--- /dev/null
+#!/usr/bin/env python
+#
+# Copyright 2011 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 ctypes
+import mmap
+import optparse
+import os
+import disasm
+import sys
+import types
+import codecs
+import re
+
+
+USAGE="""usage: %prog [OPTION]...
+
+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 (pushed return addresses) are marked with "=>".
+
+
+Examples:
+ $ %prog 12345678-1234-1234-1234-123456789abcd-full.dmp
+"""
+
+DEBUG=False
+
+
+def DebugPrint(s):
+ if not DEBUG: return
+ print s
+
+
+class Descriptor(object):
+ """Descriptor of a structure in a memory."""
+
+ def __init__(self, fields):
+ self.fields = fields
+ self.is_flexible = False
+ for _, type_or_func in fields:
+ if isinstance(type_or_func, types.FunctionType):
+ self.is_flexible = True
+ break
+ if not self.is_flexible:
+ self.ctype = Descriptor._GetCtype(fields)
+ self.size = ctypes.sizeof(self.ctype)
+
+ def Read(self, memory, offset):
+ if self.is_flexible:
+ fields_copy = self.fields[:]
+ last = 0
+ for name, type_or_func in fields_copy:
+ if isinstance(type_or_func, types.FunctionType):
+ partial_ctype = Descriptor._GetCtype(fields_copy[:last])
+ partial_object = partial_ctype.from_buffer(memory, offset)
+ type = type_or_func(partial_object)
+ if type is not None:
+ fields_copy[last] = (name, type)
+ last += 1
+ else:
+ last += 1
+ complete_ctype = Descriptor._GetCtype(fields_copy[:last])
+ else:
+ complete_ctype = self.ctype
+ return complete_ctype.from_buffer(memory, offset)
+
+ @staticmethod
+ def _GetCtype(fields):
+ class Raw(ctypes.Structure):
+ _fields_ = fields
+ _pack_ = 1
+
+ def __str__(self):
+ return "{" + ", ".join("%s: %s" % (field, self.__getattribute__(field))
+ for field, _ in Raw._fields_) + "}"
+ return Raw
+
+
+# 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_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))
+])
+
+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_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)
+])
+
+
+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.exception = None
+ self.exception_context = None
+ self.memory_list = None
+ self.thread_map = {}
+ for d in directories:
+ DebugPrint(d)
+ # TODO(vitalyr): extract system info including CPU features.
+ if d.stream_type == MD_EXCEPTION_STREAM:
+ self.exception = MINIDUMP_EXCEPTION_STREAM.Read(
+ self.minidump, d.location.rva)
+ DebugPrint(self.exception)
+ self.exception_context = MINIDUMP_CONTEXT_X86.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)
+ 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_MEMORY_LIST_STREAM:
+ print >>sys.stderr, "Warning: not a full minidump"
+ ml = MINIDUMP_MEMORY_LIST.Read(self.minidump, d.location.rva)
+ DebugPrint(ml)
+ for m in ml.ranges:
+ DebugPrint(m)
+ elif d.stream_type == MD_MEMORY_64_LIST_STREAM:
+ assert self.memory_list is None
+ self.memory_list = MINIDUMP_MEMORY_LIST64.Read(
+ self.minidump, d.location.rva)
+ assert ctypes.sizeof(self.memory_list) == d.location.data_size
+ DebugPrint(self.memory_list)
+
+ def IsValidAddress(self, address):
+ return self.FindLocation(address) is not None
+
+ def ReadU8(self, address):
+ location = self.FindLocation(address)
+ return ctypes.c_uint8.from_buffer(self.minidump, location).value
+
+ def ReadU32(self, address):
+ location = self.FindLocation(address)
+ return ctypes.c_uint32.from_buffer(self.minidump, location).value
+
+ def ReadBytes(self, address, size):
+ location = self.FindLocation(address)
+ return self.minidump[location:location + size]
+
+ def FindLocation(self, address):
+ # TODO(vitalyr): only works for full minidumps (...64 structure variants).
+ offset = 0
+ for r in self.memory_list.ranges:
+ if r.start <= address < r.start + r.size:
+ return self.memory_list.base_rva + offset + address - r.start
+ offset += r.size
+ return None
+
+ def GetDisasmLines(self, address, size):
+ location = self.FindLocation(address)
+ if location is None: return []
+ return disasm.GetDisasmLines(self.minidump_name,
+ location,
+ size,
+ "ia32",
+ False)
+
+
+ def Dispose(self):
+ self.minidump.close()
+ self.minidump_file.close()
+
+
+# List of V8 instance types. Obtained by adding the code below to any .cc file.
+#
+# #define DUMP_TYPE(T) printf("%d: \"%s\",\n", T, #T);
+# struct P {
+# P() {
+# printf("{\n");
+# INSTANCE_TYPE_LIST(DUMP_TYPE)
+# printf("}\n");
+# }
+# };
+# static P p;
+INSTANCE_TYPES = {
+ 64: "SYMBOL_TYPE",
+ 68: "ASCII_SYMBOL_TYPE",
+ 65: "CONS_SYMBOL_TYPE",
+ 69: "CONS_ASCII_SYMBOL_TYPE",
+ 66: "EXTERNAL_SYMBOL_TYPE",
+ 74: "EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE",
+ 70: "EXTERNAL_ASCII_SYMBOL_TYPE",
+ 0: "STRING_TYPE",
+ 4: "ASCII_STRING_TYPE",
+ 1: "CONS_STRING_TYPE",
+ 5: "CONS_ASCII_STRING_TYPE",
+ 2: "EXTERNAL_STRING_TYPE",
+ 10: "EXTERNAL_STRING_WITH_ASCII_DATA_TYPE",
+ 6: "EXTERNAL_ASCII_STRING_TYPE",
+ 6: "PRIVATE_EXTERNAL_ASCII_STRING_TYPE",
+ 128: "MAP_TYPE",
+ 129: "CODE_TYPE",
+ 130: "ODDBALL_TYPE",
+ 131: "JS_GLOBAL_PROPERTY_CELL_TYPE",
+ 132: "HEAP_NUMBER_TYPE",
+ 133: "PROXY_TYPE",
+ 134: "BYTE_ARRAY_TYPE",
+ 135: "PIXEL_ARRAY_TYPE",
+ 136: "EXTERNAL_BYTE_ARRAY_TYPE",
+ 137: "EXTERNAL_UNSIGNED_BYTE_ARRAY_TYPE",
+ 138: "EXTERNAL_SHORT_ARRAY_TYPE",
+ 139: "EXTERNAL_UNSIGNED_SHORT_ARRAY_TYPE",
+ 140: "EXTERNAL_INT_ARRAY_TYPE",
+ 141: "EXTERNAL_UNSIGNED_INT_ARRAY_TYPE",
+ 142: "EXTERNAL_FLOAT_ARRAY_TYPE",
+ 143: "FILLER_TYPE",
+ 144: "ACCESSOR_INFO_TYPE",
+ 145: "ACCESS_CHECK_INFO_TYPE",
+ 146: "INTERCEPTOR_INFO_TYPE",
+ 147: "CALL_HANDLER_INFO_TYPE",
+ 148: "FUNCTION_TEMPLATE_INFO_TYPE",
+ 149: "OBJECT_TEMPLATE_INFO_TYPE",
+ 150: "SIGNATURE_INFO_TYPE",
+ 151: "TYPE_SWITCH_INFO_TYPE",
+ 152: "SCRIPT_TYPE",
+ 153: "CODE_CACHE_TYPE",
+ 156: "FIXED_ARRAY_TYPE",
+ 157: "SHARED_FUNCTION_INFO_TYPE",
+ 158: "JS_MESSAGE_OBJECT_TYPE",
+ 159: "JS_VALUE_TYPE",
+ 160: "JS_OBJECT_TYPE",
+ 161: "JS_CONTEXT_EXTENSION_OBJECT_TYPE",
+ 162: "JS_GLOBAL_OBJECT_TYPE",
+ 163: "JS_BUILTINS_OBJECT_TYPE",
+ 164: "JS_GLOBAL_PROXY_TYPE",
+ 165: "JS_ARRAY_TYPE",
+ 166: "JS_REGEXP_TYPE",
+ 167: "JS_FUNCTION_TYPE",
+ 154: "DEBUG_INFO_TYPE",
+ 155: "BREAK_POINT_INFO_TYPE",
+}
+
+
+class Printer(object):
+ """Printer with indentation support."""
+
+ def __init__(self):
+ self.indent = 0
+
+ def Indent(self):
+ self.indent += 2
+
+ def Dedent(self):
+ self.indent -= 2
+
+ def Print(self, string):
+ print "%s%s" % (self._IndentString(), string)
+
+ def PrintLines(self, lines):
+ indent = self._IndentString()
+ print "\n".join("%s%s" % (indent, line) for line in lines)
+
+ def _IndentString(self):
+ return self.indent * " "
+
+
+ADDRESS_RE = re.compile(r"0x[0-9a-fA-F]+")
+
+
+def FormatDisasmLine(start, heap, line):
+ line_address = start + line[0]
+ stack_slot = heap.stack_map.get(line_address)
+ marker = " "
+ if stack_slot:
+ marker = "=>"
+ code = AnnotateAddresses(heap, line[1])
+ return "%s%08x %08x: %s" % (marker, line_address, line[0], code)
+
+
+def AnnotateAddresses(heap, line):
+ extra = []
+ for m in ADDRESS_RE.finditer(line):
+ maybe_address = int(m.group(0), 16)
+ object = heap.FindObject(maybe_address)
+ if not object: continue
+ extra.append(str(object))
+ if len(extra) == 0: return line
+ return "%s ;; %s" % (line, ", ".join(extra))
+
+
+class HeapObject(object):
+ def __init__(self, heap, map, address):
+ self.heap = heap
+ self.map = map
+ self.address = address
+
+ def Is(self, cls):
+ return isinstance(self, cls)
+
+ def Print(self, p):
+ p.Print(str(self))
+
+ def __str__(self):
+ return "HeapObject(%08x, %s)" % (self.address,
+ INSTANCE_TYPES[self.map.instance_type])
+
+ def ObjectField(self, offset):
+ field_value = self.heap.reader.ReadU32(self.address + offset)
+ return self.heap.FindObjectOrSmi(field_value)
+
+ def SmiField(self, offset):
+ field_value = self.heap.reader.ReadU32(self.address + offset)
+ assert (field_value & 1) == 0
+ return field_value / 2
+
+
+class Map(HeapObject):
+ INSTANCE_TYPE_OFFSET = 8
+
+ def __init__(self, heap, map, address):
+ HeapObject.__init__(self, heap, map, address)
+ self.instance_type = \
+ heap.reader.ReadU8(self.address + Map.INSTANCE_TYPE_OFFSET)
+
+
+class String(HeapObject):
+ LENGTH_OFFSET = 4
+
+ def __init__(self, heap, map, address):
+ HeapObject.__init__(self, heap, map, address)
+ self.length = self.SmiField(String.LENGTH_OFFSET)
+
+ def GetChars(self):
+ return "?string?"
+
+ def Print(self, p):
+ p.Print(str(self))
+
+ def __str__(self):
+ return "\"%s\"" % self.GetChars()
+
+
+class SeqString(String):
+ CHARS_OFFSET = 12
+
+ def __init__(self, heap, map, address):
+ String.__init__(self, heap, map, address)
+ self.chars = heap.reader.ReadBytes(self.address + SeqString.CHARS_OFFSET,
+ self.length)
+
+ def GetChars(self):
+ return self.chars
+
+
+class ExternalString(String):
+ RESOURCE_OFFSET = 12
+
+ WEBKIT_RESOUCE_STRING_IMPL_OFFSET = 4
+ WEBKIT_STRING_IMPL_CHARS_OFFSET = 8
+
+ def __init__(self, heap, map, address):
+ String.__init__(self, heap, map, address)
+ reader = heap.reader
+ self.resource = \
+ reader.ReadU32(self.address + ExternalString.RESOURCE_OFFSET)
+ self.chars = "?external string?"
+ if not reader.IsValidAddress(self.resource): return
+ string_impl_address = self.resource + \
+ ExternalString.WEBKIT_RESOUCE_STRING_IMPL_OFFSET
+ if not reader.IsValidAddress(string_impl_address): return
+ string_impl = reader.ReadU32(string_impl_address)
+ chars_ptr_address = string_impl + \
+ ExternalString.WEBKIT_STRING_IMPL_CHARS_OFFSET
+ if not reader.IsValidAddress(chars_ptr_address): return
+ chars_ptr = reader.ReadU32(chars_ptr_address)
+ if not reader.IsValidAddress(chars_ptr): return
+ raw_chars = reader.ReadBytes(chars_ptr, 2 * self.length)
+ self.chars = codecs.getdecoder("utf16")(raw_chars)[0]
+
+ def GetChars(self):
+ return self.chars
+
+
+class ConsString(String):
+ LEFT_OFFSET = 12
+ RIGHT_OFFSET = 16
+
+ def __init__(self, heap, map, address):
+ String.__init__(self, heap, map, address)
+ self.left = self.ObjectField(ConsString.LEFT_OFFSET)
+ self.right = self.ObjectField(ConsString.RIGHT_OFFSET)
+
+ def GetChars(self):
+ return self.left.GetChars() + self.right.GetChars()
+
+
+class Oddball(HeapObject):
+ TO_STRING_OFFSET = 4
+
+ def __init__(self, heap, map, address):
+ HeapObject.__init__(self, heap, map, address)
+ self.to_string = self.ObjectField(Oddball.TO_STRING_OFFSET)
+
+ def Print(self, p):
+ p.Print(str(self))
+
+ def __str__(self):
+ return "<%s>" % self.to_string.GetChars()
+
+
+class FixedArray(HeapObject):
+ LENGTH_OFFSET = 4
+ ELEMENTS_OFFSET = 8
+
+ def __init__(self, heap, map, address):
+ HeapObject.__init__(self, heap, map, address)
+ self.length = self.SmiField(FixedArray.LENGTH_OFFSET)
+
+ def Print(self, p):
+ p.Print("FixedArray(%08x) {" % self.address)
+ p.Indent()
+ p.Print("length: %d" % self.length)
+ for i in xrange(self.length):
+ offset = FixedArray.ELEMENTS_OFFSET + 4 * i
+ p.Print("[%08d] = %s" % (i, self.ObjectField(offset)))
+ p.Dedent()
+ p.Print("}")
+
+ def __str__(self):
+ return "FixedArray(%08x, length=%d)" % (self.address, self.length)
+
+
+class JSFunction(HeapObject):
+ CODE_ENTRY_OFFSET = 12
+ SHARED_OFFSET = 20
+
+ def __init__(self, heap, map, address):
+ HeapObject.__init__(self, heap, map, address)
+ code_entry = \
+ heap.reader.ReadU32(self.address + JSFunction.CODE_ENTRY_OFFSET)
+ self.code = heap.FindObject(code_entry - Code.ENTRY_OFFSET + 1)
+ self.shared = self.ObjectField(JSFunction.SHARED_OFFSET)
+
+ def Print(self, p):
+ source = "\n".join(" %s" % line for line in self._GetSource().split("\n"))
+ p.Print("JSFunction(%08x) {" % self.address)
+ p.Indent()
+ p.Print("inferred name: %s" % self.shared.inferred_name)
+ if self.shared.script.Is(Script) and self.shared.script.name.Is(String):
+ p.Print("script name: %s" % self.shared.script.name)
+ p.Print("source:")
+ p.PrintLines(self._GetSource().split("\n"))
+ p.Print("code:")
+ self.code.Print(p)
+ if self.code != self.shared.code:
+ p.Print("unoptimized code:")
+ self.shared.code.Print(p)
+ p.Dedent()
+ p.Print("}")
+
+ def __str__(self):
+ inferred_name = ""
+ if self.shared.Is(SharedFunctionInfo):
+ inferred_name = self.shared.inferred_name
+ return "JSFunction(%08x, %s)" % (self.address, inferred_name)
+
+ def _GetSource(self):
+ source = "?source?"
+ start = self.shared.start_position
+ end = self.shared.end_position
+ if not self.shared.script.Is(Script): return source
+ script_source = self.shared.script.source
+ if not script_source.Is(String): return source
+ return script_source.GetChars()[start:end]
+
+
+class SharedFunctionInfo(HeapObject):
+ CODE_OFFSET = 2 * 4
+ SCRIPT_OFFSET = 7 * 4
+ INFERRED_NAME_OFFSET = 9 * 4
+ START_POSITION_AND_TYPE_OFFSET = 17 * 4
+ END_POSITION_OFFSET = 18 * 4
+
+ def __init__(self, heap, map, address):
+ HeapObject.__init__(self, heap, map, address)
+ self.code = self.ObjectField(SharedFunctionInfo.CODE_OFFSET)
+ self.script = self.ObjectField(SharedFunctionInfo.SCRIPT_OFFSET)
+ self.inferred_name = \
+ self.ObjectField(SharedFunctionInfo.INFERRED_NAME_OFFSET)
+ start_position_and_type = \
+ self.SmiField(SharedFunctionInfo.START_POSITION_AND_TYPE_OFFSET)
+ self.start_position = start_position_and_type >> 2
+ self.end_position = self.SmiField(SharedFunctionInfo.END_POSITION_OFFSET)
+
+
+class Script(HeapObject):
+ SOURCE_OFFSET = 4
+ NAME_OFFSET = 8
+
+ def __init__(self, heap, map, address):
+ HeapObject.__init__(self, heap, map, address)
+ self.source = self.ObjectField(Script.SOURCE_OFFSET)
+ self.name = self.ObjectField(Script.NAME_OFFSET)
+
+
+class Code(HeapObject):
+ INSTRUCTION_SIZE_OFFSET = 4
+ ENTRY_OFFSET = 32
+
+ def __init__(self, heap, map, address):
+ HeapObject.__init__(self, heap, map, address)
+ self.entry = self.address + Code.ENTRY_OFFSET
+ self.instruction_size = \
+ heap.reader.ReadU32(self.address + Code.INSTRUCTION_SIZE_OFFSET)
+
+ def Print(self, p):
+ lines = self.heap.reader.GetDisasmLines(self.entry, self.instruction_size)
+ p.Print("Code(%08x) {" % self.address)
+ p.Indent()
+ p.Print("instruction_size: %d" % self.instruction_size)
+ p.PrintLines(self._FormatLine(line) for line in lines)
+ p.Dedent()
+ p.Print("}")
+
+ def _FormatLine(self, line):
+ return FormatDisasmLine(self.entry, self.heap, line)
+
+
+class V8Heap(object):
+ CLASS_MAP = {
+ "SYMBOL_TYPE": SeqString,
+ "ASCII_SYMBOL_TYPE": SeqString,
+ "CONS_SYMBOL_TYPE": ConsString,
+ "CONS_ASCII_SYMBOL_TYPE": ConsString,
+ "EXTERNAL_SYMBOL_TYPE": ExternalString,
+ "EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE": ExternalString,
+ "EXTERNAL_ASCII_SYMBOL_TYPE": ExternalString,
+ "STRING_TYPE": SeqString,
+ "ASCII_STRING_TYPE": SeqString,
+ "CONS_STRING_TYPE": ConsString,
+ "CONS_ASCII_STRING_TYPE": ConsString,
+ "EXTERNAL_STRING_TYPE": ExternalString,
+ "EXTERNAL_STRING_WITH_ASCII_DATA_TYPE": ExternalString,
+ "EXTERNAL_ASCII_STRING_TYPE": ExternalString,
+
+ "MAP_TYPE": Map,
+ "ODDBALL_TYPE": Oddball,
+ "FIXED_ARRAY_TYPE": FixedArray,
+ "JS_FUNCTION_TYPE": JSFunction,
+ "SHARED_FUNCTION_INFO_TYPE": SharedFunctionInfo,
+ "SCRIPT_TYPE": Script,
+ "CODE_TYPE": Code
+ }
+
+ def __init__(self, reader, stack_map):
+ self.reader = reader
+ self.stack_map = stack_map
+ self.objects = {}
+
+ def FindObjectOrSmi(self, tagged_address):
+ if (tagged_address & 1) == 0: return tagged_address / 2
+ return self.FindObject(tagged_address)
+
+ def FindObject(self, tagged_address):
+ if tagged_address in self.objects:
+ return self.objects[tagged_address]
+ if (tagged_address & 1) != 1: return None
+ address = tagged_address - 1
+ if not self.reader.IsValidAddress(address): return None
+ map_tagged_address = self.reader.ReadU32(address)
+ if tagged_address == map_tagged_address:
+ # Meta map?
+ meta_map = Map(self, None, address)
+ instance_type_name = INSTANCE_TYPES.get(meta_map.instance_type)
+ if instance_type_name != "MAP_TYPE": return None
+ meta_map.map = meta_map
+ object = meta_map
+ else:
+ map = self.FindObject(map_tagged_address)
+ if map is None: return None
+ instance_type_name = INSTANCE_TYPES.get(map.instance_type)
+ if instance_type_name is None: return None
+ cls = V8Heap.CLASS_MAP.get(instance_type_name, HeapObject)
+ object = cls(self, map, address)
+ self.objects[tagged_address] = object
+ return object
+
+
+EIP_PROXIMITY = 64
+
+
+def AnalyzeMinidump(options, minidump_name):
+ reader = MinidumpReader(options, minidump_name)
+ DebugPrint("========================================")
+ if reader.exception is None:
+ print "Minidump has no exception info"
+ return
+ print "Exception info:"
+ exception_thread = reader.thread_map[reader.exception.thread_id]
+ print " thread id: %d" % exception_thread.id
+ print " code: %08X" % reader.exception.exception.code
+ print " context:"
+ print " eax: %08x" % reader.exception_context.eax
+ print " ebx: %08x" % reader.exception_context.ebx
+ print " ecx: %08x" % reader.exception_context.ecx
+ print " edx: %08x" % reader.exception_context.edx
+ print " edi: %08x" % reader.exception_context.edi
+ print " esi: %08x" % reader.exception_context.esi
+ print " ebp: %08x" % reader.exception_context.ebp
+ print " esp: %08x" % reader.exception_context.esp
+ print " eip: %08x" % reader.exception_context.eip
+ # TODO(vitalyr): decode eflags.
+ print " eflags: %s" % bin(reader.exception_context.eflags)[2:]
+ print
+
+ stack_bottom = exception_thread.stack.start + \
+ exception_thread.stack.memory.data_size
+ stack_map = {reader.exception_context.eip: -1}
+ for slot in xrange(reader.exception_context.esp, stack_bottom, 4):
+ maybe_address = reader.ReadU32(slot)
+ if not maybe_address in stack_map:
+ stack_map[maybe_address] = slot
+ heap = V8Heap(reader, stack_map)
+
+ print "Disassembly around exception.eip:"
+ start = reader.exception_context.eip - EIP_PROXIMITY
+ lines = reader.GetDisasmLines(start, 2 * EIP_PROXIMITY)
+ for line in lines:
+ print FormatDisasmLine(start, heap, line)
+ print
+
+ print "Annotated stack (from exception.esp to bottom):"
+ for slot in xrange(reader.exception_context.esp, stack_bottom, 4):
+ maybe_address = reader.ReadU32(slot)
+ heap_object = heap.FindObject(maybe_address)
+ print "%08x: %08x" % (slot, maybe_address)
+ if heap_object:
+ heap_object.Print(Printer())
+ print
+
+ reader.Dispose()
+
+
+if __name__ == "__main__":
+ parser = optparse.OptionParser(USAGE)
+ options, args = parser.parse_args()
+ if len(args) != 1:
+ parser.print_help()
+ sys.exit(1)
+ AnalyzeMinidump(options, args[0])
projects / platform / upstream / v8.git / commitdiff