[RFC] Change the_dummy_target to be a global
Tom Tromey
tromey@adacore.com
Mon Mar 4 20:41:00 GMT 2019
While debugging gdb, I printed the target stack and got:
(top-gdb) p g_target_stack
$10 = {
m_top = thread_stratum,
m_stack = {0x142b0b0, 0x13da600 <exec_ops>, 0x1c70690, 0x13d63b0 <ravenscar_ops>, 0x0, 0x0, 0x0}
}
(This is clearly from before the change to make ravenscar
multi-target-capable.)
Here, 0x142b0b0 is the singleton dummy target. It seems to me that
since this is always a singleton, it would be a bit nicer if it were a
global, so that it would be noted in the above.
This patch implements this idea, and now I get:
(top-gdb) p g_target_stack
$2 = {
m_top = dummy_stratum,
m_stack = {0x1f1b040 <the_dummy_target>, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}
}
I did not do the same for the debug target. It didn't seem as useful
to me.
gdb/ChangeLog
2019-03-04 Tom Tromey <tromey@adacore.com>
* target.c (the_dummy_target): Move later. Change type to
"dummy_target".
(initialize_targets): Don't initialize the_dummy_target.
---
gdb/ChangeLog | 6 ++++++
gdb/target.c | 11 ++++++-----
2 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/gdb/target.c b/gdb/target.c
index d5ff932c748..5c0375a59a3 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -106,10 +106,8 @@ static enum exec_direction_kind default_execution_direction
static std::unordered_map<const target_info *, target_open_ftype *>
target_factories;
-/* The initial current target, so that there is always a semi-valid
- current target. */
+/* The singleton debug target. */
-static struct target_ops *the_dummy_target;
static struct target_ops *the_debug_target;
/* The target stack. */
@@ -3240,6 +3238,10 @@ dummy_make_corefile_notes (struct target_ops *self,
#include "target-delegates.c"
+/* The initial current target, so that there is always a semi-valid
+ current target. */
+
+static dummy_target the_dummy_target;
static const target_info dummy_target_info = {
"None",
@@ -3977,8 +3979,7 @@ set_write_memory_permission (const char *args, int from_tty,
void
initialize_targets (void)
{
- the_dummy_target = new dummy_target ();
- push_target (the_dummy_target);
+ push_target (&the_dummy_target);
the_debug_target = new debug_target ();
--
2.20.1
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