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perf tools: Get rid of malloc_or_die() in trace-event-read.c

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Check return value of malloc() and fail if error.  Now read_string()
can return NULL also check its return value and bail out.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1363850332-25297-7-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2013-03-21 16:18:49 +09:00 committed by Arnaldo Carvalho de Melo
parent 3dce2ce3cc
commit a4c983670e
1 changed files with 67 additions and 33 deletions
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98
tools/perf/util/trace-event-read.c
View File

@ -46,16 +46,6 @@ 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;
@ -156,48 +146,57 @@ static char *read_string(void)
if (calc_data_size)
calc_data_size += size;
str = malloc_or_die(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;
@ -222,65 +221,87 @@ 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)
@ -293,6 +314,7 @@ 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;
@ -310,6 +332,8 @@ 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);
@ -329,11 +353,21 @@ 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;