[binutils-gdb] [gdb/testsuite] Fix py-autoloaded-pretty-printers-in-newobjfile-event.exp for remote target

[Tom de Vries]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=ddc003b7ded07645cec7d14284ea317b29c8c336

commit ddc003b7ded07645cec7d14284ea317b29c8c336
Author: Tom de Vries <tdevries@suse.de>
Date:   Fri Mar 10 16:34:04 2023 +0100

    [gdb/testsuite] Fix py-autoloaded-pretty-printers-in-newobjfile-event.exp for remote target
    
    With test-case gdb.python/py-autoloaded-pretty-printers-in-newobjfile-event.exp
    and target board remote-gdbserver-on-localhost, I run into:
    ...
    FAIL: $exp: runto: run to main
    ...
    
    I can easily fix this using "gdb_load_shlib $binfile_lib", but then run into:
    ...
    (gdb) print all_good^M
    $1 = false^M
    (gdb) FAIL: $exp: print all_good
    info pretty-printer^M
    ...
    
    Sysroot is set to "target:", so gdb downloads the shared library from the target
    (Using $so as shorthand for
    libpy-autoloaded-pretty-printers-in-newobjfile-event.so):
    ...
    Reading /home/remote-target/$so from remote target...^M
    ...
    and internally refers to it as "target:/home/remote-target/$so".
    
    In load_auto_scripts_for_objfile, gdb gives up trying to auto-load scripts
    for $so once it checks for is_target_filename.
    
    Fix this by declaring auto-load unsupported if sysroot starts with "target:".
    
    Tested on x86_64-linux.

Diff:
---
 ...y-autoloaded-pretty-printers-in-newobjfile-event.exp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/gdb/testsuite/gdb.python/py-autoloaded-pretty-printers-in-newobjfile-event.exp b/gdb/testsuite/gdb.python/py-autoloaded-pretty-printers-in-newobjfile-event.exp
index eefa99c8fa1..3f6d8199c46 100644
--- a/gdb/testsuite/gdb.python/py-autoloaded-pretty-printers-in-newobjfile-event.exp
+++ b/gdb/testsuite/gdb.python/py-autoloaded-pretty-printers-in-newobjfile-event.exp
@@ -60,11 +60,28 @@ set remote_python_event_handler_file\
 gdb_test_no_output "source ${remote_python_event_handler_file}" "load python file"
 
 gdb_load ${binfile}
+gdb_load_shlib $binfile_lib
 
 if { ![runto_main] } {
     return
 }
 
+if { [is_remote target ] } {
+    set target_sysroot 0
+    gdb_test_multiple  "show sysroot" "" {
+	-re -wrap "\r\nThe current system root is \"target:.*\"\\." {
+	    set target_sysroot 1
+	}
+	-re -wrap "" {
+	}
+    }
+
+    if { $target_sysroot } {
+	unsupported "sysroot start with target: -- auto-load not supported"
+	return
+    }
+}
+
 # Check that the new_objfile handler saw the pretty-printer.
 gdb_test "print all_good" " = true"