194b80ffdSSteven Rostedt /* 294b80ffdSSteven Rostedt * unlikely profiler 394b80ffdSSteven Rostedt * 494b80ffdSSteven Rostedt * Copyright (C) 2008 Steven Rostedt <srostedt@redhat.com> 594b80ffdSSteven Rostedt */ 694b80ffdSSteven Rostedt #include <linux/kallsyms.h> 794b80ffdSSteven Rostedt #include <linux/seq_file.h> 894b80ffdSSteven Rostedt #include <linux/spinlock.h> 965c6dc6aSFrederic Weisbecker #include <linux/irqflags.h> 1094b80ffdSSteven Rostedt #include <linux/debugfs.h> 1194b80ffdSSteven Rostedt #include <linux/uaccess.h> 1294b80ffdSSteven Rostedt #include <linux/module.h> 1394b80ffdSSteven Rostedt #include <linux/ftrace.h> 1494b80ffdSSteven Rostedt #include <linux/hash.h> 1594b80ffdSSteven Rostedt #include <linux/fs.h> 1694b80ffdSSteven Rostedt #include <asm/local.h> 17f633cef0SSteven Rostedt 1894b80ffdSSteven Rostedt #include "trace.h" 19002bb86dSFrederic Weisbecker #include "trace_stat.h" 20f633cef0SSteven Rostedt #include "trace_output.h" 2194b80ffdSSteven Rostedt 2294b80ffdSSteven Rostedt #ifdef CONFIG_BRANCH_TRACER 2394b80ffdSSteven Rostedt 24002bb86dSFrederic Weisbecker static struct tracer branch_trace; 2594b80ffdSSteven Rostedt static int branch_tracing_enabled __read_mostly; 2694b80ffdSSteven Rostedt static DEFINE_MUTEX(branch_tracing_mutex); 27e302cf3fSFrederic Weisbecker 2894b80ffdSSteven Rostedt static struct trace_array *branch_tracer; 2994b80ffdSSteven Rostedt 3094b80ffdSSteven Rostedt static void 3194b80ffdSSteven Rostedt probe_likely_condition(struct ftrace_branch_data *f, int val, int expect) 3294b80ffdSSteven Rostedt { 33e1112b4dSTom Zanussi struct ftrace_event_call *call = &event_branch; 3494b80ffdSSteven Rostedt struct trace_array *tr = branch_tracer; 35a7603ff4SSteven Rostedt struct trace_array_cpu *data; 3694b80ffdSSteven Rostedt struct ring_buffer_event *event; 3794b80ffdSSteven Rostedt struct trace_branch *entry; 388f6e8a31SSteven Rostedt struct ring_buffer *buffer; 390a987751SArnaldo Carvalho de Melo unsigned long flags; 4094b80ffdSSteven Rostedt int cpu, pc; 4194b80ffdSSteven Rostedt const char *p; 4294b80ffdSSteven Rostedt 4394b80ffdSSteven Rostedt /* 4494b80ffdSSteven Rostedt * I would love to save just the ftrace_likely_data pointer, but 4594b80ffdSSteven Rostedt * this code can also be used by modules. Ugly things can happen 4694b80ffdSSteven Rostedt * if the module is unloaded, and then we go and read the 4794b80ffdSSteven Rostedt * pointer. This is slower, but much safer. 4894b80ffdSSteven Rostedt */ 4994b80ffdSSteven Rostedt 5094b80ffdSSteven Rostedt if (unlikely(!tr)) 5194b80ffdSSteven Rostedt return; 5294b80ffdSSteven Rostedt 53a5e25883SSteven Rostedt local_irq_save(flags); 5494b80ffdSSteven Rostedt cpu = raw_smp_processor_id(); 55153e8ed9SSteven Rostedt (Red Hat) data = per_cpu_ptr(tr->trace_buffer.data, cpu); 56a7603ff4SSteven Rostedt if (atomic_inc_return(&data->disabled) != 1) 5794b80ffdSSteven Rostedt goto out; 5894b80ffdSSteven Rostedt 5951a763ddSArnaldo Carvalho de Melo pc = preempt_count(); 60153e8ed9SSteven Rostedt (Red Hat) buffer = tr->trace_buffer.buffer; 618f6e8a31SSteven Rostedt event = trace_buffer_lock_reserve(buffer, TRACE_BRANCH, 6251a763ddSArnaldo Carvalho de Melo sizeof(*entry), flags, pc); 6394b80ffdSSteven Rostedt if (!event) 6494b80ffdSSteven Rostedt goto out; 6594b80ffdSSteven Rostedt 6694b80ffdSSteven Rostedt entry = ring_buffer_event_data(event); 6794b80ffdSSteven Rostedt 6894b80ffdSSteven Rostedt /* Strip off the path, only save the file */ 6994b80ffdSSteven Rostedt p = f->file + strlen(f->file); 7094b80ffdSSteven Rostedt while (p >= f->file && *p != '/') 7194b80ffdSSteven Rostedt p--; 7294b80ffdSSteven Rostedt p++; 7394b80ffdSSteven Rostedt 7494b80ffdSSteven Rostedt strncpy(entry->func, f->func, TRACE_FUNC_SIZE); 7594b80ffdSSteven Rostedt strncpy(entry->file, p, TRACE_FILE_SIZE); 7694b80ffdSSteven Rostedt entry->func[TRACE_FUNC_SIZE] = 0; 7794b80ffdSSteven Rostedt entry->file[TRACE_FILE_SIZE] = 0; 7894b80ffdSSteven Rostedt entry->line = f->line; 7994b80ffdSSteven Rostedt entry->correct = val == expect; 8094b80ffdSSteven Rostedt 81f306cc82STom Zanussi if (!call_filter_check_discard(call, entry, buffer, event)) 827ffbd48dSSteven Rostedt __buffer_unlock_commit(buffer, event); 8394b80ffdSSteven Rostedt 8494b80ffdSSteven Rostedt out: 85a7603ff4SSteven Rostedt atomic_dec(&data->disabled); 86a5e25883SSteven Rostedt local_irq_restore(flags); 8794b80ffdSSteven Rostedt } 8894b80ffdSSteven Rostedt 8994b80ffdSSteven Rostedt static inline 9094b80ffdSSteven Rostedt void trace_likely_condition(struct ftrace_branch_data *f, int val, int expect) 9194b80ffdSSteven Rostedt { 9294b80ffdSSteven Rostedt if (!branch_tracing_enabled) 9394b80ffdSSteven Rostedt return; 9494b80ffdSSteven Rostedt 9594b80ffdSSteven Rostedt probe_likely_condition(f, val, expect); 9694b80ffdSSteven Rostedt } 9794b80ffdSSteven Rostedt 9894b80ffdSSteven Rostedt int enable_branch_tracing(struct trace_array *tr) 9994b80ffdSSteven Rostedt { 10094b80ffdSSteven Rostedt mutex_lock(&branch_tracing_mutex); 10194b80ffdSSteven Rostedt branch_tracer = tr; 10294b80ffdSSteven Rostedt /* 10394b80ffdSSteven Rostedt * Must be seen before enabling. The reader is a condition 10494b80ffdSSteven Rostedt * where we do not need a matching rmb() 10594b80ffdSSteven Rostedt */ 10694b80ffdSSteven Rostedt smp_wmb(); 10794b80ffdSSteven Rostedt branch_tracing_enabled++; 10894b80ffdSSteven Rostedt mutex_unlock(&branch_tracing_mutex); 10994b80ffdSSteven Rostedt 110f54fc98aSWenji Huang return 0; 11194b80ffdSSteven Rostedt } 11294b80ffdSSteven Rostedt 11394b80ffdSSteven Rostedt void disable_branch_tracing(void) 11494b80ffdSSteven Rostedt { 11594b80ffdSSteven Rostedt mutex_lock(&branch_tracing_mutex); 11694b80ffdSSteven Rostedt 11794b80ffdSSteven Rostedt if (!branch_tracing_enabled) 11894b80ffdSSteven Rostedt goto out_unlock; 11994b80ffdSSteven Rostedt 12094b80ffdSSteven Rostedt branch_tracing_enabled--; 12194b80ffdSSteven Rostedt 12294b80ffdSSteven Rostedt out_unlock: 12394b80ffdSSteven Rostedt mutex_unlock(&branch_tracing_mutex); 12494b80ffdSSteven Rostedt } 12594b80ffdSSteven Rostedt 12694b80ffdSSteven Rostedt static void start_branch_trace(struct trace_array *tr) 12794b80ffdSSteven Rostedt { 12894b80ffdSSteven Rostedt enable_branch_tracing(tr); 12994b80ffdSSteven Rostedt } 13094b80ffdSSteven Rostedt 13194b80ffdSSteven Rostedt static void stop_branch_trace(struct trace_array *tr) 13294b80ffdSSteven Rostedt { 13394b80ffdSSteven Rostedt disable_branch_tracing(); 13494b80ffdSSteven Rostedt } 13594b80ffdSSteven Rostedt 1361c80025aSFrederic Weisbecker static int branch_trace_init(struct trace_array *tr) 13794b80ffdSSteven Rostedt { 13894b80ffdSSteven Rostedt start_branch_trace(tr); 1391c80025aSFrederic Weisbecker return 0; 14094b80ffdSSteven Rostedt } 14194b80ffdSSteven Rostedt 14294b80ffdSSteven Rostedt static void branch_trace_reset(struct trace_array *tr) 14394b80ffdSSteven Rostedt { 14494b80ffdSSteven Rostedt stop_branch_trace(tr); 14594b80ffdSSteven Rostedt } 14694b80ffdSSteven Rostedt 147ae7462b4SArnaldo Carvalho de Melo static enum print_line_t trace_branch_print(struct trace_iterator *iter, 148a9a57763SSteven Rostedt int flags, struct trace_event *event) 149f633cef0SSteven Rostedt { 150f633cef0SSteven Rostedt struct trace_branch *field; 151f633cef0SSteven Rostedt 1522c9b238eSArnaldo Carvalho de Melo trace_assign_type(field, iter->ent); 153f633cef0SSteven Rostedt 1542c9b238eSArnaldo Carvalho de Melo if (trace_seq_printf(&iter->seq, "[%s] %s:%s:%d\n", 155f633cef0SSteven Rostedt field->correct ? " ok " : " MISS ", 156f633cef0SSteven Rostedt field->func, 157f633cef0SSteven Rostedt field->file, 158f633cef0SSteven Rostedt field->line)) 159f633cef0SSteven Rostedt return TRACE_TYPE_PARTIAL_LINE; 160f633cef0SSteven Rostedt 161d9793bd8SArnaldo Carvalho de Melo return TRACE_TYPE_HANDLED; 162f633cef0SSteven Rostedt } 163f633cef0SSteven Rostedt 164557055beSZhaolei static void branch_print_header(struct seq_file *s) 165557055beSZhaolei { 166557055beSZhaolei seq_puts(s, "# TASK-PID CPU# TIMESTAMP CORRECT" 167557055beSZhaolei " FUNC:FILE:LINE\n"); 168557055beSZhaolei seq_puts(s, "# | | | | | " 169557055beSZhaolei " |\n"); 170557055beSZhaolei } 171e302cf3fSFrederic Weisbecker 172a9a57763SSteven Rostedt static struct trace_event_functions trace_branch_funcs = { 173a9a57763SSteven Rostedt .trace = trace_branch_print, 174a9a57763SSteven Rostedt }; 175a9a57763SSteven Rostedt 176f633cef0SSteven Rostedt static struct trace_event trace_branch_event = { 177f633cef0SSteven Rostedt .type = TRACE_BRANCH, 178a9a57763SSteven Rostedt .funcs = &trace_branch_funcs, 179f633cef0SSteven Rostedt }; 180f633cef0SSteven Rostedt 181002bb86dSFrederic Weisbecker static struct tracer branch_trace __read_mostly = 182002bb86dSFrederic Weisbecker { 183002bb86dSFrederic Weisbecker .name = "branch", 184002bb86dSFrederic Weisbecker .init = branch_trace_init, 185002bb86dSFrederic Weisbecker .reset = branch_trace_reset, 186002bb86dSFrederic Weisbecker #ifdef CONFIG_FTRACE_SELFTEST 187002bb86dSFrederic Weisbecker .selftest = trace_selftest_startup_branch, 188002bb86dSFrederic Weisbecker #endif /* CONFIG_FTRACE_SELFTEST */ 189557055beSZhaolei .print_header = branch_print_header, 190002bb86dSFrederic Weisbecker }; 191002bb86dSFrederic Weisbecker 192002bb86dSFrederic Weisbecker __init static int init_branch_tracer(void) 193002bb86dSFrederic Weisbecker { 194002bb86dSFrederic Weisbecker int ret; 195002bb86dSFrederic Weisbecker 196002bb86dSFrederic Weisbecker ret = register_ftrace_event(&trace_branch_event); 197002bb86dSFrederic Weisbecker if (!ret) { 198002bb86dSFrederic Weisbecker printk(KERN_WARNING "Warning: could not register " 199002bb86dSFrederic Weisbecker "branch events\n"); 200002bb86dSFrederic Weisbecker return 1; 201002bb86dSFrederic Weisbecker } 202002bb86dSFrederic Weisbecker return register_tracer(&branch_trace); 203002bb86dSFrederic Weisbecker } 2046f415672SSteven Rostedt core_initcall(init_branch_tracer); 205002bb86dSFrederic Weisbecker 20694b80ffdSSteven Rostedt #else 20794b80ffdSSteven Rostedt static inline 20894b80ffdSSteven Rostedt void trace_likely_condition(struct ftrace_branch_data *f, int val, int expect) 20994b80ffdSSteven Rostedt { 21094b80ffdSSteven Rostedt } 21194b80ffdSSteven Rostedt #endif /* CONFIG_BRANCH_TRACER */ 21294b80ffdSSteven Rostedt 21394b80ffdSSteven Rostedt void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect) 21494b80ffdSSteven Rostedt { 21594b80ffdSSteven Rostedt /* 21694b80ffdSSteven Rostedt * I would love to have a trace point here instead, but the 21794b80ffdSSteven Rostedt * trace point code is so inundated with unlikely and likely 21894b80ffdSSteven Rostedt * conditions that the recursive nightmare that exists is too 21994b80ffdSSteven Rostedt * much to try to get working. At least for now. 22094b80ffdSSteven Rostedt */ 22194b80ffdSSteven Rostedt trace_likely_condition(f, val, expect); 22294b80ffdSSteven Rostedt 22394b80ffdSSteven Rostedt /* FIXME: Make this atomic! */ 22494b80ffdSSteven Rostedt if (val == expect) 22594b80ffdSSteven Rostedt f->correct++; 22694b80ffdSSteven Rostedt else 22794b80ffdSSteven Rostedt f->incorrect++; 22894b80ffdSSteven Rostedt } 22994b80ffdSSteven Rostedt EXPORT_SYMBOL(ftrace_likely_update); 23094b80ffdSSteven Rostedt 231e302cf3fSFrederic Weisbecker extern unsigned long __start_annotated_branch_profile[]; 232e302cf3fSFrederic Weisbecker extern unsigned long __stop_annotated_branch_profile[]; 23394b80ffdSSteven Rostedt 234e302cf3fSFrederic Weisbecker static int annotated_branch_stat_headers(struct seq_file *m) 23594b80ffdSSteven Rostedt { 2362bcd521aSSteven Rostedt seq_printf(m, " correct incorrect %% "); 2372bcd521aSSteven Rostedt seq_printf(m, " Function " 23894b80ffdSSteven Rostedt " File Line\n" 23994b80ffdSSteven Rostedt " ------- --------- - " 24094b80ffdSSteven Rostedt " -------- " 24194b80ffdSSteven Rostedt " ---- ----\n"); 24294b80ffdSSteven Rostedt return 0; 24394b80ffdSSteven Rostedt } 24494b80ffdSSteven Rostedt 245e302cf3fSFrederic Weisbecker static inline long get_incorrect_percent(struct ftrace_branch_data *p) 246e302cf3fSFrederic Weisbecker { 247e302cf3fSFrederic Weisbecker long percent; 248e302cf3fSFrederic Weisbecker 249e302cf3fSFrederic Weisbecker if (p->correct) { 250e302cf3fSFrederic Weisbecker percent = p->incorrect * 100; 251e302cf3fSFrederic Weisbecker percent /= p->correct + p->incorrect; 252e302cf3fSFrederic Weisbecker } else 253e302cf3fSFrederic Weisbecker percent = p->incorrect ? 100 : -1; 254e302cf3fSFrederic Weisbecker 255e302cf3fSFrederic Weisbecker return percent; 256e302cf3fSFrederic Weisbecker } 257e302cf3fSFrederic Weisbecker 258e302cf3fSFrederic Weisbecker static int branch_stat_show(struct seq_file *m, void *v) 259e302cf3fSFrederic Weisbecker { 260e302cf3fSFrederic Weisbecker struct ftrace_branch_data *p = v; 261e302cf3fSFrederic Weisbecker const char *f; 262e302cf3fSFrederic Weisbecker long percent; 263e302cf3fSFrederic Weisbecker 26494b80ffdSSteven Rostedt /* Only print the file, not the path */ 26594b80ffdSSteven Rostedt f = p->file + strlen(p->file); 26694b80ffdSSteven Rostedt while (f >= p->file && *f != '/') 26794b80ffdSSteven Rostedt f--; 26894b80ffdSSteven Rostedt f++; 26994b80ffdSSteven Rostedt 2702bcd521aSSteven Rostedt /* 2712bcd521aSSteven Rostedt * The miss is overlayed on correct, and hit on incorrect. 2722bcd521aSSteven Rostedt */ 273e302cf3fSFrederic Weisbecker percent = get_incorrect_percent(p); 27494b80ffdSSteven Rostedt 275bac28bfeSSteven Rostedt seq_printf(m, "%8lu %8lu ", p->correct, p->incorrect); 276bac28bfeSSteven Rostedt if (percent < 0) 277bac28bfeSSteven Rostedt seq_printf(m, " X "); 278bac28bfeSSteven Rostedt else 279bac28bfeSSteven Rostedt seq_printf(m, "%3ld ", percent); 28094b80ffdSSteven Rostedt seq_printf(m, "%-30.30s %-20.20s %d\n", p->func, f, p->line); 28194b80ffdSSteven Rostedt return 0; 28294b80ffdSSteven Rostedt } 28394b80ffdSSteven Rostedt 28442548008SSteven Rostedt static void *annotated_branch_stat_start(struct tracer_stat *trace) 28594b80ffdSSteven Rostedt { 286e302cf3fSFrederic Weisbecker return __start_annotated_branch_profile; 28794b80ffdSSteven Rostedt } 28894b80ffdSSteven Rostedt 289e302cf3fSFrederic Weisbecker static void * 290e302cf3fSFrederic Weisbecker annotated_branch_stat_next(void *v, int idx) 291e302cf3fSFrederic Weisbecker { 292e302cf3fSFrederic Weisbecker struct ftrace_branch_data *p = v; 293e302cf3fSFrederic Weisbecker 294e302cf3fSFrederic Weisbecker ++p; 295e302cf3fSFrederic Weisbecker 296e302cf3fSFrederic Weisbecker if ((void *)p >= (void *)__stop_annotated_branch_profile) 297e302cf3fSFrederic Weisbecker return NULL; 298e302cf3fSFrederic Weisbecker 299e302cf3fSFrederic Weisbecker return p; 30094b80ffdSSteven Rostedt } 30194b80ffdSSteven Rostedt 302e302cf3fSFrederic Weisbecker static int annotated_branch_stat_cmp(void *p1, void *p2) 30394b80ffdSSteven Rostedt { 304e302cf3fSFrederic Weisbecker struct ftrace_branch_data *a = p1; 305e302cf3fSFrederic Weisbecker struct ftrace_branch_data *b = p2; 30694b80ffdSSteven Rostedt 307e302cf3fSFrederic Weisbecker long percent_a, percent_b; 30894b80ffdSSteven Rostedt 309e302cf3fSFrederic Weisbecker percent_a = get_incorrect_percent(a); 310e302cf3fSFrederic Weisbecker percent_b = get_incorrect_percent(b); 31194b80ffdSSteven Rostedt 312e302cf3fSFrederic Weisbecker if (percent_a < percent_b) 313e302cf3fSFrederic Weisbecker return -1; 314e302cf3fSFrederic Weisbecker if (percent_a > percent_b) 315e302cf3fSFrederic Weisbecker return 1; 316ede55c9dSSteven Rostedt 317ede55c9dSSteven Rostedt if (a->incorrect < b->incorrect) 318ede55c9dSSteven Rostedt return -1; 319ede55c9dSSteven Rostedt if (a->incorrect > b->incorrect) 320ede55c9dSSteven Rostedt return 1; 321ede55c9dSSteven Rostedt 322ede55c9dSSteven Rostedt /* 323ede55c9dSSteven Rostedt * Since the above shows worse (incorrect) cases 324ede55c9dSSteven Rostedt * first, we continue that by showing best (correct) 325ede55c9dSSteven Rostedt * cases last. 326ede55c9dSSteven Rostedt */ 327ede55c9dSSteven Rostedt if (a->correct > b->correct) 328ede55c9dSSteven Rostedt return -1; 329ede55c9dSSteven Rostedt if (a->correct < b->correct) 330ede55c9dSSteven Rostedt return 1; 331ede55c9dSSteven Rostedt 33294b80ffdSSteven Rostedt return 0; 33394b80ffdSSteven Rostedt } 33494b80ffdSSteven Rostedt 335002bb86dSFrederic Weisbecker static struct tracer_stat annotated_branch_stats = { 336002bb86dSFrederic Weisbecker .name = "branch_annotated", 337002bb86dSFrederic Weisbecker .stat_start = annotated_branch_stat_start, 338002bb86dSFrederic Weisbecker .stat_next = annotated_branch_stat_next, 339002bb86dSFrederic Weisbecker .stat_cmp = annotated_branch_stat_cmp, 340002bb86dSFrederic Weisbecker .stat_headers = annotated_branch_stat_headers, 341002bb86dSFrederic Weisbecker .stat_show = branch_stat_show 342002bb86dSFrederic Weisbecker }; 343002bb86dSFrederic Weisbecker 344002bb86dSFrederic Weisbecker __init static int init_annotated_branch_stats(void) 345002bb86dSFrederic Weisbecker { 346002bb86dSFrederic Weisbecker int ret; 347002bb86dSFrederic Weisbecker 348002bb86dSFrederic Weisbecker ret = register_stat_tracer(&annotated_branch_stats); 349002bb86dSFrederic Weisbecker if (!ret) { 350002bb86dSFrederic Weisbecker printk(KERN_WARNING "Warning: could not register " 351002bb86dSFrederic Weisbecker "annotated branches stats\n"); 352002bb86dSFrederic Weisbecker return 1; 353002bb86dSFrederic Weisbecker } 354002bb86dSFrederic Weisbecker return 0; 355002bb86dSFrederic Weisbecker } 356002bb86dSFrederic Weisbecker fs_initcall(init_annotated_branch_stats); 357002bb86dSFrederic Weisbecker 358e302cf3fSFrederic Weisbecker #ifdef CONFIG_PROFILE_ALL_BRANCHES 359e302cf3fSFrederic Weisbecker 360e302cf3fSFrederic Weisbecker extern unsigned long __start_branch_profile[]; 361e302cf3fSFrederic Weisbecker extern unsigned long __stop_branch_profile[]; 362e302cf3fSFrederic Weisbecker 363e302cf3fSFrederic Weisbecker static int all_branch_stat_headers(struct seq_file *m) 364e302cf3fSFrederic Weisbecker { 365e302cf3fSFrederic Weisbecker seq_printf(m, " miss hit %% "); 366e302cf3fSFrederic Weisbecker seq_printf(m, " Function " 367e302cf3fSFrederic Weisbecker " File Line\n" 368e302cf3fSFrederic Weisbecker " ------- --------- - " 369e302cf3fSFrederic Weisbecker " -------- " 370e302cf3fSFrederic Weisbecker " ---- ----\n"); 371e302cf3fSFrederic Weisbecker return 0; 372e302cf3fSFrederic Weisbecker } 373e302cf3fSFrederic Weisbecker 37442548008SSteven Rostedt static void *all_branch_stat_start(struct tracer_stat *trace) 375e302cf3fSFrederic Weisbecker { 376e302cf3fSFrederic Weisbecker return __start_branch_profile; 377e302cf3fSFrederic Weisbecker } 378e302cf3fSFrederic Weisbecker 379e302cf3fSFrederic Weisbecker static void * 380e302cf3fSFrederic Weisbecker all_branch_stat_next(void *v, int idx) 381e302cf3fSFrederic Weisbecker { 382e302cf3fSFrederic Weisbecker struct ftrace_branch_data *p = v; 383e302cf3fSFrederic Weisbecker 384e302cf3fSFrederic Weisbecker ++p; 385e302cf3fSFrederic Weisbecker 386e302cf3fSFrederic Weisbecker if ((void *)p >= (void *)__stop_branch_profile) 387e302cf3fSFrederic Weisbecker return NULL; 388e302cf3fSFrederic Weisbecker 389e302cf3fSFrederic Weisbecker return p; 390e302cf3fSFrederic Weisbecker } 391e302cf3fSFrederic Weisbecker 392002bb86dSFrederic Weisbecker static struct tracer_stat all_branch_stats = { 393002bb86dSFrederic Weisbecker .name = "branch_all", 394034939b6SFrederic Weisbecker .stat_start = all_branch_stat_start, 395034939b6SFrederic Weisbecker .stat_next = all_branch_stat_next, 396034939b6SFrederic Weisbecker .stat_headers = all_branch_stat_headers, 397002bb86dSFrederic Weisbecker .stat_show = branch_stat_show 398034939b6SFrederic Weisbecker }; 399034939b6SFrederic Weisbecker 400002bb86dSFrederic Weisbecker __init static int all_annotated_branch_stats(void) 401e302cf3fSFrederic Weisbecker { 402e302cf3fSFrederic Weisbecker int ret; 403002bb86dSFrederic Weisbecker 404002bb86dSFrederic Weisbecker ret = register_stat_tracer(&all_branch_stats); 405e302cf3fSFrederic Weisbecker if (!ret) { 406002bb86dSFrederic Weisbecker printk(KERN_WARNING "Warning: could not register " 407002bb86dSFrederic Weisbecker "all branches stats\n"); 408e302cf3fSFrederic Weisbecker return 1; 409e302cf3fSFrederic Weisbecker } 410002bb86dSFrederic Weisbecker return 0; 411e302cf3fSFrederic Weisbecker } 412002bb86dSFrederic Weisbecker fs_initcall(all_annotated_branch_stats); 413002bb86dSFrederic Weisbecker #endif /* CONFIG_PROFILE_ALL_BRANCHES */ 414