Coverage Report

Created: 2026-09-01 06:47

next uncovered line (L), next uncovered region (R), next uncovered branch (B)
/src/immer/extra/fuzzer/fuzzer_input.hpp
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Count
Source
1
//
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// immer: immutable data structures for C++
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// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
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//
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// This software is distributed under the Boost Software License, Version 1.0.
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// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
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//
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#pragma once
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#include <cstdint>
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#include <memory>
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#include <stdexcept>
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#if defined(__GNUC__) && (__GNUC__ == 9 || __GNUC__ == 8 || __GNUC__ == 10)
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#define IMMER_DISABLE_FUZZER_DUE_TO_GCC_BUG 1
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#endif
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struct no_more_input : std::exception
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{};
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constexpr auto fuzzer_input_max_size = 1 << 16;
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struct fuzzer_input
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{
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    const std::uint8_t* data_;
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    std::size_t size_;
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    const std::uint8_t* next(std::size_t size)
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7.80M
    {
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7.80M
        if (size_ < size)
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0
            throw no_more_input{};
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7.80M
        auto r = data_;
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7.80M
        data_ += size;
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7.80M
        size_ -= size;
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7.80M
        return r;
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7.80M
    }
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    const std::uint8_t* next(std::size_t size, std::size_t align)
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7.81M
    {
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7.81M
        auto& p = const_cast<void*&>(reinterpret_cast<const void*&>(data_));
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7.81M
        auto r  = std::align(align, size, p, size_);
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7.81M
        if (r == nullptr)
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8.60k
            throw no_more_input{};
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7.80M
        return next(size);
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7.81M
    }
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    template <typename Fn>
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    int run(Fn step)
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8.61k
    {
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8.61k
        if (size_ > fuzzer_input_max_size)
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8
            return 0;
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8.60k
        try {
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1.94M
            while (step(*this))
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1.94M
                continue;
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8.60k
        } catch (const no_more_input&) {
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8.60k
        };
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8.60k
        return 0;
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8.60k
    }
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};
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template <typename T>
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const T& read(fuzzer_input& fz)
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7.81M
{
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7.81M
    return *reinterpret_cast<const T*>(fz.next(sizeof(T), alignof(T)));
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7.81M
}
char const& read<char>(fuzzer_input&)
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Source
64
7.35M
{
65
7.35M
    return *reinterpret_cast<const T*>(fz.next(sizeof(T), alignof(T)));
66
7.35M
}
unsigned char const& read<unsigned char>(fuzzer_input&)
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Count
Source
64
465k
{
65
465k
    return *reinterpret_cast<const T*>(fz.next(sizeof(T), alignof(T)));
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465k
}
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template <typename T, typename Cond>
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T read(fuzzer_input& fz, Cond cond)
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5.31M
{
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5.31M
    auto x = read<T>(fz);
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5.87M
    while (!cond(x))
73
564k
        x = read<T>(fz);
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5.31M
    return x;
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5.31M
}
flex-vector.cpp:char read<char, LLVMFuzzerTestOneInput::$_0>(fuzzer_input&, LLVMFuzzerTestOneInput::$_0)
Line
Count
Source
70
4.74M
{
71
4.74M
    auto x = read<T>(fz);
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5.09M
    while (!cond(x))
73
350k
        x = read<T>(fz);
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4.74M
    return x;
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4.74M
}
flex-vector.cpp:unsigned char read<unsigned char, LLVMFuzzerTestOneInput::$_2::operator()<immer::flex_vector<int, immer::memory_policy<immer::free_list_heap_policy<immer::cpp_heap, 1024ul>, immer::refcount_policy, immer::spinlock_policy, immer::no_transience_policy, false, true>, 2u, 2u> >(immer::flex_vector<int, immer::memory_policy<immer::free_list_heap_policy<immer::cpp_heap, 1024ul>, immer::refcount_policy, immer::spinlock_policy, immer::no_transience_policy, false, true>, 2u, 2u>&) const::{lambda(auto:1)#1}>(fuzzer_input&, LLVMFuzzerTestOneInput::$_2::operator()<immer::flex_vector<int, immer::memory_policy<immer::free_list_heap_policy<immer::cpp_heap, 1024ul>, immer::refcount_policy, immer::spinlock_policy, immer::no_transience_policy, false, true>, 2u, 2u> >(immer::flex_vector<int, immer::memory_policy<immer::free_list_heap_policy<immer::cpp_heap, 1024ul>, immer::refcount_policy, immer::spinlock_policy, immer::no_transience_policy, false, true>, 2u, 2u>&) const::{lambda(auto:1)#1})
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Source
70
190k
{
71
190k
    auto x = read<T>(fz);
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345k
    while (!cond(x))
73
154k
        x = read<T>(fz);
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190k
    return x;
75
190k
}
flex-vector.cpp:unsigned char read<unsigned char, LLVMFuzzerTestOneInput::$_3::operator()<immer::flex_vector<int, immer::memory_policy<immer::free_list_heap_policy<immer::cpp_heap, 1024ul>, immer::refcount_policy, immer::spinlock_policy, immer::no_transience_policy, false, true>, 2u, 2u> >(immer::flex_vector<int, immer::memory_policy<immer::free_list_heap_policy<immer::cpp_heap, 1024ul>, immer::refcount_policy, immer::spinlock_policy, immer::no_transience_policy, false, true>, 2u, 2u>&) const::{lambda(auto:1)#1}>(fuzzer_input&, LLVMFuzzerTestOneInput::$_3::operator()<immer::flex_vector<int, immer::memory_policy<immer::free_list_heap_policy<immer::cpp_heap, 1024ul>, immer::refcount_policy, immer::spinlock_policy, immer::no_transience_policy, false, true>, 2u, 2u> >(immer::flex_vector<int, immer::memory_policy<immer::free_list_heap_policy<immer::cpp_heap, 1024ul>, immer::refcount_policy, immer::spinlock_policy, immer::no_transience_policy, false, true>, 2u, 2u>&) const::{lambda(auto:1)#1})
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Source
70
107k
{
71
107k
    auto x = read<T>(fz);
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120k
    while (!cond(x))
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12.7k
        x = read<T>(fz);
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107k
    return x;
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107k
}
flex-vector.cpp:char read<char, LLVMFuzzerTestOneInput::$_1::operator()<char>(char) const::{lambda(auto:1)#1}>(fuzzer_input&, LLVMFuzzerTestOneInput::$_1::operator()<char>(char) const::{lambda(auto:1)#1})
Line
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Source
70
263k
{
71
263k
    auto x = read<T>(fz);
72
310k
    while (!cond(x))
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47.3k
        x = read<T>(fz);
74
263k
    return x;
75
263k
}