| #!/bin/bash -eu |
| # Copyright 2018 Google Inc. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| ################################################################################ |
| |
| pushd $SRC/Python-2.7.15/ |
| patch -p1 <<'EOF' |
| Index: v2_7_unstable/Python/pymath.c |
| =================================================================== |
| --- v2_7_unstable.orig/Python/pymath.c |
| +++ v2_7_unstable/Python/pymath.c |
| @@ -18,6 +18,7 @@ double _Py_force_double(double x) |
| /* inline assembly for getting and setting the 387 FPU control word on |
| gcc/x86 */ |
| |
| +__attribute__((no_sanitize_memory)) |
| unsigned short _Py_get_387controlword(void) { |
| unsigned short cw; |
| __asm__ __volatile__ ("fnstcw %0" : "=m" (cw)); |
| Index: v2_7_unstable/Modules/_ctypes/callproc.c |
| =================================================================== |
| --- v2_7_unstable.orig/Modules/_ctypes/callproc.c |
| +++ v2_7_unstable/Modules/_ctypes/callproc.c |
| @@ -1166,6 +1166,10 @@ PyObject *_ctypes_callproc(PPROC pProc, |
| |
| rtype = _ctypes_get_ffi_type(restype); |
| resbuf = alloca(max(rtype->size, sizeof(ffi_arg))); |
| + /* ffi_call actually initializes resbuf, but from asm, which |
| + * MemorySanitizer can't detect. Avoid false positives from MSan. */ |
| + if (resbuf != NULL) |
| + memset(resbuf, 0, max(rtype->size, sizeof(ffi_arg))); |
| |
| avalues = (void **)alloca(sizeof(void *) * argcount); |
| atypes = (ffi_type **)alloca(sizeof(ffi_type *) * argcount); |
| EOF |
| |
| if [ -e $OUT/sanpy/cflags -a "$(cat $OUT/sanpy/cflags)" = "${CFLAGS}" ] ; then |
| echo 'Python cflags unchanged, no need to rebuild' |
| else |
| rm -rf $OUT/sanpy |
| ASAN_OPTIONS=detect_leaks=0 ./configure --without-pymalloc \ |
| --prefix=$OUT/sanpy CFLAGS="${CFLAGS}" LINKCC="${CXX}" \ |
| LDFLAGS="${CXXFLAGS}" |
| grep -v HAVE_GETC_UNLOCKED < pyconfig.h > tmp && mv tmp pyconfig.h |
| ASAN_OPTIONS=detect_leaks=0 make && make install |
| echo "${CFLAGS}" > $OUT/sanpy/cflags |
| fi |
| popd |
| |
| cd contrib/fuzz |
| make clean oss-fuzz |