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Update the stack script for apk handling.

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The dlopen of a shared library within an apk is not handled by
the stack tool. Modify to understand and search through the apk to
find the shared library associated with the offset. Then unzip
that shared library to use as the target of addr2line.

Change-Id: I404302f68dff45c35a1dc2a55547f42ea04f02bf
This commit is contained in:
Christopher Ferris
2015-08-20 20:09:09 -07:00
parent 8ae499e1d3
commit ece64c4bd5
2 changed files with 114 additions and 11 deletions
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105
scripts/stack_core.py
View File

@@ -16,8 +16,11 @@
"""stack symbolizes native crash dumps."""
import os
import re
import subprocess
import symbol
import tempfile
import unittest
import example_crashes
@@ -41,11 +44,13 @@ class TraceConverter:
sanitizer_trace_line = re.compile("$a")
value_line = re.compile("$a")
code_line = re.compile("$a")
unzip_line = re.compile("\s*(\d+)\s+\S+\s+\S+\s+(\S+)")
trace_lines = []
value_lines = []
last_frame = -1
width = "{8}"
spacing = ""
apk_info = dict()
def __init__(self):
self.UpdateAbiRegexes()
@@ -87,6 +92,7 @@ class TraceConverter:
"(?P<offset>[0-9a-f]" + self.width + ")[ \t]+" # Offset (hex number given without
# 0x prefix).
"(?P<dso>[^\r\n \t]*)" # Library name.
"( \(offset (?P<so_offset>0x[0-9a-fA-F]+)\))?" # Offset into the file to find the start of the shared so.
"(?P<symbolpresent> \((?P<symbol>.*)\))?") # Is the symbol there?
# pylint: disable-msg=C6310
# Sanitizer output. This is different from debuggerd output, and it is easier to handle this as
@@ -160,17 +166,28 @@ class TraceConverter:
print
print "-----------------------------------------------------\n"
def DeleteApkTmpFiles(self):
for _, offset_list in self.apk_info.values():
for _, _, tmp_file in offset_list:
if tmp_file:
os.unlink(tmp_file)
def ConvertTrace(self, lines):
lines = map(self.CleanLine, lines)
try:
for line in lines:
self.ProcessLine(line)
self.PrintOutput(self.trace_lines, self.value_lines)
finally:
# Delete any temporary files created while processing the lines.
self.DeleteApkTmpFiles()
def MatchTraceLine(self, line):
if self.trace_line.match(line):
match = self.trace_line.match(line)
return {"frame": match.group("frame"),
"offset": match.group("offset"),
"so_offset": match.group("so_offset"),
"dso": match.group("dso"),
"symbol_present": bool(match.group("symbolpresent")),
"symbol_name": match.group("symbol")}
@@ -183,6 +200,79 @@ class TraceConverter:
"symbol_name": None}
return None
def ExtractLibFromApk(self, apk, shared_lib_name):
# Create a temporary file containing the shared library from the apk.
tmp_file = None
try:
tmp_fd, tmp_file = tempfile.mkstemp()
if subprocess.call(["unzip", "-p", apk, shared_lib_name], stdout=tmp_fd) == 0:
os.close(tmp_fd)
shared_file = tmp_file
tmp_file = None
return shared_file
finally:
if tmp_file:
os.close(tmp_fd)
os.unlink(tmp_file)
return None
def GetLibFromApk(self, apk, offset):
# Convert the string to hex.
offset = int(offset, 16)
# Check if we already have information about this offset.
if apk in self.apk_info:
apk_full_path, offset_list = self.apk_info[apk]
for current_offset, file_name, tmp_file in offset_list:
if offset <= current_offset:
if tmp_file:
return file_name, tmp_file
# This modifies the value in offset_list.
tmp_file = self.ExtractLibFromApk(apk_full_path, file_name)
if tmp_file:
return file_name, tmp_file
break
return None, None
if not "ANDROID_PRODUCT_OUT" in os.environ:
print "ANDROID_PRODUCT_OUT environment variable not set."
return None, None
out_dir = os.environ["ANDROID_PRODUCT_OUT"]
if not os.path.exists(out_dir):
print "ANDROID_PRODUCT_OUT " + out_dir + " does not exist."
return None, None
if apk.startswith("/"):
apk_full_path = out_dir + apk
else:
apk_full_path = os.path.join(out_dir, apk)
if not os.path.exists(apk_full_path):
print "Cannot find apk " + apk;
return None, None
cmd = subprocess.Popen(["unzip", "-lqq", apk_full_path], stdout=subprocess.PIPE)
current_offset = 0
file_entry = None
offset_list = []
for line in cmd.stdout:
match = self.unzip_line.match(line)
if match:
# Round the size up to a page boundary.
current_offset += (int(match.group(1), 10) + 0x1000) & ~0xfff
offset_entry = [current_offset - 1, match.group(2), None]
offset_list.append(offset_entry)
if offset < current_offset and not file_entry:
file_entry = offset_entry
# Save the information from the zip.
self.apk_info[apk] = [apk_full_path, offset_list]
if not file_entry:
return None, None
tmp_shared_lib = self.ExtractLibFromApk(apk_full_path, file_entry[1])
if tmp_shared_lib:
file_entry[2] = tmp_shared_lib
return file_entry[1], file_entry[2]
return None, None
def ProcessLine(self, line):
ret = False
process_header = self.process_info_line.search(line)
@@ -230,6 +320,7 @@ class TraceConverter:
frame = trace_line_dict["frame"]
code_addr = trace_line_dict["offset"]
area = trace_line_dict["dso"]
so_offset = trace_line_dict["so_offset"]
symbol_present = trace_line_dict["symbol_present"]
symbol_name = trace_line_dict["symbol_name"]
@@ -243,9 +334,19 @@ class TraceConverter:
if area == "<unknown>" or area == "[heap]" or area == "[stack]":
self.trace_lines.append((code_addr, "", area))
else:
# If this is an apk, it usually means that there is actually
# a shared so that was loaded directly out of it. In that case,
# extract the shared library and the name of the shared library.
lib = None
if area.endswith(".apk") and so_offset:
lib_name, lib = self.GetLibFromApk(area, so_offset)
if not lib:
lib = area
lib_name = None
# If a calls b which further calls c and c is inlined to b, we want to
# display "a -> b -> c" in the stack trace instead of just "a -> c"
info = symbol.SymbolInformation(area, code_addr)
info = symbol.SymbolInformation(lib, code_addr)
nest_count = len(info) - 1
for (source_symbol, source_location, object_symbol_with_offset) in info:
if not source_symbol:
@@ -255,6 +356,8 @@ class TraceConverter:
source_symbol = "<unknown>"
if not source_location:
source_location = area
if lib_name:
source_location += "(" + lib_name + ")"
if nest_count > 0:
nest_count = nest_count - 1
arrow = "v------>"

8
scripts/symbol.py
View File

@@ -184,6 +184,8 @@ def CallAddr2LineForSet(lib, unique_addrs):
return None
symbols = SYMBOLS_DIR + lib
if not os.path.exists(symbols):
symbols = lib
if not os.path.exists(symbols):
return None
@@ -203,7 +205,7 @@ def CallAddr2LineForSet(lib, unique_addrs):
if symbol == "??":
symbol = None
location = child.stdout.readline().strip()
if location == "??:0":
if location == "??:0" or location == "??:?":
location = None
if symbol is None and location is None:
break
@@ -250,9 +252,7 @@ def CallObjdumpForSet(lib, unique_addrs):
symbols = SYMBOLS_DIR + lib
if not os.path.exists(symbols):
return None
symbols = SYMBOLS_DIR + lib
symbols = lib
if not os.path.exists(symbols):
return None