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Clean up some of our python scripts.

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Change-Id: Ifa75345db43434298cfb6113fbe2f7a33b88c79d
This commit is contained in:
Elliott Hughes
2014-08-20 11:16:11 -07:00
parent 55244a9bdb
commit dc1fb7000a
5 changed files with 151 additions and 271 deletions
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148
libc/tools/gensyscalls.py
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@@ -8,14 +8,18 @@ import atexit
import commands
import filecmp
import glob
import logging
import os.path
import re
import shutil
import stat
import string
import sys
import tempfile
from bionic_utils import *
all_arches = [ "arm", "arm64", "mips", "mips64", "x86", "x86_64" ]
# temp directory where we store all intermediate files
bionic_temp = tempfile.mkdtemp(prefix="bionic_gensyscalls");
@@ -387,6 +391,120 @@ def x86_64_genstub(syscall):
return result
class SysCallsTxtParser:
def __init__(self):
self.syscalls = []
self.lineno = 0
def E(self, msg):
print "%d: %s" % (self.lineno, msg)
def parse_line(self, line):
""" parse a syscall spec line.
line processing, format is
return type func_name[|alias_list][:syscall_name[:socketcall_id]] ( [paramlist] ) architecture_list
"""
pos_lparen = line.find('(')
E = self.E
if pos_lparen < 0:
E("missing left parenthesis in '%s'" % line)
return
pos_rparen = line.rfind(')')
if pos_rparen < 0 or pos_rparen <= pos_lparen:
E("missing or misplaced right parenthesis in '%s'" % line)
return
return_type = line[:pos_lparen].strip().split()
if len(return_type) < 2:
E("missing return type in '%s'" % line)
return
syscall_func = return_type[-1]
return_type = string.join(return_type[:-1],' ')
socketcall_id = -1
pos_colon = syscall_func.find(':')
if pos_colon < 0:
syscall_name = syscall_func
else:
if pos_colon == 0 or pos_colon+1 >= len(syscall_func):
E("misplaced colon in '%s'" % line)
return
# now find if there is a socketcall_id for a dispatch-type syscall
# after the optional 2nd colon
pos_colon2 = syscall_func.find(':', pos_colon + 1)
if pos_colon2 < 0:
syscall_name = syscall_func[pos_colon+1:]
syscall_func = syscall_func[:pos_colon]
else:
if pos_colon2+1 >= len(syscall_func):
E("misplaced colon2 in '%s'" % line)
return
syscall_name = syscall_func[(pos_colon+1):pos_colon2]
socketcall_id = int(syscall_func[pos_colon2+1:])
syscall_func = syscall_func[:pos_colon]
alias_delim = syscall_func.find('|')
if alias_delim > 0:
alias_list = syscall_func[alias_delim+1:].strip()
syscall_func = syscall_func[:alias_delim]
alias_delim = syscall_name.find('|')
if alias_delim > 0:
syscall_name = syscall_name[:alias_delim]
syscall_aliases = string.split(alias_list, ',')
else:
syscall_aliases = []
if pos_rparen > pos_lparen+1:
syscall_params = line[pos_lparen+1:pos_rparen].split(',')
params = string.join(syscall_params,',')
else:
syscall_params = []
params = "void"
t = {
"name" : syscall_name,
"func" : syscall_func,
"aliases" : syscall_aliases,
"params" : syscall_params,
"decl" : "%-15s %s (%s);" % (return_type, syscall_func, params),
"socketcall_id" : socketcall_id
}
# Parse the architecture list.
arch_list = line[pos_rparen+1:].strip()
if arch_list == "all":
for arch in all_arches:
t[arch] = True
else:
for arch in string.split(arch_list, ','):
if arch in all_arches:
t[arch] = True
else:
E("invalid syscall architecture '%s' in '%s'" % (arch, line))
return
self.syscalls.append(t)
logging.debug(t)
def parse_file(self, file_path):
logging.debug("parse_file: %s" % file_path)
fp = open(file_path)
for line in fp.xreadlines():
self.lineno += 1
line = line.strip()
if not line: continue
if line[0] == '#': continue
self.parse_line(line)
fp.close()
class State:
def __init__(self):
self.old_stubs = []
@@ -444,7 +562,7 @@ class State:
def gen_glibc_syscalls_h(self):
# TODO: generate a separate file for each architecture, like glibc's bits/syscall.h.
glibc_syscalls_h_path = "include/sys/glibc-syscalls.h"
D("generating " + glibc_syscalls_h_path)
logging.info("generating " + glibc_syscalls_h_path)
glibc_fp = create_file(glibc_syscalls_h_path)
glibc_fp.write("/* %s */\n" % warning)
glibc_fp.write("#ifndef _BIONIC_GLIBC_SYSCALLS_H_\n")
@@ -473,7 +591,7 @@ class State:
for arch in all_arches:
if syscall.has_key("asm-%s" % arch):
filename = "arch-%s/syscalls/%s.S" % (arch, syscall["func"])
D2(">>> generating " + filename)
logging.info(">>> generating " + filename)
fp = create_file(filename)
fp.write(syscall["asm-%s" % arch])
fp.close()
@@ -481,28 +599,28 @@ class State:
def regenerate(self):
D("scanning for existing architecture-specific stub files...")
logging.info("scanning for existing architecture-specific stub files...")
for arch in all_arches:
arch_dir = "arch-" + arch
D("scanning " + os.path.join(bionic_libc_root, arch_dir))
logging.info("scanning " + os.path.join(bionic_libc_root, arch_dir))
rel_path = os.path.join(arch_dir, "syscalls")
for file in os.listdir(os.path.join(bionic_libc_root, rel_path)):
if file.endswith(".S"):
self.old_stubs.append(os.path.join(rel_path, file))
D("found %d stub files" % len(self.old_stubs))
logging.info("found %d stub files" % len(self.old_stubs))
if not os.path.exists(bionic_temp):
D("creating %s..." % bionic_temp)
logging.info("creating %s..." % bionic_temp)
make_dir(bionic_temp)
D("re-generating stubs and support files...")
logging.info("re-generating stubs and support files...")
self.gen_glibc_syscalls_h()
self.gen_syscall_stubs()
D("comparing files...")
logging.info("comparing files...")
adds = []
edits = []
@@ -511,18 +629,18 @@ class State:
libc_file = os.path.join(bionic_libc_root, stub)
if not os.path.exists(libc_file):
# new file, git add it
D("new file: " + stub)
logging.info("new file: " + stub)
adds.append(libc_file)
shutil.copyfile(tmp_file, libc_file)
elif not filecmp.cmp(tmp_file, libc_file):
D("changed file: " + stub)
logging.info("changed file: " + stub)
edits.append(stub)
deletes = []
for stub in self.old_stubs:
if not stub in self.new_stubs:
D("deleted file: " + stub)
logging.info("deleted file: " + stub)
deletes.append(os.path.join(bionic_libc_root, stub))
if not DRY_RUN:
@@ -539,11 +657,11 @@ class State:
commands.getoutput("git add %s" % (os.path.join(bionic_libc_root, "SYSCALLS.TXT")))
if (not adds) and (not deletes) and (not edits):
D("no changes detected!")
logging.info("no changes detected!")
else:
D("ready to go!!")
logging.info("ready to go!!")
D_setlevel(1)
logging.basicConfig(level=logging.INFO)
state = State()
state.process_file(os.path.join(bionic_libc_root, "SYSCALLS.TXT"))