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authorIngo Molnar <mingo@elte.hu>2009-08-15 14:26:57 +0400
committerIngo Molnar <mingo@elte.hu>2009-08-16 12:47:47 +0400
commit83a0944fa919fb2ebcfc1f8933d86e437b597ca6 (patch)
tree814906744656554a1bc07cdad6b84b3581565358 /tools/perf/builtin-report.c
parent6baa0a5ae0954fb2486c480a20556a9f1aee0965 (diff)
downloadlinux-83a0944fa919fb2ebcfc1f8933d86e437b597ca6.tar.xz
perf: Enable more compiler warnings
Related to a shadowed variable bug fix Valdis Kletnieks noticed that perf does not get built with -Wshadow, which could have helped us avoid the bug. So enable -Wshadow and also enable the following warnings on perf builds, in addition to the already enabled -Wall -Wextra -std=gnu99 warnings: -Wcast-align -Wformat=2 -Wshadow -Winit-self -Wpacked -Wredundant-decls -Wstack-protector -Wstrict-aliasing=3 -Wswitch-default -Wswitch-enum -Wno-system-headers -Wundef -Wvolatile-register-var -Wwrite-strings -Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement And change/fix the perf code to build cleanly under GCC 4.3.2. The list of warnings enablement is rather arbitrary: it's based on my (quick) reading of the GCC manpages and trying them on perf. I categorized the warnings based on individually enabling them and looking whether they trigger something in the perf build. If i liked those warnings (i.e. if they trigger for something that arguably could be improved) i enabled the warning. If the warnings seemed to come from language laywers spamming the build with tons of nuisance warnings i generally kept them off. Most of the sign conversion related warnings were in this category. (A second patch enabling some of the sign warnings might be welcome - sign bugs can be nasty.) I also kept warnings that seem to make sense from their manpage description and which produced no actual warnings on our code base. These warnings might still be turned off if they end up being a nuisance. I also left out a few warnings that are not supported in older compilers. [ Note that these changes might break the build on older compilers i did not test, or on non-x86 architectures that produce different warnings, so more testing would be welcome. ] Reported-by: Valdis.Kletnieks@vt.edu Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-report.c')
-rw-r--r--tools/perf/builtin-report.c38
1 files changed, 20 insertions, 18 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 298f26b8ac78..3b9d24dc0eda 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -97,6 +97,7 @@ static int repsep_fprintf(FILE *fp, const char *fmt, ...)
n = vasprintf(&bf, fmt, ap);
if (n > 0) {
char *sep = bf;
+
while (1) {
sep = strchr(sep, *field_sep);
if (sep == NULL)
@@ -144,7 +145,7 @@ struct hist_entry {
struct sort_entry {
struct list_head list;
- char *header;
+ const char *header;
int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
@@ -328,7 +329,7 @@ static int sort__need_collapse = 0;
static int sort__has_parent = 0;
struct sort_dimension {
- char *name;
+ const char *name;
struct sort_entry *entry;
int taken;
};
@@ -343,7 +344,7 @@ static struct sort_dimension sort_dimensions[] = {
static LIST_HEAD(hist_entry__sort_list);
-static int sort_dimension__add(char *tok)
+static int sort_dimension__add(const char *tok)
{
unsigned int i;
@@ -602,6 +603,7 @@ hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
case CHAIN_GRAPH_REL:
ret += callchain__fprintf_graph(fp, chain,
total_samples, 1, 1);
+ case CHAIN_NONE:
default:
break;
}
@@ -1290,7 +1292,7 @@ process_lost_event(event_t *event, unsigned long offset, unsigned long head)
static void trace_event(event_t *event)
{
unsigned char *raw_event = (void *)event;
- char *color = PERF_COLOR_BLUE;
+ const char *color = PERF_COLOR_BLUE;
int i, j;
if (!dump_trace)
@@ -1348,7 +1350,7 @@ process_read_event(event_t *event, unsigned long offset, unsigned long head)
struct perf_counter_attr *attr = perf_header__find_attr(event->read.id);
if (show_threads) {
- char *name = attr ? __event_name(attr->type, attr->config)
+ const char *name = attr ? __event_name(attr->type, attr->config)
: "unknown";
perf_read_values_add_value(&show_threads_values,
event->read.pid, event->read.tid,
@@ -1411,19 +1413,19 @@ process_event(event_t *event, unsigned long offset, unsigned long head)
static u64 perf_header__sample_type(void)
{
- u64 sample_type = 0;
+ u64 type = 0;
int i;
for (i = 0; i < header->attrs; i++) {
struct perf_header_attr *attr = header->attr[i];
- if (!sample_type)
- sample_type = attr->attr.sample_type;
- else if (sample_type != attr->attr.sample_type)
+ if (!type)
+ type = attr->attr.sample_type;
+ else if (type != attr->attr.sample_type)
die("non matching sample_type");
}
- return sample_type;
+ return type;
}
static int __cmd_report(void)
@@ -1431,7 +1433,7 @@ static int __cmd_report(void)
int ret, rc = EXIT_FAILURE;
unsigned long offset = 0;
unsigned long head, shift;
- struct stat stat;
+ struct stat input_stat;
event_t *event;
uint32_t size;
char *buf;
@@ -1450,13 +1452,13 @@ static int __cmd_report(void)
exit(-1);
}
- ret = fstat(input, &stat);
+ ret = fstat(input, &input_stat);
if (ret < 0) {
perror("failed to stat file");
exit(-1);
}
- if (!stat.st_size) {
+ if (!input_stat.st_size) {
fprintf(stderr, "zero-sized file, nothing to do!\n");
exit(0);
}
@@ -1524,12 +1526,12 @@ more:
size = 8;
if (head + event->header.size >= page_size * mmap_window) {
- int ret;
+ int munmap_ret;
shift = page_size * (head / page_size);
- ret = munmap(buf, page_size * mmap_window);
- assert(ret == 0);
+ munmap_ret = munmap(buf, page_size * mmap_window);
+ assert(munmap_ret == 0);
offset += shift;
head -= shift;
@@ -1568,7 +1570,7 @@ more:
if (offset + head >= header->data_offset + header->data_size)
goto done;
- if (offset + head < (unsigned long)stat.st_size)
+ if (offset + head < (unsigned long)input_stat.st_size)
goto more;
done:
@@ -1666,7 +1668,7 @@ static const struct option options[] = {
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
- OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
+ OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"),
OPT_BOOLEAN('m', "modules", &modules,
"load module symbols - WARNING: use only with -k and LIVE kernel"),
OPT_BOOLEAN('n', "show-nr-samples", &show_nr_samples,