hardened_malloc/Android.bp

common_cflags = [
    "-pipe",
    "-O3",
    //"-flto",
    "-fPIC",
    "-fvisibility=hidden",
    //"-fno-plt",
    "-Wall",
    "-Wextra",
    "-Wcast-align",
    "-Wcast-qual",
    "-Wwrite-strings",
    "-Werror",
    "-DH_MALLOC_PREFIX",
    "-DZERO_ON_FREE=true",
    "-DWRITE_AFTER_FREE_CHECK=true",
    "-DSLOT_RANDOMIZE=true",
    "-DSLAB_CANARY=true",
    "-DSLAB_QUARANTINE_RANDOM_LENGTH=1",
    "-DSLAB_QUARANTINE_QUEUE_LENGTH=1",
    "-DCONFIG_EXTENDED_SIZE_CLASSES=true",
    "-DCONFIG_LARGE_SIZE_CLASSES=true",
    "-DGUARD_SLABS_INTERVAL=1",
    "-DGUARD_SIZE_DIVISOR=2",
    "-DREGION_QUARANTINE_RANDOM_LENGTH=256",
    "-DREGION_QUARANTINE_QUEUE_LENGTH=1024",
    "-DREGION_QUARANTINE_SKIP_THRESHOLD=33554432", // 32MiB
    "-DFREE_SLABS_QUARANTINE_RANDOM_LENGTH=32",
    "-DCONFIG_CLASS_REGION_SIZE=34359738368", // 32GiB
    "-DN_ARENA=1",
    "-DCONFIG_STATS=true",
    "-DCONFIG_SELF_INIT=false",
]

cc_defaults {
    name: "hardened_malloc_defaults",
    defaults: ["linux_bionic_supported"],
    cflags: common_cflags,
    conlyflags: ["-std=c17", "-Wmissing-prototypes"],
    stl: "none",
}

lib_src_files = [
    "chacha.c",
    "h_malloc.c",
    "memory.c",
    "pages.c",
    "random.c",
    "util.c",
]

cc_library {
    name: "libhardened_malloc",
    ramdisk_available: true,
    vendor_ramdisk_available: true,
    recovery_available: true,
    defaults: ["hardened_malloc_defaults"],
    srcs: lib_src_files,
    export_include_dirs: ["include"],
    static_libs: ["libasync_safe"],
    target: {
        android: {
            shared: {
                enabled: false,
            },
            system_shared_libs: [],
        },
        linux_bionic: {
            system_shared_libs: [],
        },
    },
    product_variables: {
        debuggable: {
            cflags: ["-DLABEL_MEMORY"],
        },
        device_has_arm_mte: {
            cflags: ["-DHAS_ARM_MTE", "-march=armv9-a+memtag"]
        },
    },
    apex_available: [
        "com.android.runtime",
    ],
}