asan ld builds without detect_leaks=0

I found that building binutils with -fsanitize=address,undefined
results in much of the testsuite not being run.  The problem is that
running gcc results in linker plugin memory leaks which of course are
errors, so the testsuite sees this as lack of compiler support.

	* testsuite/lib/ld-lib.exp (run_host_noleak): New proc.
	(check_compiler_available, check_lto_available),
	(check_lto_fat_available, check_lto_shared_available),
	(check_ifunc_available, check_ifunc_attribute_available),
	(check_libdl_available, check_gnu2_tls_available),
	(compile_one_cc): Use run_host_noleak.
	* testsuite/config/default.exp (compiler_supports): Likewise.

2 files changed, 28 insertions, 12 deletions

diff --git a/ld/testsuite/config/default.exp b/ld/testsuite/config/default.exp
index f93fb30..66721ff 100644
--- a/ld/testsuite/config/default.exp
+++ b/ld/testsuite/config/default.exp
@@ -422,7 +422,7 @@ proc compiler_supports { flag args } {
 	}
 	close $f
 	set rfn [remote_download host $fn]
-	set avail [run_host_cmd_yesno "$CC_FOR_TARGET" "$flags $flag $rfn -o $rfno"]
+	set avail [run_host_noleak "$CC_FOR_TARGET" "$flags $flag $rfn -o $rfno"]
 	remote_file host delete $rfno
 	remote_file host delete $rfn
 	file delete $fn
diff --git a/ld/testsuite/lib/ld-lib.exp b/ld/testsuite/lib/ld-lib.exp
index 74125ac..9615271 100644
--- a/ld/testsuite/lib/ld-lib.exp
+++ b/ld/testsuite/lib/ld-lib.exp
@@ -151,6 +151,22 @@ proc run_host_cmd_yesno { prog command } {
     return 0;
 }
 
+proc run_host_noleak { prog command } {
+    global env
+    if [info exists env(ASAN_OPTIONS)] {
+	set old_asan "$env(ASAN_OPTIONS)"
+    }
+    # don't fail the test due to gcc plugin or ld memory leaks
+    set env(ASAN_OPTIONS) "detect_leaks=0"
+    set result [run_host_cmd_yesno "$prog" "$command"]
+    if [info exists old_asan] {
+	set env(ASAN_OPTIONS) "$old_asan"
+    } else {
+	unset env(ASAN_OPTIONS)
+    }
+    return $result
+}
+
 # Link an object using relocation.
 #
 proc default_ld_relocate { ld target objects } {
@@ -1248,7 +1264,7 @@ proc check_compiler_available { } {
 	if [is_remote host] {
 	    set src [remote_download host $src]
 	}
-	set compiler_available_saved [run_host_cmd_yesno "$CC_FOR_TARGET" "$flags $src -o $output"]
+	set compiler_available_saved [run_host_noleak "$CC_FOR_TARGET" "$flags $src -o $output"]
 	remote_file host delete $src
 	remote_file host delete $output
 	file delete $src
@@ -1311,7 +1327,7 @@ proc check_lto_available { } {
 	if [is_remote host] {
 	    set src [remote_download host $src]
 	}
-	set lto_available_saved [run_host_cmd_yesno "$CC_FOR_TARGET" "$flags -flto -fuse-linker-plugin $src -o $output"]
+	set lto_available_saved [run_host_noleak "$CC_FOR_TARGET" "$flags -flto -fuse-linker-plugin $src -o $output"]
 	remote_file host delete $src
 	remote_file host delete $output
 	file delete $src
@@ -1347,7 +1363,7 @@ proc check_lto_fat_available { } {
 	if [is_remote host] {
 	    set src [remote_download host $src]
 	}
-	set lto_fat_available_saved [run_host_cmd_yesno "$CC_FOR_TARGET" "$flags -flto -ffat-lto-objects -fuse-linker-plugin $src -o $output"]
+	set lto_fat_available_saved [run_host_noleak "$CC_FOR_TARGET" "$flags -flto -ffat-lto-objects -fuse-linker-plugin $src -o $output"]
 	remote_file host delete $src
 	remote_file host delete $output
 	file delete $src
@@ -1383,7 +1399,7 @@ proc check_lto_shared_available { } {
 	if [is_remote host] {
 	    set src [remote_download host $src]
 	}
-	set lto_shared_available_saved [run_host_cmd_yesno "$CC_FOR_TARGET" "$flags -shared -fPIC -flto -fuse-linker-plugin $src -o $output"]
+	set lto_shared_available_saved [run_host_noleak "$CC_FOR_TARGET" "$flags -shared -fPIC -flto -fuse-linker-plugin $src -o $output"]
 	remote_file host delete $src
 	remote_file host delete $output
 	file delete $src
@@ -1444,7 +1460,7 @@ proc check_ifunc_available { } {
 	if [is_remote host] {
 	    set src [remote_download host $src]
 	}
-	set ifunc_available_saved [run_host_cmd_yesno "$CC_FOR_TARGET" "$flags $src -o $output"]
+	set ifunc_available_saved [run_host_noleak "$CC_FOR_TARGET" "$flags $src -o $output"]
 	if { [isnative] && $ifunc_available_saved == 1 } {
 	  set ifunc_available_saved [run_host_cmd_yesno "$output" ""]
 	}
@@ -1484,7 +1500,7 @@ proc check_ifunc_attribute_available { } {
 	if [is_remote host] {
 	    set src [remote_download host $src]
 	}
-	set ifunc_attribute_available_saved [run_host_cmd_yesno "$CC_FOR_TARGET" "$flags $src -o $output"]
+	set ifunc_attribute_available_saved [run_host_noleak "$CC_FOR_TARGET" "$flags $src -o $output"]
 	if { [isnative] && $ifunc_attribute_available_saved == 1 } {
 	  set ifunc_attribute_available_saved [run_host_cmd_yesno "$output" ""]
 	}
@@ -1522,7 +1538,7 @@ proc check_libdl_available { } {
 	if [is_remote host] {
 	    set src [remote_download host $src]
 	}
-	set libdl_available_saved [run_host_cmd_yesno "$CC_FOR_TARGET" "$src -o $output -ldl"]
+	set libdl_available_saved [run_host_noleak "$CC_FOR_TARGET" "$src -o $output -ldl"]
 	remote_file host delete $src
 	remote_file host delete $output
 	file delete $src
@@ -1571,11 +1587,11 @@ proc check_gnu2_tls_available { } {
 	if [is_remote host] {
 	    set src2 [remote_download host $src2]
 	}
-	set gnu2_tls_available_saved [run_host_cmd_yesno "$CC_FOR_TARGET" "-fPIC -shared $flags $src1 -o $output1"]
+	set gnu2_tls_available_saved [run_host_noleak "$CC_FOR_TARGET" "-fPIC -shared $flags $src1 -o $output1"]
 	if { $gnu2_tls_available_saved == 1 } {
-	    set gnu2_tls_available_saved [run_host_cmd_yesno "$CC_FOR_TARGET" "$flags $src2 $output1 -o $output2"]
+	    set gnu2_tls_available_saved [run_host_noleak "$CC_FOR_TARGET" "$flags $src2 $output1 -o $output2"]
 	    if { $gnu2_tls_available_saved == 1 } {
-		set gnu2_tls_available_saved [run_host_cmd_yesno "$output2" ""]
+		set gnu2_tls_available_saved [run_host_noleak "$output2" ""]
 	    }
 	}
 	remote_file host delete $src1
@@ -1597,7 +1613,7 @@ proc compile_one_cc { src output additional_flags } {
     if [is_remote host] {
 	set src [remote_download host $src]
     }
-    return [run_host_cmd_yesno "$CC_FOR_TARGET" "$flags $CFLAGS_FOR_TARGET $additional_flags $src -o $output"]
+    return [run_host_noleak "$CC_FOR_TARGET" "$flags $CFLAGS_FOR_TARGET $additional_flags $src -o $output"]
 }
 
 # Returns true if the target compiler supports -gctf.