Using a local variable to read all CPUSTAT options assumes that all of
them are in a single option section. While this is true for the current
trace file version format, this assumption limits the design of a more
flexible format with multiple options sections. Use input handler context
instead of the local variable.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
---
lib/trace-cmd/trace-input.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index ec4c6e55..b4af783b 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -132,6 +132,7 @@ struct tracecmd_input {
bool read_page;
bool use_pipe;
int file_version;
+ unsigned int cpustats_size;
struct cpu_data *cpu_data;
long long ts_offset;
struct tsc2nsec tsc_calc;
@@ -2658,7 +2659,6 @@ static int handle_options(struct tracecmd_input *handle)
unsigned short option;
unsigned int size;
char *cpustats = NULL;
- unsigned int cpustats_size = 0;
struct input_buffer_instance *buffer;
struct hook_list *hook;
char *buf;
@@ -2736,12 +2736,14 @@ static int handle_options(struct tracecmd_input *handle)
break;
case TRACECMD_OPTION_CPUSTAT:
buf[size-1] = '\n';
- cpustats = realloc(cpustats, cpustats_size + size + 1);
+ cpustats = realloc(handle->cpustats,
+ handle->cpustats_size + size + 1);
if (!cpustats)
return -ENOMEM;
- memcpy(cpustats + cpustats_size, buf, size);
- cpustats_size += size;
- cpustats[cpustats_size] = 0;
+ memcpy(cpustats + handle->cpustats_size, buf, size);
+ handle->cpustats_size += size;
+ cpustats[handle->cpustats_size] = 0;
+ handle->cpustats = cpustats;
break;
case TRACECMD_OPTION_BUFFER:
/* A buffer instance is saved at the end of the file */
@@ -2811,8 +2813,6 @@ static int handle_options(struct tracecmd_input *handle)
}
- handle->cpustats = cpustats;
-
return 0;
}
--
2.31.1
|