/src/cpython/Python/python_coverage.h

Source (jump to first uncovered line)
#pragma once
#include <stddef.h>

#define COVERAGE_ARRAY_SIZE 65536

__attribute__((section("__libfuzzer_extra_counters")))
unsigned char coverage_counter[COVERAGE_ARRAY_SIZE];

void fuzzer_record_code_coverage(void* codeptr, int lasti)
{
    coverage_counter[ ((size_t)(codeptr) ^ (size_t)(lasti)) % COVERAGE_ARRAY_SIZE ] = 1;
}

Coverage Report

Created: 2025-07-04 06:49

Line	Count	Source (jump to first uncovered line)
1		#pragma once
2		#include <stddef.h>
3
4	0	#define COVERAGE_ARRAY_SIZE 65536
5
6		__attribute__((section("__libfuzzer_extra_counters")))
7		unsigned char coverage_counter[COVERAGE_ARRAY_SIZE];
8
9		void fuzzer_record_code_coverage(void* codeptr, int lasti)
10	0	{
11	0	coverage_counter[ ((size_t)(codeptr) ^ (size_t)(lasti)) % COVERAGE_ARRAY_SIZE ] = 1;
12	0	}