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OpenCloudOS-Kernel
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Merge branch 'tip/tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/core

This commit is contained in:
Ingo Molnar 2010-02-27 10:41:16 +01:00
parent 6fb83029db f1c7f517a5
commit 480917427b
1 changed files with 43 additions and 9 deletions
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46
kernel/trace/trace_functions_graph.c
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@ -18,6 +18,7 @@ struct fgraph_cpu_data {
pid_t last_pid;
int depth;
int ignore;
unsigned long enter_funcs[FTRACE_RETFUNC_DEPTH];
};
struct fgraph_data {
@ -670,15 +671,21 @@ print_graph_entry_leaf(struct trace_iterator *iter,
duration = graph_ret->rettime - graph_ret->calltime;
if (data) {
struct fgraph_cpu_data *cpu_data;
int cpu = iter->cpu;
int *depth = &(per_cpu_ptr(data->cpu_data, cpu)->depth);
cpu_data = per_cpu_ptr(data->cpu_data, cpu);
/*
* Comments display at + 1 to depth. Since
* this is a leaf function, keep the comments
* equal to this depth.
*/
*depth = call->depth - 1;
cpu_data->depth = call->depth - 1;
/* No need to keep this function around for this depth */
if (call->depth < FTRACE_RETFUNC_DEPTH)
cpu_data->enter_funcs[call->depth] = 0;
}
/* Overhead */
@ -718,10 +725,15 @@ print_graph_entry_nested(struct trace_iterator *iter,
int i;
if (data) {
struct fgraph_cpu_data *cpu_data;
int cpu = iter->cpu;
int *depth = &(per_cpu_ptr(data->cpu_data, cpu)->depth);
*depth = call->depth;
cpu_data = per_cpu_ptr(data->cpu_data, cpu);
cpu_data->depth = call->depth;
/* Save this function pointer to see if the exit matches */
if (call->depth < FTRACE_RETFUNC_DEPTH)
cpu_data->enter_funcs[call->depth] = call->func;
}
/* No overhead */
@ -851,18 +863,28 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
struct fgraph_data *data = iter->private;
pid_t pid = ent->pid;
int cpu = iter->cpu;
int func_match = 1;
int ret;
int i;
if (data) {
int *depth = &(per_cpu_ptr(data->cpu_data, cpu)->depth);
struct fgraph_cpu_data *cpu_data;
int cpu = iter->cpu;
cpu_data = per_cpu_ptr(data->cpu_data, cpu);
/*
* Comments display at + 1 to depth. This is the
* return from a function, we now want the comments
* to display at the same level of the bracket.
*/
*depth = trace->depth - 1;
cpu_data->depth = trace->depth - 1;
if (trace->depth < FTRACE_RETFUNC_DEPTH) {
if (cpu_data->enter_funcs[trace->depth] != trace->func)
func_match = 0;
cpu_data->enter_funcs[trace->depth] = 0;
}
}
if (print_graph_prologue(iter, s, 0, 0))
@ -887,9 +909,21 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
return TRACE_TYPE_PARTIAL_LINE;
}
/*
* If the return function does not have a matching entry,
* then the entry was lost. Instead of just printing
* the '}' and letting the user guess what function this
* belongs to, write out the function name.
*/
if (func_match) {
ret = trace_seq_printf(s, "}\n");
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
} else {
ret = trace_seq_printf(s, "} (%ps)\n", (void *)trace->func);
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
}
/* Overrun */
if (tracer_flags.val & TRACE_GRAPH_PRINT_OVERRUN) {