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perf/urgent fixes:

Browse Source 
User visible:
 
 - Fix probing at function return (Namhyumg Kim)
 
 Developer stuff:
 
 - Symbol processing changes necessary for fixing support for
   kretprobes in 'perf probe' (Namhyung Kim, Arnaldo Carvalho de Melo)
 
 - Annotation memory leaks and instruction parsing fixes (Rabin Vincent)
 
 - Fix perl build on ARM64 (Wang Nam)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

" User visible fixes:

  - Fix probing at function return (Namhyumg Kim)

  Developer visible fixes:

  - Symbol processing changes necessary for fixing support for
    kretprobes in 'perf probe' (Namhyung Kim, Arnaldo Carvalho de Melo)

  - Annotation memory leaks and instruction parsing fixes (Rabin Vincent)

  - Fix perl build on ARM64 (Wang Nam)
"

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-01-28 15:40:30 +01:00
commit e742f3dc08
7 changed files with 80 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
tools/perf/scripts/perl/Perf-Trace-Util/Context.c
View File

@ -5,7 +5,10 @@
* ANY CHANGES MADE HERE WILL BE LOST!
*
*/
#include <stdbool.h>
#ifndef HAS_BOOL
# define HAS_BOOL 1
#endif
#line 1 "Context.xs"
/*
* Context.xs. XS interfaces for perf script.

18
tools/perf/util/annotate.c
View File

@ -177,14 +177,17 @@ static int lock__parse(struct ins_operands *ops)
goto out_free_ops;
ops->locked.ins = ins__find(name);
free(name);
if (ops->locked.ins == NULL)
goto out_free_ops;
if (!ops->locked.ins->ops)
return 0;
if (ops->locked.ins->ops->parse)
ops->locked.ins->ops->parse(ops->locked.ops);
if (ops->locked.ins->ops->parse &&
ops->locked.ins->ops->parse(ops->locked.ops) < 0)
goto out_free_ops;
return 0;
@ -208,6 +211,13 @@ static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
static void lock__delete(struct ins_operands *ops)
{
struct ins *ins = ops->locked.ins;
if (ins && ins->ops->free)
ins->ops->free(ops->locked.ops);
else
ins__delete(ops->locked.ops);
zfree(&ops->locked.ops);
zfree(&ops->target.raw);
zfree(&ops->target.name);
@ -531,8 +541,8 @@ static void disasm_line__init_ins(struct disasm_line *dl)
if (!dl->ins->ops)
return;
if (dl->ins->ops->parse)
dl->ins->ops->parse(&dl->ops);
if (dl->ins->ops->parse && dl->ins->ops->parse(&dl->ops) < 0)
dl->ins = NULL;
}
static int disasm_line__parse(char *line, char **namep, char **rawp)

2
tools/perf/util/evlist.c
View File

@ -1445,7 +1445,7 @@ int perf_evlist__strerror_tp(struct perf_evlist *evlist __maybe_unused,
case ENOENT:
scnprintf(buf, size, "%s",
"Error:\tUnable to find debugfs\n"
"Hint:\tWas your kernel was compiled with debugfs support?\n"
"Hint:\tWas your kernel compiled with debugfs support?\n"
"Hint:\tIs the debugfs filesystem mounted?\n"
"Hint:\tTry 'sudo mount -t debugfs nodev /sys/kernel/debug'");
break;

16
tools/perf/util/map.h
View File

@ -116,6 +116,22 @@ struct thread;
#define map__for_each_symbol(map, pos, n) \
dso__for_each_symbol(map->dso, pos, n, map->type)
/* map__for_each_symbol_with_name - iterate over the symbols in the given map
* that have the given name
*
* @map: the 'struct map *' in which symbols itereated
* @sym_name: the symbol name
* @pos: the 'struct symbol *' to use as a loop cursor
* @filter: to use when loading the DSO
*/
#define __map__for_each_symbol_by_name(map, sym_name, pos, filter) \
for (pos = map__find_symbol_by_name(map, sym_name, filter); \
pos && strcmp(pos->name, sym_name) == 0; \
pos = symbol__next_by_name(pos))
#define map__for_each_symbol_by_name(map, sym_name, pos) \
__map__for_each_symbol_by_name(map, sym_name, (pos), NULL)
typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
void map__init(struct map *map, enum map_type type,

34
tools/perf/util/probe-event.c
View File

@ -446,7 +446,7 @@ static int post_process_probe_trace_events(struct probe_trace_event *tevs,
}
for (i = 0; i < ntevs; i++) {
if (tevs[i].point.address) {
if (tevs[i].point.address && !tevs[i].point.retprobe) {
tmp = strdup(reloc_sym->name);
if (!tmp)
return -ENOMEM;
@ -2193,18 +2193,17 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
return ret;
}
static char *looking_function_name;
static int num_matched_functions;
static int probe_function_filter(struct map *map __maybe_unused,
struct symbol *sym)
static int find_probe_functions(struct map *map, char *name)
{
if ((sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL) &&
strcmp(looking_function_name, sym->name) == 0) {
num_matched_functions++;
return 0;
int found = 0;
struct symbol *sym;
map__for_each_symbol_by_name(map, name, sym) {
if (sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL)
found++;
}
return 1;
return found;
}
#define strdup_or_goto(str, label) \
@ -2222,10 +2221,10 @@ static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
struct kmap *kmap = NULL;
struct ref_reloc_sym *reloc_sym = NULL;
struct symbol *sym;
struct rb_node *nd;
struct probe_trace_event *tev;
struct perf_probe_point *pp = &pev->point;
struct probe_trace_point *tp;
int num_matched_functions;
int ret, i;
/* Init maps of given executable or kernel */
@ -2242,10 +2241,8 @@ static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
* Load matched symbols: Since the different local symbols may have
* same name but different addresses, this lists all the symbols.
*/
num_matched_functions = 0;
looking_function_name = pp->function;
ret = map__load(map, probe_function_filter);
if (ret || num_matched_functions == 0) {
num_matched_functions = find_probe_functions(map, pp->function);
if (num_matched_functions == 0) {
pr_err("Failed to find symbol %s in %s\n", pp->function,
target ? : "kernel");
ret = -ENOENT;
@ -2257,7 +2254,7 @@ static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
goto out;
}
if (!pev->uprobes) {
if (!pev->uprobes && !pp->retprobe) {
kmap = map__kmap(map);
reloc_sym = kmap->ref_reloc_sym;
if (!reloc_sym) {
@ -2275,7 +2272,8 @@ static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
}
ret = 0;
map__for_each_symbol(map, sym, nd) {
map__for_each_symbol_by_name(map, pp->function, sym) {
tev = (*tevs) + ret;
tp = &tev->point;
if (ret == num_matched_functions) {

31
tools/perf/util/symbol.c
View File

@ -396,6 +396,7 @@ static struct symbol *symbols__find_by_name(struct rb_root *symbols,
const char *name)
{
struct rb_node *n;
struct symbol_name_rb_node *s;
if (symbols == NULL)
return NULL;
@ -403,7 +404,6 @@ static struct symbol *symbols__find_by_name(struct rb_root *symbols,
n = symbols->rb_node;
while (n) {
struct symbol_name_rb_node *s;
int cmp;
s = rb_entry(n, struct symbol_name_rb_node, rb_node);
@ -414,10 +414,24 @@ static struct symbol *symbols__find_by_name(struct rb_root *symbols,
else if (cmp > 0)
n = n->rb_right;
else
return &s->sym;
break;
}
return NULL;
if (n == NULL)
return NULL;
/* return first symbol that has same name (if any) */
for (n = rb_prev(n); n; n = rb_prev(n)) {
struct symbol_name_rb_node *tmp;
tmp = rb_entry(n, struct symbol_name_rb_node, rb_node);
if (strcmp(tmp->sym.name, s->sym.name))
break;
s = tmp;
}
return &s->sym;
}
struct symbol *dso__find_symbol(struct dso *dso,
@ -436,6 +450,17 @@ struct symbol *dso__next_symbol(struct symbol *sym)
return symbols__next(sym);
}
struct symbol *symbol__next_by_name(struct symbol *sym)
{
struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym);
struct rb_node *n = rb_next(&s->rb_node);
return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL;
}
/*
* Teturns first symbol that matched with @name.
*/
struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
const char *name)
{

1
tools/perf/util/symbol.h
View File

@ -231,6 +231,7 @@ struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
u64 addr);
struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
const char *name);
struct symbol *symbol__next_by_name(struct symbol *sym);
struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
struct symbol *dso__next_symbol(struct symbol *sym);