CMakeLists.txt - mozsearch

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# Copyright (C) 2026 The Qt Company Ltd.

# SPDX-License-Identifier: BSD-3-Clause

# tests/libfuzzer/CMakeLists.txt

# Builds and runs the hand-written libFuzzer targets below as part of the

# normal build/test run, alongside the qt_fuzzgen-generated tests in

# tests/fuzz.

# Every target here is a standalone CMake project (its own project() and

# find_package(Qt6 ...)) by design: that's what lets oss-fuzz, and the manual

# workflow in README, build each one independently against an already-built

# Qt. To keep that untouched, each target is configured and built here with

# ExternalProject_Add() against the Qt currently being built in this tree,

# instead of being folded in via add_subdirectory().

# Enabled by -DFEATURE_test_fuzz=ON during configure, and requires clang with

# -sanitize fuzzer-no-link (see README).

if(NOT (CLANG AND QT_FEATURE_sanitize_fuzzer_no_link))

    message(STATUS

        "tests/libfuzzer targets need clang with -sanitize fuzzer-no-link; skipping.")

    return()

endif()

if(NOT COMMAND ExternalProject_Add)

    include(ExternalProject)

endif()

_qt_internal_get_build_vars_for_external_projects(

    CMAKE_DIR_VAR _lf_qt_cmake_dir

    PREFIXES_VAR _lf_qt_prefixes

set(_lf_cmake_args "-DCMAKE_PREFIX_PATH:STRING=${_lf_qt_prefixes}")

if(QT_HOST_PATH OR CMAKE_CROSSCOMPILING)

    list(APPEND _lf_cmake_args

        "-DCMAKE_TOOLCHAIN_FILE:FILEPATH=${_lf_qt_cmake_dir}/qt.toolchain.cmake")

endif()

file(GLOB_RECURSE _lf_leaf_lists

    RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}"

    "${CMAKE_CURRENT_SOURCE_DIR}/*/CMakeLists.txt"

foreach(_lf_list IN LISTS _lf_leaf_lists)

    get_filename_component(_lf_dir "${_lf_list}" DIRECTORY)

    get_filename_component(_lf_target "${_lf_dir}" NAME)

    string(REPLACE "/" "_" _lf_name "qtbase_${_lf_dir}")

    file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/${_lf_list}" _lf_fp_line

        REGEX "find_package\\(Qt6 REQUIRED COMPONENTS")

    string(REGEX REPLACE ".*COMPONENTS[ \t]+([A-Za-z0-9 ]+)\\).*" "\\1"

        _lf_components "${_lf_fp_line}")

    separate_arguments(_lf_components)

    set(_lf_deps "")

    set(_lf_skip FALSE)

    foreach(_lf_component IN LISTS _lf_components)

        if(TARGET "Qt::${_lf_component}")

            list(APPEND _lf_deps "Qt::${_lf_component}")

        else()

            message(STATUS

                "tests/libfuzzer/${_lf_dir}: Qt::${_lf_component} is not available; skipping ${_lf_name}.")

            set(_lf_skip TRUE)

        endif()

    endforeach()

    if(_lf_skip)

        continue()

    endif()

    set(_lf_binary_dir "${CMAKE_CURRENT_BINARY_DIR}/${_lf_name}-build")

    ExternalProject_Add(${_lf_name}

        SOURCE_DIR      "${CMAKE_CURRENT_SOURCE_DIR}/${_lf_dir}"

        BINARY_DIR      "${_lf_binary_dir}"

        CMAKE_ARGS      ${_lf_cmake_args}

        INSTALL_COMMAND ""

        TEST_COMMAND    ""

        BUILD_ALWAYS    ON

        DEPENDS         ${_lf_deps}

    add_test(

        NAME ${_lf_name}

        COMMAND "${_lf_binary_dir}/${_lf_target}" -max_total_time=30

        WORKING_DIRECTORY "${_lf_binary_dir}"

    set_tests_properties(${_lf_name} PROPERTIES LABELS "fuzz;libfuzzer")

endforeach()

add_custom_target(tst_fuzz_libfuzzer_check

    COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -L libfuzzer