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authorJan Kratochvil <jan.kratochvil@redhat.com>2012-01-24 13:46:55 +0000
committerJan Kratochvil <jan.kratochvil@redhat.com>2012-01-24 13:46:55 +0000
commit4403d8e9b35649c5b24f65c0ec0decc3839e1164 (patch)
tree05ba9cdf77784672a115e5576715b31fc7df7873 /gdb/i386-linux-nat.c
parent2992c9a7112fd3b97cd693b743639e01baea3003 (diff)
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Fix watchpoints across inferior fork. * amd64-linux-nat.c (update_debug_registers_callback): Update the comment for linux_nat_iterate_watchpoint_lwps. (amd64_linux_dr_set_control, amd64_linux_dr_set_addr): Use linux_nat_iterate_watchpoint_lwps. (amd64_linux_prepare_to_resume): New comment on Linux kernel. * i386-linux-nat.c (update_debug_registers_callback): Update the comment for linux_nat_iterate_watchpoint_lwps. (i386_linux_dr_set_control, i386_linux_dr_set_addr): Use linux_nat_iterate_watchpoint_lwps. (i386_linux_prepare_to_resume): New comment on Linux kernel. * i386-nat.c: Include inferior.h. (dr_mirror): Remove. (i386_inferior_data, struct i386_inferior_data) (i386_inferior_data_get): New. (i386_debug_reg_state): Use i386_inferior_data_get. (i386_cleanup_dregs, i386_update_inferior_debug_regs) (i386_insert_watchpoint, i386_remove_watchpoint) (i386_stopped_data_address, i386_insert_hw_breakpoint) (i386_remove_hw_breakpoint): New variable state, use i386_debug_reg_state instead of DR_MIRROR. * linux-nat.c (delete_lwp): New declaration. (num_lwps): Move here from downwards. (delete_lwp_cleanup): New. (linux_child_follow_fork): Create new child_lp, call linux_nat_new_thread and linux_nat_prepare_to_resume before calling PTRACE_DETACH. (num_lwps): Move upwards. (linux_nat_iterate_watchpoint_lwps): New. * linux-nat.h (linux_nat_iterate_watchpoint_lwps_ftype): New. (linux_nat_iterate_watchpoint_lwps_ftype): New declaration. gdb/testsuite/ Fix watchpoints across inferior fork. * gdb.threads/watchpoint-fork-child.c: New file. * gdb.threads/watchpoint-fork-mt.c: New file. * gdb.threads/watchpoint-fork-parent.c: New file. * gdb.threads/watchpoint-fork-st.c: New file. * gdb.threads/watchpoint-fork.exp: New file. * gdb.threads/watchpoint-fork.h: New file.
Diffstat (limited to 'gdb/i386-linux-nat.c')
-rw-r--r--gdb/i386-linux-nat.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/gdb/i386-linux-nat.c b/gdb/i386-linux-nat.c
index 4b1b20f..38e7027 100644
--- a/gdb/i386-linux-nat.c
+++ b/gdb/i386-linux-nat.c
@@ -708,8 +708,8 @@ i386_linux_dr_get_status (void)
return i386_linux_dr_get (inferior_ptid, DR_STATUS);
}
-/* Callback for iterate_over_lwps. Update the debug registers of
- LWP. */
+/* Callback for linux_nat_iterate_watchpoint_lwps. Update the debug registers
+ of LWP. */
static int
update_debug_registers_callback (struct lwp_info *lwp, void *arg)
@@ -735,9 +735,7 @@ update_debug_registers_callback (struct lwp_info *lwp, void *arg)
static void
i386_linux_dr_set_control (unsigned long control)
{
- ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
-
- iterate_over_lwps (pid_ptid, update_debug_registers_callback, NULL);
+ linux_nat_iterate_watchpoint_lwps (update_debug_registers_callback, NULL);
}
/* Set address REGNUM (zero based) to ADDR in all LWPs of the current
@@ -750,7 +748,7 @@ i386_linux_dr_set_addr (int regnum, CORE_ADDR addr)
gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
- iterate_over_lwps (pid_ptid, update_debug_registers_callback, NULL);
+ linux_nat_iterate_watchpoint_lwps (update_debug_registers_callback, NULL);
}
/* Called when resuming a thread.
@@ -772,6 +770,9 @@ i386_linux_prepare_to_resume (struct lwp_info *lwp)
struct i386_debug_reg_state *state = i386_debug_reg_state ();
int i;
+ /* See amd64_linux_prepare_to_resume for Linux kernel note on
+ i386_linux_dr_set calls ordering. */
+
for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
if (state->dr_ref_count[i] > 0)
{