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| 17 | from __future__ import print_function
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| 18 | import sys
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| 19 | import os
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| 20 | import io
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| 21 | import argparse
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| 22 | import json
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| 23 |
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| 24 |
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| 25 | class Node:
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| 26 | def __init__(self, name, libtype=""):
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| 27 | self.name = name
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| 28 | self.libtype = libtype
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| 29 | self.value = 0
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| 30 | self.children = []
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| 31 |
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| 32 | def toJSON(self):
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| 33 | return {
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| 34 | "n": self.name,
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| 35 | "l": self.libtype,
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| 36 | "v": self.value,
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| 37 | "c": self.children
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| 38 | }
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| 39 |
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| 40 |
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| 41 | class FlameGraphCLI:
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| 42 | def __init__(self, args):
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| 43 | self.args = args
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| 44 | self.stack = Node("root")
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| 45 |
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| 46 | if self.args.format == "html" and \
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| 47 | not os.path.isfile(self.args.template):
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| 48 | print("Flame Graph template {} does not exist. Please install "
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| 49 | "the js-d3-flame-graph (RPM) or libjs-d3-flame-graph (deb) "
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| 50 | "package, specify an existing flame graph template "
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| 51 | "(--template PATH) or another output format "
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| 52 | "(--format FORMAT).".format(self.args.template),
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| 53 | file=sys.stderr)
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| 54 | sys.exit(1)
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| 55 |
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| 56 | def find_or_create_node(self, node, name, dso):
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| 57 | libtype = "kernel" if dso == "[kernel.kallsyms]" else ""
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| 58 | if name is None:
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| 59 | name = "[unknown]"
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| 60 |
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| 61 | for child in node.children:
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| 62 | if child.name == name and child.libtype == libtype:
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| 63 | return child
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| 64 |
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| 65 | child = Node(name, libtype)
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| 66 | node.children.append(child)
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| 67 | return child
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| 68 |
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| 69 | def process_event(self, event):
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| 70 | node = self.find_or_create_node(self.stack, event["comm"], None)
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| 71 | if "callchain" in event:
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| 72 | for entry in reversed(event['callchain']):
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| 73 | node = self.find_or_create_node(
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| 74 | node, entry.get("sym", {}).get("name"), event.get("dso"))
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| 75 | else:
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| 76 | node = self.find_or_create_node(
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| 77 | node, entry.get("symbol"), event.get("dso"))
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| 78 | node.value += 1
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| 79 |
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| 80 | def trace_end(self):
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| 81 | json_str = json.dumps(self.stack, default=lambda x: x.toJSON())
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| 82 |
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| 83 | if self.args.format == "html":
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| 84 | try:
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| 85 | with io.open(self.args.template, encoding="utf-8") as f:
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| 86 | output_str = f.read().replace("/** @flamegraph_json **/",
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| 87 | json_str)
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| 88 | except IOError as e:
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| 89 | print("Error reading template file: {}".format(e), file=sys.stderr)
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| 90 | sys.exit(1)
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| 91 | output_fn = self.args.output or "flamegraph.html"
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| 92 | else:
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| 93 | output_str = json_str
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| 94 | output_fn = self.args.output or "stacks.json"
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| 95 |
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| 96 | if output_fn == "-":
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| 97 | with io.open(sys.stdout.fileno(), "w", encoding="utf-8", closefd=False) as out:
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| 98 | out.write(output_str)
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| 99 | else:
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| 100 | print("dumping data to {}".format(output_fn))
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| 101 | try:
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| 102 | with io.open(output_fn, "w", encoding="utf-8") as out:
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| 103 | out.write(output_str)
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| 104 | except IOError as e:
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| 105 | print("Error writing output file: {}".format(e), file=sys.stderr)
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| 106 | sys.exit(1)
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| 107 |
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| 108 |
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| 109 | if __name__ == "__main__":
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| 110 | parser = argparse.ArgumentParser(description="Create flame graphs.")
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| 111 | parser.add_argument("-f", "--format",
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| 112 | default="html", choices=["json", "html"],
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| 113 | help="output file format")
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| 114 | parser.add_argument("-o", "--output",
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| 115 | help="output file name")
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| 116 | parser.add_argument("--template",
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| 117 | default="/usr/share/d3-flame-graph/d3-flamegraph-base.html",
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| 118 | help="path to flamegraph HTML template")
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| 119 | parser.add_argument("-i", "--input",
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| 120 | help=argparse.SUPPRESS)
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| 121 |
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| 122 | args = parser.parse_args()
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| 123 | cli = FlameGraphCLI(args)
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| 124 |
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| 125 | process_event = cli.process_event
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| 126 | trace_end = cli.trace_end
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