Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "A pile of perf updates:

   - Fix broken sanity check in the /proc/sys/kernel/perf_cpu_time_max_percent
     write handler

   - Cure a perf script crash which caused by an unitinialized data
     structure

   - Highlight the hottest instruction in perf top and not a random one

   - Cure yet another clang issue when building perf python

   - Handle topology entries with no CPU correctly in the tools

   - Handle perf data which contains both tracepoints and performance
     counter entries correctly.

   - Add a missing NULL pointer check in perf ordered_events_free()"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf script: Fix crash when processing recorded stat data
  perf top: Fix wrong hottest instruction highlighted
  perf tools: Handle TOPOLOGY headers with no CPU
  perf python: Remove -fstack-clash-protection when building with some clang versions
  perf core: Fix perf_proc_update_handler() bug
  perf script: Fix crash with printing mixed trace point and other events
  perf ordered_events: Fix crash in ordered_events__free
This commit is contained in:
Linus Torvalds 2019-02-03 08:59:51 -08:00
commit 58f6d4287a
6 changed files with 35 additions and 23 deletions

View File

@ -436,18 +436,18 @@ int perf_proc_update_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp,
loff_t *ppos)
{
int ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
if (ret || !write)
return ret;
int ret;
int perf_cpu = sysctl_perf_cpu_time_max_percent;
/*
* If throttling is disabled don't allow the write:
*/
if (sysctl_perf_cpu_time_max_percent == 100 ||
sysctl_perf_cpu_time_max_percent == 0)
if (write && (perf_cpu == 100 || perf_cpu == 0))
return -EINVAL;
ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
if (ret || !write)
return ret;
max_samples_per_tick = DIV_ROUND_UP(sysctl_perf_event_sample_rate, HZ);
perf_sample_period_ns = NSEC_PER_SEC / sysctl_perf_event_sample_rate;
update_perf_cpu_limits();

View File

@ -1681,13 +1681,8 @@ static void perf_sample__fprint_metric(struct perf_script *script,
.force_header = false,
};
struct perf_evsel *ev2;
static bool init;
u64 val;
if (!init) {
perf_stat__init_shadow_stats();
init = true;
}
if (!evsel->stats)
perf_evlist__alloc_stats(script->session->evlist, false);
if (evsel_script(evsel->leader)->gnum++ == 0)
@ -1794,7 +1789,7 @@ static void process_event(struct perf_script *script,
return;
}
if (PRINT_FIELD(TRACE)) {
if (PRINT_FIELD(TRACE) && sample->raw_data) {
event_format__fprintf(evsel->tp_format, sample->cpu,
sample->raw_data, sample->raw_size, fp);
}
@ -2359,6 +2354,8 @@ static int __cmd_script(struct perf_script *script)
signal(SIGINT, sig_handler);
perf_stat__init_shadow_stats();
/* override event processing functions */
if (script->show_task_events) {
script->tool.comm = process_comm_event;

View File

@ -224,20 +224,24 @@ static unsigned int annotate_browser__refresh(struct ui_browser *browser)
return ret;
}
static int disasm__cmp(struct annotation_line *a, struct annotation_line *b)
static double disasm__cmp(struct annotation_line *a, struct annotation_line *b,
int percent_type)
{
int i;
for (i = 0; i < a->data_nr; i++) {
if (a->data[i].percent == b->data[i].percent)
if (a->data[i].percent[percent_type] == b->data[i].percent[percent_type])
continue;
return a->data[i].percent < b->data[i].percent;
return a->data[i].percent[percent_type] -
b->data[i].percent[percent_type];
}
return 0;
}
static void disasm_rb_tree__insert(struct rb_root *root, struct annotation_line *al)
static void disasm_rb_tree__insert(struct annotate_browser *browser,
struct annotation_line *al)
{
struct rb_root *root = &browser->entries;
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
struct annotation_line *l;
@ -246,7 +250,7 @@ static void disasm_rb_tree__insert(struct rb_root *root, struct annotation_line
parent = *p;
l = rb_entry(parent, struct annotation_line, rb_node);
if (disasm__cmp(al, l))
if (disasm__cmp(al, l, browser->opts->percent_type) < 0)
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
@ -329,7 +333,7 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
RB_CLEAR_NODE(&pos->al.rb_node);
continue;
}
disasm_rb_tree__insert(&browser->entries, &pos->al);
disasm_rb_tree__insert(browser, &pos->al);
}
pthread_mutex_unlock(&notes->lock);

View File

@ -134,7 +134,12 @@ struct cpu_map *cpu_map__new(const char *cpu_list)
if (!cpu_list)
return cpu_map__read_all_cpu_map();
if (!isdigit(*cpu_list))
/*
* must handle the case of empty cpumap to cover
* TOPOLOGY header for NUMA nodes with no CPU
* ( e.g., because of CPU hotplug)
*/
if (!isdigit(*cpu_list) && *cpu_list != '\0')
goto out;
while (isdigit(*cpu_list)) {
@ -181,8 +186,10 @@ struct cpu_map *cpu_map__new(const char *cpu_list)
if (nr_cpus > 0)
cpus = cpu_map__trim_new(nr_cpus, tmp_cpus);
else
else if (*cpu_list != '\0')
cpus = cpu_map__default_new();
else
cpus = cpu_map__dummy_new();
invalid:
free(tmp_cpus);
out:

View File

@ -391,8 +391,10 @@ void ordered_events__free(struct ordered_events *oe)
* Current buffer might not have all the events allocated
* yet, we need to free only allocated ones ...
*/
list_del(&oe->buffer->list);
ordered_events_buffer__free(oe->buffer, oe->buffer_idx, oe);
if (oe->buffer) {
list_del(&oe->buffer->list);
ordered_events_buffer__free(oe->buffer, oe->buffer_idx, oe);
}
/* ... and continue with the rest */
list_for_each_entry_safe(buffer, tmp, &oe->to_free, list) {

View File

@ -17,6 +17,8 @@ if cc == "clang":
vars[var] = sub("-mcet", "", vars[var])
if not clang_has_option("-fcf-protection"):
vars[var] = sub("-fcf-protection", "", vars[var])
if not clang_has_option("-fstack-clash-protection"):
vars[var] = sub("-fstack-clash-protection", "", vars[var])
from distutils.core import setup, Extension