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perf report: Fix ELF symbol parsing

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[ Impact: fix DSO symbol output in perf report ]

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2009-05-26 15:30:22 +02:00 committed by Ingo Molnar
parent db20c00312
commit f17e04afaf
2 changed files with 22 additions and 52 deletions
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2
Documentation/perf_counter/Makefile
View File

@ -159,7 +159,7 @@ uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')
# CFLAGS and LDFLAGS are for the users to override from the command line.
CFLAGS = -g -O2 -Wall
CFLAGS = -ggdb3 -Wall
LDFLAGS = -lpthread -lrt -lelf
ALL_CFLAGS = $(CFLAGS)
ALL_LDFLAGS = $(LDFLAGS)

72
Documentation/perf_counter/builtin-report.c
View File

@ -55,34 +55,6 @@ typedef union event_union {
struct comm_event comm;
} event_t;
struct section {
struct list_head node;
uint64_t start;
uint64_t end;
uint64_t offset;
char name[0];
};
struct section *section__new(uint64_t start, uint64_t size,
uint64_t offset, char *name)
{
struct section *self = malloc(sizeof(*self) + strlen(name) + 1);
if (self != NULL) {
self->start = start;
self->end = start + size;
self->offset = offset;
strcpy(self->name, name);
}
return self;
}
static void section__delete(struct section *self)
{
free(self);
}
struct symbol {
struct rb_node rb_node;
uint64_t start;
@ -116,7 +88,6 @@ static size_t symbol__fprintf(struct symbol *self, FILE *fp)
struct dso {
struct list_head node;
struct list_head sections;
struct rb_root syms;
char name[0];
};
@ -127,21 +98,12 @@ static struct dso *dso__new(const char *name)
if (self != NULL) {
strcpy(self->name, name);
INIT_LIST_HEAD(&self->sections);
self->syms = RB_ROOT;
}
return self;
}
static void dso__delete_sections(struct dso *self)
{
struct section *pos, *n;
list_for_each_entry_safe(pos, n, &self->sections, node)
section__delete(pos);
}
static void dso__delete_symbols(struct dso *self)
{
struct symbol *pos;
@ -156,7 +118,6 @@ static void dso__delete_symbols(struct dso *self)
static void dso__delete(struct dso *self)
{
dso__delete_sections(self);
dso__delete_symbols(self);
free(self);
}
@ -282,9 +243,6 @@ static int dso__load(struct dso *self)
if (sec == NULL)
goto out_elf_end;
if (gelf_getshdr(sec, &shdr) == NULL)
goto out_elf_end;
Elf_Data *syms = elf_getdata(sec, NULL);
if (syms == NULL)
goto out_elf_end;
@ -302,11 +260,21 @@ static int dso__load(struct dso *self)
GElf_Sym sym;
uint32_t index;
elf_symtab__for_each_symbol(syms, nr_syms, index, sym) {
struct symbol *f;
if (!elf_sym__is_function(&sym))
continue;
struct symbol *f = symbol__new(sym.st_value, sym.st_size,
elf_sym__name(&sym, symstrs));
if (f == NULL)
sec = elf_getscn(elf, sym.st_shndx);
if (!sec)
goto out_elf_end;
gelf_getshdr(sec, &shdr);
sym.st_value -= shdr.sh_addr - shdr.sh_offset;
f = symbol__new(sym.st_value, sym.st_size,
elf_sym__name(&sym, symstrs));
if (!f)
goto out_elf_end;
dso__insert_symbol(self, f);
@ -498,7 +466,7 @@ static size_t symhist__fprintf(struct symhist *self, FILE *fp)
ret += fprintf(fp, "%s", self->sym ? self->sym->name: "<unknown>");
else
ret += fprintf(fp, "%s: %s",
self->dso ? self->dso->name : "<unknown",
self->dso ? self->dso->name : "<unknown>",
self->sym ? self->sym->name : "<unknown>");
return ret + fprintf(fp, ": %u\n", self->count);
}
@ -714,6 +682,7 @@ static int __cmd_report(void)
int show = 0;
struct dso *dso = NULL;
struct thread *thread = threads__findnew(event->ip.pid);
uint64_t ip = event->ip.ip;
if (thread == NULL) {
fprintf(stderr, "problem processing %d event, bailing out\n",
@ -728,19 +697,20 @@ static int __cmd_report(void)
} else if (event->header.misc & PERF_EVENT_MISC_USER) {
show = SHOW_USER;
level = '.';
struct map *map = thread__find_map(thread, event->ip.ip);
if (map != NULL)
struct map *map = thread__find_map(thread, ip);
if (map != NULL) {
dso = map->dso;
ip -= map->start + map->pgoff;
}
} else {
show = SHOW_HV;
level = 'H';
}
if (show & show_mask) {
struct symbol *sym = dso__find_symbol(dso, event->ip.ip);
struct symbol *sym = dso__find_symbol(dso, ip);
if (thread__symbol_incnew(thread, sym, event->ip.ip,
dso, level)) {
if (thread__symbol_incnew(thread, sym, ip, dso, level)) {
fprintf(stderr, "problem incrementing symbol count, bailing out\n");
goto done;
}