The attached patch eliminates PR 55521/sanitizer by switching libasan on
darwin
from using mach_override to mac function interposition via the importation of
the
asan/dynamic/asan_interceptors_dynamic.cc file from llvm.org's compiler-rt svn.
The changes involve defining USING_MAC_INTERPOSE in configure.ac rather than
rather than USING_MACH_OVERRIDE, introduction of the use of USING_MAC_INTERPOSE
in Makefile.am to avoid building the interception subdirectory, the passage of
-DMAC_INTERPOSE_FUNCTIONS in asan/Makefile.am when USING_MAC_INTERPOSE as well
as
the introduction of a -DMISSING_BLOCKS_SUPPORT flag to disable code that
requires
blocks support which FSF gcc lacks. The depreciated usage of
USING_MACH_OVERRIDE
is also removed from interception/Makefile.am. Bootstrapped on
x86_64-apple-darwin10,
x86_64-apple-darwin11 and x86_64-apple-darwin12. Passes...
make -k check RUNTESTFLAGS="asan.exp --target_board=unix'{-m32,-m64}'"
and fixes the previously failing cond1.C test case from PR55521 on all three
targets.
This revision adjusts the placement of the MAC_INTERPOSE_FUNCTIONS wrappers in
libsanitizer/asan/dynamic/asan_interceptors_dynamic.cc to allow interpose to
operate on those dispatch calls which don't require blocks support.
Okay for gcc trunk?
Jack
ps The switch from mach_override to mac function interposition reduces the
failures
in the g++ testsuite from 841 to 323. While this is higher than the 107 seen
with
x86_64 Fedora 15, the number of failures emitting ASAN:SIGSEGV messages is lower
on darwin at 8 compared to linux at 10.
2012-12-02 Kostya Serebryany k...@google.com
Jack Howarth <howa...@bromo.med.uc.edu>
/libsanitizer
PR 55521/sanitizer
* configure.ac: Define USING_MAC_INTERPOSE when on darwin.
* Makefile.am: Don't build interception subdir when
USING_MAC_INTERPOSE defined.
* asan/Makefile.am: Pass -DMAC_INTERPOSE_FUNCTIONS and
-DMISSING_BLOCKS_SUPPORT when USING_MAC_INTERPOSE defined.
Compile asan_interceptors_dynamic.cc but not libinterception
when USING_MAC_INTERPOSE defined.
* interception/Makefile.am: Remove usage of USING_MACH_OVERRIDE.
* configure: Regenerated.
* Makefile.in: Likewise.
* asan/Makefile.in: Likewise.
* interception/Makefile.in: Likewise.
* asan/asan_intercepted_functions.h: Use MISSING_BLOCKS_SUPPORT.
* asan/asan_mac.cc: Likewise.
* asan/dynamic/asan_interceptors_dynamic.cc: Migrate from llvm
and use MISSING_BLOCKS_SUPPORT.
Index: libsanitizer/asan/asan_mac.cc
===================================================================
--- libsanitizer/asan/asan_mac.cc (revision 194037)
+++ libsanitizer/asan/asan_mac.cc (working copy)
@@ -383,7 +383,7 @@ INTERCEPTOR(void, dispatch_group_async_f
asan_dispatch_call_block_and_release);
}
-#if MAC_INTERPOSE_FUNCTIONS
+#if defined(MAC_INTERPOSE_FUNCTIONS) && !defined(MISSING_BLOCKS_SUPPORT)
// dispatch_async, dispatch_group_async and others tailcall the corresponding
// dispatch_*_f functions. When wrapping functions with mach_override, those
// dispatch_*_f are intercepted automatically. But with dylib interposition
Index: libsanitizer/asan/asan_intercepted_functions.h
===================================================================
--- libsanitizer/asan/asan_intercepted_functions.h (revision 194037)
+++ libsanitizer/asan/asan_intercepted_functions.h (working copy)
@@ -203,7 +203,7 @@ DECLARE_FUNCTION_AND_WRAPPER(void, __CFI
DECLARE_FUNCTION_AND_WRAPPER(CFStringRef, CFStringCreateCopy,
CFAllocatorRef alloc, CFStringRef str);
DECLARE_FUNCTION_AND_WRAPPER(void, free, void* ptr);
-#if MAC_INTERPOSE_FUNCTIONS
+#if defined(MAC_INTERPOSE_FUNCTIONS) && !defined(MISSING_BLOCKS_SUPPORT)
DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_group_async,
dispatch_group_t dg,
dispatch_queue_t dq, void (^work)(void));
Index: libsanitizer/asan/Makefile.am
===================================================================
--- libsanitizer/asan/Makefile.am (revision 194037)
+++ libsanitizer/asan/Makefile.am (working copy)
@@ -4,6 +4,9 @@ AM_CPPFLAGS = -I $(top_srcdir)/include -
gcc_version := $(shell cat $(top_srcdir)/../gcc/BASE-VER)
DEFS = -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
-D__STDC_LIMIT_MACROS -DASAN_HAS_EXCEPTIONS=1
-DASAN_FLEXIBLE_MAPPING_AND_OFFSET=0 -DASAN_NEEDS_SEGV=1
+if USING_MAC_INTERPOSE
+DEFS += -DMAC_INTERPOSE_FUNCTIONS -DMISSING_BLOCKS_SUPPORT
+endif
AM_CXXFLAGS = -Wall -W -Wno-unused-parameter -Wwrite-strings -pedantic
-Wno-long-long -fPIC -fno-builtin -fno-exceptions -fomit-frame-pointer
-funwind-tables -fvisibility=hidden -Wno-variadic-macros -Wno-c99-extensions
ACLOCAL_AMFLAGS = -I $(top_srcdir) -I $(top_srcdir)/config
@@ -29,8 +32,14 @@ asan_files = \
asan_thread.cc \
asan_win.cc
-libasan_la_SOURCES = $(asan_files)
+libasan_la_SOURCES = $(asan_files)
+if USING_MAC_INTERPOSE
+libasan_la_SOURCES += dynamic/asan_interceptors_dynamic.cc
+libasan_la_LIBADD = $(top_builddir)/sanitizer_common/libsanitizer_common.la
$(top_builddir)/../libstdc++-v3/src/libstdc++.la
+else
libasan_la_LIBADD = $(top_builddir)/sanitizer_common/libsanitizer_common.la
$(top_builddir)/interception/libinterception.la
$(top_builddir)/../libstdc++-v3/src/libstdc++.la
+endif
+
libasan_la_LDFLAGS = -version-info `grep -v '^\#' $(srcdir)/libtool-version`
-lpthread -ldl
# Work around what appears to be a GNU make bug handling MAKEFLAGS
Index: libsanitizer/interception/Makefile.am
===================================================================
--- libsanitizer/interception/Makefile.am (revision 194037)
+++ libsanitizer/interception/Makefile.am (working copy)
@@ -14,11 +14,7 @@ interception_files = \
interception_mac.cc \
interception_win.cc
-if USING_MACH_OVERRIDE
-libinterception_la_SOURCES = $(interception_files)
mach_override/mach_override.c
-else
libinterception_la_SOURCES = $(interception_files)
-endif
# Work around what appears to be a GNU make bug handling MAKEFLAGS
# values defined in terms of make variables, as is the case for CC and
Index: libsanitizer/configure.ac
===================================================================
--- libsanitizer/configure.ac (revision 194037)
+++ libsanitizer/configure.ac (working copy)
@@ -81,10 +81,10 @@ unset TSAN_SUPPORTED
AM_CONDITIONAL(TSAN_SUPPORTED, [test "x$TSAN_SUPPORTED" = "xyes"])
case "$host" in
- *-*-darwin*) MACH_OVERRIDE=true ;;
- *) MACH_OVERRIDE=false ;;
+ *-*-darwin*) MAC_INTERPOSE=true ;;
+ *) MAC_INTERPOSE=false ;;
esac
-AM_CONDITIONAL(USING_MACH_OVERRIDE, $MACH_OVERRIDE)
+AM_CONDITIONAL(USING_MAC_INTERPOSE, $MAC_INTERPOSE)
AC_CONFIG_FILES([Makefile])
Index: libsanitizer/Makefile.am
===================================================================
--- libsanitizer/Makefile.am (revision 194037)
+++ libsanitizer/Makefile.am (working copy)
@@ -6,6 +6,10 @@ else
SUBDIRS = interception sanitizer_common asan
endif
+if USING_MAC_INTERPOSE
+SUBDIRS = sanitizer_common asan
+endif
+
# Work around what appears to be a GNU make bug handling MAKEFLAGS
# values defined in terms of make variables, as is the case for CC and
# friends when we are called from the top level Makefile.
--- /dev/null 2012-12-02 12:45:41.000000000 -0500
+++ libsanitizer/asan/dynamic/asan_interceptors_dynamic.cc 2012-12-02
12:33:14.000000000 -0500
@@ -0,0 +1,113 @@
+//===-- asan_interceptors_dynamic.cc
--------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// __DATA,__interpose section of the dynamic runtime library for Mac OS.
+//===----------------------------------------------------------------------===//
+
+#if defined(__APPLE__)
+
+#include "../asan_interceptors.h"
+#include "../asan_intercepted_functions.h"
+
+namespace __asan {
+
+#if !MAC_INTERPOSE_FUNCTIONS
+# error \
+ Dynamic interposing library should be built with -DMAC_INTERPOSE_FUNCTIONS
+#endif
+
+#define INTERPOSE_FUNCTION(function) \
+ { reinterpret_cast<const uptr>(WRAP(function)), \
+ reinterpret_cast<const uptr>(function) }
+
+#define INTERPOSE_FUNCTION_2(function, wrapper) \
+ { reinterpret_cast<const uptr>(wrapper), \
+ reinterpret_cast<const uptr>(function) }
+
+struct interpose_substitution {
+ const uptr replacement;
+ const uptr original;
+};
+
+__attribute__((used))
+const interpose_substitution substitutions[]
+ __attribute__((section("__DATA, __interpose"))) = {
+ INTERPOSE_FUNCTION(strlen),
+ INTERPOSE_FUNCTION(memcmp),
+ INTERPOSE_FUNCTION(memcpy),
+ INTERPOSE_FUNCTION(memmove),
+ INTERPOSE_FUNCTION(memset),
+ INTERPOSE_FUNCTION(strchr),
+ INTERPOSE_FUNCTION(strcat),
+ INTERPOSE_FUNCTION(strncat),
+ INTERPOSE_FUNCTION(strcpy),
+ INTERPOSE_FUNCTION(strncpy),
+ INTERPOSE_FUNCTION(pthread_create),
+ INTERPOSE_FUNCTION(longjmp),
+#if ASAN_INTERCEPT__LONGJMP
+ INTERPOSE_FUNCTION(_longjmp),
+#endif
+#if ASAN_INTERCEPT_SIGLONGJMP
+ INTERPOSE_FUNCTION(siglongjmp),
+#endif
+#if ASAN_INTERCEPT_STRDUP
+ INTERPOSE_FUNCTION(strdup),
+#endif
+#if ASAN_INTERCEPT_STRNLEN
+ INTERPOSE_FUNCTION(strnlen),
+#endif
+#if ASAN_INTERCEPT_INDEX
+ INTERPOSE_FUNCTION_2(index, WRAP(strchr)),
+#endif
+ INTERPOSE_FUNCTION(strcmp),
+ INTERPOSE_FUNCTION(strncmp),
+#if ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP
+ INTERPOSE_FUNCTION(strcasecmp),
+ INTERPOSE_FUNCTION(strncasecmp),
+#endif
+ INTERPOSE_FUNCTION(atoi),
+ INTERPOSE_FUNCTION(atol),
+ INTERPOSE_FUNCTION(strtol),
+#if ASAN_INTERCEPT_ATOLL_AND_STRTOLL
+ INTERPOSE_FUNCTION(atoll),
+ INTERPOSE_FUNCTION(strtoll),
+#endif
+#if ASAN_INTERCEPT_MLOCKX
+ INTERPOSE_FUNCTION(mlock),
+ INTERPOSE_FUNCTION(munlock),
+ INTERPOSE_FUNCTION(mlockall),
+ INTERPOSE_FUNCTION(munlockall),
+#endif
+#if MAC_INTERPOSE_FUNCTIONS
+ INTERPOSE_FUNCTION(dispatch_async_f),
+ INTERPOSE_FUNCTION(dispatch_sync_f),
+ INTERPOSE_FUNCTION(dispatch_after_f),
+ INTERPOSE_FUNCTION(dispatch_barrier_async_f),
+ INTERPOSE_FUNCTION(dispatch_group_async_f),
+#ifndef MISSING_BLOCKS_SUPPORT
+ INTERPOSE_FUNCTION(dispatch_group_async),
+ INTERPOSE_FUNCTION(dispatch_async),
+ INTERPOSE_FUNCTION(dispatch_after),
+ INTERPOSE_FUNCTION(dispatch_source_set_event_handler),
+ INTERPOSE_FUNCTION(dispatch_source_set_cancel_handler),
+#endif
+#endif
+ INTERPOSE_FUNCTION(signal),
+ INTERPOSE_FUNCTION(sigaction),
+
+ INTERPOSE_FUNCTION(__CFInitialize),
+ INTERPOSE_FUNCTION(CFStringCreateCopy),
+ INTERPOSE_FUNCTION(free),
+};
+
+} // namespace __asan
+
+#endif // __APPLE__
