The Tor Browser / file comparison
comparison: tools/profiler/merge-profiles.py
tools/profiler/merge-profiles.py
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:f91a922d56f7 |
|---|---|
| 1 #!/usr/bin/env python | |
| 2 # | |
| 3 # This script takes b2g process profiles and merged them into a single profile. | |
| 4 # The meta data is taken from the first profile. The startTime for each profile | |
| 5 # is used to syncronized the samples. Each thread is moved into the merged | |
| 6 # profile. | |
| 7 # | |
| 8 import json | |
| 9 import re | |
| 10 import sys | |
| 11 | |
| 12 def MergeProfiles(files): | |
| 13 threads = [] | |
| 14 fileData = [] | |
| 15 symTable = dict() | |
| 16 meta = None | |
| 17 libs = None | |
| 18 minStartTime = None | |
| 19 | |
| 20 for fname in files: | |
| 21 match = re.match('profile_([0-9]+)_(.+)\.sym', fname) | |
| 22 if match is None: | |
| 23 raise Exception("Filename '" + fname + "' doesn't match expected pattern") | |
| 24 pid = match.groups(0)[0] | |
| 25 pname = match.groups(0)[1] | |
| 26 | |
| 27 fp = open(fname, "r") | |
| 28 fileData = json.load(fp) | |
| 29 fp.close() | |
| 30 | |
| 31 if meta is None: | |
| 32 meta = fileData['profileJSON']['meta'].copy() | |
| 33 libs = fileData['profileJSON']['libs'] | |
| 34 minStartTime = meta['startTime'] | |
| 35 else: | |
| 36 minStartTime = min(minStartTime, fileData['profileJSON']['meta']['startTime']) | |
| 37 meta['startTime'] = minStartTime | |
| 38 | |
| 39 for thread in fileData['profileJSON']['threads']: | |
| 40 thread['name'] = thread['name'] + " (" + pname + ":" + pid + ")" | |
| 41 threads.append(thread) | |
| 42 | |
| 43 # Note that pid + sym, pid + location could be ambigious | |
| 44 # if we had pid=11 sym=1 && pid=1 sym=11. | |
| 45 pidStr = pid + ":" | |
| 46 | |
| 47 thread['startTime'] = fileData['profileJSON']['meta']['startTime'] | |
| 48 samples = thread['samples'] | |
| 49 for sample in thread['samples']: | |
| 50 for frame in sample['frames']: | |
| 51 if "location" in frame and frame['location'][0:2] == '0x': | |
| 52 oldLoc = frame['location'] | |
| 53 newLoc = pidStr + oldLoc | |
| 54 frame['location'] = newLoc | |
| 55 # Default to the unprefixed symbol if no translation is available | |
| 56 symTable[newLoc] = oldLoc | |
| 57 | |
| 58 filesyms = fileData['symbolicationTable'] | |
| 59 for sym in filesyms.keys(): | |
| 60 symTable[pidStr + sym] = filesyms[sym] | |
| 61 | |
| 62 # For each thread, make the time offsets line up based on the | |
| 63 # earliest start | |
| 64 for thread in threads: | |
| 65 delta = thread['startTime'] - minStartTime | |
| 66 for sample in thread['samples']: | |
| 67 if "time" in sample: | |
| 68 sample['time'] += delta | |
| 69 | |
| 70 result = dict() | |
| 71 result['profileJSON'] = dict() | |
| 72 result['profileJSON']['meta'] = meta | |
| 73 result['profileJSON']['libs'] = libs | |
| 74 result['profileJSON']['threads'] = threads | |
| 75 result['symbolicationTable'] = symTable | |
| 76 result['format'] = "profileJSONWithSymbolicationTable,1" | |
| 77 | |
| 78 json.dump(result, sys.stdout) | |
| 79 | |
| 80 | |
| 81 if len(sys.argv) > 1: | |
| 82 MergeProfiles(sys.argv[1:]) | |
| 83 sys.exit(0) | |
| 84 | |
| 85 print "Usage: merge-profile.py profile_<pid1>_<pname1>.sym profile_<pid2>_<pname2>.sym > merged.sym" | |
| 86 | |
| 87 | |
| 88 |
