1013 lines
31 KiB
Python
Executable File
1013 lines
31 KiB
Python
Executable File
#!/usr/bin/env python3
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import sys
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import re
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import os
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import ast
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import argparse
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import subprocess
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import difflib
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import string
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import itertools
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import threading
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import queue
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import time
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def fail(msg):
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print(msg, file=sys.stderr)
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sys.exit(1)
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MISSING_PREREQUISITES = (
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"Missing prerequisite python module {}. "
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"Run `python3 -m pip install --user colorama ansiwrap attrs watchdog python-Levenshtein` to install prerequisites (python-Levenshtein only needed for --algorithm=levenshtein)."
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)
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try:
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import attr
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from colorama import Fore, Style, Back
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import ansiwrap
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import watchdog
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except ModuleNotFoundError as e:
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fail(MISSING_PREREQUISITES.format(e.name))
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# Prefer to use diff_settings.py from the current working directory
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sys.path.insert(0, ".")
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try:
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import diff_settings
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except ModuleNotFoundError:
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fail("Unable to find diff_settings.py in the same directory.")
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# ==== CONFIG ====
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parser = argparse.ArgumentParser(description="Diff MIPS assembly.")
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parser.add_argument("start", help="Function name or address to start diffing from.")
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parser.add_argument("end", nargs="?", help="Address to end diff at.")
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parser.add_argument(
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"-o",
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dest="diff_obj",
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action="store_true",
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help="Diff .o files rather than a whole binary. This makes it possible to see symbol names. (Recommended)",
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)
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parser.add_argument(
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"--base-asm",
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dest="base_asm",
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metavar="FILE",
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help="Read assembly from given file instead of configured base img.",
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)
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parser.add_argument(
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"--write-asm",
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dest="write_asm",
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metavar="FILE",
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help="Write the current assembly output to file, e.g. for use with --base-asm.",
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)
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parser.add_argument(
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"-m",
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"--make",
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dest="make",
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action="store_true",
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help="Automatically run 'make' on the .o file or binary before diffing.",
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)
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parser.add_argument(
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"-l",
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"--skip-lines",
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dest="skip_lines",
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type=int,
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default=0,
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help="Skip the first N lines of output.",
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)
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parser.add_argument(
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"-f",
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"--stop-jr-ra",
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dest="stop_jrra",
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action="store_true",
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help="Stop disassembling at the first 'jr ra'. Some functions have multiple return points, so use with care!",
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)
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parser.add_argument(
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"-i",
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"--ignore-large-imms",
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dest="ignore_large_imms",
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action="store_true",
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help="Pretend all large enough immediates are the same.",
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)
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parser.add_argument(
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"-B",
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"--no-show-branches",
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dest="show_branches",
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action="store_false",
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help="Don't visualize branches/branch targets.",
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)
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parser.add_argument(
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"-S",
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"--base-shift",
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dest="base_shift",
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type=str,
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default="0",
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help="Diff position X in our img against position X + shift in the base img. "
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'Arithmetic is allowed, so e.g. |-S "0x1234 - 0x4321"| is a reasonable '
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"flag to pass if it is known that position 0x1234 in the base img syncs "
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"up with position 0x4321 in our img. Not supported together with -o.",
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)
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parser.add_argument(
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"-w",
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"--watch",
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dest="watch",
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action="store_true",
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help="Automatically update when source/object files change. "
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"Recommended in combination with -m.",
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)
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parser.add_argument(
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"--width",
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dest="column_width",
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type=int,
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default=50,
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help="Sets the width of the left and right view column.",
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)
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parser.add_argument(
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"--algorithm",
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dest="algorithm",
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default="difflib",
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choices=["levenshtein", "difflib"],
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help="Diff algorithm to use.",
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)
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parser.add_argument(
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"--max-size",
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"--max-lines",
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dest="max_lines",
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type=int,
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default=1024,
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help="The maximum length of the diff, in lines. Not recommended when -f is used.",
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)
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# Project-specific flags, e.g. different versions/make arguments.
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if hasattr(diff_settings, "add_custom_arguments"):
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diff_settings.add_custom_arguments(parser)
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args = parser.parse_args()
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# Set imgs, map file and make flags in a project-specific manner.
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config = {}
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diff_settings.apply(config, args)
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baseimg = config.get("baseimg", None)
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myimg = config.get("myimg", None)
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mapfile = config.get("mapfile", None)
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makeflags = config.get("makeflags", [])
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source_directories = config.get("source_directories", None)
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MAX_FUNCTION_SIZE_LINES = args.max_lines
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MAX_FUNCTION_SIZE_BYTES = MAX_FUNCTION_SIZE_LINES * 4
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COLOR_ROTATION = [
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Fore.MAGENTA,
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Fore.CYAN,
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Fore.GREEN,
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Fore.RED,
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Fore.LIGHTYELLOW_EX,
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Fore.LIGHTMAGENTA_EX,
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Fore.LIGHTCYAN_EX,
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Fore.LIGHTGREEN_EX,
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Fore.LIGHTBLACK_EX,
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]
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BUFFER_CMD = ["tail", "-c", str(10 ** 9)]
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LESS_CMD = ["less", "-Ric"]
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DEBOUNCE_DELAY = 0.1
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FS_WATCH_EXTENSIONS = [".c", ".h"]
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# ==== LOGIC ====
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if args.algorithm == "levenshtein":
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try:
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import Levenshtein
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except ModuleNotFoundError as e:
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fail(MISSING_PREREQUISITES.format(e.name))
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binutils_prefix = None
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for binutils_cand in ["mips-linux-gnu-", "mips64-elf-"]:
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try:
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subprocess.check_call(
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[binutils_cand + "objdump", "--version"],
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stdout=subprocess.DEVNULL,
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stderr=subprocess.DEVNULL,
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)
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binutils_prefix = binutils_cand
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break
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except subprocess.CalledProcessError:
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pass
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except FileNotFoundError:
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pass
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if not binutils_prefix:
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fail(
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"Missing binutils; please ensure mips-linux-gnu-objdump or mips64-elf-objdump exist."
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)
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def eval_int(expr, emsg=None):
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try:
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ret = ast.literal_eval(expr)
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if not isinstance(ret, int):
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raise Exception("not an integer")
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return ret
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except Exception:
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if emsg is not None:
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fail(emsg)
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return None
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def run_make(target, capture_output=False):
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if capture_output:
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return subprocess.run(
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["make"] + makeflags + [target],
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stderr=subprocess.PIPE,
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stdout=subprocess.PIPE,
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)
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else:
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subprocess.check_call(["make"] + makeflags + [target])
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def restrict_to_function(dump, fn_name):
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out = []
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search = f"<{fn_name}>:"
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found = False
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for line in dump.split("\n"):
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if found:
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if len(out) >= MAX_FUNCTION_SIZE_LINES:
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break
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out.append(line)
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elif search in line:
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found = True
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return "\n".join(out)
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def run_objdump(cmd):
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flags, target, restrict = cmd
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out = subprocess.check_output(
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[binutils_prefix + "objdump"] + flags + [target], universal_newlines=True
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)
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if restrict is not None:
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return restrict_to_function(out, restrict)
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return out
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base_shift = eval_int(
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args.base_shift, "Failed to parse --base-shift (-S) argument as an integer."
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)
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def search_map_file(fn_name):
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if not mapfile:
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fail(f"No map file configured; cannot find function {fn_name}.")
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try:
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with open(mapfile) as f:
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lines = f.read().split("\n")
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except Exception:
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fail(f"Failed to open map file {mapfile} for reading.")
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try:
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cur_objfile = None
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ram_to_rom = None
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cands = []
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last_line = ""
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for line in lines:
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if line.startswith(" .text"):
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cur_objfile = line.split()[3]
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if "load address" in line:
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tokens = last_line.split() + line.split()
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ram = int(tokens[1], 0)
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rom = int(tokens[5], 0)
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ram_to_rom = rom - ram
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if line.endswith(" " + fn_name):
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ram = int(line.split()[0], 0)
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if cur_objfile is not None and ram_to_rom is not None:
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cands.append((cur_objfile, ram + ram_to_rom))
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last_line = line
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except Exception as e:
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import traceback
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traceback.print_exc()
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fail(f"Internal error while parsing map file")
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if len(cands) > 1:
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fail(f"Found multiple occurrences of function {fn_name} in map file.")
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if len(cands) == 1:
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return cands[0]
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return None, None
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def dump_objfile():
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if base_shift:
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fail("--base-shift not compatible with -o")
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if args.end is not None:
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fail("end address not supported together with -o")
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if args.start.startswith("0"):
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fail("numerical start address not supported with -o; pass a function name")
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objfile, _ = search_map_file(args.start)
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if not objfile:
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fail("Not able to find .o file for function.")
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if args.make:
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run_make(objfile)
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if not os.path.isfile(objfile):
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fail(f"Not able to find .o file for function: {objfile} is not a file.")
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refobjfile = "expected/" + objfile
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if not os.path.isfile(refobjfile):
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fail(f'Please ensure an OK .o file exists at "{refobjfile}".')
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objdump_flags = ["-drz"]
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return (
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objfile,
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(objdump_flags, refobjfile, args.start),
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(objdump_flags, objfile, args.start),
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)
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def dump_binary():
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if not baseimg or not myimg:
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fail("Missing myimg/baseimg in config.")
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if args.make:
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run_make(myimg)
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start_addr = eval_int(args.start)
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if start_addr is None:
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_, start_addr = search_map_file(args.start)
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if start_addr is None:
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fail("Not able to find function in map file.")
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if args.end is not None:
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end_addr = eval_int(args.end, "End address must be an integer expression.")
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else:
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end_addr = start_addr + MAX_FUNCTION_SIZE_BYTES
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objdump_flags = ["-Dz", "-bbinary", "-mmips", "-EB"]
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flags1 = [
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f"--start-address={start_addr + base_shift}",
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f"--stop-address={end_addr + base_shift}",
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]
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flags2 = [f"--start-address={start_addr}", f"--stop-address={end_addr}"]
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return (
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myimg,
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(objdump_flags + flags1, baseimg, None),
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(objdump_flags + flags2, myimg, None),
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)
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# Alignment with ANSI colors is broken, let's fix it.
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def ansi_ljust(s, width):
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needed = width - ansiwrap.ansilen(s)
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if needed > 0:
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return s + " " * needed
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else:
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return s
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re_int = re.compile(r"[0-9]+")
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re_comments = re.compile(r"<.*?>")
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re_regs = re.compile(r"\$?\b(a[0-3]|t[0-9]|s[0-8]|at|v[01]|f[12]?[0-9]|f3[01]|fp)\b")
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re_sprel = re.compile(r",([0-9]+|0x[0-9a-f]+)\(sp\)")
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re_large_imm = re.compile(r"-?[1-9][0-9]{2,}|-?0x[0-9a-f]{3,}")
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re_imm = re.compile(r"(\b|-)([0-9]+|0x[0-9a-fA-F]+)\b(?!\(sp)|%(lo|hi)\([^)]*\)")
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forbidden = set(string.ascii_letters + "_")
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branch_likely_instructions = {
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"beql",
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"bnel",
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"beqzl",
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"bnezl",
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"bgezl",
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"bgtzl",
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"blezl",
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"bltzl",
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"bc1tl",
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"bc1fl",
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}
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branch_instructions = branch_likely_instructions.union(
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{"b", "beq", "bne", "beqz", "bnez", "bgez", "bgtz", "blez", "bltz", "bc1t", "bc1f"}
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)
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jump_instructions = branch_instructions.union({"jal", "j"})
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def hexify_int(row, pat):
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full = pat.group(0)
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if len(full) <= 1:
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# leave one-digit ints alone
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return full
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start, end = pat.span()
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if start and row[start - 1] in forbidden:
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return full
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if end < len(row) and row[end] in forbidden:
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return full
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return hex(int(full))
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def parse_relocated_line(line):
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try:
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ind2 = line.rindex(",")
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except ValueError:
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ind2 = line.rindex("\t")
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before = line[: ind2 + 1]
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after = line[ind2 + 1 :]
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ind2 = after.find("(")
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if ind2 == -1:
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imm, after = after, ""
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else:
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imm, after = after[:ind2], after[ind2:]
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if imm == "0x0":
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imm = "0"
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return before, imm, after
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def process_reloc(row, prev):
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before, imm, after = parse_relocated_line(prev)
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repl = row.split()[-1]
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if imm != "0":
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if before.strip() == "jal" and not imm.startswith("0x"):
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imm = "0x" + imm
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repl += "+" + imm if int(imm, 0) > 0 else imm
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if "R_MIPS_LO16" in row:
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repl = f"%lo({repl})"
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elif "R_MIPS_HI16" in row:
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# Ideally we'd pair up R_MIPS_LO16 and R_MIPS_HI16 to generate a
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# correct addend for each, but objdump doesn't give us the order of
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# the relocations, so we can't find the right LO16. :(
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repl = f"%hi({repl})"
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else:
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assert "R_MIPS_26" in row, f"unknown relocation type '{row}'"
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return before + repl + after
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|
|
|
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def process(lines):
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mnemonics = []
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diff_rows = []
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rows_with_imms = []
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skip_next = False
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originals = []
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line_nums = []
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branch_targets = []
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if not args.diff_obj:
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lines = lines[7:]
|
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if lines and not lines[-1]:
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lines.pop()
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|
|
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for row in lines:
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|
if args.diff_obj and (">:" in row or not row):
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continue
|
|
|
|
if "R_MIPS_" in row:
|
|
# N.B. Don't transform the diff rows, they already ignore immediates
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|
# if diff_rows[-1] != '<delay-slot>':
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# diff_rows[-1] = process_reloc(row, rows_with_imms[-1])
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originals[-1] = process_reloc(row, originals[-1])
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continue
|
|
|
|
row = re.sub(re_comments, "", row)
|
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row = row.rstrip()
|
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tabs = row.split("\t")
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row = "\t".join(tabs[2:])
|
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line_num = tabs[0].strip()
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row_parts = row.split("\t", 1)
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mnemonic = row_parts[0].strip()
|
|
if mnemonic not in jump_instructions:
|
|
row = re.sub(re_int, lambda s: hexify_int(row, s), row)
|
|
original = row
|
|
if skip_next:
|
|
skip_next = False
|
|
row = "<delay-slot>"
|
|
mnemonic = "<delay-slot>"
|
|
if mnemonic in branch_likely_instructions:
|
|
skip_next = True
|
|
row = re.sub(re_regs, "<reg>", row)
|
|
row = re.sub(re_sprel, ",addr(sp)", row)
|
|
row_with_imm = row
|
|
if mnemonic in jump_instructions:
|
|
row = row.strip()
|
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row, _ = split_off_branch(row)
|
|
row += "<imm>"
|
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else:
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row = re.sub(re_imm, "<imm>", row)
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mnemonics.append(mnemonic)
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rows_with_imms.append(row_with_imm)
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diff_rows.append(row)
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originals.append(original)
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|
line_nums.append(line_num)
|
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if mnemonic in branch_instructions:
|
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target = row_parts[1].strip().split(",")[-1]
|
|
if mnemonic in branch_likely_instructions:
|
|
target = hex(int(target, 16) - 4)[2:]
|
|
branch_targets.append(target)
|
|
else:
|
|
branch_targets.append(None)
|
|
if args.stop_jrra and mnemonic == "jr" and row_parts[1].strip() == "ra":
|
|
break
|
|
|
|
# Cleanup whitespace
|
|
originals = [original.strip() for original in originals]
|
|
originals = [
|
|
"".join(f"{o:<8s}" for o in original.split("\t")) for original in originals
|
|
]
|
|
# return diff_rows, diff_rows, line_nums
|
|
return mnemonics, diff_rows, originals, line_nums, branch_targets
|
|
|
|
|
|
def format_single_line_diff(line1, line2, column_width):
|
|
return f"{ansi_ljust(line1,column_width)}{ansi_ljust(line2,column_width)}"
|
|
|
|
|
|
class SymbolColorer:
|
|
def __init__(self, base_index):
|
|
self.color_index = base_index
|
|
self.symbol_colors = {}
|
|
|
|
def color_symbol(self, s, t=None):
|
|
try:
|
|
color = self.symbol_colors[s]
|
|
except:
|
|
color = COLOR_ROTATION[self.color_index % len(COLOR_ROTATION)]
|
|
self.color_index += 1
|
|
self.symbol_colors[s] = color
|
|
t = t or s
|
|
return f"{color}{t}{Fore.RESET}"
|
|
|
|
|
|
def maybe_normalize_large_imms(row):
|
|
if args.ignore_large_imms:
|
|
row = re.sub(re_large_imm, "<imm>", row)
|
|
return row
|
|
|
|
|
|
def normalize_imms(row):
|
|
return re.sub(re_imm, "<imm>", row)
|
|
|
|
|
|
def normalize_stack(row):
|
|
return re.sub(re_sprel, ",addr(sp)", row)
|
|
|
|
|
|
def split_off_branch(line):
|
|
parts = line.split(",")
|
|
if len(parts) < 2:
|
|
parts = line.split(None, 1)
|
|
off = len(line) - len(parts[-1])
|
|
return line[:off], line[off:]
|
|
|
|
|
|
def color_imms(out1, out2):
|
|
g1 = []
|
|
g2 = []
|
|
re.sub(re_imm, lambda s: g1.append(s.group()), out1)
|
|
re.sub(re_imm, lambda s: g2.append(s.group()), out2)
|
|
if len(g1) == len(g2):
|
|
diffs = [x != y for (x, y) in zip(g1, g2)]
|
|
it = iter(diffs)
|
|
|
|
def maybe_color(s):
|
|
return f"{Fore.LIGHTBLUE_EX}{s}{Style.RESET_ALL}" if next(it) else s
|
|
|
|
out1 = re.sub(re_imm, lambda s: maybe_color(s.group()), out1)
|
|
it = iter(diffs)
|
|
out2 = re.sub(re_imm, lambda s: maybe_color(s.group()), out2)
|
|
return out1, out2
|
|
|
|
|
|
def color_branch_imms(br1, br2):
|
|
if br1 != br2:
|
|
br1 = f"{Fore.LIGHTBLUE_EX}{br1}{Style.RESET_ALL}"
|
|
br2 = f"{Fore.LIGHTBLUE_EX}{br2}{Style.RESET_ALL}"
|
|
return br1, br2
|
|
|
|
|
|
def diff_sequences_difflib(seq1, seq2):
|
|
differ = difflib.SequenceMatcher(a=seq1, b=seq2, autojunk=False)
|
|
return differ.get_opcodes()
|
|
|
|
|
|
def diff_sequences(seq1, seq2):
|
|
if (
|
|
args.algorithm != "levenshtein"
|
|
or len(seq1) * len(seq2) > 4 * 10 ** 8
|
|
or len(seq1) + len(seq2) >= 0x110000
|
|
):
|
|
return diff_sequences_difflib(seq1, seq2)
|
|
|
|
# The Levenshtein library assumes that we compare strings, not lists. Convert.
|
|
# (Per the check above we know we have fewer than 0x110000 unique elements, so chr() works.)
|
|
remapping = {}
|
|
|
|
def remap(seq):
|
|
seq = seq[:]
|
|
for i in range(len(seq)):
|
|
val = remapping.get(seq[i])
|
|
if val is None:
|
|
val = chr(len(remapping))
|
|
remapping[seq[i]] = val
|
|
seq[i] = val
|
|
return "".join(seq)
|
|
|
|
seq1 = remap(seq1)
|
|
seq2 = remap(seq2)
|
|
return Levenshtein.opcodes(seq1, seq2)
|
|
|
|
|
|
def do_diff(basedump, mydump):
|
|
asm_lines1 = basedump.split("\n")
|
|
asm_lines2 = mydump.split("\n")
|
|
|
|
output = []
|
|
|
|
# TODO: status line?
|
|
# output.append(sha1sum(mydump))
|
|
|
|
mnemonics1, asm_lines1, originals1, line_nums1, branch_targets1 = process(
|
|
asm_lines1
|
|
)
|
|
mnemonics2, asm_lines2, originals2, line_nums2, branch_targets2 = process(
|
|
asm_lines2
|
|
)
|
|
|
|
sc1 = SymbolColorer(0)
|
|
sc2 = SymbolColorer(0)
|
|
sc3 = SymbolColorer(4)
|
|
sc4 = SymbolColorer(4)
|
|
sc5 = SymbolColorer(0)
|
|
sc6 = SymbolColorer(0)
|
|
bts1 = set()
|
|
bts2 = set()
|
|
|
|
if args.show_branches:
|
|
for (bts, btset, sc) in [
|
|
(branch_targets1, bts1, sc5),
|
|
(branch_targets2, bts2, sc6),
|
|
]:
|
|
for bt in bts:
|
|
if bt is not None:
|
|
btset.add(bt + ":")
|
|
sc.color_symbol(bt + ":")
|
|
|
|
for (tag, i1, i2, j1, j2) in diff_sequences(mnemonics1, mnemonics2):
|
|
lines1 = asm_lines1[i1:i2]
|
|
lines2 = asm_lines2[j1:j2]
|
|
|
|
for k, (line1, line2) in enumerate(itertools.zip_longest(lines1, lines2)):
|
|
if tag == "replace":
|
|
if line1 is None:
|
|
tag = "insert"
|
|
elif line2 is None:
|
|
tag = "delete"
|
|
|
|
try:
|
|
original1 = originals1[i1 + k]
|
|
line_num1 = line_nums1[i1 + k]
|
|
except:
|
|
original1 = ""
|
|
line_num1 = ""
|
|
try:
|
|
original2 = originals2[j1 + k]
|
|
line_num2 = line_nums2[j1 + k]
|
|
except:
|
|
original2 = ""
|
|
line_num2 = ""
|
|
|
|
has1 = has2 = True
|
|
line_color1 = line_color2 = sym_color = Fore.RESET
|
|
line_prefix = " "
|
|
if line1 == line2:
|
|
if not line1:
|
|
has1 = has2 = False
|
|
if maybe_normalize_large_imms(original1) == maybe_normalize_large_imms(
|
|
original2
|
|
):
|
|
out1 = original1
|
|
out2 = original2
|
|
elif line1 == "<delay-slot>":
|
|
out1 = f"{Style.DIM}{original1}"
|
|
out2 = f"{Style.DIM}{original2}"
|
|
else:
|
|
mnemonic = original1.split()[0]
|
|
out1, out2 = original1, original2
|
|
branch1 = branch2 = ""
|
|
if mnemonic in jump_instructions:
|
|
out1, branch1 = split_off_branch(original1)
|
|
out2, branch2 = split_off_branch(original2)
|
|
branchless1 = out1
|
|
branchless2 = out2
|
|
out1, out2 = color_imms(out1, out2)
|
|
branch1, branch2 = color_branch_imms(branch1, branch2)
|
|
out1 += branch1
|
|
out2 += branch2
|
|
if normalize_imms(branchless1) == normalize_imms(branchless2):
|
|
# only imms differences
|
|
sym_color = Fore.LIGHTBLUE_EX
|
|
line_prefix = "i"
|
|
else:
|
|
out1 = re.sub(
|
|
re_sprel,
|
|
lambda s: "," + sc3.color_symbol(s.group()[1:]),
|
|
out1,
|
|
)
|
|
out2 = re.sub(
|
|
re_sprel,
|
|
lambda s: "," + sc4.color_symbol(s.group()[1:]),
|
|
out2,
|
|
)
|
|
if normalize_stack(branchless1) == normalize_stack(branchless2):
|
|
# only stack differences (luckily stack and imm
|
|
# differences can't be combined in MIPS, so we
|
|
# don't have to think about that case)
|
|
sym_color = Fore.YELLOW
|
|
line_prefix = "s"
|
|
else:
|
|
# regs differences and maybe imms as well
|
|
out1 = re.sub(
|
|
re_regs, lambda s: sc1.color_symbol(s.group()), out1
|
|
)
|
|
out2 = re.sub(
|
|
re_regs, lambda s: sc2.color_symbol(s.group()), out2
|
|
)
|
|
line_color1 = line_color2 = sym_color = Fore.YELLOW
|
|
line_prefix = "r"
|
|
elif tag in ["replace", "equal"]:
|
|
line_prefix = "|"
|
|
line_color1 = Fore.LIGHTBLUE_EX
|
|
line_color2 = Fore.LIGHTBLUE_EX
|
|
sym_color = Fore.LIGHTBLUE_EX
|
|
out1 = original1
|
|
out2 = original2
|
|
elif tag == "delete":
|
|
line_prefix = "<"
|
|
line_color1 = line_color2 = sym_color = Fore.RED
|
|
has2 = False
|
|
out1 = original1
|
|
out2 = ""
|
|
elif tag == "insert":
|
|
line_prefix = ">"
|
|
line_color1 = line_color2 = sym_color = Fore.GREEN
|
|
has1 = False
|
|
out1 = ""
|
|
out2 = original2
|
|
|
|
in_arrow1 = " "
|
|
in_arrow2 = " "
|
|
out_arrow1 = ""
|
|
out_arrow2 = ""
|
|
line_num1 = line_num1 if has1 else ""
|
|
line_num2 = line_num2 if has2 else ""
|
|
|
|
if sym_color == line_color2:
|
|
line_color2 = ""
|
|
|
|
if args.show_branches and has1:
|
|
if line_num1 in bts1:
|
|
in_arrow1 = sc5.color_symbol(line_num1, "~>") + line_color1
|
|
if branch_targets1[i1 + k] is not None:
|
|
out_arrow1 = " " + sc5.color_symbol(
|
|
branch_targets1[i1 + k] + ":", "~>"
|
|
)
|
|
if args.show_branches and has2:
|
|
if line_num2 in bts2:
|
|
in_arrow2 = sc6.color_symbol(line_num2, "~>") + line_color2
|
|
if branch_targets2[j1 + k] is not None:
|
|
out_arrow2 = " " + sc6.color_symbol(
|
|
branch_targets2[j1 + k] + ":", "~>"
|
|
)
|
|
|
|
out1 = f"{line_color1}{line_num1} {in_arrow1} {out1}{Style.RESET_ALL}{out_arrow1}"
|
|
out2 = f"{line_color2}{line_num2} {in_arrow2} {out2}{Style.RESET_ALL}{out_arrow2}"
|
|
mid = f"{sym_color}{line_prefix} "
|
|
output.append(format_single_line_diff(out1, mid + out2, args.column_width))
|
|
|
|
return output[args.skip_lines :]
|
|
|
|
|
|
def debounced_fs_watch(targets, outq, debounce_delay):
|
|
import watchdog.events
|
|
import watchdog.observers
|
|
|
|
class WatchEventHandler(watchdog.events.FileSystemEventHandler):
|
|
def __init__(self, queue, file_targets):
|
|
self.queue = queue
|
|
self.file_targets = file_targets
|
|
|
|
def on_modified(self, ev):
|
|
if isinstance(ev, watchdog.events.FileModifiedEvent):
|
|
self.changed(ev.src_path)
|
|
|
|
def on_moved(self, ev):
|
|
if isinstance(ev, watchdog.events.FileMovedEvent):
|
|
self.changed(ev.dest_path)
|
|
|
|
def should_notify(self, path):
|
|
for target in self.file_targets:
|
|
if path == target:
|
|
return True
|
|
if args.make and any(
|
|
path.endswith(suffix) for suffix in FS_WATCH_EXTENSIONS
|
|
):
|
|
return True
|
|
return False
|
|
|
|
def changed(self, path):
|
|
if self.should_notify(path):
|
|
self.queue.put(time.time())
|
|
|
|
def debounce_thread():
|
|
listenq = queue.Queue()
|
|
file_targets = []
|
|
event_handler = WatchEventHandler(listenq, file_targets)
|
|
observer = watchdog.observers.Observer()
|
|
observed = set()
|
|
for target in targets:
|
|
if os.path.isdir(target):
|
|
observer.schedule(event_handler, target, recursive=True)
|
|
else:
|
|
file_targets.append(target)
|
|
target = os.path.dirname(target) or "."
|
|
if target not in observed:
|
|
observed.add(target)
|
|
observer.schedule(event_handler, target)
|
|
observer.start()
|
|
while True:
|
|
t = listenq.get()
|
|
more = True
|
|
while more:
|
|
delay = t + debounce_delay - time.time()
|
|
if delay > 0:
|
|
time.sleep(delay)
|
|
# consume entire queue
|
|
more = False
|
|
try:
|
|
while True:
|
|
t = listenq.get(block=False)
|
|
more = True
|
|
except queue.Empty:
|
|
pass
|
|
outq.put(t)
|
|
|
|
th = threading.Thread(target=debounce_thread, daemon=True)
|
|
th.start()
|
|
|
|
|
|
class Display:
|
|
def __init__(self, basedump, mydump):
|
|
self.basedump = basedump
|
|
self.mydump = mydump
|
|
self.emsg = None
|
|
|
|
def run_less(self):
|
|
if self.emsg is not None:
|
|
output = self.emsg
|
|
else:
|
|
output = "\n".join(do_diff(self.basedump, self.mydump))
|
|
|
|
# Pipe the output through 'tail' and only then to less, to ensure the
|
|
# write call doesn't block. ('tail' has to buffer all its input before
|
|
# it starts writing.) This also means we don't have to deal with pipe
|
|
# closure errors.
|
|
buffer_proc = subprocess.Popen(
|
|
BUFFER_CMD, stdin=subprocess.PIPE, stdout=subprocess.PIPE
|
|
)
|
|
less_proc = subprocess.Popen(LESS_CMD, stdin=buffer_proc.stdout)
|
|
buffer_proc.stdin.write(output.encode())
|
|
buffer_proc.stdin.close()
|
|
buffer_proc.stdout.close()
|
|
return (buffer_proc, less_proc)
|
|
|
|
def run_sync(self):
|
|
proca, procb = self.run_less()
|
|
procb.wait()
|
|
proca.wait()
|
|
|
|
def run_async(self, watch_queue):
|
|
self.watch_queue = watch_queue
|
|
self.ready_queue = queue.Queue()
|
|
self.pending_update = None
|
|
dthread = threading.Thread(target=self.display_thread)
|
|
dthread.start()
|
|
self.ready_queue.get()
|
|
|
|
def display_thread(self):
|
|
proca, procb = self.run_less()
|
|
self.less_proc = procb
|
|
self.ready_queue.put(0)
|
|
while True:
|
|
ret = procb.wait()
|
|
proca.wait()
|
|
self.less_proc = None
|
|
if ret != 0:
|
|
# fix the terminal
|
|
os.system("tput reset")
|
|
if ret != 0 and self.pending_update is not None:
|
|
# killed by program with the intent to refresh
|
|
msg, error = self.pending_update
|
|
self.pending_update = None
|
|
if not error:
|
|
self.mydump = msg
|
|
self.emsg = None
|
|
else:
|
|
self.emsg = msg
|
|
proca, procb = self.run_less()
|
|
self.less_proc = procb
|
|
self.ready_queue.put(0)
|
|
else:
|
|
# terminated by user, or killed
|
|
self.watch_queue.put(None)
|
|
self.ready_queue.put(0)
|
|
break
|
|
|
|
def progress(self, msg):
|
|
# Write message to top-left corner
|
|
sys.stdout.write("\x1b7\x1b[1;1f{}\x1b8".format(msg + " "))
|
|
sys.stdout.flush()
|
|
|
|
def update(self, text, error):
|
|
if not error and not self.emsg and text == self.mydump:
|
|
self.progress("Unchanged. ")
|
|
return
|
|
self.pending_update = (text, error)
|
|
if not self.less_proc:
|
|
return
|
|
self.less_proc.kill()
|
|
self.ready_queue.get()
|
|
|
|
def terminate(self):
|
|
if not self.less_proc:
|
|
return
|
|
self.less_proc.kill()
|
|
self.ready_queue.get()
|
|
|
|
|
|
def main():
|
|
if args.diff_obj:
|
|
make_target, basecmd, mycmd = dump_objfile()
|
|
else:
|
|
make_target, basecmd, mycmd = dump_binary()
|
|
|
|
if args.write_asm is not None:
|
|
mydump = run_objdump(mycmd)
|
|
with open(args.write_asm, "w") as f:
|
|
f.write(mydump)
|
|
print(f"Wrote assembly to {args.write_asm}.")
|
|
sys.exit(0)
|
|
|
|
if args.base_asm is not None:
|
|
with open(args.base_asm) as f:
|
|
basedump = f.read()
|
|
else:
|
|
basedump = run_objdump(basecmd)
|
|
|
|
mydump = run_objdump(mycmd)
|
|
|
|
display = Display(basedump, mydump)
|
|
|
|
if not args.watch:
|
|
display.run_sync()
|
|
else:
|
|
if not args.make:
|
|
yn = input(
|
|
"Warning: watch-mode (-w) enabled without auto-make (-m). You will have to run make manually. Ok? (Y/n) "
|
|
)
|
|
if yn.lower() == "n":
|
|
return
|
|
if args.make:
|
|
watch_sources = None
|
|
if hasattr(diff_settings, "watch_sources_for_target"):
|
|
watch_sources = diff_settings.watch_sources_for_target(make_target)
|
|
watch_sources = watch_sources or source_directories
|
|
if not watch_sources:
|
|
fail("Missing source_directories config, don't know what to watch.")
|
|
else:
|
|
watch_sources = [make_target]
|
|
q = queue.Queue()
|
|
debounced_fs_watch(watch_sources, q, DEBOUNCE_DELAY)
|
|
display.run_async(q)
|
|
last_build = 0
|
|
try:
|
|
while True:
|
|
t = q.get()
|
|
if t is None:
|
|
break
|
|
if t < last_build:
|
|
continue
|
|
last_build = time.time()
|
|
if args.make:
|
|
display.progress("Building...")
|
|
ret = run_make(make_target, capture_output=True)
|
|
if ret.returncode != 0:
|
|
display.update(
|
|
ret.stderr.decode("utf-8-sig", "replace")
|
|
or ret.stdout.decode("utf-8-sig", "replace"),
|
|
error=True,
|
|
)
|
|
continue
|
|
mydump = run_objdump(mycmd)
|
|
display.update(mydump, error=False)
|
|
except KeyboardInterrupt:
|
|
display.terminate()
|
|
|
|
|
|
main()
|