[gdb/symtab] Support -readnow during reread

When running test-case gdb.base/cached-source-file.exp with target board
readnow, we run into:
...
FAIL: gdb.base/cached-source-file.exp: rerun program (the program exited)
...

The problem is that when rereading, the readnow is ignored.

Fix this by copying the readnow handling code from symbol_file_add_with_addrs
to reread_symbols.

Tested on x86_64-linux.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=26800

3 files changed, 11 insertions, 23 deletions

diff --git a/gdb/testsuite/gdb.ada/exec_changed.exp b/gdb/testsuite/gdb.ada/exec_changed.exp
index 8cbc29f..d08e1ce 100644
--- a/gdb/testsuite/gdb.ada/exec_changed.exp
+++ b/gdb/testsuite/gdb.ada/exec_changed.exp
@@ -51,8 +51,6 @@ gdb_reinitialize_dir $srcdir/$subdir
 gdb_test "shell mv ${binfile} ${common_binfile}" ".*" ""
 gdb_load ${common_binfile}
 
-set readnow_p [readnow ${common_binfile}]
-
 # Start the program, we should land in the program main procedure
 if { [gdb_start_cmd] < 0 } {
     untested start
@@ -78,9 +76,6 @@ gdb_test "shell touch ${common_binfile}" ".*" ""
 if { [gdb_start_cmd] < 0 } {
     fail "start second"
 } else {
-    if { $readnow_p } {
-	setup_kfail "gdb/26800" *-*-*
-    }
     gdb_test "" \
              "second \\(\\) at .*second.adb.*" \
              "start second"
@@ -108,9 +103,6 @@ if { [gdb_start_cmd] < 0 } {
     gdb_test_no_output "set \$check_gdb_running = 0" "check gdb running"
     fail "start just first"
 } else {
-    if { $readnow_p } {
-	setup_kfail "gdb/26800" *-*-*
-    }
     gdb_test "" \
 	"first \\(\\) at .*first.adb.*" \
 	"start just first"
diff --git a/gdb/testsuite/gdb.base/cached-source-file.exp b/gdb/testsuite/gdb.base/cached-source-file.exp
index 13965d9..3b0166a 100644
--- a/gdb/testsuite/gdb.base/cached-source-file.exp
+++ b/gdb/testsuite/gdb.base/cached-source-file.exp
@@ -84,13 +84,17 @@ if { [gdb_compile "${srcfile}" "${binfile}" executable {debug}] != "" } {
 # Rerun the program.  This should not only force GDB to reload the
 # source cache, but also to break at BP_LINE again, which now has
 # different contents.
-gdb_test_multiple "run" "rerun program" {
-    -re {The program being debugged has been started already\.\r\nStart it from the beginning\? \(y or n\) $} {
-	set binregex [string_to_regexp $binfile]
-	gdb_test "y" "\\`$binregex\\' has changed; re-reading symbols\.\r\nStarting program: ${binregex}.*" \
-	    "rerun program"
-    }
-}
+set q \
+    [multi_line \
+	 "The program being debugged has been started already\\." \
+	 "Start it from the beginning\\? \\(y or n\\) "]
+set binregex [string_to_regexp $binfile]
+set re \
+    [multi_line \
+	 "\\`$binregex\\' has changed; re-reading symbols\\.(" \
+	 "Expanding full symbols from $binfile\\.\\.\\.)?" \
+	 "Starting program: ${binregex}.*"]
+gdb_test "run" $re "rerun program" $q y
 
 # Again, perform the listing and check that the line indeed has
 # changed for GDB.
diff --git a/gdb/testsuite/gdb.base/reread.exp b/gdb/testsuite/gdb.base/reread.exp
index 7ab30f2..3d4b484 100644
--- a/gdb/testsuite/gdb.base/reread.exp
+++ b/gdb/testsuite/gdb.base/reread.exp
@@ -60,8 +60,6 @@ foreach_with_prefix opts { "" "pie" } {
 	gdb_rename_execfile ${binfile1} ${binfile}
 	gdb_load ${binfile}
 
-	set readnow_p [readnow ${binfile}]
-	
 	# Set a breakpoint at foo
 
 	gdb_test "break foo" \
@@ -92,9 +90,6 @@ foreach_with_prefix opts { "" "pie" } {
 	    unsupported $test
 	} else {
 	    gdb_run_cmd
-	    if { $readnow_p } {
-		setup_kfail "gdb/26800" *-*-*
-	    }
 	    gdb_test "" "Breakpoint.* foo .* at .*:9.*" $test
 	}
 
@@ -131,9 +126,6 @@ foreach_with_prefix opts { "" "pie" } {
 	    gdb_rename_execfile ${binfile} ${binfile1}
 	    gdb_rename_execfile ${binfile2} ${binfile}
 	    gdb_run_cmd
-	    if { $readnow_p } {
-		setup_kfail "gdb/26800" *-*-*
-	    }
 	    gdb_test "" "Breakpoint.* foo .* at .*:9.*" \
 		"second pass: run to foo() second time"
 	}