Re: [PATCH 04/13] Get pid rather than lwpid

Yao Qi
2015-08-25T13:12:05Z

Pedro Alves <palves@redhat.com> writes:

> This doesn't really make sense to me. We're changing debug registers
> of an LWP, so we should print the LWP's pid, not the thread group
> leader's pid.

Since the local variable is named 'pid' and the string literal in the
debugging output is 'pid' too, I thought pid should be printed. This
patch renames the variable and prints lwpid rather than pid.

--
Yao (齐尧)
From f0dc39d1a71f6c05c1f09fe8c83e01e3187beec9 Mon Sep 17 00:00:00 2001
From: Yao Qi <yao.qi@linaro.org>
Date: Tue, 25 Aug 2015 14:08:45 +0100
Subject: [PATCH] Print tid in debug output of debug_reg_change_callback

In debug_reg_change_callback, we change debug registers of each LWP.
It makes more sense to print LWP's pid rather than group leader's pid.

gdb:

2015-08-25 Yao Qi <yao.qi@linaro.org>

* nat/aarch64-linux-hw-point.c (debug_reg_change_callback):
Rename local variable pid to tid, and get lwpid of lwp. Update
debug output.

diff --git a/gdb/nat/aarch64-linux-hw-point.c b/gdb/nat/aarch64-linux-hw-point.c
index e4a2f8e..c3fe7dd 100644
--- a/gdb/nat/aarch64-linux-hw-point.c
+++ b/gdb/nat/aarch64-linux-hw-point.c
@@ -248,7 +248,7 @@ debug_reg_change_callback (struct lwp_info *lwp, void *ptr)
{
struct aarch64_dr_update_callback_param *param_p
= (struct aarch64_dr_update_callback_param *) ptr;
- int pid = ptid_get_pid (ptid_of_lwp (lwp));
+ int tid = ptid_get_lwp (ptid_of_lwp (lwp));
int idx = param_p->idx;
int is_watchpoint = param_p->is_watchpoint;
struct arch_lwp_info *info = lwp_arch_private_info (lwp);
@@ -264,8 +264,8 @@ debug_reg_change_callback (struct lwp_info *lwp, void *ptr)
if (show_debug_regs)
{
debug_printf ("debug_reg_change_callback: \n\tOn entry:\n");
- debug_printf ("\tpid%d, dr_changed_bp=0x%s, "
- "dr_changed_wp=0x%s\n", pid,
+ debug_printf ("\ttid%d, dr_changed_bp=0x%s, "
+ "dr_changed_wp=0x%s\n", tid,
phex (info->dr_changed_bp, 8),
phex (info->dr_changed_wp, 8));
}
@@ -290,8 +290,8 @@ debug_reg_change_callback (struct lwp_info *lwp, void *ptr)

if (show_debug_regs)
{
- debug_printf ("\tOn exit:\n\tpid%d, dr_changed_bp=0x%s, "
- "dr_changed_wp=0x%s\n", pid,
+ debug_printf ("\tOn exit:\n\ttid%d, dr_changed_bp=0x%s, "
+ "dr_changed_wp=0x%s\n", tid,
phex (info->dr_changed_bp, 8),
phex (info->dr_changed_wp, 8));
}