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86 lines
2.7 KiB
Python
Executable File
86 lines
2.7 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# This script takes b2g process profiles and merged them into a single profile.
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# The meta data is taken from the first profile. The startTime for each profile
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# is used to syncronized the samples. Each thread is moved into the merged
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# profile.
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#
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import json
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import re
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import sys
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def MergeProfiles(files):
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threads = []
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fileData = []
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symTable = dict()
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meta = None
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libs = None
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minStartTime = None
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for fname in files:
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match = re.match('profile_([0-9]+)_(.+)\.sym', fname)
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if match is None:
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raise Exception("Filename '" + fname + "' doesn't match expected pattern")
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pid = match.groups(0)[0]
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pname = match.groups(0)[1]
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fp = open(fname, "r")
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fileData = json.load(fp)
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fp.close()
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if meta is None:
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meta = fileData['profileJSON']['meta'].copy()
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libs = fileData['profileJSON']['libs']
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minStartTime = meta['startTime']
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else:
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minStartTime = min(minStartTime, fileData['profileJSON']['meta']['startTime'])
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meta['startTime'] = minStartTime
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for thread in fileData['profileJSON']['threads']:
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thread['name'] = thread['name'] + " (" + pname + ":" + pid + ")"
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threads.append(thread)
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# Note that pid + sym, pid + location could be ambigious
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# if we had pid=11 sym=1 && pid=1 sym=11. To avoid this we format
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# pidStr with leading zeros.
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pidStr = "%05d" % (int(pid))
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thread['startTime'] = fileData['profileJSON']['meta']['startTime']
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samples = thread['samples']
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for sample in thread['samples']:
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for frame in sample['frames']:
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if "location" in frame and frame['location'][0:2] == '0x':
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frame['location'] = pidStr + frame['location']
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filesyms = fileData['symbolicationTable']
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for sym in filesyms.keys():
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symTable[pidStr + sym] = filesyms[sym]
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# For each thread, make the time offsets line up based on the
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# earliest start
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for thread in threads:
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delta = thread['startTime'] - minStartTime
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for sample in thread['samples']:
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if "time" in sample:
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sample['time'] += delta
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result = dict()
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result['profileJSON'] = dict()
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result['profileJSON']['meta'] = meta
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result['profileJSON']['libs'] = libs
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result['profileJSON']['threads'] = threads
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result['symbolicationTable'] = symTable
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result['format'] = "profileJSONWithSymbolicationTable,1"
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json.dump(result, sys.stdout)
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if len(sys.argv) > 1:
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MergeProfiles(sys.argv[1:])
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sys.exit(0)
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print "Usage: merge-profile.py profile_<pid1>_<pname1>.sym profile_<pid2>_<pname2>.sym > merged.sym"
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