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#!/usr/bin/env python
#
# Copyright 2011 the V8 project authors. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import os
import re
import subprocess
import tempfile
# Avoid using the slow (google-specific) wrapper around objdump.
OBJDUMP_BIN = "/usr/bin/objdump"
if not os.path.exists(OBJDUMP_BIN):
OBJDUMP_BIN = "objdump"
# -M intel-mnemonic selects Intel syntax.
# -C demangles.
# -z disables skipping over sections of zeroes.
_COMMON_DISASM_OPTIONS = ["-M", "intel-mnemonic", "-C", "-z"]
_DISASM_HEADER_RE = re.compile(r"[a-f0-9]+\s+<.*:$")
_DISASM_LINE_RE = re.compile(r"\s*([a-f0-9]+):\s*(\S.*)")
# Keys must match constants in Logger::LogCodeInfo.
_ARCH_MAP = {
"ia32": "-m i386",
"x64": "-m i386 -M x86-64",
"arm": "-m arm", # Not supported by our objdump build.
"mips": "-m mips", # Not supported by our objdump build.
"arm64": "-m aarch64"
}
def GetDisasmLines(filename, offset, size, arch, inplace, arch_flags=""):
tmp_name = None
if not inplace:
# Create a temporary file containing a copy of the code.
assert arch in _ARCH_MAP, "Unsupported architecture '%s'" % arch
arch_flags = arch_flags + " " + _ARCH_MAP[arch]
tmp_file = tempfile.NamedTemporaryFile(prefix=".v8code", delete=False)
tmp_name = tmp_file.name
tmp_file.close()
command = "dd if=%s of=%s bs=1 count=%d skip=%d && " \
"%s %s -D -b binary %s %s" % (
filename, tmp_name, size, offset,
OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), arch_flags,
tmp_name)
else:
command = "%s %s %s --start-address=%d --stop-address=%d -d %s " % (
OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS), arch_flags,
offset,
offset + size,
filename)
process = subprocess.Popen(command,
shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
out, err = process.communicate()
lines = out.split("\n")
header_line = 0
for i, line in enumerate(lines):
if _DISASM_HEADER_RE.match(line):
header_line = i
break
if tmp_name:
os.unlink(tmp_name)
split_lines = []
for line in lines[header_line + 1:]:
match = _DISASM_LINE_RE.match(line)
if match:
line_address = int(match.group(1), 16)
split_lines.append((line_address, match.group(2)))
return split_lines
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