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authorIngo Molnar <mingo@elte.hu>2009-08-15 12:26:57 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-16 10:47:47 +0200
commit83a0944fa919fb2ebcfc1f8933d86e437b597ca6 (patch)
tree814906744656554a1bc07cdad6b84b3581565358 /tools/perf/builtin-top.c
parent6baa0a5ae0954fb2486c480a20556a9f1aee0965 (diff)
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-top.c')
-rw-r--r--tools/perf/builtin-top.c23
1 files changed, 15 insertions, 8 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 9a6dbbff9a9..06f763e4b35 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -120,7 +120,8 @@ static void parse_source(struct sym_entry *syme)
struct module *module;
struct section *section = NULL;
FILE *file;
- char command[PATH_MAX*2], *path = vmlinux;
+ char command[PATH_MAX*2];
+ const char *path = vmlinux_name;
u64 start, end, len;
if (!syme)
@@ -487,10 +488,12 @@ static void print_sym_table(void)
);
for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
- struct sym_entry *syme = rb_entry(nd, struct sym_entry, rb_node);
- struct symbol *sym = (struct symbol *)(syme + 1);
+ struct symbol *sym;
double pcnt;
+ syme = rb_entry(nd, struct sym_entry, rb_node);
+ sym = (struct symbol *)(syme + 1);
+
if (++printed > print_entries || (int)syme->snap_count < count_filter)
continue;
@@ -609,7 +612,7 @@ static void print_mapped_keys(void)
fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter);
- if (vmlinux) {
+ if (vmlinux_name) {
fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
fprintf(stdout, "\t[S] stop annotation.\n");
@@ -638,7 +641,9 @@ static int key_mapped(int c)
case 'F':
case 's':
case 'S':
- return vmlinux ? 1 : 0;
+ return vmlinux_name ? 1 : 0;
+ default:
+ break;
}
return 0;
@@ -724,6 +729,8 @@ static void handle_keypress(int c)
case 'z':
zero = ~zero;
break;
+ default:
+ break;
}
}
@@ -812,13 +819,13 @@ static int parse_symbols(void)
{
struct rb_node *node;
struct symbol *sym;
- int modules = vmlinux ? 1 : 0;
+ int use_modules = vmlinux_name ? 1 : 0;
kernel_dso = dso__new("[kernel]", sizeof(struct sym_entry));
if (kernel_dso == NULL)
return -1;
- if (dso__load_kernel(kernel_dso, vmlinux, symbol_filter, verbose, modules) <= 0)
+ if (dso__load_kernel(kernel_dso, vmlinux_name, symbol_filter, verbose, use_modules) <= 0)
goto out_delete_dso;
node = rb_first(&kernel_dso->syms);
@@ -1114,7 +1121,7 @@ static const struct option options[] = {
"system-wide collection from all CPUs"),
OPT_INTEGER('C', "CPU", &profile_cpu,
"CPU to profile on"),
- OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
+ OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"),
OPT_INTEGER('m', "mmap-pages", &mmap_pages,
"number of mmap data pages"),
OPT_INTEGER('r', "realtime", &realtime_prio,