// 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, ®s);
M2nFrame* prev_m2n = m2n_get_previous_frame(m2n);
StackIterator* si = (StackIterator*) STD_ALLOCA(si_size());
si_fill_from_registers(si, ®s, 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);
}
/*
* Get Bytecodes
*
* For the method indicated by method, return the byte codes that
* implement the method. The number of bytecodes is returned via
* bytecode_count_ptr. The byte codes themselves are returned via
* bytecodes_ptr.
*
* OPTIONAL Functionality.
*/
jvmtiError JNICALL
jvmtiGetBytecodes(jvmtiEnv* env,
jmethodID method,
jint* bytecode_count_ptr,
unsigned char** bytecodes_ptr)
{
TRACE("GetBytecodes called");
SuspendEnabledChecker sec;
/*
* Check given env & current phase.
*/
jvmtiPhase phases[] = {JVMTI_PHASE_START, JVMTI_PHASE_LIVE};
CHECK_EVERYTHING();
CHECK_CAPABILITY(can_get_bytecodes);
/**
* Check is_native_ptr
*/
if( !bytecode_count_ptr || !bytecodes_ptr ) {
return JVMTI_ERROR_NULL_POINTER;
}
/**
* Check method
*/
if( !method ) {
return JVMTI_ERROR_INVALID_METHODID;
}
Method* mtd = (Method*)method;
if( mtd->is_native() ) return JVMTI_ERROR_NATIVE_METHOD;
if( mtd->get_byte_code_addr() == NULL ) return JVMTI_ERROR_OUT_OF_MEMORY;
*bytecode_count_ptr = mtd->get_byte_code_size();
jvmtiError err = _allocate( *bytecode_count_ptr, bytecodes_ptr );
if( err != JVMTI_ERROR_NONE ) return err;
memcpy( *bytecodes_ptr, mtd->get_byte_code_addr(), *bytecode_count_ptr );
if (interpreter_enabled())
{
TIEnv *p_env = (TIEnv *)env;
VMBreakPoints* vm_brpt = p_env->vm->vm_env->TI->vm_brpt;
LMAutoUnlock lock(vm_brpt->get_lock());
for (VMBreakPoint* bpt = vm_brpt->find_method_breakpoint(method); bpt;
bpt = vm_brpt->find_next_method_breakpoint(bpt, method))
{
(*bytecodes_ptr)[bpt->location] =
(unsigned char)bpt->saved_byte;
}
}
return JVMTI_ERROR_NONE;
}
static void ti_enumerate_thread(TIEnv *ti_env, VM_thread* thread)
{
TIIterationState *state = ti_env->iteration_state;
state->root_kind = JVMTI_HEAP_ROOT_THREAD;
state->thread_tag = ti_env->tags->get(
(Managed_Object_Handle)
jthread_self()->object);
if (interpreter_enabled()) {
interpreter.interpreter_ti_enumerate_thread((jvmtiEnv*)ti_env, thread);
} else {
jitted_ti_enumerate_thread((jvmtiEnv*)ti_env, thread);
}
}
// 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, ®s);
M2nFrame* prev_m2n = m2n_get_previous_frame(m2n);
StackIterator* si = (StackIterator*) STD_ALLOCA(si_size());
si_fill_from_registers(si, ®s, 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);
}
IDATA jthread_throw_exception_object(jobject object)
{
if (interpreter_enabled()) {
// FIXME - Function set_current_thread_exception does the same
// actions as exn_raise_object, and it should be replaced.
hythread_suspend_disable();
set_current_thread_exception(object->object);
hythread_suspend_enable();
} else {
if (is_unwindable()) {
exn_throw_object(object);
} else {
ASSERT_RAISE_AREA;
exn_raise_object(object);
}
}
return 0;
}
bool set_unwindable(bool unwindable)
{
M2nFrame* lastFrame = m2n_get_last_frame();
if (interpreter_enabled() || (!lastFrame)) {
assert(!unwindable);
return false;
}
int lastFrameType = m2n_get_frame_type(lastFrame);
bool previousValue = !(lastFrameType & FRAME_NON_UNWINDABLE);
if (unwindable) {
lastFrameType &= ~FRAME_NON_UNWINDABLE;
} else {
lastFrameType |= FRAME_NON_UNWINDABLE;
}
m2n_set_frame_type( lastFrame, (frame_type) lastFrameType);
return previousValue;
}
jvmtiError JNICALL
jvmtiGetLocalLong(jvmtiEnv* env,
jthread thread,
jint depth,
jint slot,
jlong* value_ptr)
{
TRACE("GetLocalLong called");
SuspendEnabledChecker sec;
/*
* Check given env & current phase.
*/
jvmtiPhase phases[] = {JVMTI_PHASE_LIVE};
CHECK_EVERYTHING();
CHECK_CAPABILITY(can_access_local_variables);
// check error condition: JVMTI_ERROR_INVALID_THREAD
// check error condition: JVMTI_ERROR_THREAD_NOT_ALIVE
// check error condition: JVMTI_ERROR_ILLEGAL_ARGUMENT
// check error condition: JVMTI_ERROR_NULL_POINTER
jvmtiError err = GetLocal_checkArgs(env, &thread, depth, slot, value_ptr);
if (err != JVMTI_ERROR_NONE)
return err;
bool thread_suspended = false;
// Suspend thread before getting stacks
vm_thread_t vm_thread;
if (NULL != thread)
{
// Check that this thread is not current
vm_thread = jthread_get_vm_thread_ptr_safe(thread);
if (vm_thread != p_TLS_vmthread)
{
IDATA UNREF status = hythread_suspend_other((hythread_t)vm_thread);
assert(TM_ERROR_NONE == status);
thread_suspended = true;
}
}
else
vm_thread = p_TLS_vmthread;
if (interpreter_enabled())
// check error condition: JVMTI_ERROR_INVALID_SLOT
// check error condition: JVMTI_ERROR_OPAQUE_FRAME
// check error condition: JVMTI_ERROR_NO_MORE_FRAMES
// TODO: check error condition: JVMTI_ERROR_TYPE_MISMATCH
err = interpreter.interpreter_ti_getLocal64(env,
vm_thread, depth, slot, value_ptr);
else
{
GET_JIT_FRAME_CONTEXT;
tmn_suspend_disable();
OpenExeJpdaError result = jit->get_local_var(method, jfc, slot,
VM_DATA_TYPE_INT64, value_ptr);
si_free(si);
tmn_suspend_enable();
err = jvmti_translate_jit_error(result);
}
if (thread_suspended)
hythread_resume((hythread_t)vm_thread);
return err;
}
/**
* General function to set value of local variable.
* @param var_type type of the local variable
* @param p_value pointer to the new variable value
*/
static jvmtiError set_local(jvmtiEnv* env,
jthread thread,
jint depth,
jint slot,
VM_Data_Type var_type,
void* p_value)
{
SuspendEnabledChecker sec;
/*
* Check given env & current phase.
*/
jvmtiPhase phases[] = {JVMTI_PHASE_LIVE};
CHECK_EVERYTHING();
CHECK_CAPABILITY(can_access_local_variables);
// check error condition: JVMTI_ERROR_INVALID_THREAD
// check error condition: JVMTI_ERROR_THREAD_NOT_ALIVE
// check error condition: JVMTI_ERROR_ILLEGAL_ARGUMENT
jvmtiError err = GetLocal_checkArgs(env, &thread, depth, slot, p_value);
if (err != JVMTI_ERROR_NONE)
return err;
// check error condition: JVMTI_ERROR_INVALID_OBJECT
if (VM_DATA_TYPE_CLASS == var_type && ! is_valid_object(env, *(jobject*) p_value))
return JVMTI_ERROR_INVALID_OBJECT;
bool thread_suspended = false;
// Suspend thread before getting stacks
vm_thread_t vm_thread;
if (NULL != thread)
{
// Check that this thread is not current
vm_thread = jthread_get_vm_thread_ptr_safe(thread);
if (vm_thread != p_TLS_vmthread)
{
IDATA UNREF status = hythread_suspend_other((hythread_t)vm_thread);
assert(TM_ERROR_NONE == status);
thread_suspended = true;
}
}
else
vm_thread = p_TLS_vmthread;
if (interpreter_enabled())
{
// TODO: check error condition: JVMTI_ERROR_INVALID_SLOT
// TODO: check error condition: JVMTI_ERROR_TYPE_MISMATCH
// TODO: check error condition: JVMTI_ERROR_OPAQUE_FRAME
// TODO: check error condition: JVMTI_ERROR_NO_MORE_FRAMES
switch (var_type) {
case VM_DATA_TYPE_CLASS:
err = interpreter.interpreter_ti_setObject(env, vm_thread,
depth, slot, *(jobject*) p_value);
break;
case VM_DATA_TYPE_INT32:
case VM_DATA_TYPE_F4:
err = interpreter.interpreter_ti_setLocal32(env, vm_thread,
depth, slot, *(int*) p_value);
break;
case VM_DATA_TYPE_INT64:
case VM_DATA_TYPE_F8:
err = interpreter.interpreter_ti_setLocal64(env, vm_thread,
depth, slot, *(int64*) p_value);
break;
default:
DIE(("Error: unrecognized local variable type"));
}
}
else
{
GET_JIT_FRAME_CONTEXT;
tmn_suspend_disable();
OpenExeJpdaError result;
switch (var_type) {
case VM_DATA_TYPE_CLASS:
if (NULL != *(jobject*) p_value)
result = jit->set_local_var(method, jfc, slot,
VM_DATA_TYPE_CLASS, &(*(ObjectHandle*) p_value)->object);
else
{
ManagedObject *n = (ManagedObject *)VM_Global_State::loader_env->managed_null;
result = jit->set_local_var(method, jfc, slot,
VM_DATA_TYPE_CLASS, &n);
}
break;
case VM_DATA_TYPE_INT32:
case VM_DATA_TYPE_F4:
case VM_DATA_TYPE_INT64:
case VM_DATA_TYPE_F8:
result = jit->set_local_var(method, jfc, slot, var_type,
p_value);
break;
default:
DIE(("Error: unrecognized local variable type"));
}
si_free(si);
tmn_suspend_enable();
err = jvmti_translate_jit_error(result);
}
if (thread_suspended)
hythread_resume((hythread_t)vm_thread);
return err;
}
bool is_unwindable()
{
M2nFrame* lastFrame = m2n_get_last_frame();
return !(interpreter_enabled() || (!lastFrame)
|| (m2n_get_frame_type(lastFrame) & FRAME_NON_UNWINDABLE));
}
