diff options
Diffstat (limited to 'kernel/trace/trace_branch.c')
-rw-r--r-- | kernel/trace/trace_branch.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c index 6c00feb..c15222a 100644 --- a/kernel/trace/trace_branch.c +++ b/kernel/trace/trace_branch.c @@ -14,7 +14,9 @@ #include <linux/hash.h> #include <linux/fs.h> #include <asm/local.h> + #include "trace.h" +#include "trace_output.h" #ifdef CONFIG_BRANCH_TRACER @@ -142,6 +144,49 @@ static void branch_trace_reset(struct trace_array *tr) stop_branch_trace(tr); } +static int +trace_print_print(struct trace_seq *s, struct trace_entry *entry, int flags) +{ + struct print_entry *field; + + trace_assign_type(field, entry); + + if (seq_print_ip_sym(s, field->ip, flags)) + goto partial; + + if (trace_seq_printf(s, ": %s", field->buf)) + goto partial; + + partial: + return TRACE_TYPE_PARTIAL_LINE; +} + +static int +trace_branch_print(struct trace_seq *s, struct trace_entry *entry, int flags) +{ + struct trace_branch *field; + + trace_assign_type(field, entry); + + if (trace_seq_printf(s, "[%s] %s:%s:%d\n", + field->correct ? " ok " : " MISS ", + field->func, + field->file, + field->line)) + return TRACE_TYPE_PARTIAL_LINE; + + return 0; +} + +static struct trace_event trace_branch_event = { + .type = TRACE_BRANCH, + .trace = trace_branch_print, + .latency_trace = trace_branch_print, + .raw = trace_nop_print, + .hex = trace_nop_print, + .binary = trace_nop_print, +}; + struct tracer branch_trace __read_mostly = { .name = "branch", @@ -154,6 +199,14 @@ struct tracer branch_trace __read_mostly = __init static int init_branch_trace(void) { + int ret; + + ret = register_ftrace_event(&trace_branch_event); + if (!ret) { + printk(KERN_WARNING "Warning: could not register branch events\n"); + return 1; + } + return register_tracer(&branch_trace); } |