C++ (Cpp) si_fill_from_registers Examples

Example #1

// exception catch support for JVMTI, also restore stack after Stack Overflow Error
void jvmti_exception_catch_callback() {
    Registers regs = {0};
    VM_thread *thread = p_TLS_vmthread;
    assert(thread);

    if (thread->regs) {
        regs = *(Registers*)thread->regs;
    }

    M2nFrame* m2n = (M2nFrame *) STD_ALLOCA(m2n_get_size());
    m2n_push_suspended_frame(thread, m2n, &regs);
    M2nFrame* prev_m2n = m2n_get_previous_frame(m2n);

    StackIterator* si = (StackIterator*) STD_ALLOCA(si_size());
    si_fill_from_registers(si, &regs, false, prev_m2n);

    // si_create_from_registers uses large stack space,
    // so guard page restored after its invoke, 
    // but befor ti agent callback invokation, 
    // because it should work on protected page.
    if (p_TLS_vmthread->restore_guard_page) {
        int res = port_thread_restore_guard_page();

        if (res != 0) {
            Global_Env *env = VM_Global_State::loader_env;

            if (si_is_native(si)) {
                m2n_set_last_frame(prev_m2n);

                if ((interpreter_enabled() || (!prev_m2n) ||
                        (m2n_get_frame_type(prev_m2n) & FRAME_NON_UNWINDABLE))) {
                    exn_raise_by_class(env->java_lang_StackOverflowError_Class);
                } else {
                    //si_free(si);
                    exn_throw_by_class(env->java_lang_StackOverflowError_Class);
                }
            } else {
                //si_free(si);
                exn_throw_by_class(env->java_lang_StackOverflowError_Class);
            }
        }

        p_TLS_vmthread->restore_guard_page = false;
    }

    if (!si_is_native(si))
    {
        CodeChunkInfo* catch_cci = si_get_code_chunk_info(si);
        assert(catch_cci);
        Method* catch_method = catch_cci->get_method();
        NativeCodePtr catch_method_location = si_get_ip(si);
        JIT* catch_method_jit = catch_cci->get_jit();
        ManagedObject** exn_obj = (ManagedObject**) si_get_return_pointer(si);
        *exn_obj = jvmti_jit_exception_catch_event_callback_call( *exn_obj,
                catch_method_jit, catch_method, catch_method_location);
    }

    si_transfer_control(si);
}

Example #2

File: stack_iterator_em64t.cpp Project: unitedroad/harmony-for-haiku

StackIterator * si_create_from_registers(Registers * regs, bool is_ip_past,
                                        M2nFrame * lm2nf) {
    ASSERT_NO_INTERPRETER
    // Allocate iterator
    StackIterator * si = (StackIterator *)STD_MALLOC(sizeof(StackIterator));
    assert(si);
    
    si_fill_from_registers(si, regs, is_ip_past, lm2nf);

    return si;
}

Example #3

// exception catch callback to restore stack after Stack Overflow Error
void exception_catch_callback() {
    Registers regs = {0};
    VM_thread *thread = p_TLS_vmthread;
    assert(thread);

    if (thread->regs) {
        regs = *(Registers*)thread->regs;
    }

    M2nFrame* m2n = (M2nFrame *) STD_ALLOCA(m2n_get_size());
    m2n_push_suspended_frame(thread, m2n, &regs);
    M2nFrame* prev_m2n = m2n_get_previous_frame(m2n);

    StackIterator* si = (StackIterator*) STD_ALLOCA(si_size());
    si_fill_from_registers(si, &regs, false, prev_m2n);

    // si_create_from_registers uses large stack space,
    // so guard page restored after its invoke.
    if (p_TLS_vmthread->restore_guard_page) {
        int res = port_thread_restore_guard_page();

        if (res != 0) {
            Global_Env *env = VM_Global_State::loader_env;

            if (si_is_native(si)) {
                m2n_set_last_frame(prev_m2n);

                if ((interpreter_enabled() || (!prev_m2n) ||
                        (m2n_get_frame_type(prev_m2n) & FRAME_NON_UNWINDABLE))) {
                    exn_raise_by_class(env->java_lang_StackOverflowError_Class);
                } else {
                    //si_free(si);
                    exn_throw_by_class(env->java_lang_StackOverflowError_Class);
                }
            } else {
                //si_free(si);
                exn_throw_by_class(env->java_lang_StackOverflowError_Class);
            }
        }

        p_TLS_vmthread->restore_guard_page = false;
    }

    si_transfer_control(si);
}