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+#!/usr/bin/env python3
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+
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+# Print the percentage of instructions spent in each phase of QEMU
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+# execution.
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+#
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+# Syntax:
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+# dissect.py [-h] -- <qemu executable> [<qemu executable options>] \
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+# <target executable> [<target executable options>]
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+#
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+# [-h] - Print the script arguments help message.
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+#
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+# Example of usage:
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+# dissect.py -- qemu-arm coulomb_double-arm
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+#
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+# This file is a part of the project "TCG Continuous Benchmarking".
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+#
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+# Copyright (C) 2020 Ahmed Karaman <ahmedkhaledkaraman@gmail.com>
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+# Copyright (C) 2020 Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
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+#
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+# This program is free software: you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation, either version 2 of the License, or
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+# (at your option) any later version.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with this program. If not, see <https://www.gnu.org/licenses/>.
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+
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+import argparse
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+import os
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+import subprocess
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+import sys
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+import tempfile
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+
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+
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+def get_JIT_line(callgrind_data):
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+ """
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+ Search for the first instance of the JIT call in
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+ the callgrind_annotate output when ran using --tree=caller
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+ This is equivalent to the self number of instructions of JIT.
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+
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+ Parameters:
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+ callgrind_data (list): callgrind_annotate output
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+
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+ Returns:
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+ (int): Line number
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+ """
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+ line = -1
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+ for i in range(len(callgrind_data)):
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+ if callgrind_data[i].strip('\n') and \
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+ callgrind_data[i].split()[-1] == "[???]":
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+ line = i
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+ break
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+ if line == -1:
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+ sys.exit("Couldn't locate the JIT call ... Exiting.")
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+ return line
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+
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+
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+def main():
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+ # Parse the command line arguments
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+ parser = argparse.ArgumentParser(
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+ usage='dissect.py [-h] -- '
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+ '<qemu executable> [<qemu executable options>] '
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+ '<target executable> [<target executable options>]')
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+
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+ parser.add_argument('command', type=str, nargs='+', help=argparse.SUPPRESS)
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+
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+ args = parser.parse_args()
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+
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+ # Extract the needed variables from the args
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+ command = args.command
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+
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+ # Insure that valgrind is installed
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+ check_valgrind = subprocess.run(
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+ ["which", "valgrind"], stdout=subprocess.DEVNULL)
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+ if check_valgrind.returncode:
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+ sys.exit("Please install valgrind before running the script.")
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+
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+ # Save all intermediate files in a temporary directory
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+ with tempfile.TemporaryDirectory() as tmpdirname:
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+ # callgrind output file path
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+ data_path = os.path.join(tmpdirname, "callgrind.data")
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+ # callgrind_annotate output file path
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+ annotate_out_path = os.path.join(tmpdirname, "callgrind_annotate.out")
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+
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+ # Run callgrind
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+ callgrind = subprocess.run((["valgrind",
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+ "--tool=callgrind",
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+ "--callgrind-out-file=" + data_path]
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+ + command),
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+ stdout=subprocess.DEVNULL,
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+ stderr=subprocess.PIPE)
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+ if callgrind.returncode:
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+ sys.exit(callgrind.stderr.decode("utf-8"))
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+
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+ # Save callgrind_annotate output
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+ with open(annotate_out_path, "w") as output:
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+ callgrind_annotate = subprocess.run(
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+ ["callgrind_annotate", data_path, "--tree=caller"],
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+ stdout=output,
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+ stderr=subprocess.PIPE)
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+ if callgrind_annotate.returncode:
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+ sys.exit(callgrind_annotate.stderr.decode("utf-8"))
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+
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+ # Read the callgrind_annotate output to callgrind_data[]
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+ callgrind_data = []
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+ with open(annotate_out_path, 'r') as data:
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+ callgrind_data = data.readlines()
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+
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+ # Line number with the total number of instructions
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+ total_instructions_line_number = 20
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+ # Get the total number of instructions
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+ total_instructions_line_data = \
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+ callgrind_data[total_instructions_line_number]
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+ total_instructions = total_instructions_line_data.split()[0]
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+ total_instructions = int(total_instructions.replace(',', ''))
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+
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+ # Line number with the JIT self number of instructions
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+ JIT_self_instructions_line_number = get_JIT_line(callgrind_data)
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+ # Get the JIT self number of instructions
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+ JIT_self_instructions_line_data = \
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+ callgrind_data[JIT_self_instructions_line_number]
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+ JIT_self_instructions = JIT_self_instructions_line_data.split()[0]
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+ JIT_self_instructions = int(JIT_self_instructions.replace(',', ''))
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+
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+ # Line number with the JIT self + inclusive number of instructions
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+ # It's the line above the first JIT call when running with --tree=caller
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+ JIT_total_instructions_line_number = JIT_self_instructions_line_number-1
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+ # Get the JIT self + inclusive number of instructions
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+ JIT_total_instructions_line_data = \
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+ callgrind_data[JIT_total_instructions_line_number]
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+ JIT_total_instructions = JIT_total_instructions_line_data.split()[0]
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+ JIT_total_instructions = int(JIT_total_instructions.replace(',', ''))
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+
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+ # Calculate number of instructions in helpers and code generation
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+ helpers_instructions = JIT_total_instructions-JIT_self_instructions
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+ code_generation_instructions = total_instructions-JIT_total_instructions
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+
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+ # Print results (Insert commas in large numbers)
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+ # Print total number of instructions
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+ print('{:<20}{:>20}\n'.
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+ format("Total Instructions:",
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+ format(total_instructions, ',')))
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+ # Print code generation instructions and percentage
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+ print('{:<20}{:>20}\t{:>6.3f}%'.
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+ format("Code Generation:",
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+ format(code_generation_instructions, ","),
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+ (code_generation_instructions / total_instructions) * 100))
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+ # Print JIT instructions and percentage
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+ print('{:<20}{:>20}\t{:>6.3f}%'.
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+ format("JIT Execution:",
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+ format(JIT_self_instructions, ","),
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+ (JIT_self_instructions / total_instructions) * 100))
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+ # Print helpers instructions and percentage
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+ print('{:<20}{:>20}\t{:>6.3f}%'.
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+ format("Helpers:",
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+ format(helpers_instructions, ","),
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+ (helpers_instructions/total_instructions)*100))
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+
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+
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+if __name__ == "__main__":
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+ main()
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