Bug 1395540 - Part 4: Fix the DMD stacks. r=njn

This runs the DMD files through the DMD stack fixer so that we end up with
usable stacks instead of just offsets into libxul.

--HG--
extra : rebase_source : 486a9e0f97e9a0b5374784c8c5986449a7c12478

testing/awsy/awsy/test_memory_usage.py

@@ -4,6 +4,7 @@
 
 import fnmatch
 import glob
+import gzip
 import json
 import os
 import sys
@@ -116,11 +117,16 @@ class TestMemoryUsage(MarionetteTestCase):
         """
         Handles moving DMD reports from the temp dir to our resultsDir.
         """
+        from dmd import fixStackTraces
+
         # Move DMD files from temp dir to resultsDir.
         tmpdir = tempfile.gettempdir()
         tmp_files = os.listdir(tmpdir)
         for f in fnmatch.filter(tmp_files, "dmd-*.json.gz"):
             f = os.path.join(tmpdir, f)
+            self.logger.info("Fixing stacks for %s, this may take a while" % f)
+            isZipped = True
+            fixStackTraces(f, isZipped, gzip.open)
             shutil.move(f, self._resultsDir)
 
         # Also attempt to cleanup the unified memory reports.

testing/awsy/mach_commands.py

@@ -171,6 +171,10 @@ class MachCommands(MachCommandBase):
             for k, v in env_vars[arch].iteritems():
                 os.environ[k] = v
 
+            # Also add the bin dir to the python path so we can use dmd.py
+            if bin_dir not in sys.path:
+                sys.path.append(bin_dir)
+
         for k, v in kwargs.iteritems():
             setattr(args, k, v)