119 lines
3.5 KiB
Python
119 lines
3.5 KiB
Python
# SPDX-FileCopyrightText: 2014 MicroPython & CircuitPython contributors (https://github.com/adafruit/circuitpython/graphs/contributors)
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#
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# SPDX-License-Identifier: MIT
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import sys
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import json
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# Map start block to current allocation info.
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current_heap = {}
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allocation_history = []
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root = {}
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def change_root(trace, size):
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level = root
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for frame in reversed(trace):
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file_location = frame[1]
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if file_location not in level:
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level[file_location] = {
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"blocks": 0,
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"file": file_location,
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"function": frame[2],
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"subcalls": {},
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}
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level[file_location]["blocks"] += size
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level = level[file_location]["subcalls"]
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total_actions = 0
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with open(sys.argv[1], "r") as f:
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for line in f:
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if not line.strip():
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break
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for line in f:
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action = None
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if line.startswith("Breakpoint 2"):
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break
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next(f) # throw away breakpoint code line
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next(f) # first frame
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block = 0
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size = 0
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trace = []
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for line in f:
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# print(line.strip())
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if line[0] == "#":
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frame = line.strip().split()
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if frame[1].startswith("0x"):
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trace.append((frame[1], frame[-1], frame[3]))
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else:
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trace.append(("0x0", frame[-1], frame[1]))
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elif line[0] == "$":
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block = int(line.strip().split()[-1][2:], 16)
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size = int(next(f).strip().split()[-1][2:], 16)
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if not line.strip():
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break
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action = "unknown"
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if block not in current_heap:
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current_heap[block] = {
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"start_block": block,
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"size": size,
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"start_trace": trace,
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"start_time": total_actions,
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}
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action = "alloc"
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change_root(trace, size)
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else:
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alloc = current_heap[block]
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alloc["end_trace"] = trace
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alloc["end_time"] = total_actions
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change_root(alloc["start_trace"], -1 * alloc["size"])
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if size > 0:
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action = "realloc"
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current_heap[block] = {
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"start_block": block,
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"size": size,
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"start_trace": trace,
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"start_time": total_actions,
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}
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change_root(trace, size)
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else:
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action = "free"
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if trace[0][2] == "gc_sweep":
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action = "sweep"
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del current_heap[block]
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alloc["end_cause"] = action
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allocation_history.append(alloc)
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print(total_actions, action, block, size)
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total_actions += 1
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print()
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for alloc in current_heap.values():
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alloc["end_trace"] = ""
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alloc["end_time"] = total_actions
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allocation_history.append(alloc)
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def print_frame(frame, indent=0):
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for key in sorted(frame):
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if (
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not frame[key]["blocks"]
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or key.startswith("../py/malloc.c")
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or key.startswith("../py/gc.c")
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):
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continue
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print(" " * (indent - 1), key, frame[key]["function"], frame[key]["blocks"], "blocks")
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print_frame(frame[key]["subcalls"], indent + 2)
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print_frame(root)
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total_blocks = 0
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for key in sorted(root):
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total_blocks += root[key]["blocks"]
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print(total_blocks, "total blocks")
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with open("allocation_history.json", "w") as f:
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json.dump(allocation_history, f)
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