C++ (Cpp) ftrace_trace_onoff_unreg示例

示例#1

文件： trace_functions.c 项目： ARMWorks/FA_2451_Linux_Kernel

static int
ftrace_trace_onoff_callback(struct ftrace_hash *hash,
			    char *glob, char *cmd, char *param, int enable)
{
	struct ftrace_probe_ops *ops;
	void *count = (void *)-1;
	char *number;
	int ret;

	/* hash funcs only work with set_ftrace_filter */
	if (!enable)
		return -EINVAL;

	if (glob[0] == '!')
		return ftrace_trace_onoff_unreg(glob+1, cmd, param);

	/* we register both traceon and traceoff to this callback */
	if (strcmp(cmd, "traceon") == 0)
		ops = &traceon_probe_ops;
	else
		ops = &traceoff_probe_ops;

	if (!param)
		goto out_reg;

	number = strsep(&param, ":");

	if (!strlen(number))
		goto out_reg;

	/*
	 * We use the callback data field (which is a pointer)
	 * as our counter.
	 */
	ret = strict_strtoul(number, 0, (unsigned long *)&count);
	if (ret)
		return ret;

 out_reg:
	ret = register_ftrace_function_probe(glob, ops, count);

	return ret < 0 ? ret : 0;
}

示例#2

static int
ftrace_trace_onoff_callback(char *glob, char *cmd, char *param, int enable)
{
	struct ftrace_probe_ops *ops;
	void *count = (void *)-1;
	char *number;
	int ret;

	
	if (!enable)
		return -EINVAL;

	if (glob[0] == '!')
		return ftrace_trace_onoff_unreg(glob+1, cmd, param);

	
	if (strcmp(cmd, "traceon") == 0)
		ops = &traceon_probe_ops;
	else
		ops = &traceoff_probe_ops;

	if (!param)
		goto out_reg;

	number = strsep(&param, ":");

	if (!strlen(number))
		goto out_reg;

	
	ret = strict_strtoul(number, 0, (unsigned long *)&count);
	if (ret)
		return ret;

 out_reg:
	ret = register_ftrace_function_probe(glob, ops, count);

	return ret < 0 ? ret : 0;
}