ld: Pass -fno-sanitize=all to tests with linker

When binutils is compiled with -fsanitize=undefined, many tests with
linker, instead of $CC, fail with undefined symbol references to sanitize
library.  Define NOSANTIZE_CFLAGS to -fno-sanitize=all if target compiler
supports it and compile such tests with $NOSANTIZE_CFLAGS.

	* testsuite/config/default.exp (NOSANTIZE_CFLAGS): New.
	* testsuite/ld-elf/linux-x86.exp: Add $NOSANTIZE_CFLAGS to
	tests with run_ld_link_exec_tests.
	* testsuite/ld-elf/shared.exp: Add $NOSANTIZE_CFLAGS to tests
	with run_ld_link_tests.
	* testsuite/ld-elf/tls.exp: Likewise.
	* testsuite/ld-elfweak/elfweak.exp: Add $NOSANTIZE_CFLAGS to
	tests with ld_link.
	* testsuite/ld-gc/gc.exp: Add $NOSANTIZE_CFLAGS to cflags.
	* testsuite/ld-plugin/lto.exp: Add $NOSANTIZE_CFLAGS to tests
	with run_ld_link_tests.a
	* testsuite/ld-plugin/plugin.exp: Append $NOSANTIZE_CFLAGS to
	CFLAGS.
	* testsuite/ld-selective/selective.exp: Add $NOSANTIZE_CFLAGS
	to cflags and cxxflags.
	* testsuite/ld-srec/srec.exp: Append $NOSANTIZE_CFLAGS to CC
	and CXX.
	* testsuite/ld-x86-64/plt-main-ibt-x32.dd: Updated for
	-fsanitize=undefined.
	* testsuite/ld-x86-64/plt-main-ibt.dd: Likewise.
	* testsuite/ld-x86-64/x86-64.exp: Add $NOSANTIZE_CFLAGS to
	tests with run_cc_link_tests and run_ld_link_tests.

14 files changed, 121 insertions, 32 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 799f213..a0d7597 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,28 @@
+2020-06-03  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* testsuite/config/default.exp (NOSANTIZE_CFLAGS): New.
+	* testsuite/ld-elf/linux-x86.exp: Add $NOSANTIZE_CFLAGS to
+	tests with run_ld_link_exec_tests.
+	* testsuite/ld-elf/shared.exp: Add $NOSANTIZE_CFLAGS to tests
+	with run_ld_link_tests.
+	* testsuite/ld-elf/tls.exp: Likewise.
+	* testsuite/ld-elfweak/elfweak.exp: Add $NOSANTIZE_CFLAGS to
+	tests with ld_link.
+	* testsuite/ld-gc/gc.exp: Add $NOSANTIZE_CFLAGS to cflags.
+	* testsuite/ld-plugin/lto.exp: Add $NOSANTIZE_CFLAGS to tests
+	with run_ld_link_tests.a
+	* testsuite/ld-plugin/plugin.exp: Append $NOSANTIZE_CFLAGS to
+	CFLAGS.
+	* testsuite/ld-selective/selective.exp: Add $NOSANTIZE_CFLAGS
+	to cflags and cxxflags.
+	* testsuite/ld-srec/srec.exp: Append $NOSANTIZE_CFLAGS to CC
+	and CXX.
+	* testsuite/ld-x86-64/plt-main-ibt-x32.dd: Updated for
+	-fsanitize=undefined.
+	* testsuite/ld-x86-64/plt-main-ibt.dd: Likewise.
+	* testsuite/ld-x86-64/x86-64.exp: Add $NOSANTIZE_CFLAGS to
+	tests with run_cc_link_tests and run_ld_link_tests.
+
 2020-06-03  Fangrui Song  <maskray@google.com>
 	    H.J. Lu  <hongjiu.lu@intel.com>
 
diff --git a/ld/testsuite/config/default.exp b/ld/testsuite/config/default.exp
index 5b7ca7a..4f0b76d 100644
--- a/ld/testsuite/config/default.exp
+++ b/ld/testsuite/config/default.exp
@@ -579,3 +579,41 @@ if { ![info exists STATIC_PIE_LDFLAGS] } then {
 	set STATIC_PIE_LDFLAGS ""
     }
 }
+
+# Set NOSANTIZE_CFLAGS to "-fno-sanitize=all" if target compiler
+# supports it.
+
+if { ![info exists NOSANTIZE_CFLAGS] } then {
+    if { [check_compiler_available] } {
+	# Check if gcc supports -fno-sanitize=all.
+	set flags ""
+	if [board_info [target_info name] exists cflags] {
+	    append flags " [board_info [target_info name] cflags]"
+	}
+	if [board_info [target_info name] exists ldflags] {
+	    append flags " [board_info [target_info name] ldflags]"
+	}
+
+	set basename "tmpdir/available[pid]"
+	set src ${basename}.c
+	set output ${basename}
+	set f [open $src "w"]
+	puts $f "int main (void) { return 0; }"
+	close $f
+	if [is_remote host] {
+	    set src [remote_download host $src]
+	}
+	set available [run_host_cmd_yesno "$CC" "$flags -fno-sanitize=all $src -o $output"]
+	remote_file host delete $src
+	remote_file host delete $output
+	file delete $src
+
+	if { $available == 1 } then {
+	    set NOSANTIZE_CFLAGS "-fno-sanitize=all"
+	} else {
+	    set NOSANTIZE_CFLAGS ""
+	}
+    } else {
+	set NOSANTIZE_CFLAGS ""
+    }
+}
diff --git a/ld/testsuite/ld-elf/linux-x86.exp b/ld/testsuite/ld-elf/linux-x86.exp
index fef788f..39322df 100644
--- a/ld/testsuite/ld-elf/linux-x86.exp
+++ b/ld/testsuite/ld-elf/linux-x86.exp
@@ -56,6 +56,7 @@ if { ![isnative] || ![check_compiler_available] } {
 global PLT_CFLAGS
 # Add $NOPIE_CFLAGS and $NOPIE_LDFLAGS if non-PIE is required.
 global NOPIE_CFLAGS NOPIE_LDFLAGS
+global NOSANTIZE_CFLAGS
 
 run_ld_link_exec_tests [list \
     [list \
@@ -65,7 +66,7 @@ run_ld_link_exec_tests [list \
 	{ linux-x86.S pr23428.c dummy.s } \
 	"pr23428" \
 	"pass.out" \
-	"$NOPIE_CFLAGS -fno-asynchronous-unwind-tables" \
+	"$NOPIE_CFLAGS $NOSANTIZE_CFLAGS -fno-asynchronous-unwind-tables" \
 	"asm" \
     ] \
 ]
diff --git a/ld/testsuite/ld-elf/shared.exp b/ld/testsuite/ld-elf/shared.exp
index 5606c99..fe7a56d 100644
--- a/ld/testsuite/ld-elf/shared.exp
+++ b/ld/testsuite/ld-elf/shared.exp
@@ -33,6 +33,7 @@ if ![check_shared_lib_support] {
 
 # Add $NOPIE_CFLAGS and $NOPIE_LDFLAGS if non-PIE is required.
 global NOPIE_CFLAGS NOPIE_LDFLAGS
+global NOSANTIZE_CFLAGS
 
 set old_ASFLAGS $ASFLAGS
 
@@ -1510,7 +1511,7 @@ if { ([istarget "*-*-linux*"]
 	    { pr23161a.c } \
 	    {{readelf {--dyn-syms -rW} pr23161a.rd}} \
 	    "libpr23161a.so" \
-	    "-fPIC -O2" \
+	    "-fPIC -O2 $NOSANTIZE_CFLAGS" \
 	] \
 	[list \
 	    "Build pr23161a" \
@@ -1520,7 +1521,7 @@ if { ([istarget "*-*-linux*"]
 	    { pr23161b.c } \
 	    {{readelf {--dyn-syms -rW} pr23161b.rd}} \
 	    "pr23161a" \
-	    "-fPIC -O0" \
+	    "-fPIC -O0 $NOSANTIZE_CFLAGS" \
 	] \
 	[list \
 	    "Build libpr23161b.so" \
@@ -1530,7 +1531,7 @@ if { ([istarget "*-*-linux*"]
 	    { pr23161a.c } \
 	    {{readelf {--dyn-syms -rW} pr23161a.rd}} \
 	    "libpr23161b.so" \
-	    "-fPIC -O2" \
+	    "-fPIC -O2 $NOSANTIZE_CFLAGS" \
 	] \
 	[list \
 	    "Build pr23161b" \
@@ -1540,7 +1541,7 @@ if { ([istarget "*-*-linux*"]
 	    { pr23161b.c } \
 	    {{readelf {--dyn-syms -rW} pr23161b.rd}} \
 	    "pr23161b" \
-	    "-fPIC -O0" \
+	    "-fPIC -O0 $NOSANTIZE_CFLAGS" \
 	] \
     ]
 }
@@ -1556,7 +1557,7 @@ if { [istarget "i?86-*-*"]
 	    { pr23161c.c } \
 	    {{readelf {--dyn-syms -rW} pr23161c.rd}} \
 	    "libpr23161c.so" \
-	    "-fPIC -O2" \
+	    "-fPIC -O2 $NOSANTIZE_CFLAGS" \
 	] \
 	[list \
 	    "Build pr23161c" \
@@ -1566,7 +1567,7 @@ if { [istarget "i?86-*-*"]
 	    { pr23161b.c } \
 	    {{readelf {--dyn-syms -rW} pr23161d.rd}} \
 	    "pr23161c" \
-	    "-fPIC -O0" \
+	    "-fPIC -O0 $NOSANTIZE_CFLAGS" \
 	] \
     ]
 }
diff --git a/ld/testsuite/ld-elf/tls.exp b/ld/testsuite/ld-elf/tls.exp
index 380d650..352d7ec 100644
--- a/ld/testsuite/ld-elf/tls.exp
+++ b/ld/testsuite/ld-elf/tls.exp
@@ -39,6 +39,8 @@ if [istarget "sparc*-*-*"] {
     append AFLAGS_PIC " -K PIC"
 }
 
+global NOSANTIZE_CFLAGS
+
 run_ld_link_tests [list \
     [list \
 	"Build pr22263-1" \
@@ -48,6 +50,6 @@ run_ld_link_tests [list \
 	{ pr22263-1a.c pr22263-1b.c } \
 	{{readelf -r pr22263-1.rd}} \
 	"pr22263-1" \
-	"-fPIE -O2" \
+	"-fPIE -O2 $NOSANTIZE_CFLAGS" \
     ] \
 ]
diff --git a/ld/testsuite/ld-elfweak/elfweak.exp b/ld/testsuite/ld-elfweak/elfweak.exp
index dc38767..f9e2b3e 100644
--- a/ld/testsuite/ld-elfweak/elfweak.exp
+++ b/ld/testsuite/ld-elfweak/elfweak.exp
@@ -65,6 +65,7 @@ set DOBJDUMP_FLAGS --dynamic-syms
 set SOBJDUMP_FLAGS --syms
 set shared "--shared -Wl,--no-as-needed"
 
+global NOSANTIZE_CFLAGS
 
 #
 # objdump_symstuff
@@ -306,13 +307,14 @@ proc build_exec { test execname objs flags dat dynsymexp symexp} {
     global srcdir
     global subdir
     global exec_output
+    global NOSANTIZE_CFLAGS
 
     set files ""
     foreach obj $objs {
       set files "$files $tmpdir/$obj"
     }
 
-    if {![ld_link $CC $tmpdir/$execname "$flags $files"]} {
+    if {![ld_link $CC $tmpdir/$execname "$flags $NOSANTIZE_CFLAGS $files"]} {
 	fail "$test"
 	return
     }
@@ -439,7 +441,7 @@ run_dump_test $srcdir/$subdir/size2
 
 if {![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/alias.c $tmpdir/alias.o]
     || ![ld_link $CC $tmpdir/alias.so "$shared $tmpdir/alias.o"]
-    || ![ld_compile "$CC $CFLAGS" $srcdir/$subdir/aliasmain.c $tmpdir/aliasmain.o]
+    || ![ld_compile "$CC $CFLAGS $NOSANTIZE_CFLAGS" $srcdir/$subdir/aliasmain.c $tmpdir/aliasmain.o]
     || ![ld_compile "$CC $CFLAGS" $srcdir/$subdir/weakref1.c $tmpdir/weakref1.o]
     || ![ld_compile "$CC $CFLAGS" $srcdir/$subdir/weakref2.c $tmpdir/weakref2.o]} then {
     unresolved "ELF weak (alias)"
diff --git a/ld/testsuite/ld-gc/gc.exp b/ld/testsuite/ld-gc/gc.exp
index 5913f1f..16ded5d 100644
--- a/ld/testsuite/ld-gc/gc.exp
+++ b/ld/testsuite/ld-gc/gc.exp
@@ -23,7 +23,9 @@ if ![check_gc_sections_available] {
     return
 }
 
-set cflags "-ffunction-sections -fdata-sections"
+global NOSANTIZE_CFLAGS
+
+set cflags "-ffunction-sections -fdata-sections $NOSANTIZE_CFLAGS"
 set objfile "tmpdir/gc.o"
 
 # Add $NOPIE_CFLAGS and $NOPIE_LDFLAGS if non-PIE is required.
diff --git a/ld/testsuite/ld-plugin/lto.exp b/ld/testsuite/ld-plugin/lto.exp
index 8ffc03f..d888854 100644
--- a/ld/testsuite/ld-plugin/lto.exp
+++ b/ld/testsuite/ld-plugin/lto.exp
@@ -38,6 +38,8 @@ set saved_CXXFLAGS "$CXXFLAGS"
 regsub -all "(\\-Wp,)?-D_FORTIFY_SOURCE=\[0-9\]+" $CFLAGS "" CFLAGS
 regsub -all "(\\-Wp,)?-D_FORTIFY_SOURCE=\[0-9\]+" $CXXFLAGS "" CXXFLAGS
 
+global NOSANTIZE_CFLAGS
+
 proc restore_notify { } {
   global saved_CFLAGS
   global saved_CXXFLAGS
@@ -74,10 +76,11 @@ set lto_link_tests [list \
    "-O2 -flto -fuse-linker-plugin" "-flto -fuse-linker-plugin" \
    {lto-1a.c lto-1b.c} {} "lto-1.exe"] \
   [list "Compile 2" \
-   "" "-O2 -flto -fuse-linker-plugin" \
+   "" "-O2 -flto -fuse-linker-plugin $NOSANTIZE_CFLAGS" \
    {lto-2.c} {} ""] \
   [list "LTO 2" \
-   "-static -O2 -flto -fuse-linker-plugin tmpdir/lto-2.o -lm" "" \
+   "-static -O2 -flto -fuse-linker-plugin tmpdir/lto-2.o -lm" \
+   "$NOSANTIZE_CFLAGS" \
    {dummy.c} {} "lto-2.exe"] \
   [list "Compile 3a" \
    "" "-flto" \
@@ -143,10 +146,11 @@ set lto_link_tests [list \
    "" "" \
    {pr12758a.s} {} ""] \
   [list "Build libpr12758.a" \
-   "" "-flto -O2 $lto_fat" \
+   "" "-flto -O2 $lto_fat $NOSANTIZE_CFLAGS" \
    {pr12758b.c} {} "libpr12758.a"] \
   [list "PR ld/12758" \
-   "-O2 -Wl,-e,foo -nostdlib -flto -fuse-linker-plugin tmpdir/pr12758a.o -Wl,--start-group tmpdir/libpr12758.a -Wl,--end-group" "" \
+   "-O2 -Wl,-e,foo -nostdlib -flto -fuse-linker-plugin tmpdir/pr12758a.o -Wl,--start-group tmpdir/libpr12758.a -Wl,--end-group" \
+   "$NOSANTIZE_CFLAGS" \
    {dummy.c} {} "pr12758.exe"] \
   [list "Compile PR ld/12760" \
    "" "-g -O0" \
diff --git a/ld/testsuite/ld-plugin/plugin.exp b/ld/testsuite/ld-plugin/plugin.exp
index 8373e93..381fc79 100644
--- a/ld/testsuite/ld-plugin/plugin.exp
+++ b/ld/testsuite/ld-plugin/plugin.exp
@@ -95,6 +95,9 @@ if { [istarget m681*-*-*] || [istarget m68hc1*-*-*] || [istarget m9s12x*-*-*] }
 set failed_compile 0
 set _ ""
 set plugin_nm_output ""
+global NOSANTIZE_CFLAGS
+set old_CFLAGS "$CFLAGS"
+append CFLAGS " $NOSANTIZE_CFLAGS"
 if { $can_compile && \
 	(![ld_compile "$CC $CFLAGS" $srcdir/$subdir/main.c tmpdir/main.o] \
 	|| ![ld_compile "$CC $CFLAGS" $srcdir/$subdir/func.c tmpdir/func.o] \
@@ -105,6 +108,7 @@ if { $can_compile && \
     # Defer fail until we have list of tests set.
     set failed_compile 1
 }
+set CFLAGS "$old_CFLAGS"
 
 set dotsym 0
 if { $can_compile && !$failed_compile } {
diff --git a/ld/testsuite/ld-selective/selective.exp b/ld/testsuite/ld-selective/selective.exp
index a12336b..f25b0e2 100644
--- a/ld/testsuite/ld-selective/selective.exp
+++ b/ld/testsuite/ld-selective/selective.exp
@@ -46,8 +46,9 @@ set seltests {
     {A::foo() B::foo() dropme1() dropme2()} {*-*-*}}
 }
 
-set cflags "-w -O -ffunction-sections -fdata-sections"
-set cxxflags "-fno-exceptions -fno-rtti"
+global NOSANTIZE_CFLAGS
+set cflags "-w -O -ffunction-sections -fdata-sections $NOSANTIZE_CFLAGS"
+set cxxflags "-fno-exceptions -fno-rtti $NOSANTIZE_CFLAGS"
 set ldflags "--gc-sections -Bstatic"
 
 if [istarget mips*-*] {
diff --git a/ld/testsuite/ld-srec/srec.exp b/ld/testsuite/ld-srec/srec.exp
index da230fb..0d607f5 100644
--- a/ld/testsuite/ld-srec/srec.exp
+++ b/ld/testsuite/ld-srec/srec.exp
@@ -351,11 +351,12 @@ if { ![check_compiler_available] } {
 # Pass -fplt to CC and CXX since -fno-plt doesn't work with S-records
 # tests. Also add $NOPIE_CFLAGS and $NOPIE_LDFLAGS if PIE doesn't work
 # with S-records.  Also add $NOCF_PROTECTION_CFLAGS for S-records.
-global PLT_CFLAGS NOPIE_CFLAGS NOPIE_LDFLAGS NOCF_PROTECTION_CFLAGS
+# Also add $NOSANTIZE_CFLAGS for S-records.
+global PLT_CFLAGS NOPIE_CFLAGS NOPIE_LDFLAGS NOCF_PROTECTION_CFLAGS NOSANTIZE_CFLAGS
 set old_CC "$CC"
-set CC "$CC $PLT_CFLAGS $NOPIE_CFLAGS $NOPIE_LDFLAGS $NOCF_PROTECTION_CFLAGS"
+set CC "$CC $PLT_CFLAGS $NOPIE_CFLAGS $NOPIE_LDFLAGS $NOCF_PROTECTION_CFLAGS $NOSANTIZE_CFLAGS"
 set old_CXX "$CXX"
-set CXX "$CXX $PLT_CFLAGS $NOPIE_CFLAGS $NOPIE_LDFLAGS $NOCF_PROTECTION_CFLAGS"
+set CXX "$CXX $PLT_CFLAGS $NOPIE_CFLAGS $NOPIE_LDFLAGS $NOCF_PROTECTION_CFLAGS $NOSANTIZE_CFLAGS"
 
 # S-records can't handle .note.gnu.property sections.
 if { [is_elf_format] \
diff --git a/ld/testsuite/ld-x86-64/plt-main-ibt-x32.dd b/ld/testsuite/ld-x86-64/plt-main-ibt-x32.dd
index 7b5e174..ab5e00d 100644
--- a/ld/testsuite/ld-x86-64/plt-main-ibt-x32.dd
+++ b/ld/testsuite/ld-x86-64/plt-main-ibt-x32.dd
@@ -3,5 +3,5 @@ Disassembly of section .plt.got:
 
 [a-f0-9]+ <[_a-z]+@plt>:
 [ 	]*[a-f0-9]+:	f3 0f 1e fa          	endbr64 
-[ 	]*[a-f0-9]+:	ff 25 .. .. 20 00    	jmpq +\*0x20....\(%rip\)        # ...... <[_a-z]+>
+[ 	]*[a-f0-9]+:	ff 25 .. .. 20 00    	jmpq +\*0x20....\(%rip\)        # ...... <.*>
 #pass
diff --git a/ld/testsuite/ld-x86-64/plt-main-ibt.dd b/ld/testsuite/ld-x86-64/plt-main-ibt.dd
index 725f427..e2d6750 100644
--- a/ld/testsuite/ld-x86-64/plt-main-ibt.dd
+++ b/ld/testsuite/ld-x86-64/plt-main-ibt.dd
@@ -3,5 +3,5 @@ Disassembly of section .plt.got:
 
 [a-f0-9]+ <[_a-z]+@plt>:
 [ 	]*[a-f0-9]+:	f3 0f 1e fa          	endbr64 
-[ 	]*[a-f0-9]+:	f2 ff 25 .. .. 20 00 	bnd jmpq \*0x20....\(%rip\)        # ...... <[_a-z]+>
+[ 	]*[a-f0-9]+:	f2 ff 25 .. .. 20 00 	bnd jmpq \*0x20....\(%rip\)        # ...... <.*>
 #pass
diff --git a/ld/testsuite/ld-x86-64/x86-64.exp b/ld/testsuite/ld-x86-64/x86-64.exp
index 8bfb4f7..cc2c6cc 100644
--- a/ld/testsuite/ld-x86-64/x86-64.exp
+++ b/ld/testsuite/ld-x86-64/x86-64.exp
@@ -748,13 +748,17 @@ global PLT_CFLAGS
 global NOPIE_CFLAGS NOPIE_LDFLAGS
 # Add $NOCF_PROTECTION_CFLAGS if -fcf-protection=none is required.
 global NOCF_PROTECTION_CFLAGS
+global NOSANTIZE_CFLAGS
 
 # Must be native with the C compiler
 if { [isnative] && [check_compiler_available] } {
-    run_cc_link_tests {
-	{"Helper X32 DSO from x86-64 object" "" "-m64 -fPIC -g"
-	 {simple.c} {} "libsimple.a"}
-    }
+    run_cc_link_tests [list \
+	[list \
+	    "Helper X32 DSO from x86-64 object" "" \
+	    "-m64 $NOSANTIZE_CFLAGS -fPIC -g" \
+	    {simple.c} {} "libsimple.a" \
+	] \
+    ]
 
     set convertx32 "$objcopy -O elf32-x86-64 tmpdir/simple.o tmpdir/simple-x32.o"
     send_log "$convertx32\n"
@@ -765,12 +769,16 @@ if { [isnative] && [check_compiler_available] } {
 	return
     }
 
-    run_ld_link_tests {
-	{"X32 DSO from x86-64 object"
-	 "-shared -melf32_x86_64 tmpdir/simple-x32.o" ""
-	 "--x32 -mx86-used-note=yes"
-	{dummy.s} {{readelf {-s --wide} x86-64-x32.rd}} "x86-64-x32"}
-    }
+    run_ld_link_tests [list \
+	[list \
+	    "X32 DSO from x86-64 object" \
+	    "-shared -melf32_x86_64 tmpdir/simple-x32.o" \
+	    "$NOSANTIZE_CFLAGS" \
+	    "--x32 -mx86-used-note=yes" \
+	    {dummy.s} {{readelf {-s --wide} x86-64-x32.rd}} \
+	    "x86-64-x32" \
+	] \
+    ]
 
     run_cc_link_tests [list \
 	[list \