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# This file introduces a templates for defining fuzzers.
#
# All parameters valid for executable() targets are valid (cflags, defines,
# deps, include_dirs, sources, ...). In addition to that:
#
# dummy_main (required)
# Path to a cpp file containing main(), used when neither
# llvm_use_sanitize_coverage nor llvm_use_sanitize_coverage are set.
#
# Example of usage:
#
# fuzzer("llvm-opt-fuzzer") {
# deps = [ ... ]
# dummy_main = "DummyOptFuzzer.cpp"
# sources = [ "llvm-opt-fuzzer.cpp" ]
# }
declare_args() {
# Set to the path of a static library containing a fuzzing engine, e.g.
# oss-fuzz's $LIB_FUZZING_ENGINE.
llvm_lib_fuzzing_engine = ""
# If true, pass -fsanitize=fuzzer to the compiler for fuzzer() targets.
# Likely only makes sense to set if you know that the host compiler is clang.
llvm_use_sanitize_coverage = false
}
template("fuzzer") {
assert(defined(invoker.dummy_main), "must set 'dummy_main' in $target_name")
assert(defined(invoker.sources), "must set 'sources' for $target_name")
executable(target_name) {
forward_variables_from(invoker, "*", [ "dummy_main" ])
if (llvm_lib_fuzzing_engine != "") {
if (!defined(libs)) {
libs = []
}
libs += [ llvm_lib_fuzzing_engine ]
not_needed(invoker, [ "dummy_main" ])
} else if (llvm_use_sanitize_coverage) {
if (!defined(cflags)) {
cflags = []
}
if (!defined(ldflags)) {
ldflags = []
}
cflags += [ "-fsanitize=fuzzer" ]
ldflags += [ "-fsanitize=fuzzer" ]
not_needed(invoker, [ "dummy_main" ])
} else {
sources += [ invoker.dummy_main ]
}
}
}
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