// Prints one unwind code. Because an unwind code can occupy up to 3 slots in
// the unwind codes array, this function requires that the correct number of
// slots is provided.
void Dumper::printUnwindCode(const UnwindInfo& UI, ArrayRef<UnwindCode> UC) {
assert(UC.size() >= getNumUsedSlots(UC[0]));
SW.startLine() << format("0x%02X: ", unsigned(UC[0].u.CodeOffset))
<< getUnwindCodeTypeName(UC[0].getUnwindOp());
switch (UC[0].getUnwindOp()) {
case UOP_PushNonVol:
OS << " reg=" << getUnwindRegisterName(UC[0].getOpInfo());
break;
case UOP_AllocLarge:
OS << " size="
<< ((UC[0].getOpInfo() == 0) ? UC[1].FrameOffset * 8
: getLargeSlotValue(UC));
break;
case UOP_AllocSmall:
OS << " size=" << (UC[0].getOpInfo() + 1) * 8;
break;
case UOP_SetFPReg:
if (UI.getFrameRegister() == 0)
OS << " reg=<invalid>";
else
OS << " reg=" << getUnwindRegisterName(UI.getFrameRegister())
<< format(", offset=0x%X", UI.getFrameOffset() * 16);
break;
case UOP_SaveNonVol:
OS << " reg=" << getUnwindRegisterName(UC[0].getOpInfo())
<< format(", offset=0x%X", UC[1].FrameOffset * 8);
break;
case UOP_SaveNonVolBig:
OS << " reg=" << getUnwindRegisterName(UC[0].getOpInfo())
<< format(", offset=0x%X", getLargeSlotValue(UC));
break;
case UOP_SaveXMM128:
OS << " reg=XMM" << static_cast<uint32_t>(UC[0].getOpInfo())
<< format(", offset=0x%X", UC[1].FrameOffset * 16);
break;
case UOP_SaveXMM128Big:
OS << " reg=XMM" << static_cast<uint32_t>(UC[0].getOpInfo())
<< format(", offset=0x%X", getLargeSlotValue(UC));
break;
case UOP_PushMachFrame:
OS << " errcode=" << (UC[0].getOpInfo() == 0 ? "no" : "yes");
break;
}
OS << "\n";
}
void Dumper::printUnwindInfo(const Context &Ctx, const coff_section *Section,
off_t Offset, const UnwindInfo &UI) {
DictScope UIS(SW, "UnwindInfo");
SW.printNumber("Version", UI.getVersion());
SW.printFlags("Flags", UI.getFlags(), makeArrayRef(UnwindFlags));
SW.printNumber("PrologSize", UI.PrologSize);
if (UI.getFrameRegister()) {
SW.printEnum("FrameRegister", UI.getFrameRegister(),
makeArrayRef(UnwindOpInfo));
SW.printHex("FrameOffset", UI.getFrameOffset());
} else {
SW.printString("FrameRegister", StringRef("-"));
SW.printString("FrameOffset", StringRef("-"));
}
SW.printNumber("UnwindCodeCount", UI.NumCodes);
{
ListScope UCS(SW, "UnwindCodes");
ArrayRef<UnwindCode> UC(&UI.UnwindCodes[0], UI.NumCodes);
for (const UnwindCode *UCI = UC.begin(), *UCE = UC.end(); UCI < UCE; ++UCI) {
unsigned UsedSlots = getNumUsedSlots(*UCI);
if (UsedSlots > UC.size()) {
errs() << "corrupt unwind data";
return;
}
printUnwindCode(UI, ArrayRef<UnwindCode>(UCI, UCE));
UCI = UCI + UsedSlots - 1;
}
}
uint64_t LSDAOffset = Offset + getOffsetOfLSDA(UI);
if (UI.getFlags() & (UNW_ExceptionHandler | UNW_TerminateHandler)) {
SW.printString("Handler",
formatSymbol(Ctx, Section, LSDAOffset,
UI.getLanguageSpecificHandlerOffset()));
} else if (UI.getFlags() & UNW_ChainInfo) {
if (const RuntimeFunction *Chained = UI.getChainedFunctionEntry()) {
DictScope CS(SW, "Chained");
printRuntimeFunctionEntry(Ctx, Section, LSDAOffset, *Chained);
}
}
}
Object* VMMethod::interpreter(STATE,
VMMethod* const vmm,
InterpreterCallFrame* const call_frame)
{
#include "vm/gen/instruction_locations.hpp"
if(unlikely(state == 0)) {
VMMethod::instructions = const_cast<void**>(insn_locations);
return NULL;
}
InterpreterState is;
GCTokenImpl gct;
register void** ip_ptr = vmm->addresses;
Object** stack_ptr = call_frame->stk - 1;
int current_unwind = 0;
UnwindInfo unwinds[kMaxUnwindInfos];
continue_to_run:
try {
#undef DISPATCH
#define DISPATCH goto **ip_ptr++
#undef next_int
#define next_int ((opcode)(*ip_ptr++))
#define cache_ip(which) ip_ptr = vmm->addresses + which
#define flush_ip() call_frame->calculate_ip(ip_ptr)
#include "vm/gen/instruction_implementations.hpp"
} catch(TypeError& e) {
flush_ip();
Exception* exc =
Exception::make_type_error(state, e.type, e.object, e.reason);
exc->locations(state, Location::from_call_stack(state, call_frame));
state->raise_exception(exc);
call_frame->scope->flush_to_heap(state);
return NULL;
} catch(const RubyException& exc) {
exc.exception->locations(state,
Location::from_call_stack(state, call_frame));
state->raise_exception(exc.exception);
return NULL;
}
// There is no reason to be here. Either the bytecode loop exits,
// or it jumps to exception;
rubinius::bug("Control flow error in interpreter");
// If control finds it's way down here, there is an exception.
exception:
ThreadState* th = state->vm()->thread_state();
//
switch(th->raise_reason()) {
case cException:
if(current_unwind > 0) {
UnwindInfo* info = &unwinds[--current_unwind];
stack_position(info->stack_depth);
call_frame->set_ip(info->target_ip);
cache_ip(info->target_ip);
goto continue_to_run;
} else {
call_frame->scope->flush_to_heap(state);
return NULL;
}
case cBreak:
// If we're trying to break to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
stack_push(th->raise_value());
th->clear_break();
goto continue_to_run;
// Don't return here, because we want to loop back to the top
// and keep running this method.
}
// Otherwise, fall through and run the unwinds
case cReturn:
case cCatchThrow:
// Otherwise, we're doing a long return/break unwind through
// here. We need to run ensure blocks.
while(current_unwind > 0) {
UnwindInfo* info = &unwinds[--current_unwind];
if(info->for_ensure()) {
stack_position(info->stack_depth);
call_frame->set_ip(info->target_ip);
cache_ip(info->target_ip);
// Don't reset ep here, we're still handling the return/break.
goto continue_to_run;
}
}
// Ok, no ensures to run.
if(th->raise_reason() == cReturn) {
call_frame->scope->flush_to_heap(state);
// If we're trying to return to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
Object* val = th->raise_value();
th->clear_return();
return val;
} else {
// Give control of this exception to the caller.
return NULL;
}
} else { // Not for us!
call_frame->scope->flush_to_heap(state);
// Give control of this exception to the caller.
return NULL;
}
case cExit:
call_frame->scope->flush_to_heap(state);
return NULL;
default:
break;
} // switch
rubinius::bug("Control flow error in interpreter");
return NULL;
}
Object* VMMethod::debugger_interpreter_continue(STATE,
VMMethod* const vmm,
CallFrame* const call_frame,
int sp,
InterpreterState& is,
int current_unwind,
UnwindInfo* unwinds)
{
#include "vm/gen/instruction_locations.hpp"
GCTokenImpl gct;
opcode* stream = vmm->opcodes;
Object** stack_ptr = call_frame->stk + sp;
continue_to_run:
try {
#undef DISPATCH
#define DISPATCH \
if(Object* bp = call_frame->find_breakpoint(state)) { \
if(!Helpers::yield_debugger(state, gct, call_frame, bp)) goto exception; \
} \
goto *insn_locations[stream[call_frame->inc_ip()]];
#undef next_int
#undef cache_ip
#undef flush_ip
#define next_int ((opcode)(stream[call_frame->inc_ip()]))
#define cache_ip(which)
#define flush_ip()
#include "vm/gen/instruction_implementations.hpp"
} catch(TypeError& e) {
flush_ip();
Exception* exc =
Exception::make_type_error(state, e.type, e.object, e.reason);
exc->locations(state, Location::from_call_stack(state, call_frame));
state->raise_exception(exc);
call_frame->scope->flush_to_heap(state);
return NULL;
} catch(const RubyException& exc) {
exc.exception->locations(state,
Location::from_call_stack(state, call_frame));
state->raise_exception(exc.exception);
return NULL;
}
// No reason to be here!
rubinius::bug("Control flow error in interpreter");
exception:
ThreadState* th = state->vm()->thread_state();
//
switch(th->raise_reason()) {
case cException:
if(current_unwind > 0) {
UnwindInfo* info = &unwinds[--current_unwind];
stack_position(info->stack_depth);
call_frame->set_ip(info->target_ip);
cache_ip(info->target_ip);
goto continue_to_run;
} else {
call_frame->scope->flush_to_heap(state);
return NULL;
}
case cBreak:
// If we're trying to break to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
stack_push(th->raise_value());
th->clear_break();
goto continue_to_run;
// Don't return here, because we want to loop back to the top
// and keep running this method.
}
// Otherwise, fall through and run the unwinds
case cReturn:
case cCatchThrow:
// Otherwise, we're doing a long return/break unwind through
// here. We need to run ensure blocks.
while(current_unwind > 0) {
UnwindInfo* info = &unwinds[--current_unwind];
if(info->for_ensure()) {
stack_position(info->stack_depth);
call_frame->set_ip(info->target_ip);
cache_ip(info->target_ip);
// Don't reset ep here, we're still handling the return/break.
goto continue_to_run;
}
}
// Ok, no ensures to run.
if(th->raise_reason() == cReturn) {
call_frame->scope->flush_to_heap(state);
// If we're trying to return to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
Object* val = th->raise_value();
th->clear_return();
return val;
} else {
// Give control of this exception to the caller.
return NULL;
}
} else { // It's cBreak thats not for us!
call_frame->scope->flush_to_heap(state);
// Give control of this exception to the caller.
return NULL;
}
case cExit:
call_frame->scope->flush_to_heap(state);
return NULL;
default:
break;
} // switch
rubinius::bug("Control flow error in interpreter");
return NULL;
}
Object* VMMethod::uncommon_interpreter(STATE,
VMMethod* const vmm,
CallFrame* const call_frame,
int32_t entry_ip,
native_int sp,
CallFrame* const method_call_frame,
jit::RuntimeDataHolder* rd,
int32_t unwind_count,
int32_t* input_unwinds)
{
VMMethod* method_vmm = method_call_frame->cm->backend_method();
if(++method_vmm->uncommon_count > state->shared().config.jit_deoptimize_threshold) {
if(state->shared().config.jit_uncommon_print) {
std::cerr << "[[[ Deoptimizing uncommon method ]]]\n";
call_frame->print_backtrace(state);
std::cerr << "Method Call Frame:\n";
method_call_frame->print_backtrace(state);
}
method_vmm->uncommon_count = 0;
method_vmm->deoptimize(state, method_call_frame->cm, rd);
}
#include "vm/gen/instruction_locations.hpp"
opcode* stream = vmm->opcodes;
InterpreterState is;
GCTokenImpl gct;
Object** stack_ptr = call_frame->stk + sp;
int current_unwind = unwind_count;
UnwindInfo unwinds[kMaxUnwindInfos];
for(int i = 0, j = 0; j < unwind_count; i += 3, j++) {
UnwindInfo& uw = unwinds[j];
uw.target_ip = input_unwinds[i];
uw.stack_depth = input_unwinds[i + 1];
uw.type = (UnwindType)input_unwinds[i + 2];
}
continue_to_run:
try {
#undef DISPATCH
#define DISPATCH goto *insn_locations[stream[call_frame->inc_ip()]];
#undef next_int
#undef cache_ip
#undef flush_ip
#define next_int ((opcode)(stream[call_frame->inc_ip()]))
#define cache_ip(which)
#define flush_ip()
#include "vm/gen/instruction_implementations.hpp"
} catch(TypeError& e) {
flush_ip();
Exception* exc =
Exception::make_type_error(state, e.type, e.object, e.reason);
exc->locations(state, Location::from_call_stack(state, call_frame));
state->raise_exception(exc);
call_frame->scope->flush_to_heap(state);
return NULL;
} catch(const RubyException& exc) {
exc.exception->locations(state,
Location::from_call_stack(state, call_frame));
state->raise_exception(exc.exception);
return NULL;
}
// No reason to be here!
rubinius::bug("Control flow error in interpreter");
exception:
ThreadState* th = state->vm()->thread_state();
//
switch(th->raise_reason()) {
case cException:
if(current_unwind > 0) {
UnwindInfo* info = &unwinds[--current_unwind];
stack_position(info->stack_depth);
call_frame->set_ip(info->target_ip);
cache_ip(info->target_ip);
goto continue_to_run;
} else {
call_frame->scope->flush_to_heap(state);
return NULL;
}
case cBreak:
// If we're trying to break to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
stack_push(th->raise_value());
th->clear_break();
goto continue_to_run;
// Don't return here, because we want to loop back to the top
// and keep running this method.
}
// Otherwise, fall through and run the unwinds
case cReturn:
case cCatchThrow:
// Otherwise, we're doing a long return/break unwind through
// here. We need to run ensure blocks.
while(current_unwind > 0) {
UnwindInfo* info = &unwinds[--current_unwind];
if(info->for_ensure()) {
stack_position(info->stack_depth);
call_frame->set_ip(info->target_ip);
cache_ip(info->target_ip);
// Don't reset ep here, we're still handling the return/break.
goto continue_to_run;
}
}
// Ok, no ensures to run.
if(th->raise_reason() == cReturn) {
call_frame->scope->flush_to_heap(state);
// If we're trying to return to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
Object* val = th->raise_value();
th->clear_return();
return val;
} else {
// Give control of this exception to the caller.
return NULL;
}
} else { // It's cBreak thats not for us!
call_frame->scope->flush_to_heap(state);
// Give control of this exception to the caller.
return NULL;
}
case cExit:
call_frame->scope->flush_to_heap(state);
return NULL;
default:
break;
} // switch
rubinius::bug("Control flow error in interpreter");
return NULL;
}
/* The debugger interpreter loop is used to run a method when a breakpoint
* has been set. It has additional overhead, since it needs to inspect
* each opcode for the breakpoint flag. It is installed on the VMMethod when
* a breakpoint is set on compiled method.
*/
Object* VMMethod::debugger_interpreter(STATE,
VMMethod* const vmm,
InterpreterCallFrame* const call_frame)
{
#include "vm/gen/instruction_locations.hpp"
opcode* stream = vmm->opcodes;
InterpreterState is;
int current_unwind = 0;
UnwindInfo unwinds[kMaxUnwindInfos];
// TODO: ug, cut and paste of the whole interpreter above. Needs to be fast,
// maybe could use a function template?
//
// The only thing different is the DISPATCH macro, to check for debugging
// instructions.
Object** stack_ptr = call_frame->stk - 1;
continue_to_run:
try {
#undef DISPATCH
#define DISPATCH \
if(Object* bp = call_frame->find_breakpoint(state)) { \
if(!Helpers::yield_debugger(state, call_frame, bp)) goto exception; \
} \
goto *insn_locations[stream[call_frame->inc_ip()]];
#undef next_int
#undef cache_ip
#undef flush_ip
#define next_int ((opcode)(stream[call_frame->inc_ip()]))
#define cache_ip(which)
#define flush_ip()
#include "vm/gen/instruction_implementations.hpp"
} catch(TypeError& e) {
flush_ip();
Exception* exc =
Exception::make_type_error(state, e.type, e.object, e.reason);
exc->locations(state, Location::from_call_stack(state, call_frame));
state->thread_state()->raise_exception(exc);
call_frame->scope->flush_to_heap(state);
return NULL;
} catch(const RubyException& exc) {
exc.exception->locations(state,
Location::from_call_stack(state, call_frame));
state->thread_state()->raise_exception(exc.exception);
return NULL;
}
// no reason to be here!
abort();
// If control finds it's way down here, there is an exception.
exception:
ThreadState* th = state->thread_state();
//
switch(th->raise_reason()) {
case cException:
if(current_unwind > 0) {
UnwindInfo* info = &unwinds[--current_unwind];
stack_position(info->stack_depth);
call_frame->set_ip(info->target_ip);
cache_ip(info->target_ip);
goto continue_to_run;
} else {
call_frame->scope->flush_to_heap(state);
return NULL;
}
case cBreak:
// If we're trying to break to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
stack_push(th->raise_value());
th->clear_break();
goto continue_to_run;
// Don't return here, because we want to loop back to the top
// and keep running this method.
}
// Otherwise, fall through and run the unwinds
case cReturn:
case cCatchThrow:
// Otherwise, we're doing a long return/break unwind through
// here. We need to run ensure blocks.
while(current_unwind > 0) {
UnwindInfo* info = &unwinds[--current_unwind];
stack_position(info->stack_depth);
if(info->for_ensure()) {
stack_position(info->stack_depth);
call_frame->set_ip(info->target_ip);
cache_ip(info->target_ip);
// Don't reset ep here, we're still handling the return/break.
goto continue_to_run;
}
}
// Ok, no ensures to run.
if(th->raise_reason() == cReturn) {
call_frame->scope->flush_to_heap(state);
// If we're trying to return to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
Object* val = th->raise_value();
th->clear_return();
return val;
} else {
// Give control of this exception to the caller.
return NULL;
}
} else { // It's cBreak thats not for us!
call_frame->scope->flush_to_heap(state);
// Give control of this exception to the caller.
return NULL;
}
case cExit:
call_frame->scope->flush_to_heap(state);
return NULL;
default:
break;
} // switch
std::cout << "bug!\n";
call_frame->print_backtrace(state);
abort();
return NULL;
}
static uint64_t getOffsetOfLSDA(const UnwindInfo& UI) {
return static_cast<const char*>(UI.getLanguageSpecificData())
- reinterpret_cast<const char*>(&UI);
}
/* The tooling interpreter calls the registered tool for every instruction
* executed.
*/
Object* MachineCode::tooling_interpreter(STATE,
MachineCode* const mcode,
InterpreterCallFrame* const call_frame)
{
#include "vm/gen/instruction_locations.hpp"
opcode* stream = mcode->opcodes;
InterpreterState is;
GCTokenImpl gct;
UnwindInfoSet unwinds;
Object** stack_ptr = call_frame->stk - 1;
continue_to_run:
try {
#undef DISPATCH
#define DISPATCH \
state->shared().tool_broker()->at_ip(state, mcode, call_frame->ip()); \
goto *insn_locations[stream[call_frame->inc_ip()]];
#undef next_int
#undef cache_ip
#undef flush_ip
#define next_int ((opcode)(stream[call_frame->inc_ip()]))
#define cache_ip(which)
#define flush_ip()
#include "vm/gen/instruction_implementations.hpp"
} catch(TypeError& e) {
flush_ip();
Exception* exc =
Exception::make_type_error(state, e.type, e.object, e.reason);
exc->locations(state, Location::from_call_stack(state, call_frame));
state->raise_exception(exc);
call_frame->scope->flush_to_heap(state);
return NULL;
} catch(const RubyException& exc) {
exc.exception->locations(state,
Location::from_call_stack(state, call_frame));
state->raise_exception(exc.exception);
return NULL;
}
// no reason to be here!
rubinius::bug("Control flow error in interpreter");
// If control finds it's way down here, there is an exception.
exception:
VMThreadState* th = state->vm()->thread_state();
//
switch(th->raise_reason()) {
case cException:
if(unwinds.has_unwinds()) {
UnwindInfo info = unwinds.pop();
stack_position(info.stack_depth);
call_frame->set_ip(info.target_ip);
cache_ip(info.target_ip);
goto continue_to_run;
} else {
call_frame->scope->flush_to_heap(state);
return NULL;
}
case cBreak:
// If we're trying to break to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
stack_push(th->raise_value());
th->clear_break();
goto continue_to_run;
// Don't return here, because we want to loop back to the top
// and keep running this method.
}
// Otherwise, fall through and run the unwinds
case cReturn:
case cCatchThrow:
case cThreadKill:
// Otherwise, we're doing a long return/break unwind through
// here. We need to run ensure blocks.
while(unwinds.has_unwinds()) {
UnwindInfo info = unwinds.pop();
stack_position(info.stack_depth);
if(info.for_ensure()) {
stack_position(info.stack_depth);
call_frame->set_ip(info.target_ip);
cache_ip(info.target_ip);
// Don't reset ep here, we're still handling the return/break.
goto continue_to_run;
}
}
// Ok, no ensures to run.
if(th->raise_reason() == cReturn) {
call_frame->scope->flush_to_heap(state);
// If we're trying to return to here, we're done!
if(th->destination_scope() == call_frame->scope->on_heap()) {
Object* val = th->raise_value();
th->clear_return();
return val;
} else {
// Give control of this exception to the caller.
return NULL;
}
} else { // It's cBreak thats not for us!
call_frame->scope->flush_to_heap(state);
// Give control of this exception to the caller.
return NULL;
}
case cExit:
call_frame->scope->flush_to_heap(state);
return NULL;
default:
break;
} // switch
rubinius::bug("Control flow error in interpreter");
return NULL;
}