---
name: Line Execution Checker
description: Check if specific lines were executed using gcov data
version: 1.0
author: Claude
tags:
- coverage
- gcov
- testing
---
# Line Execution Checker
## Purpose
Fast tool to check if specific source lines were executed during test runs.
## Tool: line-checker
### Build
```bash
g++ -O3 -std=c++17 line_checker.cpp -o line-checker
```
### Usage
```bash
# Single line
./line-checker file.c:42
# Multiple lines
./line-checker file.c:42 main.c:100 util.c:55
```
### Output
```
file.c:42 EXECUTED (5 times)
main.c:100 NOT EXECUTED
util.c:55 EXECUTED (12 times)
```
### Exit Codes
- 0: All lines executed
- 1: One or more lines NOT executed
- 2: Error
## Prerequisites
Coverage data must exist from prior test run with `--coverage` flag.
## When User Asks
"Was line X of file.c executed?" or "Check if these lines were covered"
### Steps
1. Verify `.gcda` files exist: `find . -name "*.gcda" -print -quit`
2. Build tool if needed: `g++ -O3 -std=c++17 line_checker.cpp -o line-checker`
3. Run: `./line-checker file.c:X`
4. Report result to user
## Example Interaction
User: "Was line 127 in parser.c executed?"
```bash
./line-checker parser.c:127
# Output: parser.c:127 EXECUTED (3 times)
```
Response: "Yes, line 127 was executed 3 times during testing."
