From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [for-next][PATCH 23/25] tracing: Make ftrace_trace_stack() depend on general trace_array flag
Date: Thu, 01 Oct 2015 07:55:47 -0400 [thread overview]
Message-ID: <20151001115639.869281620@goodmis.org> (raw)
In-Reply-To: <20151001115524.066462793@goodmis.org>
[-- Attachment #1: 0023-tracing-Make-ftrace_trace_stack-depend-on-general-tr.patch --]
[-- Type: text/plain, Size: 4758 bytes --]
From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
In preparation for the multi buffer instances to have their own trace_flags,
the check in ftrace_trace_stack() needs to test the trace_array descriptor
flag that is for the current event, not the global_trace descriptor.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
kernel/trace/trace.c | 23 +++++++++++++----------
kernel/trace/trace_events.c | 6 +++---
2 files changed, 16 insertions(+), 13 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 5f481887e98b..51697b41f5d4 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -482,7 +482,8 @@ static inline void trace_access_lock_init(void)
static void __ftrace_trace_stack(struct ring_buffer *buffer,
unsigned long flags,
int skip, int pc, struct pt_regs *regs);
-static inline void ftrace_trace_stack(struct ring_buffer *buffer,
+static inline void ftrace_trace_stack(struct trace_array *tr,
+ struct ring_buffer *buffer,
unsigned long flags,
int skip, int pc, struct pt_regs *regs);
@@ -492,7 +493,8 @@ static inline void __ftrace_trace_stack(struct ring_buffer *buffer,
int skip, int pc, struct pt_regs *regs)
{
}
-static inline void ftrace_trace_stack(struct ring_buffer *buffer,
+static inline void ftrace_trace_stack(struct trace_array *tr,
+ struct ring_buffer *buffer,
unsigned long flags,
int skip, int pc, struct pt_regs *regs)
{
@@ -574,7 +576,7 @@ int __trace_puts(unsigned long ip, const char *str, int size)
entry->buf[size] = '\0';
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, irq_flags, 4, pc, NULL);
+ ftrace_trace_stack(&global_trace, buffer, irq_flags, 4, pc, NULL);
return size;
}
@@ -614,7 +616,7 @@ int __trace_bputs(unsigned long ip, const char *str)
entry->str = str;
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, irq_flags, 4, pc, NULL);
+ ftrace_trace_stack(&global_trace, buffer, irq_flags, 4, pc, NULL);
return 1;
}
@@ -1691,7 +1693,7 @@ void trace_buffer_unlock_commit(struct trace_array *tr,
{
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, flags, 6, pc, NULL);
+ ftrace_trace_stack(tr, buffer, flags, 6, pc, NULL);
ftrace_trace_userstack(buffer, flags, pc);
}
EXPORT_SYMBOL_GPL(trace_buffer_unlock_commit);
@@ -1743,7 +1745,7 @@ void trace_buffer_unlock_commit_regs(struct trace_array *tr,
{
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, flags, 6, pc, regs);
+ ftrace_trace_stack(tr, buffer, flags, 6, pc, regs);
ftrace_trace_userstack(buffer, flags, pc);
}
EXPORT_SYMBOL_GPL(trace_buffer_unlock_commit_regs);
@@ -1872,11 +1874,12 @@ static void __ftrace_trace_stack(struct ring_buffer *buffer,
}
-static inline void ftrace_trace_stack(struct ring_buffer *buffer,
+static inline void ftrace_trace_stack(struct trace_array *tr,
+ struct ring_buffer *buffer,
unsigned long flags,
int skip, int pc, struct pt_regs *regs)
{
- if (!(global_trace.trace_flags & TRACE_ITER_STACKTRACE))
+ if (!(tr->trace_flags & TRACE_ITER_STACKTRACE))
return;
__ftrace_trace_stack(buffer, flags, skip, pc, regs);
@@ -2164,7 +2167,7 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
memcpy(entry->buf, tbuffer, sizeof(u32) * len);
if (!call_filter_check_discard(call, entry, buffer, event)) {
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, flags, 6, pc, NULL);
+ ftrace_trace_stack(tr, buffer, flags, 6, pc, NULL);
}
out:
@@ -2216,7 +2219,7 @@ __trace_array_vprintk(struct ring_buffer *buffer,
memcpy(&entry->buf, tbuffer, len + 1);
if (!call_filter_check_discard(call, entry, buffer, event)) {
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, flags, 6, pc, NULL);
+ ftrace_trace_stack(&global_trace, buffer, flags, 6, pc, NULL);
}
out:
preempt_enable_notrace();
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 0f394112a0a7..57c9e709772c 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -2941,15 +2941,15 @@ static struct ftrace_ops trace_ops __initdata =
static __init void event_trace_self_test_with_function(void)
{
int ret;
+ event_tr = top_trace_array();
+ if (WARN_ON(!event_tr))
+ return;
ret = register_ftrace_function(&trace_ops);
if (WARN_ON(ret < 0)) {
pr_info("Failed to enable function tracer for event tests\n");
return;
}
pr_info("Running tests again, along with the function tracer\n");
- event_tr = top_trace_array();
- if (WARN_ON(!event_tr))
- return;
event_trace_self_tests();
unregister_ftrace_function(&trace_ops);
}
--
2.5.1
next prev parent reply other threads:[~2015-10-01 11:57 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-01 11:55 [for-next][PATCH 00/25] tracing: Have instances have their own options + clean ups Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 01/25] kernel/trace_probe: is_good_name can be boolean Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 02/25] tracing: Move non perf code out of perf.h Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 03/25] tracing: Remove ftrace_trace_stack_regs() Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 04/25] tracing: Remove unused function trace_current_buffer_lock_reserve() Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 05/25] tracing: Pass trace_array into trace_buffer_unlock_commit() Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 06/25] tracing: Make ftrace_trace_stack() static Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 07/25] tracing: Inject seq_print_userip_objs() into its only user Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 08/25] tracing: Turn seq_print_user_ip() into a static function Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 09/25] tracing: Move "display-graph" option to main options Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 10/25] tracing: Remove unused tracing option "ftrace_preempt" Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 11/25] tracing: Use enums instead of hard coded bitmasks for TRACE_ITER flags Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 12/25] tracing: Use TRACE_FLAGS macro to keep enums and strings matched Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 13/25] tracing: Only create function graph options when it is compiled in Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 14/25] tracing: Only create branch tracer options when " Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 15/25] tracing: Do not create function tracer options when not " Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 16/25] tracing: Only create stacktrace option when STACKTRACE is configured Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 17/25] tracing: Always show all tracer options in the options directory Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 18/25] tracing: Add build bug if we have more trace_flags than bits Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 19/25] tracing: Remove access to trace_flags in trace_printk.c Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 20/25] tracing: Move sleep-time and graph-time options out of the core trace_flags Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 21/25] tracing: Move trace_flags from global to a trace_array field Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 22/25] tracing: Add a method to pass in trace_array descriptor to option files Steven Rostedt
2015-10-01 11:55 ` Steven Rostedt [this message]
2015-10-01 11:55 ` [for-next][PATCH 24/25] tracing: Add trace options for core options to instances Steven Rostedt
2015-10-01 11:55 ` [for-next][PATCH 25/25] tracing: Add trace options for tracer " Steven Rostedt
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