From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 31537 invoked by alias); 29 Nov 2013 14:39:43 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Received: (qmail 31511 invoked by uid 89); 29 Nov 2013 14:39:42 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.6 required=5.0 tests=AWL,BAYES_50,RDNS_NONE,URIBL_BLOCKED autolearn=no version=3.3.2 X-HELO: mga09.intel.com Received: from Unknown (HELO mga09.intel.com) (134.134.136.24) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 29 Nov 2013 14:38:32 +0000 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP; 29 Nov 2013 06:34:44 -0800 X-ExtLoop1: 1 Received: from irvmail001.ir.intel.com ([163.33.26.43]) by orsmga002.jf.intel.com with ESMTP; 29 Nov 2013 06:38:22 -0800 Received: from ulvlx001.iul.intel.com (ulvlx001.iul.intel.com [172.28.207.17]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id rATEcLpm012348; Fri, 29 Nov 2013 14:38:21 GMT Received: from ulvlx001.iul.intel.com (localhost [127.0.0.1]) by ulvlx001.iul.intel.com with ESMTP id rATEcL8e012821; Fri, 29 Nov 2013 15:38:21 +0100 Received: (from mmetzger@localhost) by ulvlx001.iul.intel.com with œ id rATEcLCg012817; Fri, 29 Nov 2013 15:38:21 +0100 From: Markus Metzger To: jan.kratochvil@redhat.com Cc: gdb-patches@sourceware.org Subject: [patch v7 12/24] btrace: add replay position to btrace thread info Date: Fri, 29 Nov 2013 14:39:00 -0000 Message-Id: <1385735899-12481-13-git-send-email-markus.t.metzger@intel.com> In-Reply-To: <1385735899-12481-1-git-send-email-markus.t.metzger@intel.com> References: <1385735899-12481-1-git-send-email-markus.t.metzger@intel.com> X-IsSubscribed: yes X-SW-Source: 2013-11/txt/msg00925.txt.bz2 Add a branch trace instruction iterator pointing to the current replay position to the branch trace thread info struct. Free the iterator when btrace is cleared. Start at the replay position for the instruction and function-call histories. 2013-11-29 Markus Metzger * btrace.h (replay) : New. (btrace_is_replaying): New. * btrace.c (btrace_clear): Free replay iterator. (btrace_is_replaying): New. * record-btrace.c (record_btrace_is_replaying): New. (record_btrace_info): Print insn number if replaying. (record_btrace_insn_history): Start at replay position. (record_btrace_call_history): Start at replay position. (init_record_btrace_ops): Init to_record_is_replaying. --- gdb/btrace.c | 10 +++++++ gdb/btrace.h | 6 ++++ gdb/record-btrace.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++------ 3 files changed, 88 insertions(+), 8 deletions(-) diff --git a/gdb/btrace.c b/gdb/btrace.c index d391ad5..ad15481 100644 --- a/gdb/btrace.c +++ b/gdb/btrace.c @@ -770,9 +770,11 @@ btrace_clear (struct thread_info *tp) xfree (btinfo->insn_history); xfree (btinfo->call_history); + xfree (btinfo->replay); btinfo->insn_history = NULL; btinfo->call_history = NULL; + btinfo->replay = NULL; } /* See btrace.h. */ @@ -1328,3 +1330,11 @@ btrace_set_call_history (struct btrace_thread_info *btinfo, btinfo->call_history->begin = *begin; btinfo->call_history->end = *end; } + +/* See btrace.h. */ + +int +btrace_is_replaying (struct thread_info *tp) +{ + return tp->btrace.replay != NULL; +} diff --git a/gdb/btrace.h b/gdb/btrace.h index f4b2cc1..0a48253 100644 --- a/gdb/btrace.h +++ b/gdb/btrace.h @@ -187,6 +187,9 @@ struct btrace_thread_info /* The function call history iterator. */ struct btrace_call_history *call_history; + + /* The current replay position. NULL if not replaying. */ + struct btrace_insn_iterator *replay; }; /* Enable branch tracing for a thread. */ @@ -308,4 +311,7 @@ extern void btrace_set_call_history (struct btrace_thread_info *, const struct btrace_call_iterator *begin, const struct btrace_call_iterator *end); +/* Determine if branch tracing is currently replaying TP. */ +extern int btrace_is_replaying (struct thread_info *tp); + #endif /* BTRACE_H */ diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c index 45d5e4a..fc692aa 100644 --- a/gdb/record-btrace.c +++ b/gdb/record-btrace.c @@ -237,6 +237,10 @@ record_btrace_info (void) printf_unfiltered (_("Recorded %u instructions in %u functions for thread " "%d (%s).\n"), insns, calls, tp->num, target_pid_to_str (tp->ptid)); + + if (btrace_is_replaying (tp)) + printf_unfiltered (_("Replay in progress. At instruction %u.\n"), + btrace_insn_number (btinfo->replay)); } /* Print an unsigned int. */ @@ -301,13 +305,34 @@ record_btrace_insn_history (int size, int flags) history = btinfo->insn_history; if (history == NULL) { - /* No matter the direction, we start with the tail of the trace. */ - btrace_insn_end (&begin, btinfo); - end = begin; + struct btrace_insn_iterator *replay; DEBUG ("insn-history (0x%x): %d", flags, size); - covered = btrace_insn_prev (&begin, context); + /* If we're replaying, we start at the replay position. Otherwise, we + start at the tail of the trace. */ + replay = btinfo->replay; + if (replay != NULL) + begin = *replay; + else + btrace_insn_end (&begin, btinfo); + + /* We start from here and expand in the requested direction. Then we + expand in the other direction, as well, to fill up any remaining + context. */ + end = begin; + if (size < 0) + { + /* We want the current position covered, as well. */ + covered = btrace_insn_next (&end, 1); + covered += btrace_insn_prev (&begin, context - covered); + covered += btrace_insn_next (&end, context - covered); + } + else + { + covered = btrace_insn_next (&end, context); + covered += btrace_insn_prev (&begin, context - covered); + } } else { @@ -561,13 +586,37 @@ record_btrace_call_history (int size, int flags) history = btinfo->call_history; if (history == NULL) { - /* No matter the direction, we start with the tail of the trace. */ - btrace_call_end (&begin, btinfo); - end = begin; + struct btrace_insn_iterator *replay; DEBUG ("call-history (0x%x): %d", flags, size); - covered = btrace_call_prev (&begin, context); + /* If we're replaying, we start at the replay position. Otherwise, we + start at the tail of the trace. */ + replay = btinfo->replay; + if (replay != NULL) + { + begin.function = replay->function; + begin.btinfo = btinfo; + } + else + btrace_call_end (&begin, btinfo); + + /* We start from here and expand in the requested direction. Then we + expand in the other direction, as well, to fill up any remaining + context. */ + end = begin; + if (size < 0) + { + /* We want the current position covered, as well. */ + covered = btrace_call_next (&end, 1); + covered += btrace_call_prev (&begin, context - covered); + covered += btrace_call_next (&end, context - covered); + } + else + { + covered = btrace_call_next (&end, context); + covered += btrace_call_prev (&begin, context- covered); + } } else { @@ -688,6 +737,20 @@ record_btrace_call_history_from (ULONGEST from, int size, int flags) record_btrace_call_history_range (begin, end, flags); } +/* The to_record_is_replaying method of target record-btrace. */ + +static int +record_btrace_is_replaying (void) +{ + struct thread_info *tp; + + ALL_THREADS (tp) + if (btrace_is_replaying (tp)) + return 1; + + return 0; +} + /* Initialize the record-btrace target ops. */ static void @@ -714,6 +777,7 @@ init_record_btrace_ops (void) ops->to_call_history = record_btrace_call_history; 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_stratum = record_stratum; ops->to_magic = OPS_MAGIC; } -- 1.8.3.1