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
parent
815e777f91
commit
16f762a2ac
@ -159,7 +159,7 @@ uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')
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# CFLAGS and LDFLAGS are for the users to override from the command line.
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CFLAGS = -ggdb3 -Wall
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CFLAGS = -ggdb3 -Wall -Werror -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -std=gnu99 -Wdeclaration-after-statement
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LDFLAGS = -lpthread -lrt -lelf
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ALL_CFLAGS = $(CFLAGS)
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ALL_LDFLAGS = $(LDFLAGS)
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@ -399,7 +399,7 @@ static void get_html_page_path(struct strbuf *page_path, const char *page)
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* HTML.
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*/
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#ifndef open_html
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void open_html(const char *path)
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static void open_html(const char *path)
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{
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execl_perf_cmd("web--browse", "-c", "help.browser", path, NULL);
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}
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@ -1,6 +1,7 @@
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#include "perf.h"
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#include "builtin.h"
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#include "util/util.h"
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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@ -144,26 +145,32 @@ static int nr_poll;
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static int nr_cpu;
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struct mmap_event {
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struct perf_event_header header;
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__u32 pid, tid;
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__u64 start;
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__u64 len;
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__u64 pgoff;
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char filename[PATH_MAX];
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struct perf_event_header header;
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__u32 pid;
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__u32 tid;
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__u64 start;
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__u64 len;
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__u64 pgoff;
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char filename[PATH_MAX];
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};
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struct comm_event {
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struct perf_event_header header;
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__u32 pid,tid;
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char comm[16];
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struct perf_event_header header;
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__u32 pid;
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__u32 tid;
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char comm[16];
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};
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static pid_t pid_synthesize_comm_event(pid_t pid)
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{
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char filename[PATH_MAX];
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char bf[BUFSIZ];
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struct comm_event comm_ev;
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char filename[PATH_MAX];
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pid_t spid, ppid;
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char bf[BUFSIZ];
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int fd, nr, ret;
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char comm[18];
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size_t size;
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int fd;
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char state;
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snprintf(filename, sizeof(filename), "/proc/%d/stat", pid);
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@ -178,12 +185,8 @@ static pid_t pid_synthesize_comm_event(pid_t pid)
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}
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close(fd);
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pid_t spid, ppid;
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char state;
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char comm[18];
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memset(&comm_ev, 0, sizeof(comm_ev));
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int nr = sscanf(bf, "%d %s %c %d %d ",
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nr = sscanf(bf, "%d %s %c %d %d ",
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&spid, comm, &state, &ppid, &comm_ev.pid);
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if (nr != 5) {
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fprintf(stderr, "couldn't get COMM and pgid, malformed %s\n",
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@ -198,7 +201,8 @@ static pid_t pid_synthesize_comm_event(pid_t pid)
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memcpy(comm_ev.comm, comm + 1, size);
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size = ALIGN(size, sizeof(uint64_t));
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comm_ev.header.size = sizeof(comm_ev) - (sizeof(comm_ev.comm) - size);
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int ret = write(output, &comm_ev, comm_ev.header.size);
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ret = write(output, &comm_ev, comm_ev.header.size);
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if (ret < 0) {
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perror("failed to write");
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exit(-1);
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@ -1,4 +1,5 @@
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#include "util/util.h"
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#include "builtin.h"
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#include <libelf.h>
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#include <gelf.h>
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@ -22,7 +23,7 @@ static int input;
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static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
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static int dump_trace = 0;
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static int verbose;
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static int verbose;
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static unsigned long page_size;
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static unsigned long mmap_window = 32;
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@ -60,10 +61,10 @@ typedef union event_union {
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} event_t;
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struct symbol {
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struct rb_node rb_node;
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uint64_t start;
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uint64_t end;
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char name[0];
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struct rb_node rb_node;
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__u64 start;
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__u64 end;
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char name[0];
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};
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static struct symbol *symbol__new(uint64_t start, uint64_t len, const char *name)
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@ -86,7 +87,7 @@ static void symbol__delete(struct symbol *self)
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static size_t symbol__fprintf(struct symbol *self, FILE *fp)
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{
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return fprintf(fp, " %lx-%lx %s\n",
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return fprintf(fp, " %llx-%llx %s\n",
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self->start, self->end, self->name);
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}
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@ -147,10 +148,12 @@ static void dso__insert_symbol(struct dso *self, struct symbol *sym)
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static struct symbol *dso__find_symbol(struct dso *self, uint64_t ip)
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{
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struct rb_node *n;
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if (self == NULL)
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return NULL;
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struct rb_node *n = self->syms.rb_node;
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n = self->syms.rb_node;
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while (n) {
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struct symbol *s = rb_entry(n, struct symbol, rb_node);
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@ -221,33 +224,42 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
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static int dso__load(struct dso *self)
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{
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int fd = open(self->name, O_RDONLY), err = -1;
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Elf_Data *symstrs;
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uint32_t nr_syms;
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int fd, err = -1;
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uint32_t index;
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GElf_Ehdr ehdr;
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GElf_Shdr shdr;
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Elf_Data *syms;
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GElf_Sym sym;
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Elf_Scn *sec;
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Elf *elf;
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fd = open(self->name, O_RDONLY);
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if (fd == -1)
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return -1;
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Elf *elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
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elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
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if (elf == NULL) {
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fprintf(stderr, "%s: cannot read %s ELF file.\n",
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__func__, self->name);
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goto out_close;
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}
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GElf_Ehdr ehdr;
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if (gelf_getehdr(elf, &ehdr) == NULL) {
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fprintf(stderr, "%s: cannot get elf header.\n", __func__);
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goto out_elf_end;
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}
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GElf_Shdr shdr;
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Elf_Scn *sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
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sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
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if (sec == NULL)
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sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
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if (sec == NULL)
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goto out_elf_end;
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Elf_Data *syms = elf_getdata(sec, NULL);
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syms = elf_getdata(sec, NULL);
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if (syms == NULL)
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goto out_elf_end;
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@ -255,14 +267,12 @@ static int dso__load(struct dso *self)
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if (sec == NULL)
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goto out_elf_end;
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Elf_Data *symstrs = elf_getdata(sec, NULL);
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symstrs = elf_getdata(sec, NULL);
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if (symstrs == NULL)
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goto out_elf_end;
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const uint32_t nr_syms = shdr.sh_size / shdr.sh_entsize;
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nr_syms = shdr.sh_size / shdr.sh_entsize;
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GElf_Sym sym;
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uint32_t index;
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elf_symtab__for_each_symbol(syms, nr_syms, index, sym) {
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struct symbol *f;
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@ -342,7 +352,7 @@ static struct dso *dsos__findnew(const char *name)
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return NULL;
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}
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void dsos__fprintf(FILE *fp)
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static void dsos__fprintf(FILE *fp)
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{
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struct dso *pos;
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@ -365,7 +375,7 @@ static int hex(char ch)
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* While we find nice hex chars, build a long_val.
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* Return number of chars processed.
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*/
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int hex2long(char *ptr, unsigned long *long_val)
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static int hex2long(char *ptr, unsigned long *long_val)
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{
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const char *p = ptr;
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*long_val = 0;
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@ -493,12 +503,6 @@ static struct map *map__new(struct mmap_event *event)
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return NULL;
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}
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static size_t map__fprintf(struct map *self, FILE *fp)
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{
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return fprintf(fp, " %lx-%lx %lx %s\n",
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self->start, self->end, self->pgoff, self->dso->name);
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}
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struct thread;
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static const char *thread__name(struct thread *self, char *bf, size_t size);
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@ -531,11 +535,6 @@ static struct symhist *symhist__new(struct symbol *sym, uint64_t ip,
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return self;
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}
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void symhist__delete(struct symhist *self)
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{
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free(self);
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}
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static void symhist__inc(struct symhist *self)
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{
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++self->count;
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@ -608,6 +607,8 @@ static int thread__symbol_incnew(struct thread *self, struct symbol *sym,
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struct symhist *sh;
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while (*p != NULL) {
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uint64_t start;
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parent = *p;
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sh = rb_entry(parent, struct symhist, rb_node);
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@ -617,7 +618,7 @@ static int thread__symbol_incnew(struct thread *self, struct symbol *sym,
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}
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/* Handle unresolved symbols too */
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const uint64_t start = !sh->sym ? sh->ip : sh->sym->start;
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start = !sh->sym ? sh->ip : sh->sym->start;
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if (ip < start)
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p = &(*p)->rb_left;
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@ -639,17 +640,6 @@ static int thread__set_comm(struct thread *self, const char *comm)
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return self->comm ? 0 : -ENOMEM;
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}
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size_t thread__maps_fprintf(struct thread *self, FILE *fp)
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{
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struct map *pos;
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size_t ret = 0;
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list_for_each_entry(pos, &self->maps, node)
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ret += map__fprintf(pos, fp);
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return ret;
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}
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static size_t thread__fprintf(struct thread *self, FILE *fp)
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{
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int ret = fprintf(fp, "thread: %d %s\n", self->pid, self->comm);
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@ -657,13 +647,14 @@ static size_t thread__fprintf(struct thread *self, FILE *fp)
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for (nd = rb_first(&self->symhists); nd; nd = rb_next(nd)) {
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struct symhist *pos = rb_entry(nd, struct symhist, rb_node);
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ret += symhist__fprintf(pos, 0, fp);
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}
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return ret;
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}
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static struct rb_root threads = RB_ROOT;
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static struct rb_root threads;
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static struct thread *threads__findnew(pid_t pid)
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{
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@ -699,11 +690,11 @@ static void thread__insert_map(struct thread *self, struct map *map)
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static struct map *thread__find_map(struct thread *self, uint64_t ip)
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{
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struct map *pos;
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if (self == NULL)
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return NULL;
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struct map *pos;
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list_for_each_entry(pos, &self->maps, node)
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if (ip >= pos->start && ip <= pos->end)
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return pos;
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@ -711,7 +702,7 @@ static struct map *thread__find_map(struct thread *self, uint64_t ip)
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return NULL;
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}
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void threads__fprintf(FILE *fp)
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static void threads__fprintf(FILE *fp)
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{
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struct rb_node *nd;
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for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
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@ -720,7 +711,7 @@ void threads__fprintf(FILE *fp)
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}
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}
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static struct rb_root global_symhists = RB_ROOT;
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static struct rb_root global_symhists;
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static void threads__insert_symhist(struct symhist *sh)
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{
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@ -852,7 +843,7 @@ static int __cmd_report(void)
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(void *)(long)(event->header.size),
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event->header.misc,
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event->ip.pid,
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(void *)event->ip.ip);
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(void *)(long)ip);
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}
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if (thread == NULL) {
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@ -866,9 +857,12 @@ static int __cmd_report(void)
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level = 'k';
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dso = kernel_dso;
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} else if (event->header.misc & PERF_EVENT_MISC_USER) {
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struct map *map;
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show = SHOW_USER;
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level = '.';
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struct map *map = thread__find_map(thread, ip);
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map = thread__find_map(thread, ip);
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if (map != NULL) {
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dso = map->dso;
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ip -= map->start + map->pgoff;
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@ -896,9 +890,9 @@ static int __cmd_report(void)
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fprintf(stderr, "%p [%p]: PERF_EVENT_MMAP: [%p(%p) @ %p]: %s\n",
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(void *)(offset + head),
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(void *)(long)(event->header.size),
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(void *)event->mmap.start,
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(void *)event->mmap.len,
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(void *)event->mmap.pgoff,
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(void *)(long)event->mmap.start,
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(void *)(long)event->mmap.len,
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(void *)(long)event->mmap.pgoff,
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event->mmap.filename);
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}
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if (thread == NULL || map == NULL) {
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@ -964,6 +958,11 @@ static int __cmd_report(void)
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return 0;
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}
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if (verbose >= 2) {
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dsos__fprintf(stdout);
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threads__fprintf(stdout);
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}
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threads__sort_symhists();
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threads__symhists_fprintf(total, stdout);
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@ -30,6 +30,7 @@
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*/
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#include "perf.h"
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#include "builtin.h"
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#include "util/util.h"
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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@ -108,7 +109,7 @@ static void create_perfstat_counter(int counter)
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}
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}
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int do_perfstat(int argc, const char **argv)
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static int do_perfstat(int argc, const char **argv)
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{
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unsigned long long t0, t1;
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int counter;
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@ -42,8 +42,8 @@
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "perf.h"
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#include "builtin.h"
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#include "util/util.h"
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#include "util/util.h"
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#include "util/parse-options.h"
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@ -5,7 +5,7 @@
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* symlink to a directory, we do not want to say it is a directory when
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* dealing with tracked content in the working tree.
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*/
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int is_directory(const char *path)
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static int is_directory(const char *path)
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{
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struct stat st;
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return (!stat(path, &st) && S_ISDIR(st.st_mode));
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@ -104,6 +104,8 @@ char *strip_path_suffix(const char *path, const char *suffix);
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extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
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extern char *perf_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
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/* perf_mkstemp() - create tmp file honoring TMPDIR variable */
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extern int perf_mkstemp(char *path, size_t len, const char *template);
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extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
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__attribute__((format (printf, 3, 4)));
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@ -309,6 +309,8 @@ extern ssize_t xread(int fd, void *buf, size_t len);
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extern ssize_t xwrite(int fd, const void *buf, size_t len);
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extern int xdup(int fd);
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extern FILE *xfdopen(int fd, const char *mode);
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extern int xmkstemp(char *template);
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static inline size_t xsize_t(off_t len)
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{
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return (size_t)len;
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