# lbr\_save

### Function

> lbr\_save

### Syntax

> lbr\_save();

### Parameters

None

### Description

Saves the Last Branch Record (LBR) entries that were captured since the Last Branch Record was enabled using the '[!lbr](https://docs.hyperdbg.org/commands/extension-commands/lbr)' command. The entries are stored internally and can later be viewed using the '[!lbrdump](https://docs.hyperdbg.org/commands/extension-commands/lbrdump)' command. Unlike `lbr_print()`, this function does not display the entries immediately.

{% hint style="warning" %}
If `lbr_save()` is called more than once on the same core, the previously saved entries for that core are replaced with the new ones.
{% endhint %}

### Return value

None

### Examples

First, enable the LBR using the '[!lbr](https://docs.hyperdbg.org/commands/extension-commands/lbr)' command, then use `lbr_save()` in a script (e.g., inside an EPT hook), and finally disable the LBR.

```c
!lbr enable

!epthook 7ff7393a2fd7 pid 3274 script {
		lbr_save();
}

!lbr disable
```

The above example enables LBR, hooks the target address in process with PID **0x3274**, and each time execution reaches that address, the captured branch entries are saved. You can then use '[!lbrdump](https://docs.hyperdbg.org/commands/extension-commands/lbrdump)' to inspect them.

### Remarks

The support for this function is added from **v0.19**.

Before calling this function, you need to enable the Last Branch Record using the '[!lbr](https://docs.hyperdbg.org/commands/extension-commands/lbr)' command.

### Related

[lbr\_print](https://docs.hyperdbg.org/commands/scripting-language/functions/tracing/lbr_print)

[!lbr (enable, disable, and configure Last Branch Record)](https://docs.hyperdbg.org/commands/extension-commands/lbr)

[!lbrdump (dump Last Branch Record entries)](https://docs.hyperdbg.org/commands/extension-commands/lbrdump)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.hyperdbg.org/commands/scripting-language/functions/tracing/lbr_save.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.