C++ (Cpp) perf_callchain_user Examples

Example #1

File: callchain.c Project: openube/android_kernel_sony_c2305

struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
{
	int rctx;
	struct perf_callchain_entry *entry;


	entry = get_callchain_entry(&rctx);
	if (rctx == -1)
		return NULL;

	if (!entry)
		goto exit_put;

	entry->nr = 0;

	if (!user_mode(regs)) {
		perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
		perf_callchain_kernel(entry, regs);
		if (current->mm)
			regs = task_pt_regs(current);
		else
			regs = NULL;
	}

	if (regs) {
		perf_callchain_store(entry, PERF_CONTEXT_USER);
		perf_callchain_user(entry, regs);
	}

exit_put:
	put_callchain_entry(rctx);

	return entry;
}

Example #2

File: callchain.c Project: mikuhatsune001/linux2.6.32

struct perf_callchain_entry *
perf_callchain(struct perf_event *event, struct pt_regs *regs)
{
	int rctx;
	struct perf_callchain_entry *entry;

	int kernel = !event->attr.exclude_callchain_kernel;
	int user   = !event->attr.exclude_callchain_user;

	if (!kernel && !user)
		return NULL;

	entry = get_callchain_entry(&rctx);
	if (rctx == -1)
		return NULL;

	if (!entry)
		goto exit_put;

	entry->nr = 0;

	if (kernel && !user_mode(regs)) {
		perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
		perf_callchain_kernel(entry, regs);
	}

	if (user) {
		if (!user_mode(regs)) {
			if  (current->mm)
				regs = task_pt_regs(current);
			else
				regs = NULL;
		}

		if (regs) {
			/*
			 * Disallow cross-task user callchains.
			 */
			if (event->ctx->task && event->ctx->task != current)
				goto exit_put;

			perf_callchain_store(entry, PERF_CONTEXT_USER);
			perf_callchain_user(entry, regs);
		}
	}

exit_put:
	put_callchain_entry(rctx);

	return entry;
}

Example #3

File: callchain.c Project: 513855417/linux

struct perf_callchain_entry *
get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
		   u32 max_stack, bool crosstask, bool add_mark)
{
	struct perf_callchain_entry *entry;
	struct perf_callchain_entry_ctx ctx;
	int rctx;

	entry = get_callchain_entry(&rctx);
	if (rctx == -1)
		return NULL;

	if (!entry)
		goto exit_put;

	ctx.entry     = entry;
	ctx.max_stack = max_stack;
	ctx.nr	      = entry->nr = init_nr;
	ctx.contexts       = 0;
	ctx.contexts_maxed = false;

	if (kernel && !user_mode(regs)) {
		if (add_mark)
			perf_callchain_store_context(&ctx, PERF_CONTEXT_KERNEL);
		perf_callchain_kernel(&ctx, regs);
	}

	if (user) {
		if (!user_mode(regs)) {
			if  (current->mm)
				regs = task_pt_regs(current);
			else
				regs = NULL;
		}

		if (regs) {
			if (crosstask)
				goto exit_put;

			if (add_mark)
				perf_callchain_store_context(&ctx, PERF_CONTEXT_USER);
			perf_callchain_user(&ctx, regs);
		}
	}

exit_put:
	put_callchain_entry(rctx);

	return entry;
}

Example #4

File: callchain.c Project: ertaoxu/linux

struct perf_callchain_entry *
get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
		   bool crosstask, bool add_mark)
{
	struct perf_callchain_entry *entry;
	int rctx;

	entry = get_callchain_entry(&rctx);
	if (rctx == -1)
		return NULL;

	if (!entry)
		goto exit_put;

	entry->nr = init_nr;

	if (kernel && !user_mode(regs)) {
		if (add_mark)
			perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
		perf_callchain_kernel(entry, regs);
	}

	if (user) {
		if (!user_mode(regs)) {
			if  (current->mm)
				regs = task_pt_regs(current);
			else
				regs = NULL;
		}

		if (regs) {
			if (crosstask)
				goto exit_put;

			if (add_mark)
				perf_callchain_store(entry, PERF_CONTEXT_USER);
			perf_callchain_user(entry, regs);
		}
	}

exit_put:
	put_callchain_entry(rctx);

	return entry;
}