Merge "init: reboot to bootloader on crash for development builds"

# --

ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))

init_options += -DALLOW_LOCAL_PROP_OVERRIDE=1 -DALLOW_PERMISSIVE_SELINUX=1

init_options += \

    -DALLOW_LOCAL_PROP_OVERRIDE=1 \

    -DALLOW_PERMISSIVE_SELINUX=1 \

    -DREBOOT_BOOTLOADER_ON_PANIC=1

else

init_options += -DALLOW_LOCAL_PROP_OVERRIDE=0 -DALLOW_PERMISSIVE_SELINUX=0

init_options += \

    -DALLOW_LOCAL_PROP_OVERRIDE=0 \

    -DALLOW_PERMISSIVE_SELINUX=0 \

    -DREBOOT_BOOTLOADER_ON_PANIC=0

endif

init_options += -DLOG_UEVENTS=0

    return success;

}

static void install_reboot_signal_handlers() {

    // Instead of panic'ing the kernel as is the default behavior when init crashes,

    // we prefer to reboot to bootloader on development builds, as this will prevent

    // boot looping bad configurations and allow both developers and test farms to easily

    // recover.

    struct sigaction action;

    memset(&action, 0, sizeof(action));

    sigfillset(&action.sa_mask);

    action.sa_handler = [](int) {

        // panic() reboots to bootloader

        panic();

    };

    action.sa_flags = SA_RESTART;

    sigaction(SIGABRT, &action, nullptr);

    sigaction(SIGBUS, &action, nullptr);

    sigaction(SIGFPE, &action, nullptr);

    sigaction(SIGILL, &action, nullptr);

    sigaction(SIGSEGV, &action, nullptr);

#if defined(SIGSTKFLT)

    sigaction(SIGSTKFLT, &action, nullptr);

#endif

    sigaction(SIGSYS, &action, nullptr);

    sigaction(SIGTRAP, &action, nullptr);

}

int main(int argc, char** argv) {

    if (!strcmp(basename(argv[0]), "ueventd")) {

        return ueventd_main(argc, argv);

        return watchdogd_main(argc, argv);

    }

    if (REBOOT_BOOTLOADER_ON_PANIC) {

        install_reboot_signal_handlers();

    }

    add_environment("PATH", _PATH_DEFPATH);

    bool is_first_stage = (getenv("INIT_SECOND_STAGE") == nullptr);