From e8ef12b99666ef6f84f4c7601dc76ae351e453f2 Mon Sep 17 00:00:00 2001 From: Pedro Alves Date: Fri, 18 Sep 2020 13:40:18 +0100 Subject: Fix "thread find" with multiple inferiors/targets (PR gdb/26631) "thread find" with multiple inferiors got broken with the multi-target work: Thread 1 "gdb" hit Breakpoint 1, internal_error (...) at ../../src/gdbsupport/errors.cc:51 51 { (top-gdb) bt #0 internal_error (file=0xffffd4d0 , line=0, fmt=0x555556330320 "en_US.UTF-8") at ../../src/gdbsupport/errors.cc:51 #1 0x0000555555bca4c7 in target_thread_name (info=0x555556801290) at ../../src/gdb/target.c:2035 #2 0x0000555555beb07a in thread_find_command (arg=0x7fffffffe08e "1", from_tty=0) at ../../src/gdb/thread.c:1959 #3 0x000055555572ec49 in do_const_cfunc (c=0x555556786bc0, args=0x7fffffffe08e "1", from_tty=0) at ../../src/gdb/cli/cli-decode.c:95 #4 0x0000555555732abd in cmd_func (cmd=0x555556786bc0, args=0x7fffffffe08e "1", from_tty=0) at ../../src/gdb/cli/cli-decode.c:2181 #5 0x0000555555bf1245 in execute_command (p=0x7fffffffe08e "1", from_tty=0) at ../../src/gdb/top.c:664 #6 0x00005555559cad10 in catch_command_errors (command=0x555555bf0c31 , arg=0x7fffffffe082 "thread find 1", from_tty=0) at ../../src/gdb/main.c:457 #7 0x00005555559cc33d in captured_main_1 (context=0x7fffffffdb60) at ../../src/gdb/main.c:1218 #8 0x00005555559cc571 in captured_main (data=0x7fffffffdb60) at ../../src/gdb/main.c:1243 #9 0x00005555559cc5e8 in gdb_main (args=0x7fffffffdb60) at ../../src/gdb/main.c:1268 #10 0x0000555555623816 in main (argc=17, argv=0x7fffffffdc78) at ../../src/gdb/gdb.c:32 The problem is that we're not switching to the inferior/target before calling target methods, which trips on an assertion put in place exactly to catch this sort of problem. gdb/testsuite/ChangeLog: PR gdb/26631 * gdb.multi/multi-target-thread-find.exp: New file. gdb/ChangeLog: PR gdb/26631 * thread.c (thread_find_command): Switch inferior before calling target methods. --- gdb/thread.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'gdb/thread.c') diff --git a/gdb/thread.c b/gdb/thread.c index c915407..0217f3b 100644 --- a/gdb/thread.c +++ b/gdb/thread.c @@ -1946,9 +1946,15 @@ thread_find_command (const char *arg, int from_tty) if (tmp != 0) error (_("Invalid regexp (%s): %s"), tmp, arg); + /* We're going to be switching threads. */ + scoped_restore_current_thread restore_thread; + update_thread_list (); + for (thread_info *tp : all_threads ()) { + switch_to_inferior_no_thread (tp->inf); + if (tp->name != NULL && re_exec (tp->name)) { printf_filtered (_("Thread %s has name '%s'\n"), -- cgit v1.1