CMakeLists.txt - mozsearch

# src/fuzzgen/tests/CMakeLists.txt

# Autotests for the crash-attribution feature (QtFuzzRuntime / crashdiag.h

# and its wiring into FuzzCppGenerator's templates). Three tiers, all wired

# via plain CTest so they run unmodified on macOS, Windows, and Linux:

#   Tier 1 (crashdiag_test):    zero Qt dependency. Directly exercises the

#                               real crash handler with a deliberate SIGSEGV

#                               / abort(), asserting the crash line names

#                               the right call. Always runs.

#   Tier 2 (codegen_selftest):  zero Qt dependency. Calls the real

#                               FuzzCppGenerator with hand-built method

#                               lists, asserting on the generated source

#                               text (array/case alignment, no leftover

#                               @@..@@ placeholders). Always runs.

#   Tier 2 (scanner_diff_selftest): zero Qt dependency. Calls the real

#                               classesDeclaredIn()/classesDefinedIn()

#                               (used by qtdiff) against hand-written

#                               header/source fixtures. Always runs.

#   Tier 3 (crashdiag_e2e):     requires Qt6::Core. Generates, compiles, and

#                               runs a real fuzz harness against a synthetic

#                               crashy class, end to end. Skipped when no

#                               Qt6 install is available.

# Tiers 1 and 3 deliberately crash by design — CTest treats a subprocess that

# dies from a signal/structured exception as an automatic failure regardless

# of PASS_REGULAR_EXPRESSION (confirmed empirically: that property only

# overrides an ordinary nonzero exit code, not signal termination). They are

# therefore run through run_and_check, which spawns the crashing program,

# captures its output, and itself always exits cleanly — see

# run_and_check.cpp for the full rationale.

# ── Shared subprocess-capture helper ──────────────────────────────────────────

add_executable(run_and_check run_and_check.cpp)

# ── Tier 1: crashdiag_test ────────────────────────────────────────────────────

add_executable(crashdiag_test crashdiag_test.cpp)

target_include_directories(crashdiag_test PRIVATE "${_FUZZGEN_INCLUDE_DIR}")

add_test(NAME crashdiag_segv

    COMMAND run_and_check "CRASHED.*FakeClass::crashyMethod" $<TARGET_FILE:crashdiag_test> segv

add_test(NAME crashdiag_abort

    COMMAND run_and_check "CRASHED.*FakeClass::crashyMethod" $<TARGET_FILE:crashdiag_test> abort

# ── Tier 2: codegen_selftest ──────────────────────────────────────────────────

add_executable(codegen_selftest codegen_selftest.cpp)

target_link_libraries(codegen_selftest PRIVATE QtFuzzLib)

add_test(NAME codegen_selftest COMMAND codegen_selftest)

add_executable(scanner_diff_selftest scanner_diff_selftest.cpp)

target_link_libraries(scanner_diff_selftest PRIVATE QtFuzzLib)

add_test(NAME scanner_diff_selftest COMMAND scanner_diff_selftest)

# ── Tier 3: end-to-end, only when Qt6::Core is available ─────────────────────

find_package(Qt6 COMPONENTS Core QUIET)

if(TARGET Qt6::Core)

    add_executable(gen_fixture gen_fixture.cpp)

    target_link_libraries(gen_fixture PRIVATE QtFuzzLib)

    set(_FIXTURE_CPP "${CMAKE_CURRENT_BINARY_DIR}/generated/fuzz_FakeClass.cpp")

    add_custom_command(

        OUTPUT  "${_FIXTURE_CPP}"

        COMMAND gen_fixture "${_FIXTURE_CPP}"

        DEPENDS gen_fixture

        COMMENT "Generating end-to-end crash-attribution fixture..."

        VERBATIM

    add_executable(crashdiag_e2e "${_FIXTURE_CPP}")

    target_include_directories(crashdiag_e2e PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/fixtures")

    target_link_libraries(crashdiag_e2e PRIVATE Qt6::Core)

    add_test(NAME crashdiag_e2e

        COMMAND run_and_check "CRASHED.*FakeClass::crashyMethod"

                $<TARGET_FILE:crashdiag_e2e> --seed 1 --time 5

    set_tests_properties(crashdiag_e2e PROPERTIES TIMEOUT 30)

else()

    message(STATUS "fuzzgen tests: Qt6::Core not found — skipping Tier 3 end-to-end crashdiag_e2e test.")

endif()