libsanitizer: Add option to bootstrap using HWASAN

This is an analogous option to --bootstrap-asan to configure.  It allows
bootstrapping GCC using HWASAN.

For the same reasons as for ASAN we have to avoid using the HWASAN
sanitizer when compiling libiberty and the lto-plugin.

Also add a function to query whether -fsanitize=hwaddress has been
passed.

ChangeLog:

	* configure: Regenerate.
	* configure.ac: Add --bootstrap-hwasan option.

config/ChangeLog:

	* bootstrap-hwasan.mk: New file.

gcc/ChangeLog:

	* doc/install.texi: Document new option.

libiberty/ChangeLog:

	* configure: Regenerate.
	* configure.ac: Avoid using sanitizer.

lto-plugin/ChangeLog:

	* Makefile.am: Avoid using sanitizer.
	* Makefile.in: Regenerate.

diff --git a/config/bootstrap-hwasan.mk b/config/bootstrap-hwasan.mk
new file mode 100644 (file)
index 0000000..4f60bed
--- /dev/null
+++ b/config/bootstrap-hwasan.mk
@@ -0,0 +1,8 @@
+# This option enables -fsanitize=hwaddress for stage2 and stage3.
+
+STAGE2_CFLAGS += -fsanitize=hwaddress
+STAGE3_CFLAGS += -fsanitize=hwaddress
+POSTSTAGE1_LDFLAGS += -fsanitize=hwaddress -static-libhwasan \
+                     -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ \
+                     -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/hwasan/ \
+                     -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/hwasan/.libs

diff --git a/configure b/configure
index a2ea1a329b69de06906315e54a49c694c9704522..b41a258c80ee9f289de534185eb364bcb5ca6ae5 100755 (executable)
--- a/configure
+++ b/configure
@@ -9305,7 +9305,7 @@ fi
 # or bootstrap-ubsan, bootstrap it.
 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
   case "$BUILD_CONFIG" in
-    *bootstrap-asan* | *bootstrap-ubsan* )
+    *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
       bootstrap_fixincludes=yes
       ;;

diff --git a/configure.ac b/configure.ac
index 44fa75f3a329ef68f6800c8e09d49a9373f731cf..944f30cfea84e9266b4322df7902b867882d4d8c 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2814,7 +2814,7 @@ fi
 # or bootstrap-ubsan, bootstrap it.
 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
   case "$BUILD_CONFIG" in
-    *bootstrap-asan* | *bootstrap-ubsan* )
+    *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
       bootstrap_fixincludes=yes
       ;;

diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 8c55da373f81fab1a2b37f5f8e44bc1488226745..5f879ca4cea863e8bfc4cf5512b6963a5e49c7aa 100644 (file)
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -2805,6 +2805,11 @@ the build tree.
 Compiles GCC itself using Address Sanitization in order to catch invalid memory
 accesses within the GCC code.
 
+@item @samp{bootstrap-hwasan}
+Compiles GCC itself using HWAddress Sanitization in order to catch invalid
+memory accesses within the GCC code.  This option is only available on AArch64
+systems that are running Linux kernel version 5.4 or later.
+
 @end table
 
 @section Building a cross compiler

diff --git a/libiberty/configure b/libiberty/configure
index ff93c9ee9a6fa9c6bb1938bcdfffb2d0ae8c9698..b6af9baf21204a323cad0e7b40a426c72988ba3b 100755 (executable)
--- a/libiberty/configure
+++ b/libiberty/configure
@@ -5264,6 +5264,7 @@ fi
 NOASANFLAG=
 case " ${CFLAGS} " in
   *\ -fsanitize=address\ *) NOASANFLAG=-fno-sanitize=address ;;
+  *\ -fsanitize=hwaddress\ *) NOASANFLAG=-fno-sanitize=hwaddress ;;
 esac
 
 

diff --git a/libiberty/configure.ac b/libiberty/configure.ac
index 4e2599c14a89bafcb8c7e523b9ce5b3d60b8c0f6..ad952963971a31968b5d109661b9cab0aa4b95fc 100644 (file)
--- a/libiberty/configure.ac
+++ b/libiberty/configure.ac
@@ -240,6 +240,7 @@ AC_SUBST(PICFLAG)
 NOASANFLAG=
 case " ${CFLAGS} " in
   *\ -fsanitize=address\ *) NOASANFLAG=-fno-sanitize=address ;;
+  *\ -fsanitize=hwaddress\ *) NOASANFLAG=-fno-sanitize=hwaddress ;;
 esac
 AC_SUBST(NOASANFLAG)
 

diff --git a/lto-plugin/Makefile.am b/lto-plugin/Makefile.am
index 204b25f45ef2f22bb246641a2aa9f9d09719737b..8b20e1d1d87e2dda9f37763492ddf39a8022c48c 100644 (file)
--- a/lto-plugin/Makefile.am
+++ b/lto-plugin/Makefile.am
@@ -11,8 +11,8 @@ AM_CPPFLAGS = -I$(top_srcdir)/../include $(DEFS)
 AM_CFLAGS = @ac_lto_plugin_warn_cflags@ $(CET_HOST_FLAGS)
 AM_LDFLAGS = @ac_lto_plugin_ldflags@
 AM_LIBTOOLFLAGS = --tag=disable-static
-override CFLAGS := $(filter-out -fsanitize=address,$(CFLAGS))
-override LDFLAGS := $(filter-out -fsanitize=address,$(LDFLAGS))
+override CFLAGS := $(filter-out -fsanitize=address -fsanitize=hwaddress,$(CFLAGS))
+override LDFLAGS := $(filter-out -fsanitize=address -fsanitize=hwaddress,$(LDFLAGS))
 
 libexecsub_LTLIBRARIES = liblto_plugin.la
 gcc_build_dir = @gcc_build_dir@

diff --git a/lto-plugin/Makefile.in b/lto-plugin/Makefile.in
index 834699b439e03cd1213c4b7fe1867ff7b5f19e98..20611c6b1e6f5e381d4690e34ab7a69f2c827bb6 100644 (file)
--- a/lto-plugin/Makefile.in
+++ b/lto-plugin/Makefile.in
@@ -675,8 +675,8 @@ uninstall-am: uninstall-libexecsubLTLIBRARIES
 
 .PRECIOUS: Makefile
 
-override CFLAGS := $(filter-out -fsanitize=address,$(CFLAGS))
-override LDFLAGS := $(filter-out -fsanitize=address,$(LDFLAGS))
+override CFLAGS := $(filter-out -fsanitize=address -fsanitize=hwaddress,$(CFLAGS))
+override LDFLAGS := $(filter-out -fsanitize=address -fsanitize=hwaddress,$(LDFLAGS))
 
 all-local: $(in_gcc_libs)