Example #1
0
// function can be safe point & should be called with disable reqursion = 1
void exn_athrow_regs(Registers * regs, Class_Handle exn_class, bool java_code, bool transfer_control)
{
    assert(!hythread_is_suspend_enabled());
    assert(exn_class);

#ifndef _IPF_
    M2nFrame *cur_m2nf = (M2nFrame *) STD_ALLOCA(m2n_get_size());
    M2nFrame *unw_m2nf;
    ManagedObject *exn_obj = NULL;
    StackIterator *si;
    DebugUtilsTI* ti = VM_Global_State::loader_env->TI;
    VM_thread* vmthread = p_TLS_vmthread;

    if (java_code)
        m2n_push_suspended_frame(vmthread, cur_m2nf, regs);
    else
        // Gregory -
        // Initialize cur_m2nf pointer in case we've crashed in native code that is unwindable,
	// e.g. in the code that sets non-unwindable state for the native code area
        cur_m2nf = m2n_get_last_frame();

    BEGIN_RAISE_AREA;

    si = (StackIterator*) STD_ALLOCA(si_size());
    si_fill_from_native(si);
    ManagedObject *local_exn_obj = NULL;
    exn_obj = exn_propagate_exception(si, &local_exn_obj, exn_class, NULL, NULL, NULL);

    //free local handles
    ObjectHandles* last_m2n_frame_handles = m2n_get_local_handles(cur_m2nf);

    if (last_m2n_frame_handles) {
        free_local_object_handles2(last_m2n_frame_handles);
    }

    if (ti->get_global_capability(DebugUtilsTI::TI_GC_ENABLE_EXCEPTION_EVENT)) {
        VM_thread *thread = p_TLS_vmthread;
        NativeCodePtr callback = (NativeCodePtr)
                jvmti_exception_catch_callback;

        si_copy_to_registers(si, regs);
        vm_set_exception_registers(thread, *regs);
        si_set_callback(si, &callback);
    } else if (p_TLS_vmthread->restore_guard_page) {
        VM_thread *thread = p_TLS_vmthread;
        NativeCodePtr callback = (NativeCodePtr)
                exception_catch_callback;
        si_copy_to_registers(si, regs);
        vm_set_exception_registers(thread, *regs);
        si_set_callback(si, &callback);
    }

    si_copy_to_registers(si, regs);

    if (transfer_control) {
        // Let NCAI to continue single stepping in exception handler
        ncai_setup_signal_step(&vmthread->jvmti_thread, (NativeCodePtr)regs->get_ip());

        set_exception_object_internal(exn_obj);
        si_transfer_control(si);
        assert(!"si_transfer_control should not return");
    } 

    unw_m2nf = si_get_m2n(si);
    //si_free(si);

    END_RAISE_AREA;

    set_exception_object_internal(exn_obj);
    m2n_set_last_frame(unw_m2nf);
#endif
}   //exn_athrow_regs
Example #2
0
// Implementation note: don't use l2 (use l3, l4 instead if required) since its
// space can be used in case of 64-bit return value.
NativeCodePtr compile_create_lil_jni_stub(Method_Handle method, void* func, NativeStubOverride nso)
{
    ASSERT_NO_INTERPRETER;
    const Class_Handle clss = method->get_class();
    bool is_static = method->is_static();
    bool is_synchronised = method->is_synchronized();
    Method_Signature_Handle msh = method_get_signature(method);
    unsigned num_args = method->get_num_args();
    Type_Info_Handle ret_tih = method_ret_type_get_type_info(msh);
    VM_Data_Type ret_type = type_info_get_type(ret_tih);
    unsigned i;

    unsigned num_ref_args = 0; // among original args, does not include jclass for static methods
    for(i=0; i<num_args; i++)
        if (is_reference(method_args_get_type_info(msh, i))) num_ref_args++;

    //***** Part 1: Entry, Stats, Override, push m2n, allocate space for handles
    LilCodeStub* cs = lil_parse_code_stub("entry 0:managed:%0m;",
                                          method);
    assert(cs);

    // Increment stats (total number of calls)
#ifdef VM_STATS
    cs = lil_parse_onto_end(cs,
                            "inc [%0i:pint];",
                            &((Method*)method)->num_accesses);
    assert(cs);
#endif //VM_STATS

    // Do stub override here
    if (nso) cs = nso(cs, method);
    assert(cs);

    // Increment stats (number of nonoverridden calls)
#ifdef VM_STATS
    cs = lil_parse_onto_end(cs,
                            "inc [%0i:pint];",
                            &((Method*)method)->num_slow_accesses);
    assert(cs);
#endif

    // Push M2nFrame
    cs = lil_parse_onto_end(cs, "push_m2n %0i, %1i, handles; locals 3;",
                            method, (POINTER_SIZE_INT)FRAME_JNI);
    assert(cs);

    // Allocate space for handles
    unsigned number_of_object_handles = num_ref_args + (is_static ? 1 : 0);
    cs = oh_gen_allocate_handles(cs, number_of_object_handles, "l0", "l1");
    assert(cs);

    //***** Part 2: Initialize object handles

    if (is_static) {
        void *jlc = clss->get_class_handle();
        cs = lil_parse_onto_end(cs,
                                //"ld l1,[%0i:pint];"
                                "ld l1,[%0i:ref];",
                                jlc);
        assert(cs);
        cs = oh_gen_init_handle(cs, "l0", 0, "l1", false);
        assert(cs);
    } else {
        cs = oh_gen_init_handle(cs, "l0", 0, "i0", true);
    }

    // The remaining handles are for the proper arguments (not including this)
    // Loop over the arguments, skipping 0th argument for instance methods. If argument is a reference, generate code
    unsigned hn = 1;
    for(i=(is_static?0:1); i<num_args; i++) {
        if (is_reference(method_args_get_type_info(msh, i))) {
            char buf[20];
            sprintf(buf, "i%d", i);
            cs = oh_gen_init_handle(cs, "l0", hn, buf, true);
            assert(cs);
            hn++;
        }
    }

    //***** Part 3: Synchronize
    if (is_synchronised) {
        if (is_static) {
            cs = lil_parse_onto_end(cs,
                                    "out stdcall:pint:pint;"
                                    "o0=%0i;"
                                    "call %1i;"
                                    "out stdcall:pint:void;"
                                    "o0=r;"
                                    "call %2i;",
                                    clss,
                                    lil_npc_to_fp(vm_helper_get_addr(VM_RT_CLASS_2_JLC)),
                                    lil_npc_to_fp(vm_helper_get_addr(VM_RT_MONITOR_ENTER)));
            assert(cs);
        } else {
            cs = lil_parse_onto_end(cs,
                                    "out stdcall:ref:void;"
                                    "o0=i0;"
                                    "call %0i;",
                                    lil_npc_to_fp(vm_helper_get_addr(VM_RT_MONITOR_ENTER)));
            assert(cs);
        }
    }

    //***** Call JVMTI MethodEntry
    DebugUtilsTI* ti = VM_Global_State::loader_env->TI;
    if (ti->isEnabled() &&
        ti->get_global_capability(DebugUtilsTI::TI_GC_ENABLE_METHOD_ENTRY))
    {
        cs = lil_parse_onto_end(cs,
                                "out platform:pint:void;"
                                "o0=%0i:pint;"
                                "call %1i;",
                                (jmethodID)method,
                                jvmti_process_method_entry_event);
        assert(cs);
    }

    //***** Part 4: Enable GC
    cs = lil_parse_onto_end(cs,
                            "out platform::void;"
                            "call %0i;",
                            hythread_suspend_enable);
    assert(cs);

    //***** Part 5: Set up arguments

    // Setup outputs, set JNIEnv, set class/this handle
    cs = lil_parse_onto_end(cs,
                            "out jni:%0j;"
                            "l1=ts;"
                            "ld o0,[l1 + %1i:pint];"
                            "o1=l0+%2i;",
                            method,
                            (POINTER_SIZE_INT)APR_OFFSETOF(VM_thread, jni_env),
                            oh_get_handle_offset(0));
    assert(cs);

    // Loop over arguments proper, setting rest of outputs
    unsigned int arg_base = 1 + (is_static ? 1 : 0);
    hn = 1;
    for(i=(is_static?0:1); i<num_args; i++) {
        if (is_reference(method_args_get_type_info(msh, i))) {
            POINTER_SIZE_INT handle_offset = oh_get_handle_offset(hn);
            REFS_RUNTIME_SWITCH_IF
#ifdef REFS_RUNTIME_OR_COMPRESSED
                cs = lil_parse_onto_end(cs,
                                        "jc i%0i=%1i:ref,%n;"
                                        "o%2i=l0+%3i;"
                                        "j %o;"
                                        ":%g;"
                                        "o%4i=0;"
                                        ":%g;",
                                        i,
                                        VM_Global_State::loader_env->managed_null,
                                        arg_base+i, handle_offset, arg_base+i);
#endif // REFS_RUNTIME_OR_COMPRESSED
            REFS_RUNTIME_SWITCH_ELSE
#ifdef REFS_RUNTIME_OR_UNCOMPRESSED
                cs = lil_parse_onto_end(cs,
                                        "jc i%0i=0:ref,%n;"
                                        "o%1i=l0+%2i;"
                                        "j %o;"
                                        ":%g;"
                                        "o%3i=0;"
                                        ":%g;",
                                        i,
                                        arg_base+i, handle_offset,
                                        arg_base+i);
#endif // REFS_RUNTIME_OR_UNCOMPRESSED
            REFS_RUNTIME_SWITCH_ENDIF
            hn++;
        } else {
            cs = lil_parse_onto_end(cs, "o%0i=i%1i;", arg_base+i, i);
        }
        assert(cs);
    }

    //***** Part 6: Call
    cs = lil_parse_onto_end(cs,
                            "call %0i;",
                            func);
    assert(cs);

    //***** Part 7: Save return, widening if necessary
    switch (ret_type) {
    case VM_DATA_TYPE_VOID:
        break;
    case VM_DATA_TYPE_INT32:
        cs = lil_parse_onto_end(cs, "l1=r;");
        break;
    case VM_DATA_TYPE_BOOLEAN:
        cs = lil_parse_onto_end(cs, "l1=zx1 r;");
        break;
    case VM_DATA_TYPE_INT16:
        cs = lil_parse_onto_end(cs, "l1=sx2 r;");
        break;
    case VM_DATA_TYPE_INT8:
        cs = lil_parse_onto_end(cs, "l1=sx1 r;");
        break;
    case VM_DATA_TYPE_CHAR:
        cs = lil_parse_onto_end(cs, "l1=zx2 r;");
        break;
    default:
        cs = lil_parse_onto_end(cs, "l1=r;");
        break;
    }
    assert(cs);

    //***** Part 8: Disable GC
    cs = lil_parse_onto_end(cs,
                            "out platform::void;"
                            "call %0i;",
                            hythread_suspend_disable);
    assert(cs);

    // Exception offsets
    POINTER_SIZE_INT eoo = (POINTER_SIZE_INT)&((VM_thread*)0)->thread_exception.exc_object;
    POINTER_SIZE_INT eco = (POINTER_SIZE_INT)&((VM_thread*)0)->thread_exception.exc_class;

    //***** Call JVMTI MethodExit
    if (ti->isEnabled() &&
        ti->get_global_capability(DebugUtilsTI::TI_GC_ENABLE_METHOD_EXIT))
    {
        cs = lil_parse_onto_end(cs,
                                "out platform:pint,g1,g8:void;"
                                "l2=ts;"
                                "ld l2,[l2+%0i:ref];"
                                "jc l2!=0,_mex_exn_raised;"
                                "l2=ts;"
                                "ld l2,[l2+%1i:ref];"
                                "jc l2!=0,_mex_exn_raised;"
                                "o1=%2i:g1;"
                                "o2=l1:g8;"
                                "j _mex_exn_cont;"
                                ":_mex_exn_raised;"
                                "o1=%3i:g1;"
                                "o2=0:g8;"
                                ":_mex_exn_cont;"
                                "o0=%4i:pint;"
                                "call %5i;",
                                eoo,
                                eco,
                                (POINTER_SIZE_INT)JNI_FALSE,
                                (POINTER_SIZE_INT)JNI_TRUE,
                                (jmethodID)method,
                                jvmti_process_method_exit_event);
        assert(cs);
    }

    //***** Part 9: Synchronize
    if (is_synchronised) {
        if (is_static) {
            cs = lil_parse_onto_end(cs,
                "out stdcall:pint:pint;"
                "o0=%0i;"
                "call %1i;"
                "out stdcall:pint:void;"
                "o0=r;"
                "call %2i;",
                clss,
                lil_npc_to_fp(vm_helper_get_addr(VM_RT_CLASS_2_JLC)),
                lil_npc_to_fp(vm_helper_get_addr(VM_RT_MONITOR_EXIT)));
        } else {
            cs = lil_parse_onto_end(cs,
                "ld l0,[l0+%0i:ref];"
                "out stdcall:ref:void; o0=l0; call %1i;",
                oh_get_handle_offset(0),
                lil_npc_to_fp(vm_helper_get_addr(VM_RT_MONITOR_EXIT)));
        }
        assert(cs);
    }

    //***** Part 10: Unhandle the return if it is a reference
    if (is_reference(ret_tih)) {
        cs = lil_parse_onto_end(cs,
                                "jc l1=0,ret_done;"
                                "ld l1,[l1+0:ref];"
                                ":ret_done;");
#ifdef REFS_RUNTIME_OR_COMPRESSED
        REFS_RUNTIME_SWITCH_IF
            cs = lil_parse_onto_end(cs,
                                    "jc l1!=0,done_translating_ret;"
                                    "l1=%0i:ref;"
                                    ":done_translating_ret;",
                                    VM_Global_State::loader_env->managed_null);
        REFS_RUNTIME_SWITCH_ENDIF
#endif // REFS_RUNTIME_OR_UNCOMPRESSED
        assert(cs);
    }

    //***** Part 11: Rethrow exception
    cs = lil_parse_onto_end(cs,
                            "l0=ts;"
                            "ld l2,[l0+%0i:ref];"
                            "jc l2!=0,_exn_raised;"
                            "ld l2,[l0+%1i:ref];"
                            "jc l2=0,_no_exn;"
                            ":_exn_raised;"
                            "m2n_save_all;"
                            "out platform::void;"
                            "call.noret %2i;"
                            ":_no_exn;",
                            eoo, eco, exn_rethrow);
    assert(cs);

    //***** Part 12: Restore return variable, pop_m2n, return
    if (ret_type != VM_DATA_TYPE_VOID) {
        cs = lil_parse_onto_end(cs, "r=l1;");
        assert(cs);
    }
    cs = lil_parse_onto_end(cs,
                            "pop_m2n;"
                            "ret;");
    assert(cs);

    //***** Now generate code

    assert(lil_is_valid(cs));
    NativeCodePtr addr = LilCodeGenerator::get_platform()->compile(cs, clss->get_class_loader()->GetCodePool());

#ifndef NDEBUG
    char buf[100];
    apr_snprintf(buf, sizeof(buf)-1, "jni_stub.%s::%s", clss->get_name()->bytes,
        method->get_name()->bytes);
    DUMP_STUB(addr, buf, lil_cs_get_code_size(cs));
#endif

#ifdef VM_STATS
    VM_Statistics::get_vm_stats().jni_stub_bytes += lil_cs_get_code_size(cs);
#endif

    lil_free_code_stub(cs);
    return addr;
} // compile_create_lil_jni_stub
Example #3
0
// function can be safe point & should be called with disable reqursion = 1
void exn_throw_for_JIT(ManagedObject* exn_obj, Class_Handle exn_class,
    Method_Handle exn_constr, U_8* jit_exn_constr_args, jvalue* vm_exn_constr_args)
{
/*
 * !!!! NO LOGGER IS ALLOWED IN THIS FUNCTION !!!
 * !!!! RELEASE BUILD WILL BE BROKEN          !!!
 * !!!! NO TRACE2, INFO, WARN, ECHO, ASSERT, ...
 */
    assert(!hythread_is_suspend_enabled());

    if(exn_raised()) {
        return;
    }

    ASSERT_NO_INTERPRETER
    ASSERT_RAISE_AREA;

    if ((exn_obj == NULL) && (exn_class == NULL)) {
        exn_class = VM_Global_State::loader_env->java_lang_NullPointerException_Class;
    }
    ManagedObject* local_exn_obj = exn_obj;
    StackIterator* si = (StackIterator*) STD_ALLOCA(si_size());
    si_fill_from_native(si);

    if (exn_raised()) {
        return;
    }

#ifndef _IPF_
    assert(is_gc_frame_before_m2n_frame());
#endif // _IPF_

    assert(!exn_raised());

    if (si_is_past_end(si)) {
        //FIXME LAZY EXCEPTION (2006.05.12)
        // should be replaced by lazy version
        set_exception_object_internal(local_exn_obj);
        return;
    }

    si_transfer_all_preserved_registers(si);
    assert(!exn_raised());

    DebugUtilsTI* ti = VM_Global_State::loader_env->TI;
    exn_obj = exn_propagate_exception(si, &local_exn_obj, exn_class, exn_constr,
        jit_exn_constr_args, vm_exn_constr_args);

    if (exn_raised()) {
        //si_free(si);
        return;
    }

    M2nFrame* m2nFrame = m2n_get_last_frame();
    ObjectHandles* last_m2n_frame_handles = m2n_get_local_handles(m2nFrame);

    if (last_m2n_frame_handles) {
        free_local_object_handles2(last_m2n_frame_handles);
    }
    set_exception_object_internal(exn_obj);

    if (ti->get_global_capability(DebugUtilsTI::TI_GC_ENABLE_EXCEPTION_EVENT)) {
        Registers regs = {0};
        VM_thread *thread = p_TLS_vmthread;
        NativeCodePtr callback = (NativeCodePtr)
                jvmti_exception_catch_callback;

        si_copy_to_registers(si, &regs);
        vm_set_exception_registers(thread, regs);
        si_set_callback(si, &callback);
    } else if (p_TLS_vmthread->restore_guard_page) {
        Registers regs = {0};
        VM_thread *thread = p_TLS_vmthread;
        NativeCodePtr callback = (NativeCodePtr)
                exception_catch_callback;
        si_copy_to_registers(si, &regs);
        vm_set_exception_registers(thread, regs);
        si_set_callback(si, &callback);
    }

    // don't put any call here
    si_transfer_control(si);
}   //exn_throw_for_JIT