2016-05-25 17:37:40 +02:00
|
|
|
#!/usr/bin/env python
|
|
|
|
# Script that tries to find how much stack space each function in an
|
|
|
|
# object is using.
|
|
|
|
#
|
|
|
|
# Copyright (C) 2015 Kevin O'Connor <kevin@koconnor.net>
|
|
|
|
#
|
|
|
|
# This file may be distributed under the terms of the GNU GPLv3 license.
|
|
|
|
|
|
|
|
# Usage:
|
|
|
|
# avr-objdump -d out/klipper.elf | scripts/checkstack.py
|
|
|
|
|
|
|
|
import sys
|
|
|
|
import re
|
|
|
|
|
|
|
|
# Functions that change stacks
|
|
|
|
STACKHOP = []
|
|
|
|
# List of functions we can assume are never called.
|
|
|
|
IGNORE = []
|
|
|
|
|
|
|
|
OUTPUTDESC = """
|
|
|
|
#funcname1[preamble_stack_usage,max_usage_with_callers]:
|
|
|
|
# insn_addr:called_function [usage_at_call_point+caller_preamble,total_usage]
|
|
|
|
#
|
|
|
|
#funcname2[p,m,max_usage_to_yield_point]:
|
|
|
|
# insn_addr:called_function [u+c,t,usage_to_yield_point]
|
|
|
|
"""
|
|
|
|
|
|
|
|
class function:
|
|
|
|
def __init__(self, funcaddr, funcname):
|
|
|
|
self.funcaddr = funcaddr
|
|
|
|
self.funcname = funcname
|
|
|
|
self.basic_stack_usage = 0
|
|
|
|
self.max_stack_usage = None
|
|
|
|
self.yield_usage = -1
|
|
|
|
self.max_yield_usage = None
|
|
|
|
self.total_calls = 0
|
|
|
|
# called_funcs = [(insnaddr, calladdr, stackusage), ...]
|
|
|
|
self.called_funcs = []
|
|
|
|
self.subfuncs = {}
|
|
|
|
# Update function info with a found "yield" point.
|
|
|
|
def noteYield(self, stackusage):
|
|
|
|
if self.yield_usage < stackusage:
|
|
|
|
self.yield_usage = stackusage
|
|
|
|
# Update function info with a found "call" point.
|
|
|
|
def noteCall(self, insnaddr, calladdr, stackusage):
|
|
|
|
if (calladdr, stackusage) in self.subfuncs:
|
|
|
|
# Already noted a nearly identical call - ignore this one.
|
|
|
|
return
|
|
|
|
self.called_funcs.append((insnaddr, calladdr, stackusage))
|
|
|
|
self.subfuncs[(calladdr, stackusage)] = 1
|
|
|
|
|
|
|
|
# Find out maximum stack usage for a function
|
|
|
|
def calcmaxstack(info, funcs):
|
|
|
|
if info.max_stack_usage is not None:
|
|
|
|
return
|
|
|
|
info.max_stack_usage = max_stack_usage = info.basic_stack_usage
|
|
|
|
info.max_yield_usage = max_yield_usage = info.yield_usage
|
|
|
|
total_calls = 0
|
|
|
|
seenbefore = {}
|
|
|
|
# Find max of all nested calls.
|
|
|
|
for insnaddr, calladdr, usage in info.called_funcs:
|
|
|
|
callinfo = funcs.get(calladdr)
|
|
|
|
if callinfo is None:
|
|
|
|
continue
|
|
|
|
calcmaxstack(callinfo, funcs)
|
|
|
|
if callinfo.funcname not in seenbefore:
|
|
|
|
seenbefore[callinfo.funcname] = 1
|
|
|
|
total_calls += callinfo.total_calls + 1
|
|
|
|
funcnameroot = callinfo.funcname.split('.')[0]
|
|
|
|
if funcnameroot in IGNORE:
|
|
|
|
# This called function is ignored - don't contribute it to
|
|
|
|
# the max stack.
|
|
|
|
continue
|
|
|
|
totusage = usage + callinfo.max_stack_usage
|
|
|
|
totyieldusage = usage + callinfo.max_yield_usage
|
|
|
|
if funcnameroot in STACKHOP:
|
|
|
|
# Don't count children of this function
|
|
|
|
totusage = totyieldusage = usage
|
|
|
|
if totusage > max_stack_usage:
|
|
|
|
max_stack_usage = totusage
|
|
|
|
if callinfo.max_yield_usage >= 0 and totyieldusage > max_yield_usage:
|
|
|
|
max_yield_usage = totyieldusage
|
|
|
|
info.max_stack_usage = max_stack_usage
|
|
|
|
info.max_yield_usage = max_yield_usage
|
|
|
|
info.total_calls = total_calls
|
|
|
|
|
|
|
|
# Try to arrange output so that functions that call each other are
|
|
|
|
# near each other.
|
|
|
|
def orderfuncs(funcaddrs, availfuncs):
|
|
|
|
l = [(availfuncs[funcaddr].total_calls
|
|
|
|
, availfuncs[funcaddr].funcname, funcaddr)
|
|
|
|
for funcaddr in funcaddrs if funcaddr in availfuncs]
|
|
|
|
l.sort()
|
|
|
|
l.reverse()
|
|
|
|
out = []
|
|
|
|
while l:
|
|
|
|
count, name, funcaddr = l.pop(0)
|
|
|
|
info = availfuncs.get(funcaddr)
|
|
|
|
if info is None:
|
|
|
|
continue
|
|
|
|
calladdrs = [calls[1] for calls in info.called_funcs]
|
|
|
|
del availfuncs[funcaddr]
|
|
|
|
out = out + orderfuncs(calladdrs, availfuncs) + [info]
|
|
|
|
return out
|
|
|
|
|
|
|
|
hex_s = r'[0-9a-f]+'
|
|
|
|
re_func = re.compile(r'^(?P<funcaddr>' + hex_s + r') <(?P<func>.*)>:$')
|
|
|
|
re_asm = re.compile(
|
|
|
|
r'^[ ]*(?P<insnaddr>' + hex_s
|
|
|
|
+ r'):\t[^\t]*\t(?P<insn>[^\t]+?)(?P<params>\t[^;]*)?'
|
|
|
|
+ r'[ ]*(; (?P<calladdr>0x' + hex_s
|
|
|
|
+ r') <(?P<ref>.*)>)?$')
|
|
|
|
|
|
|
|
def main():
|
|
|
|
unknownfunc = function(None, "<unknown>")
|
|
|
|
indirectfunc = function(-1, '<indirect>')
|
|
|
|
unknownfunc.max_stack_usage = indirectfunc.max_stack_usage = 0
|
|
|
|
unknownfunc.max_yield_usage = indirectfunc.max_yield_usage = -1
|
|
|
|
funcs = {-1: indirectfunc}
|
|
|
|
funcaddr = None
|
|
|
|
datalines = {}
|
|
|
|
cur = None
|
|
|
|
atstart = 0
|
|
|
|
stackusage = 0
|
|
|
|
|
|
|
|
# Parse input lines
|
|
|
|
for line in sys.stdin.readlines():
|
|
|
|
m = re_func.match(line)
|
|
|
|
if m is not None:
|
|
|
|
# Found function
|
|
|
|
funcaddr = int(m.group('funcaddr'), 16)
|
|
|
|
funcs[funcaddr] = cur = function(funcaddr, m.group('func'))
|
|
|
|
stackusage = 0
|
|
|
|
atstart = 1
|
|
|
|
continue
|
|
|
|
m = re_asm.match(line)
|
|
|
|
if m is None:
|
|
|
|
if funcaddr not in datalines:
|
|
|
|
datalines[funcaddr] = line.split()
|
|
|
|
#print("other", repr(line))
|
|
|
|
continue
|
|
|
|
insn = m.group('insn')
|
|
|
|
|
|
|
|
if insn == 'push':
|
|
|
|
stackusage += 1
|
|
|
|
continue
|
|
|
|
if insn == 'rcall' and m.group('params').strip() == '.+0':
|
|
|
|
stackusage += 2
|
|
|
|
continue
|
|
|
|
|
|
|
|
if atstart:
|
|
|
|
if insn in ['in', 'eor']:
|
|
|
|
continue
|
|
|
|
cur.basic_stack_usage = stackusage
|
|
|
|
atstart = 0
|
|
|
|
|
|
|
|
insnaddr = m.group('insnaddr')
|
|
|
|
calladdr = m.group('calladdr')
|
|
|
|
if calladdr is None:
|
|
|
|
if insn == 'ijmp':
|
|
|
|
# Indirect tail call
|
|
|
|
cur.noteCall(insnaddr, -1, 0)
|
|
|
|
elif insn == 'icall':
|
|
|
|
cur.noteCall(insnaddr, -1, stackusage + 2)
|
|
|
|
else:
|
|
|
|
# misc instruction
|
|
|
|
continue
|
|
|
|
else:
|
|
|
|
# Jump or call insn
|
|
|
|
calladdr = int(calladdr, 16)
|
|
|
|
ref = m.group('ref')
|
|
|
|
if '+' in ref:
|
|
|
|
# Inter-function jump.
|
|
|
|
pass
|
2017-03-27 01:26:20 +02:00
|
|
|
elif insn.startswith('ld') or insn.startswith('st'):
|
|
|
|
# memory access
|
|
|
|
pass
|
2016-05-25 17:37:40 +02:00
|
|
|
elif insn in ('rjmp', 'jmp', 'brne', 'brcs'):
|
|
|
|
# Tail call
|
|
|
|
cur.noteCall(insnaddr, calladdr, 0)
|
|
|
|
elif insn in ('rcall', 'call'):
|
|
|
|
cur.noteCall(insnaddr, calladdr, stackusage + 2)
|
|
|
|
else:
|
|
|
|
print("unknown call", ref)
|
|
|
|
cur.noteCall(insnaddr, calladdr, stackusage)
|
|
|
|
# Reset stack usage to preamble usage
|
|
|
|
stackusage = cur.basic_stack_usage
|
|
|
|
|
|
|
|
# Update for known indirect functions
|
|
|
|
funcsbyname = {}
|
|
|
|
for info in funcs.values():
|
|
|
|
funcnameroot = info.funcname.split('.')[0]
|
|
|
|
funcsbyname[funcnameroot] = info
|
|
|
|
mainfunc = funcsbyname.get('sched_main')
|
|
|
|
cmdfunc = funcsbyname.get('command_task')
|
|
|
|
eventfunc = funcsbyname.get('__vector_13')
|
|
|
|
for funcnameroot, info in funcsbyname.items():
|
|
|
|
if (funcnameroot.startswith('_DECL_taskfuncs_')
|
|
|
|
or funcnameroot.startswith('_DECL_initfuncs_')
|
|
|
|
or funcnameroot.startswith('_DECL_shutdownfuncs_')):
|
|
|
|
funcname = funcnameroot[funcnameroot.index('_', 7)+1:]
|
|
|
|
f = funcsbyname[funcname]
|
|
|
|
mainfunc.noteCall(0, f.funcaddr, mainfunc.basic_stack_usage + 2)
|
|
|
|
if funcnameroot.startswith('parser_'):
|
|
|
|
f = funcsbyname.get(funcnameroot[7:])
|
|
|
|
if f is not None:
|
|
|
|
numparams = int(datalines[info.funcaddr][2], 16)
|
|
|
|
stackusage = cmdfunc.basic_stack_usage + 2 + numparams * 4
|
|
|
|
cmdfunc.noteCall(0, f.funcaddr, stackusage)
|
|
|
|
if funcnameroot.endswith('_event'):
|
|
|
|
eventfunc.noteCall(0, info.funcaddr, eventfunc.basic_stack_usage + 2)
|
|
|
|
|
|
|
|
# Calculate maxstackusage
|
|
|
|
for info in funcs.values():
|
|
|
|
calcmaxstack(info, funcs)
|
|
|
|
|
|
|
|
# Sort functions for output
|
|
|
|
funcinfos = orderfuncs(funcs.keys(), funcs.copy())
|
|
|
|
|
|
|
|
# Show all functions
|
|
|
|
print(OUTPUTDESC)
|
|
|
|
for info in funcinfos:
|
|
|
|
if info.max_stack_usage == 0 and info.max_yield_usage < 0:
|
|
|
|
continue
|
|
|
|
yieldstr = ""
|
|
|
|
if info.max_yield_usage >= 0:
|
|
|
|
yieldstr = ",%d" % info.max_yield_usage
|
|
|
|
print("\n%s[%d,%d%s]:" % (info.funcname, info.basic_stack_usage
|
|
|
|
, info.max_stack_usage, yieldstr))
|
|
|
|
for insnaddr, calladdr, stackusage in info.called_funcs:
|
|
|
|
callinfo = funcs.get(calladdr, unknownfunc)
|
|
|
|
yieldstr = ""
|
|
|
|
if callinfo.max_yield_usage >= 0:
|
|
|
|
yieldstr = ",%d" % (stackusage + callinfo.max_yield_usage)
|
|
|
|
print(" %04s:%-40s [%d+%d,%d%s]" % (
|
|
|
|
insnaddr, callinfo.funcname, stackusage
|
|
|
|
, callinfo.basic_stack_usage
|
|
|
|
, stackusage+callinfo.max_stack_usage, yieldstr))
|
|
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
|
main()
|