mirror of
https://github.com/nodejs/node.git
synced 2024-11-22 07:37:56 +01:00
115 lines
2.7 KiB
Python
Executable File
115 lines
2.7 KiB
Python
Executable File
#!/usr/bin/env python
|
|
|
|
#
|
|
# genv8constants.py output_file libv8_base.a
|
|
#
|
|
# Emits v8dbg constants stored in libv8_base.a in a format suitable for the V8
|
|
# ustack helper.
|
|
#
|
|
|
|
import re
|
|
import subprocess
|
|
import sys
|
|
import errno
|
|
|
|
if len(sys.argv) != 3:
|
|
print "usage: objsym.py outfile libv8_base.a"
|
|
sys.exit(2);
|
|
|
|
outfile = file(sys.argv[1], 'w');
|
|
try:
|
|
pipe = subprocess.Popen([ 'objdump', '-z', '-D', sys.argv[2] ],
|
|
bufsize=-1, stdout=subprocess.PIPE).stdout;
|
|
except OSError, e:
|
|
if e.errno == errno.ENOENT:
|
|
print '''
|
|
Node.js compile error: could not find objdump
|
|
|
|
Check that GNU binutils are installed and included in PATH
|
|
'''
|
|
else:
|
|
print 'problem running objdump: ', e.strerror
|
|
|
|
sys.exit()
|
|
|
|
pattern = re.compile('([0-9a-fA-F]{8}|[0-9a-fA-F]{16}) <(.*)>:');
|
|
v8dbg = re.compile('^v8dbg.*$')
|
|
numpattern = re.compile('^[0-9a-fA-F]{2} $');
|
|
octets = 4
|
|
|
|
outfile.write("""
|
|
/*
|
|
* File automatically generated by genv8constants. Do not edit.
|
|
*
|
|
* The following offsets are dynamically from libv8_base.a. See src/v8ustack.d
|
|
* for details on how these values are used.
|
|
*/
|
|
|
|
#ifndef V8_CONSTANTS_H
|
|
#define V8_CONSTANTS_H
|
|
|
|
""");
|
|
|
|
curr_sym = None;
|
|
curr_val = 0;
|
|
curr_octet = 0;
|
|
|
|
def out_reset():
|
|
global curr_sym, curr_val, curr_octet
|
|
curr_sym = None;
|
|
curr_val = 0;
|
|
curr_octet = 0;
|
|
|
|
def out_define():
|
|
global curr_sym, curr_val, curr_octet, outfile, octets
|
|
if curr_sym != None:
|
|
wrapped_val = curr_val & 0xffffffff;
|
|
if curr_val & 0x80000000 != 0:
|
|
wrapped_val = 0x100000000 - wrapped_val;
|
|
outfile.write("#define %s -0x%x\n" % (curr_sym.upper(), wrapped_val));
|
|
else:
|
|
outfile.write("#define %s 0x%x\n" % (curr_sym.upper(), wrapped_val));
|
|
out_reset();
|
|
|
|
for line in pipe:
|
|
if curr_sym != None:
|
|
#
|
|
# This bit of code has nasty knowledge of the objdump text output
|
|
# format, but this is the most obvious robust approach. We could almost
|
|
# rely on looking at numbered fields, but some instructions look very
|
|
# much like hex numbers (e.g., "adc"), and we don't want to risk picking
|
|
# those up by mistake, so we look at character-based columns intead.
|
|
#
|
|
for i in range (0, 3):
|
|
# 6-character margin, 2-characters + 1 space for each field
|
|
idx = 6 + i * 3;
|
|
octetstr = line[idx:idx+3]
|
|
if not numpattern.match(octetstr):
|
|
break;
|
|
|
|
if curr_octet > octets:
|
|
break;
|
|
|
|
curr_val += int('0x%s' % octetstr, 16) << (curr_octet * 8);
|
|
curr_octet += 1;
|
|
|
|
match = pattern.match(line)
|
|
if match == None:
|
|
continue;
|
|
|
|
# Print previous symbol
|
|
out_define();
|
|
|
|
v8match = v8dbg.match(match.group(2));
|
|
if v8match != None:
|
|
out_reset();
|
|
curr_sym = match.group(2);
|
|
|
|
# Print last symbol
|
|
out_define();
|
|
|
|
outfile.write("""
|
|
|
|
#endif /* V8_CONSTANTS_H */
|
|
""");
|