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circuitpython/tools/gc_activity.py

95 lines
3.1 KiB

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