module.base_of_image)) f.write("
  ") f.write(" end: %s" % self.reader.FormatIntPtr(module.base_of_image + module.size_of_image)) f.write("
  ") f.write(" file version: %s" % file_version) f.write("
  ") f.write(" product version: %s" % product_version) f.write("
  ") time_date_stamp = datetime.datetime.fromtimestamp(module.time_date_stamp) f.write(" timestamp: %s" % time_date_stamp) f.write("
"); def output_modules(self, f): self.output_header(f) f.write('
') for module in self.reader.module_list.modules: self.output_module_details(f, module) f.write("
") self.output_footer(f) return def output_context(self, f, details): exception_thread = self.reader.thread_map[self.reader.exception.thread_id] f.write("

Exception context

") f.write('
') f.write("Thread id: %d" % exception_thread.id) f.write("   Exception code: %08X
" % self.reader.exception.exception.code) if details == InspectionWebFormatter.CONTEXT_FULL: if self.reader.exception.exception.parameter_count > 0: f.write("   Exception parameters: ") for i in xrange(0, self.reader.exception.exception.parameter_count): f.write("%08x" % self.reader.exception.exception.information[i]) f.write("

") for r in CONTEXT_FOR_ARCH[self.reader.arch]: f.write(HTML_REG_FORMAT % (r, self.format_address(self.reader.Register(r)))) # TODO(vitalyr): decode eflags. if self.reader.arch in [MD_CPU_ARCHITECTURE_ARM, MD_CPU_ARCHITECTURE_ARM64]: f.write("cpsr: %s" % bin(self.reader.exception_context.cpsr)[2:]) else: f.write("eflags: %s" % bin(self.reader.exception_context.eflags)[2:]) f.write('
') return def align_down(self, a, size): alignment_correction = a % size return a - alignment_correction def align_up(self, a, size): alignment_correction = (size - 1) - ((a + size - 1) % size) return a + alignment_correction def format_object(self, address): heap_object = self.padawan.SenseObject(address) return cgi.escape(str(heap_object or "")) def output_data(self, f, straddress, datakind): try: self.output_header(f) address = int(straddress, 0) if not self.reader.IsValidAddress(address): f.write("

Address 0x%x not found in the dump.

" % address) return region = self.reader.FindRegion(address) if datakind == "address": self.output_words(f, region[0], region[0] + region[1], address, "Dump") elif datakind == "ascii": self.output_ascii(f, region[0], region[0] + region[1], address) self.output_footer(f) except ValueError: f.write("

Unrecognized address format \"%s\".

" % straddress) return def output_words(self, f, start_address, end_address, highlight_address, desc): region = self.reader.FindRegion(highlight_address) if region is None: f.write("

Address 0x%x not found in the dump.

" % (highlight_address)) return size = self.heap.PointerSize() start_address = self.align_down(start_address, size) low = self.align_down(region[0], size) high = self.align_up(region[0] + region[1], size) if start_address < low: start_address = low end_address = self.align_up(end_address, size) if end_address > high: end_address = high expand = "" if start_address != low or end_address != high: expand = ("(" " more..." " )" % (self.encfilename, highlight_address)) f.write("

%s 0x%x - 0x%x, " "highlighting 0x%x %s

" % (desc, start_address, end_address, highlight_address, expand)) f.write('
') f.write("") for j in xrange(0, end_address - start_address, size): slot = start_address + j heap_object = "" maybe_address = None end_region = region[0] + region[1] if slot < region[0] or slot + size > end_region: straddress = "0x" for i in xrange(end_region, slot + size): straddress += "??" for i in reversed( xrange(max(slot, region[0]), min(slot + size, end_region))): straddress += "%02x" % self.reader.ReadU8(i) for i in xrange(slot, region[0]): straddress += "??" else: maybe_address = self.reader.ReadUIntPtr(slot) straddress = self.format_address(maybe_address) if maybe_address: heap_object = self.format_object(maybe_address) address_fmt = "%s " if slot == highlight_address: f.write("") address_fmt = "%s " elif slot < highlight_address and highlight_address < slot + size: f.write("") address_fmt = "%s " else: f.write("") f.write("") self.td_from_address(f, slot) f.write(address_fmt % self.format_address(slot)) self.td_from_address(f, maybe_address) f.write(": %s " % straddress) f.write("") f.write("" % (heap_object or '')) f.write("") f.write("
") self.output_comment_box(f, "da-", slot) f.write("") if maybe_address != None: self.output_comment_box( f, "sv-" + self.reader.FormatIntPtr(slot), maybe_address) f.write("%s
") f.write("
") return def output_ascii(self, f, start_address, end_address, highlight_address): region = self.reader.FindRegion(highlight_address) if region is None: f.write("

Address %x not found in the dump.

" % highlight_address) return if start_address < region[0]: start_address = region[0] if end_address > region[0] + region[1]: end_address = region[0] + region[1] expand = "" if start_address != region[0] or end_address != region[0] + region[1]: link = ("data.html?%s&val=0x%x&type=ascii#highlight" % (self.encfilename, highlight_address)) expand = "(more...)" % link f.write("

ASCII dump 0x%x - 0x%x, highlighting 0x%x %s

" % (start_address, end_address, highlight_address, expand)) line_width = 64 f.write('
') start = self.align_down(start_address, line_width) for i in xrange(end_address - start): address = start + i if address % 64 == 0: if address != start: f.write("
") f.write("0x%08x: " % address) if address < start_address: f.write(" ") else: if address == highlight_address: f.write("") code = self.reader.ReadU8(address) if code < 127 and code >= 32: f.write("&#") f.write(str(code)) f.write(";") else: f.write("·") if address == highlight_address: f.write("") f.write("
") return def output_disasm(self, f, straddress, strexact): try: self.output_header(f) address = int(straddress, 0) if not self.reader.IsValidAddress(address): f.write("

Address 0x%x not found in the dump.

" % address) return region = self.reader.FindRegion(address) self.output_disasm_range( f, region[0], region[0] + region[1], address, strexact == "on") self.output_footer(f) except ValueError: f.write("

Unrecognized address format \"%s\".

" % straddress) return def output_disasm_range( self, f, start_address, end_address, highlight_address, exact): region = self.reader.FindRegion(highlight_address) if start_address < region[0]: start_address = region[0] if end_address > region[0] + region[1]: end_address = region[0] + region[1] count = end_address - start_address lines = self.reader.GetDisasmLines(start_address, count) found = False if exact: for line in lines: if line[0] + start_address == highlight_address: found = True break if not found: start_address = highlight_address count = end_address - start_address lines = self.reader.GetDisasmLines(highlight_address, count) expand = "" if start_address != region[0] or end_address != region[0] + region[1]: exactness = "" if exact and not found and end_address == region[0] + region[1]: exactness = "&exact=off" expand = ("(more...)" % (self.encfilename, exactness, highlight_address)) f.write("

Disassembling 0x%x - 0x%x, highlighting 0x%x %s

" % (start_address, end_address, highlight_address, expand)) f.write('
') f.write(""); for i in xrange(len(lines)): line = lines[i] next_address = count if i + 1 < len(lines): next_line = lines[i + 1] next_address = next_line[0] self.format_disasm_line( f, start_address, line, next_address, highlight_address) f.write("
") f.write("
") return def annotate_disasm_addresses(self, line): extra = [] for m in ADDRESS_RE.finditer(line): maybe_address = int(m.group(0), 16) formatted_address = self.format_address(maybe_address, m.group(0)) line = line.replace(m.group(0), formatted_address) object_info = self.padawan.SenseObject(maybe_address) if not object_info: continue extra.append(cgi.escape(str(object_info))) if len(extra) == 0: return line return ("%s ;; %s" % (line, ", ".join(extra))) def format_disasm_line( self, f, start, line, next_address, highlight_address): line_address = start + line[0] address_fmt = " %s" if line_address == highlight_address: f.write("") address_fmt = " %s" elif (line_address < highlight_address and highlight_address < next_address + start): f.write("") address_fmt = " %s" else: f.write("") num_bytes = next_address - line[0] stack_slot = self.heap.stack_map.get(line_address) marker = "" if stack_slot: marker = "=>" op_offset = 3 * num_bytes - 1 code = line[1] # Compute the actual call target which the disassembler is too stupid # to figure out (it adds the call offset to the disassembly offset rather # than the absolute instruction address). if self.heap.reader.arch == MD_CPU_ARCHITECTURE_X86: if code.startswith("e8"): words = code.split() if len(words) > 6 and words[5] == "call": offset = int(words[4] + words[3] + words[2] + words[1], 16) target = (line_address + offset + 5) & 0xFFFFFFFF code = code.replace(words[6], "0x%08x" % target) # TODO(jkummerow): port this hack to ARM and x64. opcodes = code[:op_offset] code = self.annotate_disasm_addresses(code[op_offset:]) f.write(" ") self.output_comment_box(f, "codel-", line_address) f.write("") f.write(address_fmt % marker) f.write(" ") self.td_from_address(f, line_address) f.write(self.format_address(line_address)) f.write(" (+0x%x)" % line[0]) f.write(": %s " % opcodes) f.write("%s" % code) f.write("") def output_comment_box(self, f, prefix, address): comment = self.comments.get_comment(address) value = "" if comment: value = " value=\"%s\"" % cgi.escape(comment) f.write("" % (prefix, self.reader.FormatIntPtr(address), value)) MAX_FOUND_RESULTS = 100 def output_find_results(self, f, results): f.write("Addresses") toomany = len(results) > self.MAX_FOUND_RESULTS if toomany: f.write("(found %i results, displaying only first %i)" % (len(results), self.MAX_FOUND_RESULTS)) f.write(": ") results = sorted(results) results = results[:min(len(results), self.MAX_FOUND_RESULTS)] for address in results: f.write("%s" % (self.comments.get_style_class_string(address), self.format_address(address))) if toomany: f.write("...") def output_page_info(self, f, page_kind, page_address, my_page_address): if my_page_address == page_address and page_address != 0: f.write("Marked first %s page." % page_kind) else: f.write("" % page_kind) f.write("Marked first %s page." % page_kind) f.write("\n") f.write("" % page_kind) return def output_search_res(self, f, straddress): try: self.output_header(f) f.write("

Search results for %s

" % straddress) address = int(straddress, 0) f.write("Comment: ") self.output_comment_box(f, "search-", address) f.write("
") page_address = address & ~self.heap.PageAlignmentMask() f.write("Page info: ") self.output_page_info(f, "old", self.padawan.known_first_old_page, \ page_address) self.output_page_info(f, "map", self.padawan.known_first_map_page, \ page_address) if not self.reader.IsValidAddress(address): f.write("

The contents at address %s not found in the dump.

" % \ straddress) else: # Print as words self.output_words(f, address - 8, address + 32, address, "Dump") # Print as ASCII f.write("
") self.output_ascii(f, address, address + 256, address) # Print as code f.write("
") self.output_disasm_range(f, address - 16, address + 16, address, True) aligned_res, unaligned_res = self.reader.FindWordList(address) if len(aligned_res) > 0: f.write("

Occurrences of 0x%x at aligned addresses

" % address) self.output_find_results(f, aligned_res) if len(unaligned_res) > 0: f.write("

Occurrences of 0x%x at unaligned addresses

" % \ address) self.output_find_results(f, unaligned_res) if len(aligned_res) + len(unaligned_res) == 0: f.write("

No occurences of 0x%x found in the dump

" % address) self.output_footer(f) except ValueError: f.write("

Unrecognized address format \"%s\".

" % straddress) return def output_disasm_pc(self, f): address = self.reader.ExceptionIP() if not self.reader.IsValidAddress(address): return self.output_disasm_range(f, address - 16, address + 16, address, True) WEB_DUMPS_HEADER = """ Dump list """ WEB_DUMPS_FOOTER = """ """ DUMP_FILE_RE = re.compile(r"[-_0-9a-zA-Z][-\._0-9a-zA-Z]*\.dmp$") class InspectionWebServer(BaseHTTPServer.HTTPServer): def __init__(self, port_number, switches, minidump_name): BaseHTTPServer.HTTPServer.__init__( self, ('', port_number), InspectionWebHandler) splitpath = os.path.split(minidump_name) self.dumppath = splitpath[0] self.dumpfilename = splitpath[1] self.default_formatter = InspectionWebFormatter( switches, minidump_name, self) self.formatters = { self.dumpfilename : self.default_formatter } self.switches = switches def output_dump_desc_field(self, f, name): try: descfile = open(os.path.join(self.dumppath, name + ".desc"), "r") desc = descfile.readline() descfile.close() except IOError: desc = "" f.write("\n" % (cgi.escape(name), desc)) def set_dump_desc(self, name, description): if not DUMP_FILE_RE.match(name): return False fname = os.path.join(self.dumppath, name) if not os.path.isfile(fname): return False fname = fname + ".desc" descfile = open(fname, "w") descfile.write(description) descfile.close() return True def get_dump_formatter(self, name): if name is None: return self.default_formatter else: if not DUMP_FILE_RE.match(name): raise WebParameterError("Invalid name '%s'" % name) formatter = self.formatters.get(name, None) if formatter is None: try: formatter = InspectionWebFormatter( self.switches, os.path.join(self.dumppath, name), self) self.formatters[name] = formatter except IOError: raise WebParameterError("Could not open dump '%s'" % name) return formatter def output_dumps(self, f): f.write(WEB_DUMPS_HEADER) f.write("

List of available dumps

") f.write("\n") f.write("") f.write("") f.write("") f.write("") f.write("") dumps_by_time = {} for fname in os.listdir(self.dumppath): if DUMP_FILE_RE.match(fname): mtime = os.stat(os.path.join(self.dumppath, fname)).st_mtime fnames = dumps_by_time.get(mtime, []) fnames.append(fname) dumps_by_time[mtime] = fnames for mtime in sorted(dumps_by_time, reverse=True): fnames = dumps_by_time[mtime] for fname in fnames: f.write("\n") f.write("\n" % ( (urllib.urlencode({ 'dump' : fname }), fname))) f.write("") f.write("") f.write("\n") f.write("
NameFile timeComment
%s   ") f.write(datetime.datetime.fromtimestamp(mtime)) f.write("   ") self.output_dump_desc_field(f, fname) f.write("
\n") f.write(WEB_DUMPS_FOOTER) return class InspectionShell(cmd.Cmd): def __init__(self, reader, heap): cmd.Cmd.__init__(self) self.reader = reader self.heap = heap self.padawan = InspectionPadawan(reader, heap) self.prompt = "(grok) " def do_da(self, address): """ Print ASCII string starting at specified address. """ address = int(address, 16) string = "" while self.reader.IsValidAddress(address): code = self.reader.ReadU8(address) if code < 128: string += chr(code) else: break address += 1 if string == "": print "Not an ASCII string at %s" % self.reader.FormatIntPtr(address) else: print "%s\n" % string def ParseAddressExpr(self, expr): """ Support parsing simple expressions of the form: (ADDR|$REGISTER)[+|-ADDR] """ address = 0; expr = expr.split("+") sign = 1 if len(expr) == 1: expr = expr[0].split("-") sign = -1 maybe_addr = expr[0] if maybe_addr[0] == "$": try: # Referring to a register address = self.reader.Register(maybe_addr[1:]) except: print("**** Register %s does not exist." % maybe_addr) return 0 else: try: address = int(maybe_addr, 16) except: print("**** Invalid address: %s" % maybe_addr) return 0 if len(expr) > 1: try: address += sign * int(expr[1], 16) except: print("*** Invalid offset: %s" % expr[1]) return 0 return address def do_dd(self, args): """ Interpret memory in the given region [address, address + num * word_size) (if available) as a sequence of words. Automatic alignment is not performed. If the num is not specified, a default value of 16 words is usif not self.Is If no address is given, dd continues printing at the next word. Synopsis: dd 0x
|$register [0x] """ if len(args) != 0: args = args.split(' ') self.dd_start = self.ParseAddressExpr(args[0]) self.dd_num = int(args[1], 16) if len(args) > 1 else 0x10 else: self.dd_start += self.dd_num * self.reader.PointerSize() if not self.reader.IsAlignedAddress(self.dd_start): print "Warning: Dumping un-aligned memory, is this what you had in mind?" end = self.dd_start + self.reader.PointerSize() * self.dd_num self.padawan.InterpretMemory(self.dd_start, end) def do_do(self, address): """ Interpret memory at the given address as a V8 object. Automatic alignment makes sure that you can pass tagged as well as un-tagged addresses. """ address = self.ParseAddressExpr(address) if self.reader.IsAlignedAddress(address): address = address + 1 elif not self.IsTaggedObjectAddress(address): print "Address doesn't look like a valid pointer!" return heap_object = self.padawan.SenseObject(address) if heap_object: heap_object.Print(Printer()) else: print "Address cannot be interpreted as object!" def do_do_desc(self, address): """ Print a descriptor array in a readable format. """ start = self.ParseAddressExpr(address) if ((start & 1) == 1): start = start - 1 DescriptorArray(FixedArray(self.heap, None, start)).Print(Printer()) def do_do_map(self, address): """ Print a descriptor array in a readable format. """ start = self.ParseAddressExpr(address) if ((start & 1) == 1): start = start - 1 Map(self.heap, None, start).Print(Printer()) def do_do_trans(self, address): """ Print a transition array in a readable format. """ start = self.ParseAddressExpr(address) if ((start & 1) == 1): start = start - 1 TransitionArray(FixedArray(self.heap, None, start)).Print(Printer()) def do_dp(self, address): """ Interpret memory at the given address as being on a V8 heap page and print information about the page header (if available). """ address = self.ParseAddressExpr(address) page_address = address & ~self.heap.PageAlignmentMask() if self.reader.IsValidAddress(page_address): raise NotImplementedError else: print "Page header is not available!" def do_k(self, arguments): """ Teach V8 heap layout information to the inspector. This increases the amount of annotations the inspector can produce while dumping data. The first page of each heap space is of particular interest because it contains known objects that do not move. """ self.padawan.PrintKnowledge() def do_ko(self, address): """ Teach V8 heap layout information to the inspector. Set the first old space page by passing any pointer into that page. """ address = self.ParseAddressExpr(address) page_address = address & ~self.heap.PageAlignmentMask() self.padawan.known_first_old_page = page_address def do_km(self, address): """ Teach V8 heap layout information to the inspector. Set the first map-space page by passing any pointer into that page. """ address = self.ParseAddressExpr(address) page_address = address & ~self.heap.PageAlignmentMask() self.padawan.known_first_map_page = page_address def do_list(self, smth): """ List all available memory regions. """ def print_region(reader, start, size, location): print " %s - %s (%d bytes)" % (reader.FormatIntPtr(start), reader.FormatIntPtr(start + size), size) print "Available memory regions:" self.reader.ForEachMemoryRegion(print_region) def do_lm(self, arg): """ List details for all loaded modules in the minidump. An argument can be passed to limit the output to only those modules that contain the argument as a substring (case insensitive match). """ for module in self.reader.module_list.modules: if arg: name = GetModuleName(self.reader, module).lower() if name.find(arg.lower()) >= 0: PrintModuleDetails(self.reader, module) else: PrintModuleDetails(self.reader, module) print def do_s(self, word): """ Search for a given word in available memory regions. The given word is expanded to full pointer size and searched at aligned as well as un-aligned memory locations. Use 'sa' to search aligned locations only. """ try: word = int(word, 0) except ValueError: print "Malformed word, prefix with '0x' to use hexadecimal format." return print "Searching for word %d/0x%s:" % (word, self.reader.FormatIntPtr(word)) self.reader.FindWord(word) def do_sh(self, none): """ Search for the V8 Heap object in all available memory regions. You might get lucky and find this rare treasure full of invaluable information. """ raise NotImplementedError def do_u(self, args): """ Unassemble memory in the region [address, address + size). If the size is not specified, a default value of 32 bytes is used. Synopsis: u 0x
0x """ args = args.split(' ') start = self.ParseAddressExpr(args[0]) size = self.ParseAddressExpr(args[1]) if len(args) > 1 else 0x20 if not self.reader.IsValidAddress(start): print "Address is not contained within the minidump!" return lines = self.reader.GetDisasmLines(start, size) for line in lines: print FormatDisasmLine(start, self.heap, line) print def do_EOF(self, none): raise KeyboardInterrupt EIP_PROXIMITY = 64 CONTEXT_FOR_ARCH = { MD_CPU_ARCHITECTURE_AMD64: ['rax', 'rbx', 'rcx', 'rdx', 'rdi', 'rsi', 'rbp', 'rsp', 'rip', 'r8', 'r9', 'r10', 'r11', 'r12', 'r13', 'r14', 'r15'], MD_CPU_ARCHITECTURE_ARM: ['r0', 'r1', 'r2', 'r3', 'r4', 'r5', 'r6', 'r7', 'r8', 'r9', 'r10', 'r11', 'r12', 'sp', 'lr', 'pc'], MD_CPU_ARCHITECTURE_ARM64: ['r0', 'r1', 'r2', 'r3', 'r4', 'r5', 'r6', 'r7', 'r8', 'r9', 'r10', 'r11', 'r12', 'r13', 'r14', 'r15', 'r16', 'r17', 'r18', 'r19', 'r20', 'r21', 'r22', 'r23', 'r24', 'r25', 'r26', 'r27', 'r28', 'fp', 'lr', 'sp', 'pc'], MD_CPU_ARCHITECTURE_X86: ['eax', 'ebx', 'ecx', 'edx', 'edi', 'esi', 'ebp', 'esp', 'eip'] } KNOWN_MODULES = {'chrome.exe', 'chrome.dll'} def GetVersionString(ms, ls): return "%d.%d.%d.%d" % (ms >> 16, ms & 0xffff, ls >> 16, ls & 0xffff) def GetModuleName(reader, module): name = reader.ReadMinidumpString(module.module_name_rva) # simplify for path manipulation name = name.encode('utf-8') return str(os.path.basename(str(name).replace("\\", "/"))) def PrintModuleDetails(reader, module): print "%s" % GetModuleName(reader, module) file_version = GetVersionString(module.version_info.dwFileVersionMS, module.version_info.dwFileVersionLS) product_version = GetVersionString(module.version_info.dwProductVersionMS, module.version_info.dwProductVersionLS) print " base: %s" % reader.FormatIntPtr(module.base_of_image) print " end: %s" % reader.FormatIntPtr(module.base_of_image + module.size_of_image) print " file version: %s" % file_version print " product version: %s" % product_version time_date_stamp = datetime.datetime.fromtimestamp(module.time_date_stamp) print " timestamp: %s" % time_date_stamp def AnalyzeMinidump(options, minidump_name): reader = MinidumpReader(options, minidump_name) heap = None stack_top = reader.ExceptionSP() stack_bottom = reader.StackBottom() stack_map = {reader.ExceptionIP(): -1} for slot in xrange(stack_top, stack_bottom, reader.PointerSize()): maybe_address = reader.ReadUIntPtr(slot) if not maybe_address in stack_map: stack_map[maybe_address] = slot heap = V8Heap(reader, stack_map) DebugPrint("========================================") if reader.exception is None: print "Minidump has no exception info" else: print "Address markers:" print " T = valid tagged pointer in the minidump" print " S = address on the exception stack" print " C = address in loaded C/C++ module" print " * = address in the minidump" print "Exception info:" exception_thread = reader.ExceptionThread() print " thread id: %d" % exception_thread.id print " code: %08X" % reader.exception.exception.code print " context:" context = CONTEXT_FOR_ARCH[reader.arch] maxWidth = max(map(lambda s: len(s), context)) for r in context: register_value = reader.Register(r) print " %s: %s %s" % (r.rjust(maxWidth), reader.FormatIntPtr(register_value ), heap.AddressTypeMarker(register_value)) # TODO(vitalyr): decode eflags. if reader.arch in [MD_CPU_ARCHITECTURE_ARM, MD_CPU_ARCHITECTURE_ARM64]: print " cpsr: %s" % bin(reader.exception_context.cpsr)[2:] else: print " eflags: %s" % bin(reader.exception_context.eflags)[2:] print print " modules:" for module in reader.module_list.modules: name = GetModuleName(reader, module) if name in KNOWN_MODULES: print " %s at %08X" % (name, module.base_of_image) reader.TryLoadSymbolsFor(name, module) print print "Disassembly around exception.eip:" eip_symbol = reader.FindSymbol(reader.ExceptionIP()) if eip_symbol is not None: print eip_symbol disasm_start = reader.ExceptionIP() - EIP_PROXIMITY disasm_bytes = 2 * EIP_PROXIMITY if (options.full): full_range = reader.FindRegion(reader.ExceptionIP()) if full_range is not None: disasm_start = full_range[0] disasm_bytes = full_range[1] lines = reader.GetDisasmLines(disasm_start, disasm_bytes) if not lines: print "Could not disassemble using %s." % OBJDUMP_BIN print "Pass path to architecture specific objdump via --objdump?" for line in lines: print FormatDisasmLine(disasm_start, heap, line) print if heap is None: heap = V8Heap(reader, None) if options.full: FullDump(reader, heap) if options.command: InspectionShell(reader, heap).onecmd(options.command) if options.shell: try: InspectionShell(reader, heap).cmdloop("type help to get help") except KeyboardInterrupt: print "Kthxbye." elif not options.command: if reader.exception is not None: print "Annotated stack (from exception.esp to bottom):" padawan = InspectionPadawan(reader, heap) padawan.InterpretMemory(stack_top, stack_bottom) reader.Dispose() if __name__ == "__main__": parser = optparse.OptionParser(USAGE) parser.add_option("-s", "--shell", dest="shell", action="store_true", help="start an interactive inspector shell") parser.add_option("-w", "--web", dest="web", action="store_true", help="start a web server on localhost:%i" % PORT_NUMBER) parser.add_option("-c", "--command", dest="command", default="", help="run an interactive inspector shell command and exit") parser.add_option("-f", "--full", dest="full", action="store_true", help="dump all information contained in the minidump") parser.add_option("--symdir", dest="symdir", default=".", help="directory containing *.pdb.sym file with symbols") parser.add_option("--objdump", default="/usr/bin/objdump", help="objdump tool to use [default: %default]") options, args = parser.parse_args() if os.path.exists(options.objdump): disasm.OBJDUMP_BIN = options.objdump OBJDUMP_BIN = options.objdump else: print "Cannot find %s, falling back to default objdump" % options.objdump if len(args) != 1: parser.print_help() sys.exit(1) if options.web: try: server = InspectionWebServer(PORT_NUMBER, options, args[0]) print 'Started httpserver on port ' , PORT_NUMBER webbrowser.open('http://localhost:%i/summary.html' % PORT_NUMBER) server.serve_forever() except KeyboardInterrupt: print '^C received, shutting down the web server' server.socket.close() else: AnalyzeMinidump(options, args[0])