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[PATCH] [MIPS] Use lwpid from lwp_info instead of inferior_ptid
- From: Yao Qi <qiyaoltc at gmail dot com>
- To: gdb-patches at sourceware dot org
- Cc: raajeshdasari at gmail dot com, macro at imgtec dot com
- Date: Thu, 27 Apr 2017 15:23:22 +0100
- Subject: [PATCH] [MIPS] Use lwpid from lwp_info instead of inferior_ptid
- Authentication-results: sourceware.org; auth=none
- References: <CAPXMrf_jyxS1muQ9gUUyiHyEkNUL9-aTw_CjUh7jOCbCKby9TQ@mail.gmail.com>
RAJESH reported that GDB gets "Couldn't write debug register: No such
process." on mips64 when GDB attaches to a multi threaded application.
Looks GDB nows PTRACE_GET_WATCH_REGS for inferior_ptid but
PTRACE_SET_WATCH_REGS for lwp->ptid, they may be different.
gdb:
2017-04-27 Yao Qi <yao.qi@linaro.org>
* mips-linux-nat.c (mips_linux_new_thread): Get lwpid from
lwp_info instead of getting from inferior_ptid.
---
gdb/mips-linux-nat.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/gdb/mips-linux-nat.c b/gdb/mips-linux-nat.c
index 9596b49..c5c18fd 100644
--- a/gdb/mips-linux-nat.c
+++ b/gdb/mips-linux-nat.c
@@ -624,14 +624,13 @@ write_watchpoint_regs (void)
static void
mips_linux_new_thread (struct lwp_info *lp)
{
- int tid;
+ long tid = ptid_get_lwp (lp->ptid);
- if (!mips_linux_read_watch_registers (ptid_get_lwp (inferior_ptid),
+ if (!mips_linux_read_watch_registers (tid,
&watch_readback,
&watch_readback_valid, 0))
return;
- tid = ptid_get_lwp (lp->ptid);
if (ptrace (PTRACE_SET_WATCH_REGS, tid, &watch_mirror, NULL) == -1)
perror_with_name (_("Couldn't write debug register"));
}
--
1.9.1