From: Markus Metzger <markus.t.metzger@intel.com>
To: jan.kratochvil@redhat.com, palves@redhat.com
Cc: gdb-patches@sourceware.org
Subject: [PATCH v9 15/29] record-btrace: supply register target methods
Date: Thu, 19 Dec 2013 16:45:00 -0000 [thread overview]
Message-ID: <1387471499-29444-16-git-send-email-markus.t.metzger@intel.com> (raw)
In-Reply-To: <1387471499-29444-1-git-send-email-markus.t.metzger@intel.com>
Supply target methods to allow reading the PC. Forbid anything else.
2013-12-19 Markus Metzger <markus.t.metzger@intel.com>
* record-btrace.c (record_btrace_fetch_registers)
(record_btrace_store_registers)
(record_btrace_to_prepare_to_store): New.
(init_record_btrace_ops): Add the above.
---
gdb/record-btrace.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c
index fc692aa..26ae6d8 100644
--- a/gdb/record-btrace.c
+++ b/gdb/record-btrace.c
@@ -32,6 +32,7 @@
#include "ui-out.h"
#include "symtab.h"
#include "filenames.h"
+#include "regcache.h"
/* The target_ops of record-btrace. */
static struct target_ops record_btrace_ops;
@@ -751,6 +752,94 @@ record_btrace_is_replaying (void)
return 0;
}
+/* The to_fetch_registers method of target record-btrace. */
+
+static void
+record_btrace_fetch_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
+{
+ struct btrace_insn_iterator *replay;
+ struct thread_info *tp;
+
+ tp = find_thread_ptid (inferior_ptid);
+ gdb_assert (tp != NULL);
+
+ replay = tp->btrace.replay;
+ if (replay != NULL)
+ {
+ const struct btrace_insn *insn;
+ struct gdbarch *gdbarch;
+ int pcreg;
+
+ gdbarch = get_regcache_arch (regcache);
+ pcreg = gdbarch_pc_regnum (gdbarch);
+ if (pcreg < 0)
+ return;
+
+ /* We can only provide the PC register. */
+ if (regno >= 0 && regno != pcreg)
+ return;
+
+ insn = btrace_insn_get (replay);
+ gdb_assert (insn != NULL);
+
+ regcache_raw_supply (regcache, regno, &insn->pc);
+ }
+ else
+ {
+ struct target_ops *t;
+
+ for (t = ops->beneath; t != NULL; t = t->beneath)
+ if (t->to_fetch_registers != NULL)
+ {
+ t->to_fetch_registers (t, regcache, regno);
+ break;
+ }
+ }
+}
+
+/* The to_store_registers method of target record-btrace. */
+
+static void
+record_btrace_store_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
+{
+ struct target_ops *t;
+
+ if (record_btrace_is_replaying ())
+ error (_("This record target does not allow writing registers."));
+
+ gdb_assert (may_write_registers != 0);
+
+ for (t = ops->beneath; t != NULL; t = t->beneath)
+ if (t->to_store_registers != NULL)
+ {
+ t->to_store_registers (t, regcache, regno);
+ return;
+ }
+
+ noprocess ();
+}
+
+/* The to_prepare_to_store method of target record-btrace. */
+
+static void
+record_btrace_prepare_to_store (struct target_ops *ops,
+ struct regcache *regcache)
+{
+ struct target_ops *t;
+
+ if (record_btrace_is_replaying ())
+ return;
+
+ for (t = ops->beneath; t != NULL; t = t->beneath)
+ if (t->to_prepare_to_store != NULL)
+ {
+ t->to_prepare_to_store (t, regcache);
+ return;
+ }
+}
+
/* Initialize the record-btrace target ops. */
static void
@@ -778,6 +867,9 @@ init_record_btrace_ops (void)
ops->to_call_history_from = record_btrace_call_history_from;
ops->to_call_history_range = record_btrace_call_history_range;
ops->to_record_is_replaying = record_btrace_is_replaying;
+ ops->to_fetch_registers = record_btrace_fetch_registers;
+ ops->to_store_registers = record_btrace_store_registers;
+ ops->to_prepare_to_store = record_btrace_prepare_to_store;
ops->to_stratum = record_stratum;
ops->to_magic = OPS_MAGIC;
}
--
1.8.3.1
next prev parent reply other threads:[~2013-12-19 16:45 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-19 16:45 [PATCH v9 00/29] record-btrace: reverse Markus Metzger
2013-12-19 16:45 ` [PATCH v9 23/29] record-btrace: provide target_find_new_threads method Markus Metzger
2013-12-19 19:32 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 29/29] record-btrace: add (reverse-)stepping support Markus Metzger
2013-12-19 17:31 ` Eli Zaretskii
2013-12-19 20:10 ` Pedro Alves
2013-12-20 14:37 ` Metzger, Markus T
2013-12-20 14:47 ` Metzger, Markus T
2013-12-20 16:31 ` Pedro Alves
2013-12-20 16:07 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 13/29] btrace: add replay position to btrace thread info Markus Metzger
2013-12-19 16:45 ` [PATCH v9 24/29] record-btrace: add record goto target methods Markus Metzger
2013-12-19 16:45 ` [PATCH v9 10/29] btrace: increase buffer size Markus Metzger
2013-12-19 16:45 ` [PATCH v9 25/29] record-btrace: extend unwinder Markus Metzger
2013-12-19 16:45 ` [PATCH v9 22/29] record-btrace: add to_wait and to_resume target methods Markus Metzger
2013-12-19 16:45 ` [PATCH v9 03/29] btrace: uppercase btrace_read_type Markus Metzger
2013-12-19 16:45 ` [PATCH v9 28/29] target: allow decr_pc_after_break to be defined by the target Markus Metzger
2013-12-19 19:51 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 21/29] record-btrace: provide xfer_partial target method Markus Metzger
2013-12-19 19:13 ` Pedro Alves
2013-12-20 13:37 ` Metzger, Markus T
2013-12-20 13:54 ` Metzger, Markus T
2013-12-20 15:56 ` Pedro Alves
2013-12-20 16:02 ` Pedro Alves
2014-01-13 17:11 ` Pedro Alves
2014-01-13 12:36 ` Metzger, Markus T
2014-01-13 16:47 ` Pedro Alves
2013-12-19 19:26 ` Pedro Alves
2013-12-20 13:32 ` Metzger, Markus T
2013-12-20 15:36 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 04/29] gdbarch: add instruction predicate methods Markus Metzger
2013-12-19 20:19 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 09/29] record-btrace: start counting at one Markus Metzger
2013-12-19 17:27 ` Eli Zaretskii
2013-12-19 16:45 ` [PATCH v9 11/29] record-btrace: optionally indent function call history Markus Metzger
2013-12-19 18:23 ` Pedro Alves
2013-12-20 12:54 ` Metzger, Markus T
2013-12-20 16:47 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 12/29] record-btrace: make ranges include begin and end Markus Metzger
2013-12-19 17:29 ` Eli Zaretskii
2013-12-19 16:45 ` [PATCH v9 16/29] frame, backtrace: allow targets to supply a frame unwinder Markus Metzger
2013-12-19 18:41 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 08/29] record-btrace: fix insn range in function call history Markus Metzger
2013-12-19 16:45 ` [PATCH v9 05/29] frame: add frame_is_tailcall function Markus Metzger
2013-12-19 20:19 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 18/29] frame: do not assume unwinding will succeed Markus Metzger
2013-12-19 16:45 ` [PATCH v9 01/29] btrace, test: fix multi-line btrace tests Markus Metzger
2013-12-19 18:01 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 27/29] record-btrace: show trace from enable location Markus Metzger
2013-12-19 16:45 ` [PATCH v9 17/29] frame, cfa: check unwind stop reason first Markus Metzger
2013-12-19 16:45 ` [PATCH v9 19/29] record-btrace, frame: supply target-specific unwinder Markus Metzger
2013-12-19 16:45 ` [PATCH v9 06/29] frame: add frame_id_build_unavailable_stack_special Markus Metzger
2013-12-19 18:12 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 02/29] btrace, linux: fix memory leak when reading branch trace Markus Metzger
2013-12-19 16:45 ` [PATCH v9 14/29] target: add ops parameter to to_prepare_to_store method Markus Metzger
2013-12-19 18:30 ` Pedro Alves
2013-12-19 21:13 ` Tom Tromey
2013-12-20 13:07 ` Metzger, Markus T
2013-12-20 15:13 ` Tom Tromey
2013-12-20 17:23 ` Pedro Alves
2013-12-19 16:45 ` [PATCH v9 07/29] btrace: change branch trace data structure Markus Metzger
2013-12-19 16:45 ` [PATCH v9 20/29] target, breakpoint: allow insert/remove breakpoint to be forwarded Markus Metzger
2013-12-19 19:08 ` Pedro Alves
2013-12-19 16:45 ` Markus Metzger [this message]
2013-12-19 16:45 ` [PATCH v9 26/29] btrace, gdbserver: read branch trace incrementally Markus Metzger
2013-12-19 20:23 ` [PATCH v9 00/29] record-btrace: reverse Pedro Alves
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