Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar. * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf: Fix perf_event_for_each() to use sibling perf symbols: Read plt symbols from proper symtab_type binary tracing: Fix stacktrace of latency tracers (irqsoff and friends) perf tools: Add 'G' and 'H' modifiers to event parsing tracing: Fix regression with tracing_on perf tools: Drop CROSS_COMPILE from flex and bison calls perf report: Fix crash showing warning related to kernel maps tracing: Fix build breakage without CONFIG_PERF_EVENTS (again)
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commit
06fc5d3d24
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@ -3183,7 +3183,7 @@ static void perf_event_for_each(struct perf_event *event,
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perf_event_for_each_child(event, func);
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func(event);
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list_for_each_entry(sibling, &event->sibling_list, group_entry)
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perf_event_for_each_child(event, func);
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perf_event_for_each_child(sibling, func);
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mutex_unlock(&ctx->mutex);
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}
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@ -4629,7 +4629,8 @@ static ssize_t
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rb_simple_read(struct file *filp, char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct ring_buffer *buffer = filp->private_data;
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struct trace_array *tr = filp->private_data;
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struct ring_buffer *buffer = tr->buffer;
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char buf[64];
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int r;
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@ -4647,7 +4648,8 @@ static ssize_t
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rb_simple_write(struct file *filp, const char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct ring_buffer *buffer = filp->private_data;
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struct trace_array *tr = filp->private_data;
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struct ring_buffer *buffer = tr->buffer;
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unsigned long val;
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int ret;
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@ -4734,7 +4736,7 @@ static __init int tracer_init_debugfs(void)
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&trace_clock_fops);
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trace_create_file("tracing_on", 0644, d_tracer,
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global_trace.buffer, &rb_simple_fops);
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&global_trace, &rb_simple_fops);
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#ifdef CONFIG_DYNAMIC_FTRACE
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trace_create_file("dyn_ftrace_total_info", 0444, d_tracer,
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@ -836,11 +836,11 @@ extern const char *__stop___trace_bprintk_fmt[];
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filter)
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#include "trace_entries.h"
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#ifdef CONFIG_FUNCTION_TRACER
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#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_FUNCTION_TRACER)
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int perf_ftrace_event_register(struct ftrace_event_call *call,
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enum trace_reg type, void *data);
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#else
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#define perf_ftrace_event_register NULL
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#endif /* CONFIG_FUNCTION_TRACER */
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#endif
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#endif /* _LINUX_KERNEL_TRACE_H */
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@ -652,6 +652,8 @@ int trace_print_lat_context(struct trace_iterator *iter)
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{
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u64 next_ts;
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int ret;
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/* trace_find_next_entry will reset ent_size */
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int ent_size = iter->ent_size;
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struct trace_seq *s = &iter->seq;
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struct trace_entry *entry = iter->ent,
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*next_entry = trace_find_next_entry(iter, NULL,
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@ -660,6 +662,9 @@ int trace_print_lat_context(struct trace_iterator *iter)
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unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start);
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unsigned long rel_usecs;
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/* Restore the original ent_size */
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iter->ent_size = ent_size;
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if (!next_entry)
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next_ts = iter->ts;
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rel_usecs = ns2usecs(next_ts - iter->ts);
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@ -234,8 +234,8 @@ endif
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export PERL_PATH
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FLEX = $(CROSS_COMPILE)flex
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BISON= $(CROSS_COMPILE)bison
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FLEX = flex
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BISON= bison
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$(OUTPUT)util/parse-events-flex.c: util/parse-events.l
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$(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/parse-events-flex.h -t util/parse-events.l > $(OUTPUT)util/parse-events-flex.c
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@ -374,16 +374,23 @@ static int __cmd_report(struct perf_report *rep)
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(kernel_map->dso->hit &&
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(kernel_kmap->ref_reloc_sym == NULL ||
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kernel_kmap->ref_reloc_sym->addr == 0))) {
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const struct dso *kdso = kernel_map->dso;
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const char *desc =
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"As no suitable kallsyms nor vmlinux was found, kernel samples\n"
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"can't be resolved.";
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if (kernel_map) {
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const struct dso *kdso = kernel_map->dso;
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if (!RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION])) {
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desc = "If some relocation was applied (e.g. "
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"kexec) symbols may be misresolved.";
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}
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}
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ui__warning(
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"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n"
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"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n"
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"Samples in kernel modules can't be resolved as well.\n\n",
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RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION]) ?
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"As no suitable kallsyms nor vmlinux was found, kernel samples\n"
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"can't be resolved." :
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"If some relocation was applied (e.g. kexec) symbols may be misresolved.");
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desc);
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}
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if (dump_trace) {
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@ -851,6 +851,28 @@ static int test__checkevent_symbolic_name_modifier(struct perf_evlist *evlist)
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return test__checkevent_symbolic_name(evlist);
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}
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static int test__checkevent_exclude_host_modifier(struct perf_evlist *evlist)
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{
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struct perf_evsel *evsel = list_entry(evlist->entries.next,
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struct perf_evsel, node);
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TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
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TEST_ASSERT_VAL("wrong exclude host", evsel->attr.exclude_host);
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return test__checkevent_symbolic_name(evlist);
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}
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static int test__checkevent_exclude_guest_modifier(struct perf_evlist *evlist)
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{
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struct perf_evsel *evsel = list_entry(evlist->entries.next,
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struct perf_evsel, node);
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TEST_ASSERT_VAL("wrong exclude guest", evsel->attr.exclude_guest);
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TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
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return test__checkevent_symbolic_name(evlist);
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}
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static int test__checkevent_symbolic_alias_modifier(struct perf_evlist *evlist)
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{
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struct perf_evsel *evsel = list_entry(evlist->entries.next,
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@ -1091,6 +1113,14 @@ static struct test__event_st {
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.name = "r1,syscalls:sys_enter_open:k,1:1:hp",
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.check = test__checkevent_list,
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},
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{
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.name = "instructions:G",
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.check = test__checkevent_exclude_host_modifier,
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},
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{
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.name = "instructions:H",
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.check = test__checkevent_exclude_guest_modifier,
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},
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};
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#define TEST__EVENTS_CNT (sizeof(test__events) / sizeof(struct test__event_st))
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@ -54,7 +54,7 @@ num_dec [0-9]+
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num_hex 0x[a-fA-F0-9]+
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num_raw_hex [a-fA-F0-9]+
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name [a-zA-Z_*?][a-zA-Z0-9_*?]*
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modifier_event [ukhp]{1,5}
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modifier_event [ukhpGH]{1,8}
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modifier_bp [rwx]
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%%
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@ -977,8 +977,9 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
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* And always look at the original dso, not at debuginfo packages, that
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* have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
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*/
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static int dso__synthesize_plt_symbols(struct dso *dso, struct map *map,
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symbol_filter_t filter)
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static int
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dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map,
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symbol_filter_t filter)
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{
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uint32_t nr_rel_entries, idx;
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GElf_Sym sym;
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char sympltname[1024];
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Elf *elf;
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int nr = 0, symidx, fd, err = 0;
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char name[PATH_MAX];
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snprintf(name, sizeof(name), "%s%s",
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symbol_conf.symfs, dso->long_name);
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fd = open(name, O_RDONLY);
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if (fd < 0)
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goto out;
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continue;
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if (ret > 0) {
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int nr_plt = dso__synthesize_plt_symbols(dso, map,
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filter);
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int nr_plt;
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nr_plt = dso__synthesize_plt_symbols(dso, name, map, filter);
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if (nr_plt > 0)
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ret += nr_plt;
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break;
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