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Merge pull request #1 from rversteegen/master
Improvements and fixes
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‎README.md

+55-25
Original file line numberDiff line numberDiff line change
@@ -1,34 +1,64 @@
11
# Linker Map Summary
2-
Summarizes the size of objects linked into a binary based on the linker map.
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Summarizes the size of objects linked into a binary based on a linker map
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generated by GNU ld with --print-map (should work on all platforms), by summing
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together portions in sections spread throughout the binary.
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This is useful to see the size impact of different portions of code after the
46
linker has dropped unneeded sections.
57

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Requires python 2.7+ or 3.2+.
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610
## Use
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`python2 analyze_map.py firmware.elf.map`
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`python analyze_map.py [--combine] firmware.elf.map`
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## Example Output
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(Older output format)
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```
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/usr/local/Cellar/arm-none-eabi-gcc/20150921/arm-none-eabi/lib/armv6-m/libm.a(lib_a-kf_rem_pio2.o) 1888
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build-arduino_zero/py/mpprint.o 1938
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build-arduino_zero/py/objset.o 2018
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build-arduino_zero/py/obj.o 2038
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build-arduino_zero/py/objarray.o 2122
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build-arduino_zero/boards/arduino_zero/pins.o 2144
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build-arduino_zero/py/objdict.o 2146
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build-arduino_zero/py/objlist.o 2210
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build-arduino_zero/py/lexer.o 2405
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build-arduino_zero/py/objexcept.o 2466
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build-arduino_zero/asf/sam0/drivers/usb/stack_interface/usb_device_udd.o 2692
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build-arduino_zero/asf/sam0/drivers/usb/usb_sam_d_r/usb.o 3026
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build-arduino_zero/py/emitbc.o 3166
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build-arduino_zero/py/modbuiltins.o 3219
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build-arduino_zero/py/gc.o 3411
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build-arduino_zero/py/objtype.o 3579
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build-arduino_zero/py/vm.o 4259
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build-arduino_zero/py/runtime.o 4627
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build-arduino_zero/py/parse.o 4676
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build-arduino_zero/py/qstr.o 6589
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build-arduino_zero/py/objstr.o 9070
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build-arduino_zero/lib/fatfs/ff.o 10777
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build-arduino_zero/py/compile.o 11731
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```
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/usr/local/Cellar/arm-none-eabi-gcc/20150921/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/lib/armv6-m//libm.a(lib_a-kf_rem_pio2.o) 1888
12-
build-arduino_zero/py/mpprint.o 1938
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build-arduino_zero/py/objset.o 2018
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build-arduino_zero/py/obj.o 2038
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build-arduino_zero/py/objarray.o 2122
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build-arduino_zero/boards/arduino_zero/pins.o 2144
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build-arduino_zero/py/objdict.o 2146
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build-arduino_zero/py/objlist.o 2210
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build-arduino_zero/py/lexer.o 2405
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build-arduino_zero/py/objexcept.o 2466
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build-arduino_zero/asf/sam0/drivers/usb/stack_interface/usb_device_udd.o 2692
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build-arduino_zero/asf/sam0/drivers/usb/usb_sam_d_r/usb.o 3026
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build-arduino_zero/py/emitbc.o 3166
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build-arduino_zero/py/modbuiltins.o 3219
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build-arduino_zero/py/gc.o 3411
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build-arduino_zero/py/objtype.o 3579
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build-arduino_zero/py/vm.o 4259
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build-arduino_zero/py/runtime.o 4627
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build-arduino_zero/py/parse.o 4676
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build-arduino_zero/py/qstr.o 6589
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build-arduino_zero/py/objstr.o 9070
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build-arduino_zero/lib/fatfs/ff.o 10777
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build-arduino_zero/py/compile.o 11731
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An example with --combine:
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```
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C:\Program Files\FreeBASIC-1.04.0-2-win32-mingworg\lib\win32\*.o 60 (code: 40 data: 20)
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c:/mingw/lib/libole32.a 78 (code: 8 data: 70)
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c:/mingw/lib/libshell32.a 124 (code: 16 data: 108)
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c:/mingw/lib/libpsapi.a 132 (code: 16 data: 116)
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c:/mingw/lib/libmoldname.a 132 (code: 24 data: 108)
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c:/mingw/lib/libadvapi32.a 168 (code: 24 data: 144)
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c:/mingw/lib/libuser32.a 196 (code: 32 data: 164)
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*fill* 432 (code: 28 data: 404)
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c:/mingw/lib/gcc/mingw32/4.8.1/*.o 552 (code: 260 data: 292)
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c:/mingw/lib/*.o 980 (code: 768 data: 212)
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c:/mingw/lib/libmsvcrt.a 2790 (code: 680 data: 2110)
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c:/mingw/lib/libkernel32.a 3140 (code: 624 data: 2516)
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c:/mingw/lib/gcc/mingw32/4.8.1/libgcc.a 3736 (code: 2476 data: 1260)
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c:/mingw/lib/libmingw32.a 4232 (code: 2848 data: 1384)
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build\lib\*.o 6244 (code: 6224 data: 20)
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c:/mingw/lib/gcc/mingw32/4.8.1/libgcc_eh.a 21252 (code: 16704 data: 4548)
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c:/mingw/lib/libmingwex.a 29992 (code: 24704 data: 5288)
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c:/mingw/lib/gcc/mingw32/4.8.1\libstdc++.a 49144 (code: 31624 data: 17520)
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C:\Program Files\FreeBASIC-1.04.0-win32-mingworg\lib\win32/libfbmt.a 51688 (code: 46272 data: 5416)
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build\*.o 168248 (code: 149456 data: 18792)
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TOTAL 343320 (code: 282828 data: 60492)
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```

‎analyze_map.py

100644100755
+80-25
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,8 @@
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#!/usr/bin/env python3
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# MIT License
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#
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# Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
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# Copyright (c) 2018 Ralph Versteegen
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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from __future__ import print_function
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2527
import sys
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import os
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import argparse
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parser = argparse.ArgumentParser(description='Summarises the size of each object file in an ld linker map.')
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parser.add_argument('map_file', help="A map file generated by passing -M/--print-map to ld during linking.")
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parser.add_argument('--combine', action='store_true',
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help="All object files in an .a archive or in a directory are combined")
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args = parser.parse_args()
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37+
class SectionSize():
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code = 0
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data = 0 # Including metadata like import tables
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def total(self):
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return self.code + self.data
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def add_section(self, section, size):
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if section.startswith('.text'):
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self.code += size
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elif section != '.bss':
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self.data += size
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2748
size_by_source = {}
28-
with open(sys.argv[1]) as f:
29-
memory_map_started = False
30-
current_section = None
31-
for line in f:
32-
if memory_map_started:
33-
if True or line.startswith((".", " .")):
34-
pieces = line.split()
35-
if line.startswith("."):
36-
current_section = pieces[0]
37-
elif len(pieces) >= 3 and current_section in [".rodata", ".text"] and "=" not in pieces and "before" not in pieces:
38-
if pieces[0] == "*fill*":
39-
source = pieces[0]
40-
size = int(pieces[-1], 16)
41-
else:
42-
source = pieces[-1]
43-
size = int(pieces[-2], 16)
44-
if source not in size_by_source:
45-
size_by_source[source] = 0
46-
size_by_source[source] += size
47-
elif line.strip() == "Linker script and memory map":
48-
memory_map_started = True
49-
50-
sources = size_by_source.keys()
51-
sources.sort(key=lambda x: size_by_source[x])
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with open(args.map_file) as f:
50+
lines = iter(f)
51+
for line in lines:
52+
if line.strip() == "Linker script and memory map":
53+
break
54+
55+
current_section = None
56+
split_line = None
57+
for line in lines:
58+
line = line.strip('\n')
59+
if split_line:
60+
# Glue a line that was split in two back together
61+
if line.startswith(' ' * 16):
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line = split_line + line
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else: # Shouldn't happen
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print("Warning: discarding line ", split_line)
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split_line = None
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67+
if line.startswith((".", " .", " *fill*")):
68+
pieces = line.split(None, 3) # Don't split paths containing spaces
69+
70+
if line.startswith("."):
71+
# Note: this line might be wrapped, with the size of the section
72+
# on the next line, but we ignore the size anyway and will ignore that line
73+
current_section = pieces[0]
74+
elif len(pieces) == 1 and len(line) > 14:
75+
# ld splits the rest of this line onto the next if the section name is too long
76+
split_line = line
77+
elif len(pieces) >= 3 and "=" not in pieces and "before" not in pieces:
78+
if pieces[0] == "*fill*":
79+
source = pieces[0]
80+
size = int(pieces[-1], 16)
81+
else:
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source = pieces[-1]
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size = int(pieces[-2], 16)
84+
85+
if args.combine:
86+
if '.a(' in source:
87+
# path/to/archive.a(object.o)
88+
source = source[:source.index('.a(') + 2]
89+
elif source.endswith('.o'):
90+
where = max(source.rfind('\\'), source.rfind('/'))
91+
if where:
92+
source = source[:where + 1] + '*.o'
93+
94+
if source not in size_by_source:
95+
size_by_source[source] = SectionSize()
96+
size_by_source[source].add_section(current_section, size)
97+
98+
# Print out summary
99+
sources = list(size_by_source.keys())
100+
sources.sort(key = lambda x: size_by_source[x].total())
101+
sumtotal = sumcode = sumdata = 0
52102
for source in sources:
53-
print(source, size_by_source[source])
103+
size = size_by_source[source]
104+
sumcode += size.code
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sumdata += size.data
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sumtotal += size.total()
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print("%-40s \t%7s (code: %d data: %d)" % (os.path.normpath(source), size.total(), size.code, size.data))
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print("TOTAL %d (code: %d data: %d)" % (sumtotal, sumcode, sumdata))

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