[#3731] Fix fuzzing stalling because it cannot find inputs

Also install fuzzers which will be required for CI

fuzz/main.cc

@@ -1,4 +1,4 @@
-// Copyright (C) 2024 Internet Systems Consortium, Inc. ("ISC")
+// Copyright (C) 2024-2025 Internet Systems Consortium, Inc. ("ISC")
 //
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -36,7 +36,12 @@ main(int, char* argv[]) {
 
     // Determine some paths.
     Path const this_binary(argv[0]);
-    string const ancestor_path(Path(this_binary.parentPath()).parentPath());
+    string ancestor_path(this_binary.parentPath());
+    // TODO: remove kludgy if-condition when autotools gets removed.
+    if (Path(ancestor_path).filename() == ".libs") {
+        ancestor_path = Path(ancestor_path).parentPath();
+    }
+    cout << ancestor_path << endl;
     string const filename(this_binary.filename());
     stringstream ss;
     ss << ancestor_path << "/input/" << filename;

fuzz/meson.build

@@ -2,7 +2,34 @@ if not FUZZ_OPT.enabled()
     subdir_done()
 endif
 
-subdir('tests')
+current_source_dir = meson.current_source_dir()
+list = []
+foreach i : [
+    'fuzz_config_kea_dhcp4',
+    'fuzz_config_kea_dhcp6',
+    'fuzz_http_endpoint_kea_dhcp4',
+    'fuzz_http_endpoint_kea_dhcp6',
+    'fuzz_packets_kea_dhcp4',
+    'fuzz_packets_kea_dhcp6',
+    'fuzz_unix_socket_kea_dhcp4',
+    'fuzz_unix_socket_kea_dhcp6',
+    'fuzz_config_kea_dhcp4/doc-examples',
+    'fuzz_config_kea_dhcp6/doc-examples',
+
+]
+    command = run_command(
+        GRABBER,
+        f'input/@i@',
+        '*',
+        check: true,
+    )
+    foreach j : command.stdout().strip().split('\n')
+        # configure_file doesn't work with path segments in the output, so let
+        # us simulate it with commands.
+        run_command([f'mkdir', '-p', f'@TOP_BUILD_DIR@/fuzz/input/@i@'], check: true)
+        run_command([f'cp', f'input/@i@/@j@', f'@TOP_BUILD_DIR@/fuzz/input/@i@/@j@'], check: true)
+    endforeach
+endforeach
 
 fuzz_sources = ['fuzz.cc', 'fuzz.h']
 cpp_flags = [
@@ -10,7 +37,7 @@ cpp_flags = [
     f'-DKEA_LFC_SOURCES="@KEA_LFC_BUILT@"',
 ]
 if FUZZING_WITH_CLUSTERFUZZLITE
-    cpp_flags = ['-fsanitize=fuzzer', '-gdwarf-4']
+    cpp_flags += ['-fsanitize=fuzzer', '-gdwarf-4']
 else
     fuzz_sources += ['main.cc']
 endif
@@ -34,6 +61,8 @@ executable(
     dependencies: [CRYPTO_DEP, GTEST_DEP],
     include_directories: includes,
     link_with: [dhcp4_lib, fuzz_lib] + LIBS_BUILT_SO_FAR,
+    install: true,
+    install_dir: SBINDIR,
 )
 
 executable(
@@ -44,6 +73,8 @@ executable(
     dependencies: [CRYPTO_DEP, GTEST_DEP],
     include_directories: includes,
     link_with: [dhcp6_lib, fuzz_lib] + LIBS_BUILT_SO_FAR,
+    install: true,
+    install_dir: SBINDIR,
 )
 
 executable(
@@ -54,6 +85,8 @@ executable(
     dependencies: [CRYPTO_DEP, GTEST_DEP],
     include_directories: includes,
     link_with: [dhcp4_lib, fuzz_lib] + LIBS_BUILT_SO_FAR,
+    install: true,
+    install_dir: SBINDIR,
 )
 
 executable(
@@ -64,6 +97,8 @@ executable(
     dependencies: [CRYPTO_DEP, GTEST_DEP],
     include_directories: includes,
     link_with: [dhcp6_lib, fuzz_lib] + LIBS_BUILT_SO_FAR,
+    install: true,
+    install_dir: SBINDIR,
 )
 
 executable(
@@ -74,6 +109,8 @@ executable(
     dependencies: [CRYPTO_DEP, GTEST_DEP],
     include_directories: includes,
     link_with: [dhcp4_lib, kea_dhcpsrv_lib, fuzz_lib] + LIBS_BUILT_SO_FAR,
+    install: true,
+    install_dir: SBINDIR,
 )
 
 executable(
@@ -84,6 +121,8 @@ executable(
     dependencies: [CRYPTO_DEP, GTEST_DEP],
     include_directories: includes,
     link_with: [dhcp6_lib, kea_dhcpsrv_lib, fuzz_lib] + LIBS_BUILT_SO_FAR,
+    install: true,
+    install_dir: SBINDIR,
 )
 
 executable(
@@ -94,6 +133,8 @@ executable(
     dependencies: [CRYPTO_DEP, GTEST_DEP],
     include_directories: includes,
     link_with: [dhcp4_lib, kea_testutils_lib, fuzz_lib] + LIBS_BUILT_SO_FAR,
+    install: true,
+    install_dir: SBINDIR,
 )
 
 executable(
@@ -104,4 +145,8 @@ executable(
     dependencies: [CRYPTO_DEP, GTEST_DEP],
     include_directories: includes,
     link_with: [dhcp6_lib, kea_testutils_lib, fuzz_lib] + LIBS_BUILT_SO_FAR,
+    install: true,
+    install_dir: SBINDIR,
 )
+
+subdir('tests')

fuzz/tests/meson.build

@@ -1,13 +1,13 @@
-foreach i : [
+current_source_dir = meson.current_source_dir()
-    'test_fuzz_http_endpoint_kea_dhcp4.sh',
+fuzz_test_scripts = run_command(
-    'test_fuzz_packets_kea_dhcp6.sh',
+    GRABBER,
-    'test_fuzz_config_kea_dhcp4.sh',
+    current_source_dir,
-    'test_fuzz_packets_kea_dhcp4.sh',
+    'test_fuzz_*.sh',
-    'test_fuzz_unix_socket_kea_dhcp6.sh',
+    check: true,
-    'test_fuzz_config_kea_dhcp6.sh',
+)
-    'test_fuzz_unix_socket_kea_dhcp4.sh',
+fuzz_test_scripts = fuzz_test_scripts.stdout().strip().split('\n')
-    'test_fuzz_http_endpoint_kea_dhcp6.sh',
+
-]
+foreach st : fuzz_test_scripts
-    t = configure_file(input: i, output: i, copy: true)
+    bt = configure_file(input: st, output: st, copy: true)
-    test(i, t)
+    test(st, bt)
 endforeach