grokdump: Simple windows minidump analysis on linux.

tools/disasm.py

Index: tools/disasm.py
diff --git a/tools/disasm.py b/tools/disasm.py
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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"
+
+
+_COMMON_DISASM_OPTIONS = ["-M", "intel-mnemonic", "-C"]
+
+_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.
+}
+
+
+def GetDisasmLines(filename, offset, size, arch, inplace):
+  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_MAP[arch]
+    tmp_name = tempfile.mktemp(".v8code")
+    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 --start-address=%d --stop-address=%d -d %s " % (
+      OBJDUMP_BIN, ' '.join(_COMMON_DISASM_OPTIONS),
+      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