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#!/usr/bin/env python
import sys
import optparse
import re
import struct
__version__ = '0.1'
verbose = False
class Profile:
def __init__(self):
self.symbols = []
self.symbol_cache = {}
self.base_addr = None
self.functions = {}
self.last_stamp = 0
self.stamp_base = 0
def demangle(self, name):
if name.startswith('_'):
name = name[1:]
idx = name.rfind('@')
if idx != -1 and name[idx+1:].isdigit():
name = name[:idx]
# TODO: Demangle C++ names
return name
def unwrap_stamp(self, stamp):
if stamp < self.last_stamp:
self.stamp_base += 1 << 32
self.last_stamp = stamp
return self.stamp_base + stamp
def read_map(self, mapfile):
# See http://msdn.microsoft.com/en-us/library/k7xkk3e2.aspx
last_addr = 0
last_name = 0
for line in file(mapfile, "rt"):
fields = line.split()
try:
section_offset, name, addr, type, lib_object = fields
except ValueError:
continue
if type != 'f':
continue
addr = int(addr, 16)
name = self.demangle(name)
if last_addr == addr:
# TODO: handle collapsed functions
#assert last_name == name
continue
self.symbols.append((addr, name))
last_addr = addr
last_name = name
# sort symbols
self.symbols.sort(key = lambda (addr, name): addr)
def lookup_addr(self, addr):
try:
return self.symbol_cache[addr]
except KeyError:
pass
tolerance = 4196
s, e = 0, len(self.symbols)
while s != e:
i = (s + e)//2
start_addr, name = self.symbols[i]
try:
end_addr, next_name = self.symbols[i + 1]
except IndexError:
end_addr = start_addr + tolerance
if addr < start_addr:
e = i
continue
if addr == end_addr:
return next_name
if addr > end_addr:
s = i
continue
return name
return "0x%08x" % addr
def lookup_symbol(self, name):
for symbol_addr, symbol_name in self.symbols:
if name == symbol_name:
return symbol_addr
return 0
def read_data(self, data):
# TODO: compute these automatically
caller_overhead = 672 - 2*144 # __debug_profile_reference2 - 2*__debug_profile_reference1
callee_overhead = 144 # __debug_profile_reference1
callee_overhead -= 48 # tolerance
caller_overhead = callee_overhead
fp = file(data, "rb")
entry_format = "II"
entry_size = struct.calcsize(entry_format)
stack = []
last_stamp = 0
delta = 0
while True:
entry = fp.read(entry_size)
if len(entry) < entry_size:
break
addr_exit, stamp = struct.unpack(entry_format, entry)
if addr_exit == 0 and stamp == 0:
break
addr = addr_exit & 0xfffffffe
exit = addr_exit & 0x00000001
if self.base_addr is None:
ref_addr = self.lookup_symbol('__debug_profile_reference2')
if ref_addr:
self.base_addr = addr - ref_addr
else:
self.base_addr = 0
#print hex(self.base_addr)
rel_addr = addr - self.base_addr
#print hex(addr - self.base_addr)
name = self.lookup_addr(rel_addr)
stamp = self.unwrap_stamp(stamp)
delta += stamp - last_stamp
if not exit:
if verbose >= 2:
print "%10u >> 0x%08x" % (stamp, addr)
if verbose:
print "%10u >> %s" % (stamp, name)
delta -= caller_overhead
stack.append((name, stamp, delta))
delta = 0
else:
if verbose >= 2:
print "%10u << 0x%08x" % (stamp, addr)
if len(stack):
self_time = delta - callee_overhead
entry_name, entry_stamp, delta = stack.pop()
if entry_name != name:
if verbose:
print "%10u << %s" % (stamp, name)
#assert entry_name == name
break
total_time = stamp - entry_stamp
self.functions[entry_name] = self.functions.get(entry_name, 0) + self_time
if verbose:
print "%10u << %s %+u" % (stamp, name, self_time)
else:
delta = 0
last_stamp = stamp
def write_report(self):
total = sum(self.functions.values())
results = self.functions.items()
results.sort(key = lambda (name, time): -time)
for name, time in results:
perc = float(time)/float(total)*100.0
print "%6.03f %s" % (perc, name)
def main():
parser = optparse.OptionParser(
usage="\n\t%prog [options] [file] ...",
version="%%prog %s" % __version__)
parser.add_option(
'-m', '--map', metavar='FILE',
type="string", dest="map",
help="map file")
parser.add_option(
'-b', '--base', metavar='FILE',
type="string", dest="base",
help="base addr")
parser.add_option(
'-v', '--verbose',
action="count",
dest="verbose", default=0,
help="verbose output")
(options, args) = parser.parse_args(sys.argv[1:])
global verbose
verbose = options.verbose
profile = Profile()
if options.base is not None:
profile.base_addr = int(options.base, 16)
if options.map is not None:
profile.read_map(options.map)
for arg in args:
profile.read_data(arg)
profile.write_report()
if __name__ == '__main__':
main()
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