Skip to content
Navigation Menu
{{ message }}
forked from adafruit/circuitpython
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathchart_code_size.py
More file actions
485 lines (450 loc) · 19.4 KB
/
Copy pathchart_code_size.py
File metadata and controls
485 lines (450 loc) · 19.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
# SPDX-FileCopyrightText: 2014 MicroPython & CircuitPython contributors (https://github.com/adafruit/circuitpython/graphs/contributors)
#
# SPDX-License-Identifier: MIT
# This script renders a graph of the CircuitPython rom image.
# It takes the single elf file and uses objdump to get its contents.
import pygraphviz as pgv
import click
import sh
# Replace dashes with underscores
objdump = sh.arm_none_eabi_objdump
def parse_hex(h):
return int("0x" + h, 0)
BAD_JUMPS = ["UNPREDICTABLE", "_etext"]
SPECIAL_NODE_COLORS = {"main": "pink", "exception_table": "green"}
@click.command()
@click.argument("elf_filename")
def do_all_the_things(elf_filename):
symbol = None
last_address = 0
all_symbols = {}
symbols_by_debug_address = {}
symbols_by_memory_address = {}
symbols_by_linkage_name = {}
# Gather type info so we know how to treat the disassembly
debug_dump = objdump("--dwarf=info", elf_filename)
debug_dump_lines = debug_dump.stdout.decode("utf-8").split("\n")
symbol_stack = []
symbol = None
ignore = False
min_call_site_param = 0x20000000
for line in debug_dump_lines:
if not line:
continue
parts = line.split()
if line[1] == "<":
if parts[-1] == "0":
symbol = symbol_stack.pop()
continue
debug_type = parts[-1].strip("()")
ignore = False
# skip info about function parameters
if debug_type == "DW_TAG_formal_parameter":
ignore = True
depth = int(parts[0].split(">")[0].strip("<"))
if len(symbol_stack) == (depth - 1) and depth > 0:
symbol_stack.append(symbol)
elif symbol and "name" in symbol:
if symbol["debug_type"] == "DW_TAG_variable":
if "start_address" not in symbol:
pass
else:
symbols_by_memory_address[symbol["start_address"]] = symbol
elif symbol["debug_type"] in [
"DW_TAG_member",
"DW_TAG_label",
"DW_TAG_typedef",
"DW_TAG_enumerator",
"DW_TAG_enumeration_type",
"DW_TAG_base_type",
"DW_TAG_structure_type",
"DW_TAG_compile_unit",
"DW_TAG_union_type",
]:
# skip symbols that don't end up in memory. the type info is available through the debug address map
pass
else:
if symbol["name"] in all_symbols:
# print(depth, symbol["name"])
# print(symbol)
# print(all_symbols[symbol["name"]])
# print()
pass
all_symbols[symbol["name"]] = symbol
elif (
symbol
and symbol["debug_type"] == "DW_TAG_GNU_call_site_parameter"
and "call_site_value" in symbol
):
parent = -1
while symbol_stack[parent]["debug_type"] != "DW_TAG_subprogram":
parent -= 1
parent = symbol_stack[parent]
# Only point to ROM
addr = symbol["call_site_value"]
if 0x2000 <= addr < 0x20000000:
if "outgoing_pointers" not in parent:
parent["outgoing_pointers"] = set()
parent["outgoing_pointers"].add(addr)
if addr not in symbols_by_memory_address:
symbols_by_memory_address[addr] = symbol
min_call_site_param = min(addr, min_call_site_param)
symbol["name"] = "name{:x}".format(addr)
address = parse_hex(parts[0].split("<")[-1].strip(">:"))
symbol = {"debug_address": address, "debug_type": debug_type, "other": []}
if debug_type == "DW_TAG_structure_type":
symbol["struct"] = {}
elif debug_type == "DW_TAG_array_type":
symbol["subtype"] = None
symbol["bound_count"] = 0
symbol["maxlen"] = 0
elif debug_type == "DW_TAG_subrange_type":
symbol_stack[-1]["subtype"] = symbol
symbols_by_debug_address[address] = symbol
elif ignore:
continue
elif line[:4] == " ":
tag = parts[1].strip(":")
if tag == "DW_AT_name":
symbol["name"] = parts[-1]
elif tag == "DW_AT_type":
symbol["type"] = int(parts[-1].strip("<>"), 0)
if symbol["debug_type"] == "DW_TAG_subrange_type":
if not symbol_stack[-1]["subtype"]:
symbol_stack[-1]["subtype"] = symbol
elif symbol_stack[-1]["subtype"]["type"] == symbol["type"]:
second_subtype = True
else:
raise RuntimeError()
elif tag == "DW_AT_upper_bound":
# Skip arrays with length defined by other variables
if parts[-1][0] != "<":
upper_bound = int(parts[-1])
if symbol_stack[-1]["bound_count"] > 0:
symbol_stack[-1]["maxlen"] *= upper_bound + 1
else:
symbol_stack[-1]["maxlen"] = upper_bound + 1
symbol_stack[-1]["bound_count"] += 1
elif tag == "DW_AT_byte_size":
symbol["size"] = int(parts[-1])
elif tag == "DW_AT_inline":
symbol["inlined"] = True
elif tag == "DW_AT_low_pc":
addr = int(parts[-1], 0)
symbols_by_memory_address[addr] = symbol
elif tag == "DW_AT_location":
if parts[-2] == "(DW_OP_addr:":
addr = parse_hex(parts[-1].strip(")"))
if addr > 0:
symbol["start_address"] = addr
elif tag == "DW_AT_linkage_name":
symbol["linkage_name"] = parts[-1]
symbols_by_linkage_name[symbol["linkage_name"]] = symbol
elif tag == "DW_AT_data_member_location":
symbol_stack[-1]["struct"][int(parts[-1])] = symbol
elif tag == "DW_AT_GNU_call_site_value":
if parts[-2] == "(DW_OP_addr:":
symbol["call_site_value"] = parse_hex(parts[-1].strip(")"))
else:
symbol["other"].append(line)
# print(parts)
pass
else:
# print(line)
pass
MEMORY_NONE = 0
MEMORY_POINTER = 1
MEMORY_PY_OBJECT = 2
def get_size(t):
if "size" in t:
return t["size"]
return get_size(symbols_by_debug_address[t["type"]])
def get_pointer_map(t, depth=0):
if t["debug_type"] == "DW_TAG_pointer_type":
return {0: MEMORY_POINTER}
elif t["debug_type"] in [
"DW_TAG_const_type",
"DW_TAG_typedef",
"DW_TAG_member",
"DW_TAG_subrange_type",
"DW_TAG_volatile_type",
]:
if "name" in t and t["name"] == "mp_rom_obj_t":
return {0: MEMORY_PY_OBJECT}
return get_pointer_map(symbols_by_debug_address[t["type"]], depth + 1)
elif t["debug_type"] in ["DW_TAG_base_type", "DW_TAG_enumeration_type"]:
return {}
elif t["debug_type"] == "DW_TAG_union_type":
# skip for now
return {}
elif "struct" in t:
combined_map = {}
for offset in t["struct"]:
member = t["struct"][offset]
submap = get_pointer_map(member)
for suboffset in submap:
combined_map[offset + suboffset] = submap[suboffset]
return combined_map
elif "subtype" in t:
subtype = symbols_by_debug_address[t["type"]]
pmap = get_pointer_map(subtype, depth + 1)
size = get_size(subtype)
expanded_map = {}
for i in range(t["maxlen"]):
for offset in pmap:
expanded_map[size * i + offset] = pmap[offset]
return expanded_map
else:
print("no recurse", t)
pass
return {}
# Do a second pass to dereference the types
for symbol_address in symbols_by_memory_address:
symbol = symbols_by_memory_address[symbol_address]
if "type" in symbol:
if symbol["debug_type"] == "DW_TAG_variable":
symbol["pointer_map"] = get_pointer_map(symbols_by_debug_address[symbol["type"]])
type_string = []
t = symbol["type"]
offset = []
while t != None:
t_symbol = symbols_by_debug_address[t]
t = t_symbol.get("type", None)
if "name" in t_symbol:
type_string.append(t_symbol["name"])
elif t_symbol["debug_type"] == "DW_TAG_array_type":
type_string.append("[]")
elif t_symbol["debug_type"] == "DW_TAG_pointer_type":
type_string.append("*")
elif t_symbol["debug_type"] == "DW_TAG_const_type":
type_string.append("const")
elif t_symbol["debug_type"] == "DW_TAG_volatile_type":
type_string.append("volatile")
else:
# print(" ", t_symbol)
pass
type_string.reverse()
symbol["type_string"] = " ".join(type_string)
# print(symbol_name, symbol["debug_type"], symbol.get("type_string", ""))
# print()
# print()
# print(all_symbols["mp_builtin_module_table"])
# return
# Gather size and call info
text_dump = objdump("-Dz", "-j", ".text", elf_filename)
text_dump_lines = text_dump.stdout.decode("utf-8").split("\n")
section = None
symbol = None
symbol_type = None
for line in text_dump_lines[4:]:
if line.startswith("Disassembly of section"):
section = line.split()[-1].strip(":")
elif not line:
if symbol and "end_address" not in symbol:
symbol["end_address"] = last_address
symbol["size"] = last_address - symbol["start_address"]
symbol = None
continue
elif line[0].isnumeric():
symbol_address, symbol_name = line.split()
symbol_address = parse_hex(symbol_address)
symbol_name = symbol_name.strip("<>:")
if symbol_name in symbols_by_linkage_name:
linked_name = symbol_name
symbol = symbols_by_linkage_name[symbol_name]
if "name" in symbol:
non_linkage = symbol["name"]
if not non_linkage.startswith("__builtin"):
symbol_name = non_linkage
all_symbols[symbol_name] = symbol
if "name" not in symbol:
symbol["name"] = symbol_name
elif symbol_address in symbols_by_memory_address:
all_symbols[symbol_name] = symbols_by_memory_address[symbol_address]
if "name" not in all_symbols[symbol_name]:
all_symbols[symbol_name]["name"] = symbol_name
elif symbol_name not in all_symbols:
if symbol_name == "nlr_push_tail_var":
fake_type = all_symbols["mp_obj_get_type"]["type"]
symbol = {
"debug_type": "DW_TAG_variable",
"name": symbol_name,
"type": fake_type,
}
else:
print(line)
print(symbol_name, symbol_address)
symbol = {"debug_type": "DW_TAG_subprogram", "name": symbol_name}
all_symbols[symbol_name] = symbol
# raise RuntimeError()
symbol = all_symbols[symbol_name]
symbol["start_address"] = symbol_address
symbols_by_memory_address[symbol_address] = symbol
symbol["section"] = section
if symbol["debug_type"] == "DW_TAG_subprogram":
symbol["outgoing_jumps"] = set()
symbol["incoming_jumps"] = set()
symbol_type = None
elif symbol["debug_type"] == "DW_TAG_variable":
symbol["outgoing_pointers"] = set()
symbol_type = symbols_by_debug_address[symbol["type"]]
all_symbols[symbol_name] = symbol
elif line[0] == " ":
parts = line.strip().split()
last_address = parse_hex(parts[0].strip(":"))
offset = last_address - symbol["start_address"]
if "pointer_map" in symbol:
if offset not in symbol["pointer_map"]:
# print(offset, symbol)
pass
else:
ref = parse_hex(parts[1])
pointer_style = symbol["pointer_map"][offset]
if pointer_style == MEMORY_POINTER:
symbol["outgoing_pointers"].add(ref & 0xFFFFFFFE)
elif pointer_style == MEMORY_PY_OBJECT and ref & 0x3 == 0:
symbol["outgoing_pointers"].add(ref)
if len(parts[1]) == 8 and parts[1][0] == "0":
addr = parse_hex(parts[1])
if 0x2000 <= addr < 0x20000000:
if "outgoing_pointers" not in symbol:
symbol["outgoing_pointers"] = set()
symbol["outgoing_pointers"].add(addr)
elif "<" in line and symbol["debug_type"] == "DW_TAG_subprogram":
if line[-1] == ">":
jump_to = parts[-1].strip("<>").split("+")[0]
if "name" not in symbol:
print(jump_to)
print(symbol)
if jump_to != symbol["name"] and jump_to not in BAD_JUMPS:
symbol["outgoing_jumps"].add(jump_to)
# print(symbol_name, jump_to)
if jump_to == "_etext":
print(line)
elif "UNDEFINED" in line:
continue
elif parts[2] == "ldr":
continue
else:
print(line)
else:
# print(line)
pass
# print()
print(hex(min_call_site_param))
print(all_symbols["exception_table"])
# return
print("converting outgoing pointers to names")
# Convert outgoing pointers to names from addresses
for symbol_name in all_symbols:
symbol = all_symbols[symbol_name]
if "outgoing_pointers" not in symbol:
continue
converted = set()
for outgoing in symbol["outgoing_pointers"]:
if outgoing in symbols_by_memory_address:
outgoing = symbols_by_memory_address[outgoing]
# print(outgoing)
if outgoing["debug_type"] in ["DW_TAG_GNU_call_site", "DW_TAG_lexical_block"]:
continue
if outgoing["name"] == "audioio_wavefile_type":
print(outgoing)
converted.add(outgoing["name"])
symbol["outgoing_pointers"] = converted
print("linking back")
# Link back
for symbol_name in all_symbols:
symbol = all_symbols[symbol_name]
if "outgoing_jumps" in symbol:
for outgoing in symbol["outgoing_jumps"]:
if outgoing not in all_symbols:
# print(outgoing, symbol_name)
continue
# print(all_symbols[outgoing], symbol_name)
referenced_symbol = all_symbols[outgoing]
if "incoming_jumps" not in referenced_symbol:
# print(symbol_name, "->", outgoing)
referenced_symbol["incoming_jumps"] = set()
referenced_symbol["incoming_jumps"].add(symbol_name)
if "outgoing_pointers" in symbol:
for outgoing in symbol["outgoing_pointers"]:
if outgoing not in all_symbols:
# print(outgoing, symbol_name)
continue
# print(all_symbols[outgoing], symbol_name)
referenced_symbol = all_symbols[outgoing]
if "incoming_pointers" not in referenced_symbol:
# print(symbol_name, "->", outgoing)
referenced_symbol["incoming_pointers"] = set()
referenced_symbol["incoming_pointers"].add(symbol_name)
print(all_symbols["exception_table"])
# Chart it all
print("charting {} symbols".format(len(all_symbols)))
callgraph = pgv.AGraph(directed=True)
for i, symbol_name in enumerate(all_symbols):
symbol = all_symbols[symbol_name]
# print(i, symbol_name)
# if "outgoing_jumps" in symbol:
# print(" ", len(symbol["outgoing_jumps"]), "jumps")
# if "outgoing_pointers" in symbol:
# print(" ", len(symbol["outgoing_pointers"]), "ptrs")
# if i > 3000:
# break
if ("incoming_jumps" not in symbol or len(symbol["incoming_jumps"]) == 0) and (
"incoming_pointers" not in symbol or len(symbol["incoming_pointers"]) == 0
):
# print(symbol_name)
continue
if "start_address" not in symbol:
continue
callgraph.add_node(symbol_name)
if "outgoing_jumps" in symbol:
for outgoing in symbol["outgoing_jumps"]:
callgraph.add_edge(symbol_name, outgoing)
if "outgoing_pointers" in symbol:
for outgoing in symbol["outgoing_pointers"]:
callgraph.add_edge(symbol_name, outgoing, color="red")
# print(symbol_name, symbol)
# Style all of the nodes
print("styling")
for node in callgraph.iternodes():
if node.name not in all_symbols:
continue
symbol = all_symbols[node.name]
node.attr["shape"] = "box"
text_width_ish = len(node.name) * 0.1
if "size" not in symbol:
print(symbol)
size = symbol["size"] / 8
square_size = size ** 0.5
if text_width_ish > square_size:
w = text_width_ish
h = size / text_width_ish
else:
w = square_size
h = square_size
node.attr["width"] = w
node.attr["height"] = h
node.attr["label"] = node.name + "\r\n" + str(symbol["size"]) + " bytes"
node.attr["style"] = "filled"
incoming = 0
if "incoming_jumps" in symbol:
incoming += len(symbol["incoming_jumps"])
if "incoming_pointers" in symbol:
incoming += len(symbol["incoming_pointers"])
if node.name in SPECIAL_NODE_COLORS:
node.attr["color"] = SPECIAL_NODE_COLORS[node.name]
elif incoming == 1:
node.attr["color"] = "lightblue"
elif incoming > 25:
print("delete", node.name, "because it has {} incoming".format(incoming))
callgraph.delete_node(node.name)
elif incoming > 15:
node.attr["color"] = "red"
print("drawing")
callgraph.layout(prog="dot")
fn = "callgraph.svg"
print(fn)
callgraph.draw(fn)
if __name__ == "__main__":
do_all_the_things()
You can’t perform that action at this time.