line-execution-checker
Check if specific lines were executed using gcov data
When & Why to Use This Skill
The Line Execution Checker is a specialized Claude skill designed to streamline code coverage analysis using gcov data. It enables developers to instantly verify whether specific lines of source code were executed during test runs, providing a lightweight and efficient alternative to generating full coverage reports. This tool is essential for C/C++ developers looking to ensure high-quality testing and precise code path validation.
Use Cases
- Unit Test Validation: Quickly confirm if specific logic branches, such as complex conditional statements or error-handling blocks, were actually triggered during a test run.
- Bug Fix Verification: Ensure that a newly implemented fix or a specific code path is exercised by the test suite to prevent regressions.
- Targeted Coverage Auditing: Check the execution status of critical lines in large codebases without the overhead of processing entire project coverage data.
- CI/CD Integration: Use as a gatekeeper in automated pipelines to fail builds if mandatory code paths (e.g., security checks) are not reached during testing.
| name | Line Execution Checker |
|---|---|
| description | Check if specific lines were executed using gcov data |
| version | 1.0 |
| author | Claude |
Line Execution Checker
Purpose
Fast tool to check if specific source lines were executed during test runs.
Tool: line-checker
Build
g++ -O3 -std=c++17 line_checker.cpp -o line-checker
Usage
# 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
- Verify
.gcdafiles exist:find . -name "*.gcda" -print -quit - Build tool if needed:
g++ -O3 -std=c++17 line_checker.cpp -o line-checker - Run:
./line-checker file.c:X - Report result to user
Example Interaction
User: "Was line 127 in parser.c executed?"
./line-checker parser.c:127
# Output: parser.c:127 EXECUTED (3 times)
Response: "Yes, line 127 was executed 3 times during testing."