gdb/debuginfod: Whitespace-only URL should disable debuginfod

Currently debuginfod is disabled when the string of server URLs
is unset or set to be the empty string (via the $DEBUGINFOD_URLS
environment variable or the 'set debuginfod urls' gdb command).

Extend this functionality so that a whitespace-only URL also disables
debuginfod.

Modify a testcase to verify that a whitespace-only URL disables
debuginfod.

diff --git a/gdb/debuginfod-support.c b/gdb/debuginfod-support.c
index 4ce2e786b6a1b75890b16f5155658ab8ee66e894..dffcd782e7df7d43d2b98b74eaddce7ce7be947e 100644 (file)
--- a/gdb/debuginfod-support.c
+++ b/gdb/debuginfod-support.c
@@ -173,10 +173,11 @@ get_debuginfod_client ()
 static bool
 debuginfod_is_enabled ()
 {
-  const char *urls = getenv (DEBUGINFOD_URLS_ENV_VAR);
+  const char *urls = skip_spaces (getenv (DEBUGINFOD_URLS_ENV_VAR));
 
-  if (urls == nullptr || urls[0] == '\0'
-      || debuginfod_enabled == debuginfod_off)
+  if (debuginfod_enabled == debuginfod_off
+      || urls == nullptr
+      || *urls == '\0')
     return false;
 
   if (debuginfod_enabled == debuginfod_ask)

diff --git a/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp b/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
index bd90bcd0cfe4aef5a81b9e6c2689fce77e69d161..74d026464b92ae0cd1c483bd0be2c948254b1567 100644 (file)
--- a/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
+++ b/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
@@ -309,7 +309,8 @@ proc local_url { } {
     clean_restart
     # Disable confirmation to avoid having to deal with a query.  See
     # test_urls.
-    gdb_test_multiple "with confirm off -- file $binfile" "notice empty URL" {
+    set file_cmd "with confirm off -- file $binfile"
+    gdb_test_multiple $file_cmd "notice empty URL" {
        -re -wrap "This GDB supports auto-downloading.*" {
            fail $gdb_test_name
        }
@@ -318,9 +319,17 @@ proc local_url { } {
        }
     }
 
-    test_urls "   " \
-        "" \
-        "notice whitespace URL"
+    # Whitespace-only URLS disables Debuginfod.
+    setenv DEBUGINFOD_URLS "    "
+    clean_restart
+    gdb_test_multiple $file_cmd "notice whitespace URL" {
+       -re -wrap "This GDB supports auto-downloading.*" {
+           fail $gdb_test_name
+       }
+       -re -wrap "" {
+           pass $gdb_test_name
+       }
+    }
 
     set url "http://127.0.0.1:$port"