gallium: Pre-processor for win32 kernel profile output.
This commit is contained in:
José Fonseca
parent
345eb7fb70
commit
63ddae0990
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@ -0,0 +1,205 @@
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#!/usr/bin/env python
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import sys
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import optparse
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import re
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import struct
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__version__ = '0.1'
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verbose = False
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class Profile:
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def __init__(self):
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self.symbols = []
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self.symbol_cache = {}
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self.base_addr = None
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self.functions = {}
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self.last_stamp = 0
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self.stamp_base = 0
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def demangle(self, name):
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if name.startswith('_'):
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name = name[1:]
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idx = name.rfind('@')
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if idx != -1 and name[idx+1:].isdigit():
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name = name[:idx]
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# TODO: Demangle C++ names
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return name
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def unwrap_stamp(self, stamp):
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if stamp < self.last_stamp:
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self.stamp_base += 1 << 32
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self.last_stamp = stamp
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return self.stamp_base + stamp
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def read_map(self, mapfile):
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# See http://msdn.microsoft.com/en-us/library/k7xkk3e2.aspx
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last_addr = 0
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last_name = 0
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for line in file(mapfile, "rt"):
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fields = line.split()
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try:
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section_offset, name, addr, type, lib_object = fields
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except ValueError:
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continue
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if type != 'f':
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continue
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addr = int(addr, 16)
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name = self.demangle(name)
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if last_addr == addr:
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# TODO: handle collapsed functions
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#assert last_name == name
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continue
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self.symbols.append((addr, name))
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last_addr = addr
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last_name = name
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# sort symbols
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self.symbols.sort(key = lambda (addr, name): addr)
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def lookup_addr(self, addr):
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try:
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return self.symbol_cache[addr]
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except KeyError:
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pass
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tolerance = 4196
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s, e = 0, len(self.symbols)
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while s != e:
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i = (s + e)//2
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start_addr, name = self.symbols[i]
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try:
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end_addr, next_name = self.symbols[i + 1]
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except IndexError:
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end_addr = start_addr + tolerance
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if addr < start_addr:
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e = i
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continue
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if addr == end_addr:
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return next_name
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if addr > end_addr:
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s = i
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continue
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return name
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return "0x%08x" % addr
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def lookup_symbol(self, name):
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for symbol_addr, symbol_name in self.symbols:
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if name == symbol_name:
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return symbol_addr
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return 0
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def read_data(self, data):
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# TODO: compute these automatically
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caller_overhead = 672 - 2*144 # __debug_profile_reference2 - 2*__debug_profile_reference1
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callee_overhead = 144 # __debug_profile_reference1
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callee_overhead -= 48 # tolerance
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caller_overhead = callee_overhead
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fp = file(data, "rb")
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entry_format = "II"
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entry_size = struct.calcsize(entry_format)
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stack = []
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last_stamp = 0
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delta = 0
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while True:
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entry = fp.read(entry_size)
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if len(entry) < entry_size:
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break
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addr_exit, stamp = struct.unpack(entry_format, entry)
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if addr_exit == 0 and stamp == 0:
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break
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addr = addr_exit & 0xfffffffe
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exit = addr_exit & 0x00000001
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if self.base_addr is None:
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ref_addr = self.lookup_symbol('__debug_profile_reference2')
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if ref_addr:
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self.base_addr = addr - ref_addr
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else:
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self.base_addr = 0
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#print hex(self.base_addr)
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rel_addr = addr - self.base_addr
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#print hex(addr - self.base_addr)
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name = self.lookup_addr(rel_addr)
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stamp = self.unwrap_stamp(stamp)
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delta += stamp - last_stamp
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if not exit:
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if verbose >= 2:
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print "%10u >> 0x%08x" % (stamp, addr)
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if verbose:
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print "%10u >> %s" % (stamp, name)
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delta -= caller_overhead
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stack.append((name, stamp, delta))
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delta = 0
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else:
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if verbose >= 2:
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print "%10u << 0x%08x" % (stamp, addr)
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if len(stack):
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self_time = delta - callee_overhead
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entry_name, entry_stamp, delta = stack.pop()
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if entry_name != name:
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if verbose:
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print "%10u << %s" % (stamp, name)
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#assert entry_name == name
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break
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total_time = stamp - entry_stamp
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self.functions[entry_name] = self.functions.get(entry_name, 0) + self_time
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if verbose:
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print "%10u << %s %+u" % (stamp, name, self_time)
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else:
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delta = 0
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last_stamp = stamp
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def write_report(self):
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total = sum(self.functions.values())
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results = self.functions.items()
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results.sort(key = lambda (name, time): -time)
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for name, time in results:
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perc = float(time)/float(total)*100.0
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print "%6.03f %s" % (perc, name)
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def main():
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parser = optparse.OptionParser(
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usage="\n\t%prog [options] [file] ...",
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version="%%prog %s" % __version__)
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parser.add_option(
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'-m', '--map', metavar='FILE',
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type="string", dest="map",
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help="map file")
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parser.add_option(
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'-b', '--base', metavar='FILE',
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type="string", dest="base",
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help="base addr")
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parser.add_option(
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'-v', '--verbose',
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action="count",
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dest="verbose", default=0,
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help="verbose output")
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(options, args) = parser.parse_args(sys.argv[1:])
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global verbose
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verbose = options.verbose
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profile = Profile()
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if options.base is not None:
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profile.base_addr = int(options.base, 16)
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if options.map is not None:
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profile.read_map(options.map)
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for arg in args:
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profile.read_data(arg)
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profile.write_report()
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if __name__ == '__main__':
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main()
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