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Message-Id: <1363850332-25297-7-git-send-email-namhyung@kernel.org>
Date: Thu, 21 Mar 2013 16:18:49 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Paul Mackerras <paulus@...ba.org>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung.kim@....com>,
LKML <linux-kernel@...r.kernel.org>,
Steven Rostedt <rostedt@...dmis.org>,
Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH 6/9] perf util: Get rid of malloc_or_die() in trace-event-read.c
From: Namhyung Kim <namhyung.kim@....com>
Check return value of malloc() and fail if error. Now read_string()
can return NULL also check its return value and bail out.
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/perf/util/trace-event-read.c | 100 +++++++++++++++++++++++++------------
1 file changed, 67 insertions(+), 33 deletions(-)
diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 9bf64986a968..dc599fd27c47 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -48,16 +48,6 @@ static int long_size;
static ssize_t calc_data_size;
static bool repipe;
-static void *malloc_or_die(int size)
-{
- void *ret;
-
- ret = malloc(size);
- if (!ret)
- die("malloc");
- return ret;
-}
-
static int do_read(int fd, void *buf, int size)
{
int rsize = size;
@@ -158,48 +148,57 @@ static char *read_string(void)
if (calc_data_size)
calc_data_size += size;
- str = malloc_or_die(size);
- memcpy(str, buf, size);
+ str = malloc(size);
+ if (str)
+ memcpy(str, buf, size);
return str;
}
-static void read_proc_kallsyms(struct pevent *pevent)
+static int read_proc_kallsyms(struct pevent *pevent)
{
unsigned int size;
char *buf;
size = read4(pevent);
if (!size)
- return;
+ return 0;
+
+ buf = malloc(size + 1);
+ if (buf == NULL)
+ return -1;
- buf = malloc_or_die(size + 1);
read_or_die(buf, size);
buf[size] = '\0';
parse_proc_kallsyms(pevent, buf, size);
free(buf);
+ return 0;
}
-static void read_ftrace_printk(struct pevent *pevent)
+static int read_ftrace_printk(struct pevent *pevent)
{
unsigned int size;
char *buf;
size = read4(pevent);
if (!size)
- return;
+ return 0;
+
+ buf = malloc(size);
+ if (buf == NULL)
+ return -1;
- buf = malloc_or_die(size);
read_or_die(buf, size);
parse_ftrace_printk(pevent, buf, size);
free(buf);
+ return 0;
}
-static void read_header_files(struct pevent *pevent)
+static int read_header_files(struct pevent *pevent)
{
unsigned long long size;
char *header_event;
@@ -224,65 +223,87 @@ static void read_header_files(struct pevent *pevent)
die("did not read header event");
size = read8(pevent);
- header_event = malloc_or_die(size);
+ header_event = malloc(size);
+ if (header_event == NULL)
+ return -1;
+
read_or_die(header_event, size);
free(header_event);
+ return 0;
}
-static void read_ftrace_file(struct pevent *pevent, unsigned long long size)
+static int read_ftrace_file(struct pevent *pevent, unsigned long long size)
{
char *buf;
- buf = malloc_or_die(size);
+ buf = malloc(size);
+ if (buf == NULL)
+ return -1;
+
read_or_die(buf, size);
parse_ftrace_file(pevent, buf, size);
free(buf);
+ return 0;
}
-static void read_event_file(struct pevent *pevent, char *sys,
+static int read_event_file(struct pevent *pevent, char *sys,
unsigned long long size)
{
char *buf;
- buf = malloc_or_die(size);
+ buf = malloc(size);
+ if (buf == NULL)
+ return -1;
+
read_or_die(buf, size);
parse_event_file(pevent, buf, size, sys);
free(buf);
+ return 0;
}
-static void read_ftrace_files(struct pevent *pevent)
+static int read_ftrace_files(struct pevent *pevent)
{
unsigned long long size;
int count;
int i;
+ int ret;
count = read4(pevent);
for (i = 0; i < count; i++) {
size = read8(pevent);
- read_ftrace_file(pevent, size);
+ ret = read_ftrace_file(pevent, size);
+ if (ret)
+ return ret;
}
+ return 0;
}
-static void read_event_files(struct pevent *pevent)
+static int read_event_files(struct pevent *pevent)
{
unsigned long long size;
char *sys;
int systems;
int count;
int i,x;
+ int ret;
systems = read4(pevent);
for (i = 0; i < systems; i++) {
sys = read_string();
+ if (sys == NULL)
+ return -1;
count = read4(pevent);
for (x=0; x < count; x++) {
size = read8(pevent);
- read_event_file(pevent, sys, size);
+ ret = read_event_file(pevent, sys, size);
+ if (ret)
+ return ret;
}
}
+ return 0;
}
ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
@@ -295,6 +316,7 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
int show_printk = 0;
ssize_t size = -1;
struct pevent *pevent;
+ int err;
*ppevent = NULL;
@@ -312,6 +334,8 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
die("not a trace file (missing 'tracing' tag)");
version = read_string();
+ if (version == NULL)
+ return -1;
if (show_version)
printf("version = %s\n", version);
free(version);
@@ -331,11 +355,21 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
page_size = read4(pevent);
- read_header_files(pevent);
- read_ftrace_files(pevent);
- read_event_files(pevent);
- read_proc_kallsyms(pevent);
- read_ftrace_printk(pevent);
+ err = read_header_files(pevent);
+ if (err)
+ goto out;
+ err = read_ftrace_files(pevent);
+ if (err)
+ goto out;
+ err = read_event_files(pevent);
+ if (err)
+ goto out;
+ err = read_proc_kallsyms(pevent);
+ if (err)
+ goto out;
+ err = read_ftrace_printk(pevent);
+ if (err)
+ goto out;
size = calc_data_size - 1;
calc_data_size = 0;
--
1.7.11.7
--
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