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#!/usr/bin/python3
#
# Copyright 2019, The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Usage: mkflame.py <jvmti_trace_file>
"""
import sys
table = {}
def add_definition_to_table(line):
"""
Adds line to the list of definitions in table.
"""
comma_pos = line.find(",")
index = int(line[1:comma_pos])
definition = line[comma_pos+1:]
if line[0:1] == "=":
# Skip the type/size prefix for flame graphs.
semi_pos = definition.find(";")
definition = definition[semi_pos + 1:]
# Expand stack frame definitions to be a semicolon-separated list of stack
# frame methods.
expanded_definition = ""
while definition != "":
semi_pos = definition.find(";")
if semi_pos == -1:
method_index = int(definition)
definition = ""
else:
method_index = int(definition[:semi_pos])
definition = definition[semi_pos + 1:]
# Replace semicolons by colons in the method entry signatures.
method = lookup_definition(method_index).replace(";", ":")
expanded_definition += ";" + method
definition = expanded_definition
table[index] = definition
def lookup_definition(index):
"""
Returns the definition for "index" from table.
"""
return table[index]
traces = {}
def record_stack_trace(string):
"""
Remembers one stack trace index in the list of stack traces we have seen.
Remembering a stack trace increments a count associated with the trace.
"""
index = int(string)
if index in traces:
count = traces[index]
traces[index] = count + 1
else:
traces[index] = 1
def main(argv):
filename = argv[1]
pagefile = open(filename, "r")
current_allocation_trace = ""
for line in pagefile:
args = line.split()
line = line.rstrip("\n")
if line[0:1] == "=" or line[0:1] == "+":
# definition.
add_definition_to_table(line)
else:
# stack trace.
record_stack_trace(line)
# Dump all the traces, with count.
for k, v in traces.items():
print(lookup_definition(k) + " " + str(v))
if __name__ == '__main__':
sys.exit(main(sys.argv))
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