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Diffstat (limited to 'third_party/libwebrtc/build/android/pylib/symbols/symbol_utils.py')
| -rw-r--r-- | third_party/libwebrtc/build/android/pylib/symbols/symbol_utils.py | 813 |
1 files changed, 813 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/android/pylib/symbols/symbol_utils.py b/third_party/libwebrtc/build/android/pylib/symbols/symbol_utils.py new file mode 100644 index 0000000000..0b6ec8bb29 --- /dev/null +++ b/third_party/libwebrtc/build/android/pylib/symbols/symbol_utils.py @@ -0,0 +1,813 @@ +# Copyright 2018 The Chromium Authors. All rights reserved. +# Use of this source code is governed by a BSD-style license that can be +# found in the LICENSE file. + + + +import bisect +import collections +import logging +import os +import re + +from pylib.constants import host_paths +from pylib.symbols import elf_symbolizer + + +def _AndroidAbiToCpuArch(android_abi): + """Return the Chromium CPU architecture name for a given Android ABI.""" + _ARCH_MAP = { + 'armeabi': 'arm', + 'armeabi-v7a': 'arm', + 'arm64-v8a': 'arm64', + 'x86_64': 'x64', + } + return _ARCH_MAP.get(android_abi, android_abi) + + +def _HexAddressRegexpFor(android_abi): + """Return a regexp matching hexadecimal addresses for a given Android ABI.""" + if android_abi in ['x86_64', 'arm64-v8a', 'mips64']: + width = 16 + else: + width = 8 + return '[0-9a-f]{%d}' % width + + +class HostLibraryFinder(object): + """Translate device library path to matching host unstripped library path. + + Usage is the following: + 1) Create instance. + 2) Call AddSearchDir() once or more times to add host directory path to + look for unstripped native libraries. + 3) Call Find(device_libpath) repeatedly to translate a device-specific + library path into the corresponding host path to the unstripped + version. + """ + def __init__(self): + """Initialize instance.""" + self._search_dirs = [] + self._lib_map = {} # Map of library name to host file paths. + + def AddSearchDir(self, lib_dir): + """Add a directory to the search path for host native shared libraries. + + Args: + lib_dir: host path containing native libraries. + """ + if not os.path.exists(lib_dir): + logging.warning('Ignoring missing host library directory: %s', lib_dir) + return + if not os.path.isdir(lib_dir): + logging.warning('Ignoring invalid host library directory: %s', lib_dir) + return + self._search_dirs.append(lib_dir) + self._lib_map = {} # Reset the map. + + def Find(self, device_libpath): + """Find the host file path matching a specific device library path. + + Args: + device_libpath: device-specific file path to library or executable. + Returns: + host file path to the unstripped version of the library, or None. + """ + host_lib_path = None + lib_name = os.path.basename(device_libpath) + host_lib_path = self._lib_map.get(lib_name) + if not host_lib_path: + for search_dir in self._search_dirs: + lib_path = os.path.join(search_dir, lib_name) + if os.path.exists(lib_path): + host_lib_path = lib_path + break + + if not host_lib_path: + logging.debug('Could not find host library for: %s', lib_name) + self._lib_map[lib_name] = host_lib_path + + return host_lib_path + + + +class SymbolResolver(object): + """A base class for objets that can symbolize library (path, offset) + pairs into symbol information strings. Usage is the following: + + 1) Create new instance (by calling the constructor of a derived + class, since this is only the base one). + + 2) Call SetAndroidAbi() before any call to FindSymbolInfo() in order + to set the Android CPU ABI used for symbolization. + + 3) Before the first call to FindSymbolInfo(), one can call + AddLibraryOffset(), or AddLibraryOffsets() to record a set of offsets + that you will want to symbolize later through FindSymbolInfo(). Doing + so allows some SymbolResolver derived classes to work faster (e.g. the + one that invokes the 'addr2line' program, since the latter works faster + if the offsets provided as inputs are sorted in increasing order). + + 3) Call FindSymbolInfo(path, offset) to return the corresponding + symbol information string, or None if this doesn't correspond + to anything the instance can handle. + + Note that whether the path is specific to the device or to the + host depends on the derived class implementation. + """ + def __init__(self): + self._android_abi = None + self._lib_offsets_map = collections.defaultdict(set) + + def SetAndroidAbi(self, android_abi): + """Set the Android ABI value for this instance. + + Calling this function before FindSymbolInfo() is required by some + derived class implementations. + + Args: + android_abi: Native Android CPU ABI name (e.g. 'armeabi-v7a'). + Raises: + Exception if the ABI was already set with a different value. + """ + if self._android_abi and self._android_abi != android_abi: + raise Exception('Cannot reset Android ABI to new value %s, already set ' + 'to %s' % (android_abi, self._android_abi)) + + self._android_abi = android_abi + + def AddLibraryOffset(self, lib_path, offset): + """Associate a single offset to a given device library. + + This must be called before FindSymbolInfo(), otherwise its input arguments + will be ignored. + + Args: + lib_path: A library path. + offset: An integer offset within the corresponding library that will be + symbolized by future calls to FindSymbolInfo. + """ + self._lib_offsets_map[lib_path].add(offset) + + def AddLibraryOffsets(self, lib_path, lib_offsets): + """Associate a set of wanted offsets to a given device library. + + This must be called before FindSymbolInfo(), otherwise its input arguments + will be ignored. + + Args: + lib_path: A library path. + lib_offsets: An iterable of integer offsets within the corresponding + library that will be symbolized by future calls to FindSymbolInfo. + """ + self._lib_offsets_map[lib_path].update(lib_offsets) + + # pylint: disable=unused-argument,no-self-use + def FindSymbolInfo(self, lib_path, lib_offset): + """Symbolize a device library path and offset. + + Args: + lib_path: Library path (device or host specific, depending on the + derived class implementation). + lib_offset: Integer offset within the library. + Returns: + Corresponding symbol information string, or None. + """ + # The base implementation cannot symbolize anything. + return None + # pylint: enable=unused-argument,no-self-use + + +class ElfSymbolResolver(SymbolResolver): + """A SymbolResolver that can symbolize host path + offset values using + an elf_symbolizer.ELFSymbolizer instance. + """ + def __init__(self, addr2line_path_for_tests=None): + super(ElfSymbolResolver, self).__init__() + self._addr2line_path = addr2line_path_for_tests + + # Used to cache one ELFSymbolizer instance per library path. + self._elf_symbolizer_cache = {} + + # Used to cache FindSymbolInfo() results. Maps host library paths + # to (offset -> symbol info string) dictionaries. + self._symbol_info_cache = collections.defaultdict(dict) + self._allow_symbolizer = True + + def _CreateSymbolizerFor(self, host_path): + """Create the ELFSymbolizer instance associated with a given lib path.""" + addr2line_path = self._addr2line_path + if not addr2line_path: + if not self._android_abi: + raise Exception( + 'Android CPU ABI must be set before calling FindSymbolInfo!') + + cpu_arch = _AndroidAbiToCpuArch(self._android_abi) + self._addr2line_path = host_paths.ToolPath('addr2line', cpu_arch) + + return elf_symbolizer.ELFSymbolizer( + elf_file_path=host_path, addr2line_path=self._addr2line_path, + callback=ElfSymbolResolver._Callback, inlines=True) + + def DisallowSymbolizerForTesting(self): + """Disallow FindSymbolInfo() from using a symbolizer. + + This is used during unit-testing to ensure that the offsets that were + recorded via AddLibraryOffset()/AddLibraryOffsets() are properly + symbolized, but not anything else. + """ + self._allow_symbolizer = False + + def FindSymbolInfo(self, host_path, offset): + """Override SymbolResolver.FindSymbolInfo. + + Args: + host_path: Host-specific path to the native shared library. + offset: Integer offset within the native library. + Returns: + A symbol info string, or None. + """ + offset_map = self._symbol_info_cache[host_path] + symbol_info = offset_map.get(offset) + if symbol_info: + return symbol_info + + # Create symbolizer on demand. + symbolizer = self._elf_symbolizer_cache.get(host_path) + if not symbolizer: + symbolizer = self._CreateSymbolizerFor(host_path) + self._elf_symbolizer_cache[host_path] = symbolizer + + # If there are pre-recorded offsets for this path, symbolize them now. + offsets = self._lib_offsets_map.get(host_path) + if offsets: + offset_map = {} + for pre_offset in offsets: + symbolizer.SymbolizeAsync( + pre_offset, callback_arg=(offset_map, pre_offset)) + symbolizer.WaitForIdle() + self._symbol_info_cache[host_path] = offset_map + + symbol_info = offset_map.get(offset) + if symbol_info: + return symbol_info + + if not self._allow_symbolizer: + return None + + # Symbolize single offset. Slower if addresses are not provided in + # increasing order to addr2line. + symbolizer.SymbolizeAsync(offset, + callback_arg=(offset_map, offset)) + symbolizer.WaitForIdle() + return offset_map.get(offset) + + @staticmethod + def _Callback(sym_info, callback_arg): + offset_map, offset = callback_arg + offset_map[offset] = str(sym_info) + + +class DeviceSymbolResolver(SymbolResolver): + """A SymbolResolver instance that accepts device-specific path. + + Usage is the following: + 1) Create new instance, passing a parent SymbolResolver instance that + accepts host-specific paths, and a HostLibraryFinder instance. + + 2) Optional: call AddApkOffsets() to add offsets from within an APK + that contains uncompressed native shared libraries. + + 3) Use it as any SymbolResolver instance. + """ + def __init__(self, host_resolver, host_lib_finder): + """Initialize instance. + + Args: + host_resolver: A parent SymbolResolver instance that will be used + to resolve symbols from host library paths. + host_lib_finder: A HostLibraryFinder instance used to locate + unstripped libraries on the host. + """ + super(DeviceSymbolResolver, self).__init__() + self._host_lib_finder = host_lib_finder + self._bad_device_lib_paths = set() + self._host_resolver = host_resolver + + def SetAndroidAbi(self, android_abi): + super(DeviceSymbolResolver, self).SetAndroidAbi(android_abi) + self._host_resolver.SetAndroidAbi(android_abi) + + def AddLibraryOffsets(self, device_lib_path, lib_offsets): + """Associate a set of wanted offsets to a given device library. + + This must be called before FindSymbolInfo(), otherwise its input arguments + will be ignored. + + Args: + device_lib_path: A device-specific library path. + lib_offsets: An iterable of integer offsets within the corresponding + library that will be symbolized by future calls to FindSymbolInfo. + want to symbolize. + """ + if device_lib_path in self._bad_device_lib_paths: + return + + host_lib_path = self._host_lib_finder.Find(device_lib_path) + if not host_lib_path: + # NOTE: self._bad_device_lib_paths is only used to only print this + # warning once per bad library. + logging.warning('Could not find host library matching device path: %s', + device_lib_path) + self._bad_device_lib_paths.add(device_lib_path) + return + + self._host_resolver.AddLibraryOffsets(host_lib_path, lib_offsets) + + def AddApkOffsets(self, device_apk_path, apk_offsets, apk_translator): + """Associate a set of wanted offsets to a given device APK path. + + This converts the APK-relative offsets into offsets relative to the + uncompressed libraries it contains, then calls AddLibraryOffsets() + for each one of the libraries. + + Must be called before FindSymbolInfo() as well, otherwise input arguments + will be ignored. + + Args: + device_apk_path: Device-specific APK path. + apk_offsets: Iterable of offsets within the APK file. + apk_translator: An ApkLibraryPathTranslator instance used to extract + library paths from the APK. + """ + libraries_map = collections.defaultdict(set) + for offset in apk_offsets: + lib_path, lib_offset = apk_translator.TranslatePath(device_apk_path, + offset) + libraries_map[lib_path].add(lib_offset) + + for lib_path, lib_offsets in libraries_map.items(): + self.AddLibraryOffsets(lib_path, lib_offsets) + + def FindSymbolInfo(self, device_path, offset): + """Overrides SymbolResolver.FindSymbolInfo. + + Args: + device_path: Device-specific library path (e.g. + '/data/app/com.example.app-1/lib/x86/libfoo.so') + offset: Offset in device library path. + Returns: + Corresponding symbol information string, or None. + """ + host_path = self._host_lib_finder.Find(device_path) + if not host_path: + return None + + return self._host_resolver.FindSymbolInfo(host_path, offset) + + +class MemoryMap(object): + """Models the memory map of a given process. Usage is: + + 1) Create new instance, passing the Android ABI. + + 2) Call TranslateLine() whenever you want to detect and translate any + memory map input line. + + 3) Otherwise, it is possible to parse the whole memory map input with + ParseLines(), then call FindSectionForAddress() repeatedly in order + to translate a memory address into the corresponding mapping and + file information tuple (e.g. to symbolize stack entries). + """ + + # A named tuple describing interesting memory map line items. + # Fields: + # addr_start: Mapping start address in memory. + # file_offset: Corresponding file offset. + # file_size: Corresponding mapping size in bytes. + # file_path: Input file path. + # match: Corresponding regular expression match object. + LineTuple = collections.namedtuple('MemoryMapLineTuple', + 'addr_start,file_offset,file_size,' + 'file_path, match') + + # A name tuple describing a memory map section. + # Fields: + # address: Memory address. + # size: Size in bytes in memory + # offset: Starting file offset. + # path: Input file path. + SectionTuple = collections.namedtuple('MemoryMapSection', + 'address,size,offset,path') + + def __init__(self, android_abi): + """Initializes instance. + + Args: + android_abi: Android CPU ABI name (e.g. 'armeabi-v7a') + """ + hex_addr = _HexAddressRegexpFor(android_abi) + + # pylint: disable=line-too-long + # A regular expression used to match memory map entries which look like: + # b278c000-b2790fff r-- 4fda000 5000 /data/app/com.google.android.apps.chrome-2/base.apk + # pylint: enable=line-too-long + self._re_map_section = re.compile( + r'\s*(?P<addr_start>' + hex_addr + r')-(?P<addr_end>' + hex_addr + ')' + + r'\s+' + + r'(?P<perm>...)\s+' + + r'(?P<file_offset>[0-9a-f]+)\s+' + + r'(?P<file_size>[0-9a-f]+)\s*' + + r'(?P<file_path>[^ \t]+)?') + + self._addr_map = [] # Sorted list of (address, size, path, offset) tuples. + self._sorted_addresses = [] # Sorted list of address fields in _addr_map. + self._in_section = False + + def TranslateLine(self, line, apk_path_translator): + """Try to translate a memory map input line, if detected. + + This only takes care of converting mapped APK file path and offsets + into a corresponding uncompressed native library file path + new offsets, + e.g. '..... <offset> <size> /data/.../base.apk' gets + translated into '.... <new-offset> <size> /data/.../base.apk!lib/libfoo.so' + + This function should always work, even if ParseLines() was not called + previously. + + Args: + line: Input memory map / tombstone line. + apk_translator: An ApkLibraryPathTranslator instance, used to map + APK offsets into uncompressed native libraries + new offsets. + Returns: + Translated memory map line, if relevant, or unchanged input line + otherwise. + """ + t = self._ParseLine(line.rstrip()) + if not t: + return line + + new_path, new_offset = apk_path_translator.TranslatePath( + t.file_path, t.file_offset) + + if new_path == t.file_path: + return line + + pos = t.match.start('file_path') + return '%s%s (offset 0x%x)%s' % (line[0:pos], new_path, new_offset, + line[t.match.end('file_path'):]) + + def ParseLines(self, input_lines, in_section=False): + """Parse a list of input lines and extract the APK memory map out of it. + + Args: + input_lines: list, or iterable, of input lines. + in_section: Optional. If true, considers that the input lines are + already part of the memory map. Otherwise, wait until the start of + the section appears in the input before trying to record data. + Returns: + True iff APK-related memory map entries were found. False otherwise. + """ + addr_list = [] # list of (address, size, file_path, file_offset) tuples. + self._in_section = in_section + for line in input_lines: + t = self._ParseLine(line.rstrip()) + if not t: + continue + + addr_list.append(t) + + self._addr_map = sorted(addr_list, key=lambda x: x.addr_start) + self._sorted_addresses = [e.addr_start for e in self._addr_map] + return bool(self._addr_map) + + def _ParseLine(self, line): + """Used internally to recognized memory map input lines. + + Args: + line: Input logcat or tomstone line. + Returns: + A LineTuple instance on success, or None on failure. + """ + if not self._in_section: + self._in_section = line.startswith('memory map:') + return None + + m = self._re_map_section.match(line) + if not m: + self._in_section = False # End of memory map section + return None + + # Only accept .apk and .so files that are not from the system partitions. + file_path = m.group('file_path') + if not file_path: + return None + + if file_path.startswith('/system') or file_path.startswith('/vendor'): + return None + + if not (file_path.endswith('.apk') or file_path.endswith('.so')): + return None + + addr_start = int(m.group('addr_start'), 16) + file_offset = int(m.group('file_offset'), 16) + file_size = int(m.group('file_size'), 16) + + return self.LineTuple(addr_start, file_offset, file_size, file_path, m) + + def Dump(self): + """Print memory map for debugging.""" + print('MEMORY MAP [') + for t in self._addr_map: + print('[%08x-%08x %08x %08x %s]' % + (t.addr_start, t.addr_start + t.file_size, t.file_size, + t.file_offset, t.file_path)) + print('] MEMORY MAP') + + def FindSectionForAddress(self, addr): + """Find the map section corresponding to a specific memory address. + + Call this method only after using ParseLines() was called to extract + relevant information from the memory map. + + Args: + addr: Memory address + Returns: + A SectionTuple instance on success, or None on failure. + """ + pos = bisect.bisect_right(self._sorted_addresses, addr) + if pos > 0: + # All values in [0,pos) are <= addr, just ensure that the last + # one contains the address as well. + entry = self._addr_map[pos - 1] + if entry.addr_start + entry.file_size > addr: + return self.SectionTuple(entry.addr_start, entry.file_size, + entry.file_offset, entry.file_path) + return None + + +class BacktraceTranslator(object): + """Translates backtrace-related lines in a tombstone or crash report. + + Usage is the following: + 1) Create new instance with appropriate arguments. + 2) If the tombstone / logcat input is available, one can call + FindLibraryOffsets() in order to detect which library offsets + will need to be symbolized during a future parse. Doing so helps + speed up the ELF symbolizer. + 3) For each tombstone/logcat input line, call TranslateLine() to + try to detect and symbolize backtrace lines. + """ + + # A named tuple for relevant input backtrace lines. + # Fields: + # rel_pc: Instruction pointer, relative to offset in library start. + # location: Library or APK file path. + # offset: Load base of executable code in library or apk file path. + # match: The corresponding regular expression match object. + # Note: + # The actual instruction pointer always matches the position at + # |offset + rel_pc| in |location|. + LineTuple = collections.namedtuple('BacktraceLineTuple', + 'rel_pc,location,offset,match') + + def __init__(self, android_abi, apk_translator): + """Initialize instance. + + Args: + android_abi: Android CPU ABI name (e.g. 'armeabi-v7a'). + apk_translator: ApkLibraryPathTranslator instance used to convert + mapped APK file offsets into uncompressed library file paths with + new offsets. + """ + hex_addr = _HexAddressRegexpFor(android_abi) + + # A regular expression used to match backtrace lines. + self._re_backtrace = re.compile( + r'.*#(?P<frame>[0-9]{2})\s+' + + r'(..)\s+' + + r'(?P<rel_pc>' + hex_addr + r')\s+' + + r'(?P<location>[^ \t]+)' + + r'(\s+\(offset 0x(?P<offset>[0-9a-f]+)\))?') + + # In certain cases, offset will be provided as <location>+0x<offset> + # instead of <location> (offset 0x<offset>). This is a regexp to detect + # this. + self._re_location_offset = re.compile( + r'.*\+0x(?P<offset>[0-9a-f]+)$') + + self._apk_translator = apk_translator + self._in_section = False + + def _ParseLine(self, line): + """Used internally to detect and decompose backtrace input lines. + + Args: + line: input tombstone line. + Returns: + A LineTuple instance on success, None on failure. + """ + if not self._in_section: + self._in_section = line.startswith('backtrace:') + return None + + line = line.rstrip() + m = self._re_backtrace.match(line) + if not m: + self._in_section = False + return None + + location = m.group('location') + offset = m.group('offset') + if not offset: + m2 = self._re_location_offset.match(location) + if m2: + offset = m2.group('offset') + location = location[0:m2.start('offset') - 3] + + if not offset: + return None + + offset = int(offset, 16) + rel_pc = int(m.group('rel_pc'), 16) + + # Two cases to consider here: + # + # * If this is a library file directly mapped in memory, then |rel_pc| + # if the direct offset within the library, and doesn't need any kind + # of adjustement. + # + # * If this is a library mapped directly from an .apk file, then + # |rel_pc| is the offset in the APK, and |offset| happens to be the + # load base of the corresponding library. + # + if location.endswith('.so'): + # For a native library directly mapped from the file system, + return self.LineTuple(rel_pc, location, offset, m) + + if location.endswith('.apk'): + # For a native library inside an memory-mapped APK file, + new_location, new_offset = self._apk_translator.TranslatePath( + location, offset) + + return self.LineTuple(rel_pc, new_location, new_offset, m) + + # Ignore anything else (e.g. .oat or .odex files). + return None + + def FindLibraryOffsets(self, input_lines, in_section=False): + """Parse a tombstone's backtrace section and find all library offsets in it. + + Args: + input_lines: List or iterables of intput tombstone lines. + in_section: Optional. If True, considers that the stack section has + already started. + Returns: + A dictionary mapping device library paths to sets of offsets within + then. + """ + self._in_section = in_section + result = collections.defaultdict(set) + for line in input_lines: + t = self._ParseLine(line) + if not t: + continue + + result[t.location].add(t.offset + t.rel_pc) + return result + + def TranslateLine(self, line, symbol_resolver): + """Symbolize backtrace line if recognized. + + Args: + line: input backtrace line. + symbol_resolver: symbol resolver instance to use. This method will + call its FindSymbolInfo(device_lib_path, lib_offset) method to + convert offsets into symbol informations strings. + Returns: + Translated line (unchanged if not recognized as a back trace). + """ + t = self._ParseLine(line) + if not t: + return line + + symbol_info = symbol_resolver.FindSymbolInfo(t.location, + t.offset + t.rel_pc) + if not symbol_info: + symbol_info = 'offset 0x%x' % t.offset + + pos = t.match.start('location') + pos2 = t.match.end('offset') + 1 + if pos2 <= 0: + pos2 = t.match.end('location') + return '%s%s (%s)%s' % (line[:pos], t.location, symbol_info, line[pos2:]) + + +class StackTranslator(object): + """Translates stack-related lines in a tombstone or crash report.""" + + # A named tuple describing relevant stack input lines. + # Fields: + # address: Address as it appears in the stack. + # lib_path: Library path where |address| is mapped. + # lib_offset: Library load base offset. for |lib_path|. + # match: Corresponding regular expression match object. + LineTuple = collections.namedtuple('StackLineTuple', + 'address, lib_path, lib_offset, match') + + def __init__(self, android_abi, memory_map, apk_translator): + """Initialize instance.""" + hex_addr = _HexAddressRegexpFor(android_abi) + + # pylint: disable=line-too-long + # A regular expression used to recognize stack entries like: + # + # #05 bf89a180 bf89a1e4 [stack] + # bf89a1c8 a0c01c51 /data/app/com.google.android.apps.chrome-2/base.apk + # bf89a080 00000000 + # ........ ........ + # pylint: enable=line-too-long + self._re_stack_line = re.compile( + r'\s+(?P<frame_number>#[0-9]+)?\s*' + + r'(?P<stack_addr>' + hex_addr + r')\s+' + + r'(?P<stack_value>' + hex_addr + r')' + + r'(\s+(?P<location>[^ \t]+))?') + + self._re_stack_abbrev = re.compile(r'\s+[.]+\s+[.]+') + + self._memory_map = memory_map + self._apk_translator = apk_translator + self._in_section = False + + def _ParseLine(self, line): + """Check a given input line for a relevant _re_stack_line match. + + Args: + line: input tombstone line. + Returns: + A LineTuple instance on success, None on failure. + """ + line = line.rstrip() + if not self._in_section: + self._in_section = line.startswith('stack:') + return None + + m = self._re_stack_line.match(line) + if not m: + if not self._re_stack_abbrev.match(line): + self._in_section = False + return None + + location = m.group('location') + if not location: + return None + + if not location.endswith('.apk') and not location.endswith('.so'): + return None + + addr = int(m.group('stack_value'), 16) + t = self._memory_map.FindSectionForAddress(addr) + if t is None: + return None + + lib_path = t.path + lib_offset = t.offset + (addr - t.address) + + if lib_path.endswith('.apk'): + lib_path, lib_offset = self._apk_translator.TranslatePath( + lib_path, lib_offset) + + return self.LineTuple(addr, lib_path, lib_offset, m) + + def FindLibraryOffsets(self, input_lines, in_section=False): + """Parse a tombstone's stack section and find all library offsets in it. + + Args: + input_lines: List or iterables of intput tombstone lines. + in_section: Optional. If True, considers that the stack section has + already started. + Returns: + A dictionary mapping device library paths to sets of offsets within + then. + """ + result = collections.defaultdict(set) + self._in_section = in_section + for line in input_lines: + t = self._ParseLine(line) + if t: + result[t.lib_path].add(t.lib_offset) + return result + + def TranslateLine(self, line, symbol_resolver=None): + """Try to translate a line of the stack dump.""" + t = self._ParseLine(line) + if not t: + return line + + symbol_info = symbol_resolver.FindSymbolInfo(t.lib_path, t.lib_offset) + if not symbol_info: + return line + + pos = t.match.start('location') + pos2 = t.match.end('location') + return '%s%s (%s)%s' % (line[:pos], t.lib_path, symbol_info, line[pos2:]) |