1 files changed, 95 insertions, 0 deletions
diff --git a/gnu/llvm/compiler-rt/lib/dfsan/scripts/build-libc-list.py b/gnu/llvm/compiler-rt/lib/dfsan/scripts/build-libc-list.py
new file mode 100755
index 00000000000..40805c01916
--- /dev/null
+++ b/gnu/llvm/compiler-rt/lib/dfsan/scripts/build-libc-list.py
@@ -0,0 +1,95 @@
+#!/usr/bin/env python
+#===- lib/dfsan/scripts/build-libc-list.py ---------------------------------===#
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+#===------------------------------------------------------------------------===#
+# The purpose of this script is to identify every function symbol in a set of
+# libraries (in this case, libc and libgcc) so that they can be marked as
+# uninstrumented, thus allowing the instrumentation pass to treat calls to those
+# functions correctly.
+
+import os
+import subprocess
+import sys
+from optparse import OptionParser
+
+def defined_function_list(object):
+  functions = []
+  readelf_proc = subprocess.Popen(['readelf', '-s', '-W', object],
+                                  stdout=subprocess.PIPE)
+  readelf = readelf_proc.communicate()[0].split('\n')
+  if readelf_proc.returncode != 0:
+    raise subprocess.CalledProcessError(readelf_proc.returncode, 'readelf')
+  for line in readelf:
+    if (line[31:35] == 'FUNC' or line[31:36] == 'IFUNC') and \
+       line[39:44] != 'LOCAL' and \
+       line[55:58] != 'UND':
+      function_name = line[59:].split('@')[0]
+      functions.append(function_name)
+  return functions
+
+p = OptionParser()
+
+p.add_option('--libc-dso-path', metavar='PATH',
+             help='path to libc DSO directory',
+             default='/lib/x86_64-linux-gnu')
+p.add_option('--libc-archive-path', metavar='PATH',
+             help='path to libc archive directory',
+             default='/usr/lib/x86_64-linux-gnu')
+
+p.add_option('--libgcc-dso-path', metavar='PATH',
+             help='path to libgcc DSO directory',
+             default='/lib/x86_64-linux-gnu')
+p.add_option('--libgcc-archive-path', metavar='PATH',
+             help='path to libgcc archive directory',
+             default='/usr/lib/gcc/x86_64-linux-gnu/4.6')
+
+p.add_option('--with-libstdcxx', action='store_true',
+             dest='with_libstdcxx',
+             help='include libstdc++ in the list (inadvisable)')
+p.add_option('--libstdcxx-dso-path', metavar='PATH',
+             help='path to libstdc++ DSO directory',
+             default='/usr/lib/x86_64-linux-gnu')
+
+(options, args) = p.parse_args()
+
+libs = [os.path.join(options.libc_dso_path, name) for name in
+        ['ld-linux-x86-64.so.2',
+         'libanl.so.1',
+         'libBrokenLocale.so.1',
+         'libcidn.so.1',
+         'libcrypt.so.1',
+         'libc.so.6',
+         'libdl.so.2',
+         'libm.so.6',
+         'libnsl.so.1',
+         'libpthread.so.0',
+         'libresolv.so.2',
+         'librt.so.1',
+         'libthread_db.so.1',
+         'libutil.so.1']]
+libs += [os.path.join(options.libc_archive_path, name) for name in
+         ['libc_nonshared.a',
+          'libpthread_nonshared.a']]
+
+libs.append(os.path.join(options.libgcc_dso_path, 'libgcc_s.so.1'))
+libs.append(os.path.join(options.libgcc_archive_path, 'libgcc.a'))
+
+if options.with_libstdcxx:
+  libs.append(os.path.join(options.libstdcxx_dso_path, 'libstdc++.so.6'))
+
+functions = []
+for l in libs:
+  if os.path.exists(l):
+    functions += defined_function_list(l)
+  else:
+    print >> sys.stderr, 'warning: library %s not found' % l
+
+functions = list(set(functions))
+functions.sort()
+
+for f in functions:
+  print 'fun:%s=uninstrumented' % f