perf_counter tools: Introduce stricter C code checking

Tighten up our C code requirements:

 - disallow warnings
 - disallow declarations-mixed-with-statements
 - require proper prototypes
 - require C99 (with gcc extensions)

Fix up a ton of problems these measures unearth:

 - unused functions
 - needlessly global functions
 - missing prototypes
 - code mixed with declarations

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: 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: John Kacur <jkacur@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <20090526222155.GJ4424@ghostprotocols.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-05-27 09:10:38 +02:00
parent 815e777f91
commit 16f762a2ac
9 changed files with 83 additions and 75 deletions

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 = -ggdb3 -Wall
CFLAGS = -ggdb3 -Wall -Werror -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -std=gnu99 -Wdeclaration-after-statement
LDFLAGS = -lpthread -lrt -lelf
ALL_CFLAGS = $(CFLAGS)
ALL_LDFLAGS = $(LDFLAGS)

View File

@ -399,7 +399,7 @@ static void get_html_page_path(struct strbuf *page_path, const char *page)
* HTML.
*/
#ifndef open_html
void open_html(const char *path)
static void open_html(const char *path)
{
execl_perf_cmd("web--browse", "-c", "help.browser", path, NULL);
}

View File

@ -1,6 +1,7 @@
#include "perf.h"
#include "builtin.h"
#include "util/util.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
@ -144,26 +145,32 @@ static int nr_poll;
static int nr_cpu;
struct mmap_event {
struct perf_event_header header;
__u32 pid, tid;
__u64 start;
__u64 len;
__u64 pgoff;
char filename[PATH_MAX];
struct perf_event_header header;
__u32 pid;
__u32 tid;
__u64 start;
__u64 len;
__u64 pgoff;
char filename[PATH_MAX];
};
struct comm_event {
struct perf_event_header header;
__u32 pid,tid;
char comm[16];
struct perf_event_header header;
__u32 pid;
__u32 tid;
char comm[16];
};
static pid_t pid_synthesize_comm_event(pid_t pid)
{
char filename[PATH_MAX];
char bf[BUFSIZ];
struct comm_event comm_ev;
char filename[PATH_MAX];
pid_t spid, ppid;
char bf[BUFSIZ];
int fd, nr, ret;
char comm[18];
size_t size;
int fd;
char state;
snprintf(filename, sizeof(filename), "/proc/%d/stat", pid);
@ -178,12 +185,8 @@ static pid_t pid_synthesize_comm_event(pid_t pid)
}
close(fd);
pid_t spid, ppid;
char state;
char comm[18];
memset(&comm_ev, 0, sizeof(comm_ev));
int nr = sscanf(bf, "%d %s %c %d %d ",
nr = sscanf(bf, "%d %s %c %d %d ",
&spid, comm, &state, &ppid, &comm_ev.pid);
if (nr != 5) {
fprintf(stderr, "couldn't get COMM and pgid, malformed %s\n",
@ -198,7 +201,8 @@ static pid_t pid_synthesize_comm_event(pid_t pid)
memcpy(comm_ev.comm, comm + 1, size);
size = ALIGN(size, sizeof(uint64_t));
comm_ev.header.size = sizeof(comm_ev) - (sizeof(comm_ev.comm) - size);
int ret = write(output, &comm_ev, comm_ev.header.size);
ret = write(output, &comm_ev, comm_ev.header.size);
if (ret < 0) {
perror("failed to write");
exit(-1);

View File

@ -1,4 +1,5 @@
#include "util/util.h"
#include "builtin.h"
#include <libelf.h>
#include <gelf.h>
@ -22,7 +23,7 @@ static int input;
static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
static int dump_trace = 0;
static int verbose;
static int verbose;
static unsigned long page_size;
static unsigned long mmap_window = 32;
@ -60,10 +61,10 @@ typedef union event_union {
} event_t;
struct symbol {
struct rb_node rb_node;
uint64_t start;
uint64_t end;
char name[0];
struct rb_node rb_node;
__u64 start;
__u64 end;
char name[0];
};
static struct symbol *symbol__new(uint64_t start, uint64_t len, const char *name)
@ -86,7 +87,7 @@ static void symbol__delete(struct symbol *self)
static size_t symbol__fprintf(struct symbol *self, FILE *fp)
{
return fprintf(fp, " %lx-%lx %s\n",
return fprintf(fp, " %llx-%llx %s\n",
self->start, self->end, self->name);
}
@ -147,10 +148,12 @@ static void dso__insert_symbol(struct dso *self, struct symbol *sym)
static struct symbol *dso__find_symbol(struct dso *self, uint64_t ip)
{
struct rb_node *n;
if (self == NULL)
return NULL;
struct rb_node *n = self->syms.rb_node;
n = self->syms.rb_node;
while (n) {
struct symbol *s = rb_entry(n, struct symbol, rb_node);
@ -221,33 +224,42 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
static int dso__load(struct dso *self)
{
int fd = open(self->name, O_RDONLY), err = -1;
Elf_Data *symstrs;
uint32_t nr_syms;
int fd, err = -1;
uint32_t index;
GElf_Ehdr ehdr;
GElf_Shdr shdr;
Elf_Data *syms;
GElf_Sym sym;
Elf_Scn *sec;
Elf *elf;
fd = open(self->name, O_RDONLY);
if (fd == -1)
return -1;
Elf *elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
if (elf == NULL) {
fprintf(stderr, "%s: cannot read %s ELF file.\n",
__func__, self->name);
goto out_close;
}
GElf_Ehdr ehdr;
if (gelf_getehdr(elf, &ehdr) == NULL) {
fprintf(stderr, "%s: cannot get elf header.\n", __func__);
goto out_elf_end;
}
GElf_Shdr shdr;
Elf_Scn *sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
if (sec == NULL)
sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
if (sec == NULL)
goto out_elf_end;
Elf_Data *syms = elf_getdata(sec, NULL);
syms = elf_getdata(sec, NULL);
if (syms == NULL)
goto out_elf_end;
@ -255,14 +267,12 @@ static int dso__load(struct dso *self)
if (sec == NULL)
goto out_elf_end;
Elf_Data *symstrs = elf_getdata(sec, NULL);
symstrs = elf_getdata(sec, NULL);
if (symstrs == NULL)
goto out_elf_end;
const uint32_t nr_syms = shdr.sh_size / shdr.sh_entsize;
nr_syms = shdr.sh_size / shdr.sh_entsize;
GElf_Sym sym;
uint32_t index;
elf_symtab__for_each_symbol(syms, nr_syms, index, sym) {
struct symbol *f;
@ -342,7 +352,7 @@ out_delete_dso:
return NULL;
}
void dsos__fprintf(FILE *fp)
static void dsos__fprintf(FILE *fp)
{
struct dso *pos;
@ -365,7 +375,7 @@ static int hex(char ch)
* While we find nice hex chars, build a long_val.
* Return number of chars processed.
*/
int hex2long(char *ptr, unsigned long *long_val)
static int hex2long(char *ptr, unsigned long *long_val)
{
const char *p = ptr;
*long_val = 0;
@ -493,12 +503,6 @@ out_delete:
return NULL;
}
static size_t map__fprintf(struct map *self, FILE *fp)
{
return fprintf(fp, " %lx-%lx %lx %s\n",
self->start, self->end, self->pgoff, self->dso->name);
}
struct thread;
static const char *thread__name(struct thread *self, char *bf, size_t size);
@ -531,11 +535,6 @@ static struct symhist *symhist__new(struct symbol *sym, uint64_t ip,
return self;
}
void symhist__delete(struct symhist *self)
{
free(self);
}
static void symhist__inc(struct symhist *self)
{
++self->count;
@ -608,6 +607,8 @@ static int thread__symbol_incnew(struct thread *self, struct symbol *sym,
struct symhist *sh;
while (*p != NULL) {
uint64_t start;
parent = *p;
sh = rb_entry(parent, struct symhist, rb_node);
@ -617,7 +618,7 @@ static int thread__symbol_incnew(struct thread *self, struct symbol *sym,
}
/* Handle unresolved symbols too */
const uint64_t start = !sh->sym ? sh->ip : sh->sym->start;
start = !sh->sym ? sh->ip : sh->sym->start;
if (ip < start)
p = &(*p)->rb_left;
@ -639,17 +640,6 @@ static int thread__set_comm(struct thread *self, const char *comm)
return self->comm ? 0 : -ENOMEM;
}
size_t thread__maps_fprintf(struct thread *self, FILE *fp)
{
struct map *pos;
size_t ret = 0;
list_for_each_entry(pos, &self->maps, node)
ret += map__fprintf(pos, fp);
return ret;
}
static size_t thread__fprintf(struct thread *self, FILE *fp)
{
int ret = fprintf(fp, "thread: %d %s\n", self->pid, self->comm);
@ -657,13 +647,14 @@ static size_t thread__fprintf(struct thread *self, FILE *fp)
for (nd = rb_first(&self->symhists); nd; nd = rb_next(nd)) {
struct symhist *pos = rb_entry(nd, struct symhist, rb_node);
ret += symhist__fprintf(pos, 0, fp);
}
return ret;
}
static struct rb_root threads = RB_ROOT;
static struct rb_root threads;
static struct thread *threads__findnew(pid_t pid)
{
@ -699,11 +690,11 @@ static void thread__insert_map(struct thread *self, struct map *map)
static struct map *thread__find_map(struct thread *self, uint64_t ip)
{
struct map *pos;
if (self == NULL)
return NULL;
struct map *pos;
list_for_each_entry(pos, &self->maps, node)
if (ip >= pos->start && ip <= pos->end)
return pos;
@ -711,7 +702,7 @@ static struct map *thread__find_map(struct thread *self, uint64_t ip)
return NULL;
}
void threads__fprintf(FILE *fp)
static void threads__fprintf(FILE *fp)
{
struct rb_node *nd;
for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
@ -720,7 +711,7 @@ void threads__fprintf(FILE *fp)
}
}
static struct rb_root global_symhists = RB_ROOT;
static struct rb_root global_symhists;
static void threads__insert_symhist(struct symhist *sh)
{
@ -852,7 +843,7 @@ more:
(void *)(long)(event->header.size),
event->header.misc,
event->ip.pid,
(void *)event->ip.ip);
(void *)(long)ip);
}
if (thread == NULL) {
@ -866,9 +857,12 @@ more:
level = 'k';
dso = kernel_dso;
} else if (event->header.misc & PERF_EVENT_MISC_USER) {
struct map *map;
show = SHOW_USER;
level = '.';
struct map *map = thread__find_map(thread, ip);
map = thread__find_map(thread, ip);
if (map != NULL) {
dso = map->dso;
ip -= map->start + map->pgoff;
@ -896,9 +890,9 @@ more:
fprintf(stderr, "%p [%p]: PERF_EVENT_MMAP: [%p(%p) @ %p]: %s\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
(void *)event->mmap.start,
(void *)event->mmap.len,
(void *)event->mmap.pgoff,
(void *)(long)event->mmap.start,
(void *)(long)event->mmap.len,
(void *)(long)event->mmap.pgoff,
event->mmap.filename);
}
if (thread == NULL || map == NULL) {
@ -964,6 +958,11 @@ done:
return 0;
}
if (verbose >= 2) {
dsos__fprintf(stdout);
threads__fprintf(stdout);
}
threads__sort_symhists();
threads__symhists_fprintf(total, stdout);

View File

@ -30,6 +30,7 @@
*/
#include "perf.h"
#include "builtin.h"
#include "util/util.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
@ -108,7 +109,7 @@ static void create_perfstat_counter(int counter)
}
}
int do_perfstat(int argc, const char **argv)
static int do_perfstat(int argc, const char **argv)
{
unsigned long long t0, t1;
int counter;

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@ -42,8 +42,8 @@
* Released under the GPL v2. (and only v2, not any later version)
*/
#include "perf.h"
#include "builtin.h"
#include "util/util.h"
#include "util/util.h"
#include "util/parse-options.h"

View File

@ -5,7 +5,7 @@
* symlink to a directory, we do not want to say it is a directory when
* dealing with tracked content in the working tree.
*/
int is_directory(const char *path)
static int is_directory(const char *path)
{
struct stat st;
return (!stat(path, &st) && S_ISDIR(st.st_mode));

View File

@ -104,6 +104,8 @@ char *strip_path_suffix(const char *path, const char *suffix);
extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
extern char *perf_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
/* perf_mkstemp() - create tmp file honoring TMPDIR variable */
extern int perf_mkstemp(char *path, size_t len, const char *template);
extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
__attribute__((format (printf, 3, 4)));

View File

@ -309,6 +309,8 @@ extern ssize_t xread(int fd, void *buf, size_t len);
extern ssize_t xwrite(int fd, const void *buf, size_t len);
extern int xdup(int fd);
extern FILE *xfdopen(int fd, const char *mode);
extern int xmkstemp(char *template);
static inline size_t xsize_t(off_t len)
{
return (size_t)len;