Messages in this thread Patch in this message | | | Date | Wed, 20 May 2015 15:07:39 +0200 | From | Martin Liška <> | Subject | Re: [PATCH] perf: fix wrong DEBUG configuration |
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On 05/19/2015 04:04 PM, Arnaldo Carvalho de Melo wrote: > Em Tue, May 19, 2015 at 03:41:03PM +0200, Martin Liška escreveu: >> Following patch is fix for wrong DEBUG configuration. > > Can you please state, in the changelog, what you think is wrong and how > your proposed change fixes it, so that after reading your intent I can > go and look at the code to see if it matches that? > > - Arnaldo > >> Signed-off-by: Martin Liska <mliska@suse.cz> >> --- >> tools/perf/arch/common.c | 2 +- >> tools/perf/config/Makefile | 2 +- >> tools/perf/util/symbol.c | 2 +- >> tools/perf/util/trace-event-parse.c | 2 +- >> 4 files changed, 4 insertions(+), 4 deletions(-) >> >> diff --git a/tools/perf/arch/common.c b/tools/perf/arch/common.c >> index 49776f1..b7bb42c 100644 >> --- a/tools/perf/arch/common.c >> +++ b/tools/perf/arch/common.c >> @@ -61,7 +61,7 @@ const char *const mips_triplets[] = { >> static bool lookup_path(char *name) >> { >> bool found = false; >> - char *path, *tmp; >> + char *path, *tmp = NULL; >> char buf[PATH_MAX]; >> char *env = getenv("PATH"); >> diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile >> index 59a98c6..b708ae0 100644 >> --- a/tools/perf/config/Makefile >> +++ b/tools/perf/config/Makefile >> @@ -129,7 +129,7 @@ ifndef DEBUG >> endif >> ifeq ($(DEBUG),0) >> - CFLAGS += -O6 >> + CFLAGS += -Og >> endif >> ifdef PARSER_DEBUG >> diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c >> index 201f6c4c..29792d2 100644 >> --- a/tools/perf/util/symbol.c >> +++ b/tools/perf/util/symbol.c >> @@ -397,7 +397,7 @@ static struct symbol *symbols__find_by_name(struct rb_root *symbols, >> const char *name) >> { >> struct rb_node *n; >> - struct symbol_name_rb_node *s; >> + struct symbol_name_rb_node *s = NULL; >> if (symbols == NULL) >> return NULL; >> diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c >> index 25d6c73..d495741 100644 >> --- a/tools/perf/util/trace-event-parse.c >> +++ b/tools/perf/util/trace-event-parse.c >> @@ -173,7 +173,7 @@ void parse_ftrace_printk(struct pevent *pevent, >> char *line; >> char *next = NULL; >> char *addr_str; >> - char *fmt; >> + char *fmt = NULL; >> line = strtok_r(file, "\n", &next); >> while (line) { >> -- >> 2.1.4
Currently, GCC optimizes -O6 same as -O3 level. Right optimize debugging experience is given by passing -Og to compiler. Assign default value for pointers that are identified by compiler as non-initialized.
Signed-off-by: Martin Liska <mliska@suse.cz> From b5f2b42b279ab497e92d41e1f4021dd5cb6ae3ce Mon Sep 17 00:00:00 2001 From: mliska <mliska@suse.cz> Date: Thu, 2 Apr 2015 15:24:49 +0200 Subject: [PATCH] perf: fix wrong DEBUG configuration
Currently, GCC optimizes -O6 same as -O3 level. Right optimize debugging experience is given by passing -Og to compiler. Assign default value for pointers that are identified by compiler as non-initialized.
Signed-off-by: Martin Liska <mliska@suse.cz> --- tools/perf/arch/common.c | 2 +- tools/perf/config/Makefile | 2 +- tools/perf/util/symbol.c | 2 +- tools/perf/util/trace-event-parse.c | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/tools/perf/arch/common.c b/tools/perf/arch/common.c index 49776f1..b7bb42c 100644 --- a/tools/perf/arch/common.c +++ b/tools/perf/arch/common.c @@ -61,7 +61,7 @@ const char *const mips_triplets[] = { static bool lookup_path(char *name) { bool found = false; - char *path, *tmp; + char *path, *tmp = NULL; char buf[PATH_MAX]; char *env = getenv("PATH"); diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index e3b3724..ca8d3e3 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -129,7 +129,7 @@ ifndef DEBUG endif ifeq ($(DEBUG),0) - CFLAGS += -O6 + CFLAGS += -Og endif ifdef PARSER_DEBUG diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 82a31fd..a19fbd4 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -400,7 +400,7 @@ static struct symbol *symbols__find_by_name(struct rb_root *symbols, const char *name) { struct rb_node *n; - struct symbol_name_rb_node *s; + struct symbol_name_rb_node *s = NULL; if (symbols == NULL) return NULL; diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c index 25d6c73..d495741 100644 --- a/tools/perf/util/trace-event-parse.c +++ b/tools/perf/util/trace-event-parse.c @@ -173,7 +173,7 @@ void parse_ftrace_printk(struct pevent *pevent, char *line; char *next = NULL; char *addr_str; - char *fmt; + char *fmt = NULL; line = strtok_r(file, "\n", &next); while (line) { -- 2.1.4
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