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[PATCH 09/16] btrace, linux: add linux native btrace target ops
- From: markus dot t dot metzger at intel dot com
- To: gdb-patches at sourceware dot org
- Cc: markus dot t dot metzger at gmail dot com, Markus Metzger <markus dot t dot metzger at intel dot com>
- Date: Thu, 10 May 2012 17:13:23 +0200
- Subject: [PATCH 09/16] btrace, linux: add linux native btrace target ops
- References: <1336662810-21937-1-git-send-email-markus.t.metzger@intel.com>
From: Markus Metzger <markus.t.metzger@intel.com>
Implement btrace target ops for linux native based on the common linux btrace
support.
We use a separate file for this to allow sharing between multiple targets
(i.e. i386 and x86_64) and to avoid having to guard this for targets that do not
support branch tracing.
2012-05-10 Markus Metzger <markus.t.metzger@intel.com>
gdb/
* linux-nat-btrace.h: New file
* linux-nat-btrace.c: New file
---
gdb/linux-nat-btrace.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++++
gdb/linux-nat-btrace.h | 28 +++++++++++++++
2 files changed, 114 insertions(+), 0 deletions(-)
create mode 100644 gdb/linux-nat-btrace.c
create mode 100644 gdb/linux-nat-btrace.h
diff --git a/gdb/linux-nat-btrace.c b/gdb/linux-nat-btrace.c
new file mode 100644
index 0000000..f69fc6f
--- /dev/null
+++ b/gdb/linux-nat-btrace.c
@@ -0,0 +1,86 @@
+/* Branch trace support for GDB, the GNU debugger.
+
+ Copyright (C) 2012 Free Software Foundation, Inc.
+
+ Contributed by Intel Corp. <markus.t.metzger@intel.com>.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "linux-nat-btrace.h"
+#include "linux-btrace.h"
+#include "btrace.h"
+#include "target.h"
+#include "gdbarch.h"
+#include "arch-utils.h"
+#include <errno.h>
+
+static int
+linux_nat_push_btrace_record (struct linux_btrace_block *raw, void *arg)
+{
+ VEC (btrace_block_s) **btrace = arg;
+ struct btrace_block *block;
+
+ if (!raw)
+ return EINVAL;
+
+ if (!btrace)
+ return EINVAL;
+
+ block = VEC_safe_push (btrace_block_s, *btrace, NULL);
+ if (!block)
+ return ENOMEM;
+
+ block->begin = raw->begin;
+ block->end = raw->end;
+
+ return 0;
+}
+
+static VEC (btrace_block_s) *
+linux_nat_read_btrace (struct btrace_target_info *tinfo)
+{
+ VEC (btrace_block_s) *btrace = NULL;
+ int errcode;
+
+ if (!tinfo)
+ {
+ errno = EINVAL;
+ return NULL;
+ }
+ if (!tinfo->ptr_bits)
+ {
+ struct gdbarch *gdbarch = get_current_arch ();
+ if (gdbarch)
+ tinfo->ptr_bits = gdbarch_ptr_bit (gdbarch);
+ }
+
+ errcode = linux_read_btrace (tinfo, linux_nat_push_btrace_record, &btrace);
+ if (errcode)
+ warning (_("error while reading branch trace data: %s. "
+ "trace might be incomplete."), safe_strerror (errcode));
+
+ return btrace;
+}
+
+void
+linux_nat_add_btrace_ops (struct target_ops *t)
+{
+ t->to_supports_btrace = linux_supports_btrace;
+ t->to_enable_btrace = linux_enable_btrace;
+ t->to_disable_btrace = linux_disable_btrace;
+ t->to_btrace_has_changed = linux_btrace_has_changed;
+ t->to_read_btrace = linux_nat_read_btrace;
+}
diff --git a/gdb/linux-nat-btrace.h b/gdb/linux-nat-btrace.h
new file mode 100644
index 0000000..cbe9c89
--- /dev/null
+++ b/gdb/linux-nat-btrace.h
@@ -0,0 +1,28 @@
+/* Branch trace support for GDB, the GNU debugger.
+
+ Copyright (C) 2012 Free Software Foundation, Inc.
+
+ Contributed by Intel Corp. <markus.t.metzger@intel.com>.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef LINUX_NAT_BTRACE_H
+#define LINUX_NAT_BTRACE_H
+
+struct target_ops;
+extern void linux_nat_add_btrace_ops (struct target_ops *);
+
+#endif /* LINUX_NAT_BTRACE_H */
--
1.7.1