diff options
| -rwxr-xr-x | bin/win32kprof.py | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/bin/win32kprof.py b/bin/win32kprof.py new file mode 100755 index 00000000000..9e0873a5cec --- /dev/null +++ b/bin/win32kprof.py @@ -0,0 +1,205 @@ +#!/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() + + + + |