Fix stack tool for library in apk crashes

Fix stack tool for library in apk crashes

This patches the python zipfile implementation to ignore struct unpack errors
in _decodeExtra. See http://bugs.python.org/issue14315

Also adds a --verbose option that enables a bunch of logging to help diagnose
failed symbolization.

Fixes stack tool for gn builds where libs are put in the top-level output
directory.

Committed: https://crrev.com/09d7b09acb5a91d53f9fc48a44549e7964213ef8
Cr-Commit-Position: refs/heads/master@{#325573}

[cjhopman, 2015-03-12 18:43:05]

cjhopman@chromium.org changed reviewers:
+ rmcilroy@chromium.org

[cjhopman, 2015-03-12 18:43:06]

rmcilroy: *

[rmcilroy, 2015-03-12 21:50:14]

A couple of comments, but lgtm.  Thanks for doing these fixes!

https://codereview.chromium.org/1006603002/diff/1/third_party/android_platfor...
File third_party/android_platform/development/scripts/stack (right):

https://codereview.chromium.org/1006603002/diff/1/third_party/android_platfor...
third_party/android_platform/development/scripts/stack:147:
logging.basicConfig(level=logging.DEBUG)
maybe add a common prefix to the log output to make it easier to spot amongst
any stacktrace output?

https://codereview.chromium.org/1006603002/diff/1/third_party/android_platfor...
File third_party/android_platform/development/scripts/stack_core.py (right):

https://codereview.chromium.org/1006603002/diff/1/third_party/android_platfor...
third_party/android_platform/development/scripts/stack_core.py:212:
logging.debug('symbol information: %s' % info)
nit - '/s/symbol/Symbol'

https://codereview.chromium.org/1006603002/diff/1/third_party/android_platfor...
File third_party/android_platform/development/scripts/symbol.py (right):

https://codereview.chromium.org/1006603002/diff/1/third_party/android_platfor...
third_party/android_platform/development/scripts/symbol.py:260: match =
re.match('.*/([^/]*)-[0-9]+\/[^/]*\.apk$', device_library_path)
Could you put some comments with examples for what these regexps are trying to
match against.  Any chance we can merge the regexps (if it's not super easy then
don't bother).

[cjhopman, 2015-04-17 00:28:02]

The CQ bit was checked by cjhopman@chromium.org

[cjhopman, 2015-04-17 00:28:02]

The patchset sent to the CQ was uploaded after l-g-t-m from
rmcilroy@chromium.org
Link to the patchset: https://codereview.chromium.org/1006603002/#ps20001
(title: " ")

[commit-bot: I haz the power, 2015-04-17 00:28:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1006603002/20001

[commit-bot: I haz the power, 2015-04-17 00:56:48]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-04-17 00:57:48]

Patchset 2 (id:??) landed as
https://crrev.com/09d7b09acb5a91d53f9fc48a44549e7964213ef8
Cr-Commit-Position: refs/heads/master@{#325573}