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tracing: Move trace_flags from global to a trace_array field

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In preparation to make trace options per instance, the global trace_flags
needs to be moved from being a global variable to a field within the trace
instance trace_array structure.

There's still more work to do, as there's some functions that use
trace_flags without passing in a way to get to the current_trace array. For
those, the global_trace is used directly (from trace.c). This includes
setting and clearing the trace_flags. This means that when a new instance is
created, it just gets the trace_flags of the global_trace and will not be
able to modify them. Depending on the functions that have access to the
trace_array, the flags of an instance may not affect parts of its trace,
where the global_trace is used. These will be fixed in future changes.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat)
2015-09-30 09:42:05 -04:00
committed by Steven Rostedt
parent 5557720415
commit 983f938ae6
10 changed files with 135 additions and 101 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
kernel/trace/trace_functions_graph.c
View File

@@ -112,8 +112,8 @@ enum {
};
static void
print_graph_duration(unsigned long long duration, struct trace_seq *s,
u32 flags);
print_graph_duration(struct trace_array *tr, unsigned long long duration,
struct trace_seq *s, u32 flags);
/* Add a function return address to the trace stack on thread info.*/
int
@@ -658,6 +658,7 @@ static void
print_graph_irq(struct trace_iterator *iter, unsigned long addr,
enum trace_type type, int cpu, pid_t pid, u32 flags)
{
struct trace_array *tr = iter->tr;
struct trace_seq *s = &iter->seq;
struct trace_entry *ent = iter->ent;
@@ -665,7 +666,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
addr >= (unsigned long)__irqentry_text_end)
return;
if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
if (tr->trace_flags & TRACE_ITER_CONTEXT_INFO) {
/* Absolute time */
if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
print_graph_abs_time(iter->ts, s);
@@ -681,19 +682,19 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
}
/* Latency format */
if (trace_flags & TRACE_ITER_LATENCY_FMT)
if (tr->trace_flags & TRACE_ITER_LATENCY_FMT)
print_graph_lat_fmt(s, ent);
}
/* No overhead */
print_graph_duration(0, s, flags | FLAGS_FILL_START);
print_graph_duration(tr, 0, s, flags | FLAGS_FILL_START);
if (type == TRACE_GRAPH_ENT)
trace_seq_puts(s, "==========>");
else
trace_seq_puts(s, "<==========");
print_graph_duration(0, s, flags | FLAGS_FILL_END);
print_graph_duration(tr, 0, s, flags | FLAGS_FILL_END);
trace_seq_putc(s, '\n');
}
@@ -731,11 +732,11 @@ trace_print_graph_duration(unsigned long long duration, struct trace_seq *s)
}
static void
print_graph_duration(unsigned long long duration, struct trace_seq *s,
u32 flags)
print_graph_duration(struct trace_array *tr, unsigned long long duration,
struct trace_seq *s, u32 flags)
{
if (!(flags & TRACE_GRAPH_PRINT_DURATION) ||
!(trace_flags & TRACE_ITER_CONTEXT_INFO))
!(tr->trace_flags & TRACE_ITER_CONTEXT_INFO))
return;
/* No real adata, just filling the column with spaces */
@@ -769,6 +770,7 @@ print_graph_entry_leaf(struct trace_iterator *iter,
struct trace_seq *s, u32 flags)
{
struct fgraph_data *data = iter->private;
struct trace_array *tr = iter->tr;
struct ftrace_graph_ret *graph_ret;
struct ftrace_graph_ent *call;
unsigned long long duration;
@@ -797,7 +799,7 @@ print_graph_entry_leaf(struct trace_iterator *iter,
}
/* Overhead and duration */
print_graph_duration(duration, s, flags);
print_graph_duration(tr, duration, s, flags);
/* Function */
for (i = 0; i < call->depth * TRACE_GRAPH_INDENT; i++)
@@ -815,6 +817,7 @@ print_graph_entry_nested(struct trace_iterator *iter,
{
struct ftrace_graph_ent *call = &entry->graph_ent;
struct fgraph_data *data = iter->private;
struct trace_array *tr = iter->tr;
int i;
if (data) {
@@ -830,7 +833,7 @@ print_graph_entry_nested(struct trace_iterator *iter,
}
/* No time */
print_graph_duration(0, s, flags | FLAGS_FILL_FULL);
print_graph_duration(tr, 0, s, flags | FLAGS_FILL_FULL);
/* Function */
for (i = 0; i < call->depth * TRACE_GRAPH_INDENT; i++)
@@ -854,6 +857,7 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
{
struct fgraph_data *data = iter->private;
struct trace_entry *ent = iter->ent;
struct trace_array *tr = iter->tr;
int cpu = iter->cpu;
/* Pid */
@@ -863,7 +867,7 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
/* Interrupt */
print_graph_irq(iter, addr, type, cpu, ent->pid, flags);
if (!(trace_flags & TRACE_ITER_CONTEXT_INFO))
if (!(tr->trace_flags & TRACE_ITER_CONTEXT_INFO))
return;
/* Absolute time */
@@ -881,7 +885,7 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
}
/* Latency format */
if (trace_flags & TRACE_ITER_LATENCY_FMT)
if (tr->trace_flags & TRACE_ITER_LATENCY_FMT)
print_graph_lat_fmt(s, ent);
return;
@@ -1032,6 +1036,7 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
{
unsigned long long duration = trace->rettime - trace->calltime;
struct fgraph_data *data = iter->private;
struct trace_array *tr = iter->tr;
pid_t pid = ent->pid;
int cpu = iter->cpu;
int func_match = 1;
@@ -1063,7 +1068,7 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
print_graph_prologue(iter, s, 0, 0, flags);
/* Overhead and duration */
print_graph_duration(duration, s, flags);
print_graph_duration(tr, duration, s, flags);
/* Closing brace */
for (i = 0; i < trace->depth * TRACE_GRAPH_INDENT; i++)
@@ -1096,7 +1101,8 @@ static enum print_line_t
print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
struct trace_iterator *iter, u32 flags)
{
unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
struct trace_array *tr = iter->tr;
unsigned long sym_flags = (tr->trace_flags & TRACE_ITER_SYM_MASK);
struct fgraph_data *data = iter->private;
struct trace_event *event;
int depth = 0;
@@ -1109,7 +1115,7 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
print_graph_prologue(iter, s, 0, 0, flags);
/* No time */
print_graph_duration(0, s, flags | FLAGS_FILL_FULL);
print_graph_duration(tr, 0, s, flags | FLAGS_FILL_FULL);
/* Indentation */
if (depth > 0)
@@ -1250,9 +1256,10 @@ static void print_lat_header(struct seq_file *s, u32 flags)
seq_printf(s, "#%.*s||| / \n", size, spaces);
}
static void __print_graph_headers_flags(struct seq_file *s, u32 flags)
static void __print_graph_headers_flags(struct trace_array *tr,
struct seq_file *s, u32 flags)
{
int lat = trace_flags & TRACE_ITER_LATENCY_FMT;
int lat = tr->trace_flags & TRACE_ITER_LATENCY_FMT;
if (lat)
print_lat_header(s, flags);
@@ -1294,11 +1301,12 @@ static void print_graph_headers(struct seq_file *s)
void print_graph_headers_flags(struct seq_file *s, u32 flags)
{
struct trace_iterator *iter = s->private;
struct trace_array *tr = iter->tr;
if (!(trace_flags & TRACE_ITER_CONTEXT_INFO))
if (!(tr->trace_flags & TRACE_ITER_CONTEXT_INFO))
return;
if (trace_flags & TRACE_ITER_LATENCY_FMT) {
if (tr->trace_flags & TRACE_ITER_LATENCY_FMT) {
/* print nothing if the buffers are empty */
if (trace_empty(iter))
return;
@@ -1306,7 +1314,7 @@ void print_graph_headers_flags(struct seq_file *s, u32 flags)
print_trace_header(s, iter);
}
__print_graph_headers_flags(s, flags);
__print_graph_headers_flags(tr, s, flags);
}
void graph_trace_open(struct trace_iterator *iter)