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contops.cpp
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/*
This file is part of TON Blockchain Library.
TON Blockchain Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
TON Blockchain Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
Copyright 2017-2020 Telegram Systems LLP
*/
#include <functional>
#include "vm/contops.h"
#include "vm/log.h"
#include "vm/opctable.h"
#include "vm/stack.hpp"
#include "vm/continuation.h"
#include "vm/cellops.h"
#include "vm/excno.hpp"
#include "vm/vm.h"
using namespace std::literals::string_literals;
namespace vm {
int exec_execute(VmState* st) {
VM_LOG(st) << "execute EXECUTE";
auto cont = st->get_stack().pop_cont();
return st->call(std::move(cont));
}
int exec_callx_args(VmState* st, unsigned args) {
unsigned params = (args >> 4) & 15, retvals = (args & 15);
VM_LOG(st) << "execute CALLXARGS " << params << ',' << retvals;
auto cont = st->get_stack().pop_cont();
return st->call(std::move(cont), params, retvals);
}
int exec_callx_args_p(VmState* st, unsigned args) {
unsigned params = (args & 15);
VM_LOG(st) << "execute CALLXARGS " << params << ",-1\n";
auto cont = st->get_stack().pop_cont();
return st->call(std::move(cont), params, -1);
}
int exec_jmpx(VmState* st) {
VM_LOG(st) << "execute JMPX\n";
auto cont = st->get_stack().pop_cont();
return st->jump(std::move(cont));
}
int exec_jmpx_args(VmState* st, unsigned args) {
unsigned params = args & 15;
VM_LOG(st) << "execute JMPXARGS " << params;
auto cont = st->get_stack().pop_cont();
return st->jump(std::move(cont), params);
}
int exec_ret(VmState* st) {
VM_LOG(st) << "execute RET\n";
return st->ret();
}
int exec_ret_args(VmState* st, unsigned args) {
unsigned params = args & 15;
VM_LOG(st) << "execute RETARGS " << params;
return st->ret(params);
}
int exec_ret_alt(VmState* st) {
VM_LOG(st) << "execute RETALT\n";
return st->ret_alt();
}
int exec_ret_bool(VmState* st) {
VM_LOG(st) << "execute RETBOOL\n";
return st->get_stack().pop_bool() ? st->ret() : st->ret_alt();
}
int exec_callcc(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute CALLCC\n";
auto cont = stack.pop_cont();
auto cc = st->extract_cc(3);
st->get_stack().push_cont(std::move(cc));
return st->jump(std::move(cont));
}
int exec_jmpx_data(VmState* st) {
VM_LOG(st) << "execute JMPXDATA\n";
auto cont = st->get_stack().pop_cont();
st->push_code();
return st->jump(std::move(cont));
}
int exec_callcc_args(VmState* st, unsigned args) {
int params = (args >> 4) & 15, retvals = ((args + 1) & 15) - 1;
Stack& stack = st->get_stack();
VM_LOG(st) << "execute CALLCCARGS " << params << ',' << retvals;
stack.check_underflow(params + 1);
auto cont = stack.pop_cont();
auto cc = st->extract_cc(3, params, retvals);
st->get_stack().push_cont(std::move(cc));
return st->jump(std::move(cont));
}
int exec_callx_varargs(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute CALLXVARARGS\n";
stack.check_underflow(3);
int retvals = stack.pop_smallint_range(254, -1);
int params = stack.pop_smallint_range(254, -1);
return st->call(stack.pop_cont(), params, retvals);
}
int exec_ret_varargs(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute RETVARARGS\n";
int retvals = stack.pop_smallint_range(254, -1);
return st->ret(retvals);
}
int exec_jmpx_varargs(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute JMPXVARARGS\n";
stack.check_underflow(2);
int params = stack.pop_smallint_range(254, -1);
stack.check_underflow(params + 1);
return st->jump(stack.pop_cont(), params);
}
int exec_callcc_varargs(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute CALLCCVARARGS\n";
stack.check_underflow(3);
int retvals = stack.pop_smallint_range(254, -1);
int params = stack.pop_smallint_range(254, -1);
stack.check_underflow(params + 1);
auto cont = stack.pop_cont();
auto cc = st->extract_cc(3, params, retvals);
st->get_stack().push_cont(std::move(cc));
return st->jump(std::move(cont));
}
int exec_do_with_ref(VmState* st, CellSlice& cs, int pfx_bits, const std::function<int(VmState*, Ref<OrdCont>)>& func,
const char* name) {
if (!cs.have_refs(1)) {
throw VmError{Excno::inv_opcode, "no references left for a "s + name + " instruction"};
}
cs.advance(pfx_bits);
auto cell = cs.fetch_ref();
VM_LOG(st) << "execute " << name << " (" << cell->get_hash().to_hex() << ")";
return func(st, st->ref_to_cont(std::move(cell)));
}
int exec_do_with_cell(VmState* st, CellSlice& cs, int pfx_bits, const std::function<int(VmState*, Ref<Cell>)>& func,
const char* name) {
if (!cs.have_refs(1)) {
throw VmError{Excno::inv_opcode, "no references left for a "s + name + " instruction"};
}
cs.advance(pfx_bits);
auto cell = cs.fetch_ref();
VM_LOG(st) << "execute " << name << " (" << cell->get_hash().to_hex() << ")";
return func(st, std::move(cell));
}
int exec_ifelse_ref(VmState* st, CellSlice& cs, int pfx_bits, bool mode) {
const char* name = mode ? "IFREFELSE" : "IFELSEREF";
if (!cs.have_refs(1)) {
throw VmError{Excno::inv_opcode, "no references left for a "s + name + " instruction"};
}
cs.advance(pfx_bits);
auto cell = cs.fetch_ref();
Stack& stack = st->get_stack();
VM_LOG(st) << "execute " << name << " (" << cell->get_hash().to_hex() << ")";
stack.check_underflow(2);
auto cont = stack.pop_cont();
if (stack.pop_bool() == mode) {
cont = st->ref_to_cont(std::move(cell));
} else {
cell.clear();
}
return st->call(std::move(cont));
}
int exec_ifref_elseref(VmState* st, CellSlice& cs, unsigned args, int pfx_bits) {
if (!cs.have_refs(2)) {
throw VmError{Excno::inv_opcode, "no references left for a IFREFELSEREF instruction"};
}
cs.advance(pfx_bits);
auto cell1 = cs.fetch_ref(), cell2 = cs.fetch_ref();
Stack& stack = st->get_stack();
VM_LOG(st) << "execute IFREFELSEREF (" << cell1->get_hash().to_hex() << ") (" << cell2->get_hash().to_hex() << ")";
if (!stack.pop_bool()) {
cell1 = std::move(cell2);
} else {
cell2.clear();
}
return st->call(st->ref_to_cont(std::move(cell1)));
}
int exec_ret_data(VmState* st) {
VM_LOG(st) << "execute RETDATA\n";
st->push_code();
return st->ret();
}
// Mode:
// +1 = same_c3 (set c3 to code)
// +2 = push_0 (push an implicit 0 before running the code)
// +4 = load c4 (persistent data) from stack and return its final value
// +8 = load gas limit from stack and return consumed gas
// +16 = load c7 (smart-contract context)
// +32 = return c5 (actions)
// +64 = pop hard gas limit (enabled by ACCEPT) from stack as well
// +128 = isolated gas consumption (separate set of visited cells, reset chksgn counter)
// +256 = pop number N, return exactly N values from stack (only if res=0 or 1; if not enough then res=stk_und)
int exec_runvm_common(VmState* st, unsigned mode) {
if (mode >= 512) {
throw VmError{Excno::range_chk, "invalid flags"};
}
st->consume_gas(VmState::runvm_gas_price);
Stack& stack = st->get_stack();
bool with_data = mode & 4;
Ref<vm::Tuple> c7;
Ref<vm::Cell> data, actions;
long long gas_max = (mode & 64) ? stack.pop_long_range(vm::GasLimits::infty) : vm::GasLimits::infty;
long long gas_limit = (mode & 8) ? stack.pop_long_range(vm::GasLimits::infty) : vm::GasLimits::infty;
if (!(mode & 64)) {
gas_max = gas_limit;
} else {
gas_max = std::max(gas_max, gas_limit);
}
if (mode & 16) {
c7 = stack.pop_tuple();
}
if (with_data) {
data = stack.pop_cell();
}
int ret_vals = -1;
if (mode & 256) {
ret_vals = stack.pop_smallint_range(1 << 30);
}
auto code = stack.pop_cellslice();
int stack_size = stack.pop_smallint_range(stack.depth() - 1);
std::vector<StackEntry> new_stack_entries(stack_size);
for (int i = 0; i < stack_size; ++i) {
new_stack_entries[stack_size - 1 - i] = stack.pop();
}
td::Ref<Stack> new_stack{true, std::move(new_stack_entries)};
st->consume_stack_gas(new_stack);
gas_max = std::min(gas_max, st->get_gas_limits().gas_remaining);
gas_limit = std::min(gas_limit, st->get_gas_limits().gas_remaining);
vm::GasLimits gas{gas_limit, gas_max};
VmStateInterface::Guard guard{nullptr}; // Don't consume gas for creating/loading cells during VM init
VmState new_state{std::move(code), std::move(new_stack), gas, (int)mode & 3, std::move(data),
VmLog{}, std::vector<Ref<Cell>>{}, std::move(c7)};
new_state.set_chksig_always_succeed(st->get_chksig_always_succeed());
new_state.set_global_version(st->get_global_version());
st->run_child_vm(std::move(new_state), with_data, mode & 32, mode & 8, mode & 128, ret_vals);
return 0;
}
int exec_runvm(VmState* st, unsigned args) {
VM_LOG(st) << "execute RUNVM " << (args & 4095) << "\n";
return exec_runvm_common(st, args & 4095);
}
int exec_runvmx(VmState* st) {
VM_LOG(st) << "execute RUNVMX\n";
return exec_runvm_common(st, st->get_stack().pop_smallint_range(4095));
}
std::string dump_runvm(CellSlice&, unsigned args) {
return PSTRING() << "RUNVM " << (args & 4095);
}
void register_continuation_jump_ops(OpcodeTable& cp0) {
using namespace std::placeholders;
cp0.insert(OpcodeInstr::mksimple(0xd8, 8, "EXECUTE", exec_execute))
.insert(OpcodeInstr::mksimple(0xd9, 8, "JMPX", exec_jmpx))
.insert(OpcodeInstr::mkfixed(0xda, 8, 8, instr::dump_2c("CALLXARGS ", ","), exec_callx_args))
.insert(OpcodeInstr::mkfixed(0xdb0, 12, 4, instr::dump_1c("CALLXARGS ", ",-1"), exec_callx_args_p))
.insert(OpcodeInstr::mkfixed(0xdb1, 12, 4, instr::dump_1c("JMPXARGS "), exec_jmpx_args))
.insert(OpcodeInstr::mkfixed(0xdb2, 12, 4, instr::dump_1c("RETARGS "), exec_ret_args))
.insert(OpcodeInstr::mksimple(0xdb30, 16, "RET", exec_ret))
.insert(OpcodeInstr::mksimple(0xdb31, 16, "RETALT", exec_ret_alt))
.insert(OpcodeInstr::mksimple(0xdb32, 16, "RETBOOL", exec_ret_bool))
.insert(OpcodeInstr::mksimple(0xdb34, 16, "CALLCC", exec_callcc))
.insert(OpcodeInstr::mksimple(0xdb35, 16, "JMPXDATA", exec_jmpx_data))
.insert(OpcodeInstr::mkfixed(0xdb36, 16, 8, instr::dump_2c("CALLCCARGS ", ","), exec_callcc_args))
.insert(OpcodeInstr::mksimple(0xdb38, 16, "CALLXVARARGS", exec_callx_varargs))
.insert(OpcodeInstr::mksimple(0xdb39, 16, "RETVARARGS", exec_ret_varargs))
.insert(OpcodeInstr::mksimple(0xdb3a, 16, "JMPXVARARGS", exec_jmpx_varargs))
.insert(OpcodeInstr::mksimple(0xdb3b, 16, "CALLCCVARARGS", exec_callcc_varargs))
.insert(OpcodeInstr::mkext(0xdb3c, 16, 0, std::bind(dump_push_ref, _1, _2, _3, "CALLREF"),
std::bind(exec_do_with_ref, _1, _2, _4,
[](auto st, auto cont) { return st->call(std::move(cont)); }, "CALLREF"),
compute_len_push_ref))
.insert(OpcodeInstr::mkext(0xdb3d, 16, 0, std::bind(dump_push_ref, _1, _2, _3, "JMPREF"),
std::bind(exec_do_with_ref, _1, _2, _4,
[](auto st, auto cont) { return st->jump(std::move(cont)); }, "JMPREF"),
compute_len_push_ref))
.insert(OpcodeInstr::mkext(0xdb3e, 16, 0, std::bind(dump_push_ref, _1, _2, _3, "JMPREFDATA"),
std::bind(exec_do_with_ref, _1, _2, _4,
[](auto st, auto cont) {
st->push_code();
return st->jump(std::move(cont));
},
"JMPREFDATA"),
compute_len_push_ref))
.insert(OpcodeInstr::mksimple(0xdb3f, 16, "RETDATA", exec_ret_data))
.insert(OpcodeInstr::mkfixed(0xdb4, 12, 12, dump_runvm, exec_runvm)->require_version(4))
.insert(OpcodeInstr::mksimple(0xdb50, 16, "RUNVMX ", exec_runvmx)->require_version(4));
}
int exec_if(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute IF\n";
stack.check_underflow(2);
auto cont = stack.pop_cont();
if (stack.pop_bool()) {
return st->call(std::move(cont));
}
return 0;
}
int exec_ifnot(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute IFNOT\n";
stack.check_underflow(2);
auto cont = stack.pop_cont();
if (!stack.pop_bool()) {
return st->call(std::move(cont));
}
return 0;
}
int exec_if_jmp(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute IFJMP\n";
stack.check_underflow(2);
auto cont = stack.pop_cont();
if (stack.pop_bool()) {
return st->jump(std::move(cont));
}
return 0;
}
int exec_ifnot_jmp(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute IFNOTJMP\n";
stack.check_underflow(2);
auto cont = stack.pop_cont();
if (!stack.pop_bool()) {
return st->jump(std::move(cont));
}
return 0;
}
int exec_ifret(VmState* st) {
VM_LOG(st) << "execute IFRET\n";
if (st->get_stack().pop_bool()) {
return st->ret();
}
return 0;
}
int exec_ifnotret(VmState* st) {
VM_LOG(st) << "execute IFNOTRET\n";
if (!st->get_stack().pop_bool()) {
return st->ret();
}
return 0;
}
int exec_if_else(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute IFELSE\n";
stack.check_underflow(3);
auto cont0 = stack.pop_cont();
auto cont1 = stack.pop_cont();
if (stack.pop_bool()) {
std::swap(cont0, cont1);
}
cont1.clear();
return st->call(std::move(cont0));
}
int exec_condsel(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute CONDSEL\n";
stack.check_underflow(3);
auto y = stack.pop();
auto x = stack.pop();
stack.push(stack.pop_bool() ? std::move(x) : std::move(y));
return 0;
}
int exec_condsel_chk(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute CONDSELCHK\n";
stack.check_underflow(3);
auto y = stack.pop();
auto x = stack.pop();
if (x.type() != y.type()) {
throw VmError{Excno::type_chk, "two arguments of CONDSELCHK have different type"};
}
stack.push(stack.pop_bool() ? std::move(x) : std::move(y));
return 0;
}
int exec_ifretalt(VmState* st) {
VM_LOG(st) << "execute IFRETALT\n";
if (st->get_stack().pop_bool()) {
return st->ret_alt();
}
return 0;
}
int exec_ifnotretalt(VmState* st) {
VM_LOG(st) << "execute IFNOTRETALT\n";
if (!st->get_stack().pop_bool()) {
return st->ret_alt();
}
return 0;
}
int exec_if_bit_jmp(VmState* st, unsigned args) {
bool negate = args & 0x20;
unsigned bit = args & 0x1f;
Stack& stack = st->get_stack();
VM_LOG(st) << "execute IF" << (negate ? "NBITJMP " : "BITJMP ") << bit;
stack.check_underflow(2);
auto cont = stack.pop_cont();
auto x = stack.pop_int_finite();
bool val = x->get_bit(bit);
stack.push_int(std::move(x));
if (val ^ negate) {
return st->jump(std::move(cont));
}
return 0;
}
std::string dump_if_bit_jmp(CellSlice& cs, unsigned args) {
std::ostringstream os;
os << "IF" << (args & 0x20 ? "N" : "") << "BITJMP " << (args & 0x1f);
return os.str();
}
int exec_if_bit_jmpref(VmState* st, CellSlice& cs, unsigned args, int pfx_bits) {
if (!cs.have_refs()) {
throw VmError{Excno::inv_opcode, "no references left for a IFBITJMPREF instruction"};
}
cs.advance(pfx_bits);
auto cell = cs.fetch_ref();
bool negate = args & 0x20;
unsigned bit = args & 0x1f;
Stack& stack = st->get_stack();
VM_LOG(st) << "execute IF" << (negate ? "N" : "") << "BITJMPREF " << bit << " (" << cell->get_hash().to_hex() << ")";
auto x = stack.pop_int_finite();
bool val = x->get_bit(bit);
stack.push_int(std::move(x));
if (val ^ negate) {
return st->jump(st->ref_to_cont(std::move(cell)));
}
return 0;
}
std::string dump_if_bit_jmpref(CellSlice& cs, unsigned args, int pfx_bits) {
if (!cs.have_refs()) {
return "";
}
cs.advance(pfx_bits);
cs.advance_refs(1);
std::ostringstream os;
os << "IF" << (args & 0x20 ? "N" : "") << "BITJMPREF " << (args & 0x1f);
return os.str();
}
int exec_repeat(VmState* st, bool brk) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute REPEAT" << (brk ? "BRK" : "");
stack.check_underflow(2);
auto cont = stack.pop_cont();
int c = stack.pop_smallint_range(0x7fffffff, 0x80000000);
if (c <= 0) {
return 0;
}
return st->repeat(std::move(cont), st->c1_envelope_if(brk, st->extract_cc(1)), c);
}
int exec_repeat_end(VmState* st, bool brk) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute REPEATEND" << (brk ? "BRK" : "");
stack.check_underflow(1);
int c = stack.pop_smallint_range(0x7fffffff, 0x80000000);
if (c <= 0) {
return st->ret();
}
auto cont = st->extract_cc(0);
return st->repeat(std::move(cont), st->c1_envelope_if(brk, st->get_c0()), c);
}
int exec_until(VmState* st, bool brk) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute UNTIL" << (brk ? "BRK" : "");
auto cont = stack.pop_cont();
return st->until(std::move(cont), st->c1_envelope_if(brk, st->extract_cc(1)));
}
int exec_until_end(VmState* st, bool brk) {
VM_LOG(st) << "execute UNTILEND" << (brk ? "BRK" : "");
auto cont = st->extract_cc(0);
return st->until(std::move(cont), st->c1_envelope_if(brk, st->get_c0()));
}
int exec_while(VmState* st, bool brk) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute WHILE" << (brk ? "BRK" : "");
stack.check_underflow(2);
auto body = stack.pop_cont();
auto cond = stack.pop_cont();
return st->loop_while(std::move(cond), std::move(body), st->c1_envelope_if(brk, st->extract_cc(1)));
}
int exec_while_end(VmState* st, bool brk) {
VM_LOG(st) << "execute WHILEEND" << (brk ? "BRK" : "");
auto cond = st->get_stack().pop_cont();
auto body = st->extract_cc(0);
return st->loop_while(std::move(cond), std::move(body), st->c1_envelope_if(brk, st->get_c0()));
}
int exec_again(VmState* st, bool brk) {
VM_LOG(st) << "execute AGAIN" << (brk ? "BRK" : "");
if (brk) {
st->set_c1(st->extract_cc(3));
}
return st->again(st->get_stack().pop_cont());
}
int exec_again_end(VmState* st, bool brk) {
VM_LOG(st) << "execute AGAINEND" << (brk ? "BRK" : "");
if (brk) {
st->c1_save_set();
}
return st->again(st->extract_cc(0));
}
void register_continuation_cond_loop_ops(OpcodeTable& cp0) {
using namespace std::placeholders;
cp0.insert(OpcodeInstr::mksimple(0xdc, 8, "IFRET", exec_ifret))
.insert(OpcodeInstr::mksimple(0xdd, 8, "IFNOTRET", exec_ifnotret))
.insert(OpcodeInstr::mksimple(0xde, 8, "IF", exec_if))
.insert(OpcodeInstr::mksimple(0xdf, 8, "IFNOT", exec_ifnot))
.insert(OpcodeInstr::mksimple(0xe0, 8, "IFJMP", exec_if_jmp))
.insert(OpcodeInstr::mksimple(0xe1, 8, "IFNOTJMP", exec_ifnot_jmp))
.insert(OpcodeInstr::mksimple(0xe2, 8, "IFELSE", exec_if_else))
.insert(OpcodeInstr::mkext(0xe300, 16, 0, std::bind(dump_push_ref, _1, _2, _3, "IFREF"),
std::bind(exec_do_with_cell, _1, _2, _4,
[](auto st, auto cell) {
return st->get_stack().pop_bool()
? st->call(st->ref_to_cont(std::move(cell)))
: 0;
},
"IFREF"),
compute_len_push_ref))
.insert(OpcodeInstr::mkext(0xe301, 16, 0, std::bind(dump_push_ref, _1, _2, _3, "IFNOTREF"),
std::bind(exec_do_with_cell, _1, _2, _4,
[](auto st, auto cell) {
return st->get_stack().pop_bool()
? 0
: st->call(st->ref_to_cont(std::move(cell)));
},
"IFNOTREF"),
compute_len_push_ref))
.insert(OpcodeInstr::mkext(0xe302, 16, 0, std::bind(dump_push_ref, _1, _2, _3, "IFJMPREF"),
std::bind(exec_do_with_cell, _1, _2, _4,
[](auto st, auto cell) {
return st->get_stack().pop_bool()
? st->jump(st->ref_to_cont(std::move(cell)))
: 0;
},
"IFJMPREF"),
compute_len_push_ref))
.insert(OpcodeInstr::mkext(0xe303, 16, 0, std::bind(dump_push_ref, _1, _2, _3, "IFNOTJMPREF"),
std::bind(exec_do_with_cell, _1, _2, _4,
[](auto st, auto cell) {
return st->get_stack().pop_bool()
? 0
: st->jump(st->ref_to_cont(std::move(cell)));
},
"IFNOTJMPREF"),
compute_len_push_ref))
.insert(OpcodeInstr::mksimple(0xe304, 16, "CONDSEL", exec_condsel))
.insert(OpcodeInstr::mksimple(0xe305, 16, "CONDSELCHK", exec_condsel_chk))
.insert(OpcodeInstr::mksimple(0xe308, 16, "IFRETALT", exec_ifretalt))
.insert(OpcodeInstr::mksimple(0xe309, 16, "IFNOTRETALT", exec_ifnotretalt))
.insert(OpcodeInstr::mkext(0xe30d, 16, 0, std::bind(dump_push_ref, _1, _2, _3, "IFREFELSE"),
std::bind(exec_ifelse_ref, _1, _2, _4, true), compute_len_push_ref))
.insert(OpcodeInstr::mkext(0xe30e, 16, 0, std::bind(dump_push_ref, _1, _2, _3, "IFELSEREF"),
std::bind(exec_ifelse_ref, _1, _2, _4, false), compute_len_push_ref))
.insert(OpcodeInstr::mkext(0xe30f, 16, 0, std::bind(dump_push_ref2, _1, _2, _3, "IFREFELSEREF"),
exec_ifref_elseref, compute_len_push_ref2))
.insert(OpcodeInstr::mkfixed(0xe380 >> 6, 10, 6, dump_if_bit_jmp, exec_if_bit_jmp))
.insert(OpcodeInstr::mkext(0xe3c0 >> 6, 10, 6, dump_if_bit_jmpref, exec_if_bit_jmpref, compute_len_push_ref))
.insert(OpcodeInstr::mksimple(0xe4, 8, "REPEAT", std::bind(exec_repeat, _1, false)))
.insert(OpcodeInstr::mksimple(0xe5, 8, "REPEATEND", std::bind(exec_repeat_end, _1, false)))
.insert(OpcodeInstr::mksimple(0xe6, 8, "UNTIL", std::bind(exec_until, _1, false)))
.insert(OpcodeInstr::mksimple(0xe7, 8, "UNTILEND", std::bind(exec_until_end, _1, false)))
.insert(OpcodeInstr::mksimple(0xe8, 8, "WHILE", std::bind(exec_while, _1, false)))
.insert(OpcodeInstr::mksimple(0xe9, 8, "WHILEEND", std::bind(exec_while_end, _1, false)))
.insert(OpcodeInstr::mksimple(0xea, 8, "AGAIN", std::bind(exec_again, _1, false)))
.insert(OpcodeInstr::mksimple(0xeb, 8, "AGAINEND", std::bind(exec_again_end, _1, false)))
.insert(OpcodeInstr::mksimple(0xe314, 16, "REPEATBRK", std::bind(exec_repeat, _1, true)))
.insert(OpcodeInstr::mksimple(0xe315, 16, "REPEATENDBRK", std::bind(exec_repeat_end, _1, true)))
.insert(OpcodeInstr::mksimple(0xe316, 16, "UNTILBRK", std::bind(exec_until, _1, true)))
.insert(OpcodeInstr::mksimple(0xe317, 16, "UNTILENDBRK", std::bind(exec_until_end, _1, true)))
.insert(OpcodeInstr::mksimple(0xe318, 16, "WHILEBRK", std::bind(exec_while, _1, true)))
.insert(OpcodeInstr::mksimple(0xe319, 16, "WHILEENDBRK", std::bind(exec_while_end, _1, true)))
.insert(OpcodeInstr::mksimple(0xe31a, 16, "AGAINBRK", std::bind(exec_again, _1, true)))
.insert(OpcodeInstr::mksimple(0xe31b, 16, "AGAINENDBRK", std::bind(exec_again_end, _1, true)));
}
int exec_setcontargs_common(VmState* st, int copy, int more) {
Stack& stack = st->get_stack();
stack.check_underflow(copy + 1);
auto cont = stack.pop_cont();
if (copy || more >= 0) {
ControlData* cdata = force_cdata(cont);
if (copy > 0) {
if (cdata->nargs >= 0 && cdata->nargs < copy) {
throw VmError{Excno::stk_ov, "too many arguments copied into a closure continuation"};
}
if (cdata->stack.is_null()) {
cdata->stack = stack.split_top(copy);
} else {
cdata->stack.write().move_from_stack(stack, copy);
}
st->consume_stack_gas(cdata->stack);
if (cdata->nargs >= 0) {
cdata->nargs -= copy;
}
}
if (more >= 0) {
if (cdata->nargs > more) {
cdata->nargs = 0x40000000; // will throw an exception if run
} else if (cdata->nargs < 0) {
cdata->nargs = more;
}
}
}
st->get_stack().push_cont(std::move(cont));
return 0;
}
int exec_setcontargs(VmState* st, unsigned args) {
int copy = (args >> 4) & 15, more = ((args + 1) & 15) - 1;
VM_LOG(st) << "execute SETCONTARGS " << copy << ',' << more;
return exec_setcontargs_common(st, copy, more);
}
std::string dump_setcontargs(CellSlice& cs, unsigned args, const char* name) {
int copy = (args >> 4) & 15, more = ((args + 1) & 15) - 1;
std::ostringstream os;
os << name << ' ' << copy << ',' << more;
return os.str();
}
int exec_setcont_varargs(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute SETCONTVARARGS\n";
stack.check_underflow(2);
int more = stack.pop_smallint_range(255, -1);
int copy = stack.pop_smallint_range(255);
return exec_setcontargs_common(st, copy, more);
}
int exec_setnum_varargs(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute SETNUMVARARGS\n";
stack.check_underflow(2);
int more = stack.pop_smallint_range(255, -1);
return exec_setcontargs_common(st, 0, more);
}
int exec_return_args_common(VmState* st, int count) {
Stack& stack = st->get_stack();
stack.check_underflow(count);
if (stack.depth() == count) {
return 0;
}
int copy = stack.depth() - count;
Ref<Stack> alt_stk = st->swap_stack(stack.split_top(count));
auto cont = st->get_c0();
ControlData* cdata = force_cdata(cont);
if (cdata->nargs >= 0 && cdata->nargs < copy) {
throw VmError{Excno::stk_ov, "too many arguments copied into a closure continuation"};
}
if (cdata->stack.is_null()) {
cdata->stack = std::move(alt_stk);
} else {
cdata->stack.write().move_from_stack(alt_stk.write(), copy);
alt_stk.clear();
}
st->consume_stack_gas(cdata->stack);
if (cdata->nargs >= 0) {
cdata->nargs -= copy;
}
st->set_c0(std::move(cont));
return 0;
}
int exec_return_args(VmState* st, unsigned args) {
int count = args & 15;
VM_LOG(st) << "execute RETURNARGS " << count;
return exec_return_args_common(st, count);
}
int exec_return_varargs(VmState* st) {
VM_LOG(st) << "execute RETURNVARARGS\n";
return exec_return_args_common(st, st->get_stack().pop_smallint_range(255));
}
int exec_bless(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute BLESS\n";
stack.push_cont(Ref<OrdCont>{true, stack.pop_cellslice(), st->get_cp()});
return 0;
}
int exec_bless_args_common(VmState* st, int copy, int more) {
Stack& stack = st->get_stack();
stack.check_underflow(copy + 1);
auto cs = stack.pop_cellslice();
auto new_stk = stack.split_top(copy);
st->consume_stack_gas(new_stk);
stack.push_cont(Ref<OrdCont>{true, std::move(cs), st->get_cp(), std::move(new_stk), more});
return 0;
}
int exec_bless_varargs(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute BLESSVARARGS\n";
stack.check_underflow(2);
int more = stack.pop_smallint_range(255, -1);
int copy = stack.pop_smallint_range(255);
return exec_bless_args_common(st, copy, more);
}
int exec_bless_args(VmState* st, unsigned args) {
int copy = (args >> 4) & 15, more = ((args + 1) & 15) - 1;
VM_LOG(st) << "execute BLESSARGS " << copy << ',' << more;
return exec_bless_args_common(st, copy, more);
}
int exec_push_ctr(VmState* st, unsigned args) {
unsigned idx = args & 15;
VM_LOG(st) << "execute PUSH c" << idx;
st->get_stack().push(st->get(idx));
return 0;
}
namespace {
inline void throw_typechk(bool ok) {
if (!ok) {
throw VmError{Excno::type_chk, "invalid value type for control register"};
}
}
inline void throw_rangechk(bool ok) {
if (!ok) {
throw VmError{Excno::range_chk, "control register index out of range"};
}
}
} // namespace
int exec_bless_pop_c3(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute CTOSBLESSPOPc3";
stack.check_underflow(1);
throw_typechk(st->set_c(3, Ref<OrdCont>{true, vm::load_cell_slice_ref(stack.pop_cell()), st->get_cp()}));
return 0;
}
int exec_pop_ctr(VmState* st, unsigned args) {
unsigned idx = args & 15;
VM_LOG(st) << "execute POP c" << idx;
/*
if (idx == 3 && st->get_stack().depth() > 0 && st->get_stack().tos().is(StackEntry::t_cell)) {
// temp hack: accept cell argument for POP c3 and do auto-BLESSing
return exec_bless_pop_c3(st);
}
*/
throw_typechk(st->set(idx, st->get_stack().pop_chk()));
return 0;
}
int exec_setcont_ctr(VmState* st, unsigned args) {
unsigned idx = args & 15;
Stack& stack = st->get_stack();
VM_LOG(st) << "execute SETCONTCTR c" << idx;
stack.check_underflow(2);
auto cont = stack.pop_cont();
throw_typechk(force_cregs(cont)->define(idx, stack.pop_chk()));
st->get_stack().push_cont(std::move(cont));
return 0;
}
int exec_setret_ctr(VmState* st, unsigned args) {
unsigned idx = args & 15;
VM_LOG(st) << "execute SETRETCTR c" << idx;
auto cont = st->get_c0();
throw_typechk(force_cregs(cont)->define(idx, st->get_stack().pop_chk()));
st->set_c0(std::move(cont));
return 0;
}
int exec_setalt_ctr(VmState* st, unsigned args) {
unsigned idx = args & 15;
VM_LOG(st) << "execute SETALTCTR c" << idx;
auto cont = st->get_c1();
throw_typechk(force_cregs(cont)->define(idx, st->get_stack().pop_chk()));
st->set_c1(std::move(cont));
return 0;
}
int exec_popsave_ctr(VmState* st, unsigned args) {
unsigned idx = args & 15;
VM_LOG(st) << "execute POPSAVE c" << idx;
auto val = st->get_stack().pop_chk();
auto c0 = st->get_c0();
throw_typechk(idx || val.is(StackEntry::t_vmcont));
force_cregs(c0)->define(idx, st->get(idx));
if (!idx) {
st->set_c0(std::move(c0));
throw_typechk(st->set(idx, std::move(val)));
} else {
throw_typechk(st->set(idx, std::move(val)));
st->set_c0(std::move(c0));
}
return 0;
}
int exec_save_ctr(VmState* st, unsigned args) {
unsigned idx = args & 15;
VM_LOG(st) << "execute SAVECTR c" << idx;
auto c0 = st->get_c0();
throw_typechk(force_cregs(c0)->define(idx, st->get(idx)));
st->set_c0(std::move(c0));
return 0;
}
int exec_samealt(VmState* st, bool save) {
VM_LOG(st) << "execute SAMEALT" << (save ? "SAVE" : "");
auto c0 = st->get_c0();
if (save) {
force_cregs(c0)->define_c1(st->get_c1());
st->set_c0(c0);
}
st->set_c1(std::move(c0));
return 0;
}
int exec_savealt_ctr(VmState* st, unsigned args) {
unsigned idx = args & 15;
VM_LOG(st) << "execute SAVEALTCTR c" << idx;
auto c1 = st->get_c1();
throw_typechk(force_cregs(c1)->define(idx, st->get(idx)));
st->set_c1(std::move(c1));
return 0;
}
int exec_saveboth_ctr(VmState* st, unsigned args) {
unsigned idx = args & 15;
VM_LOG(st) << "execute SAVEBOTHCTR c" << idx;
auto c0 = st->get_c0(), c1 = st->get_c1();
auto val = st->get(idx);
force_cregs(c0)->define(idx, val);
force_cregs(c1)->define(idx, std::move(val));
st->set_c0(std::move(c0));
st->set_c1(std::move(c1));
return 0;
}
int exec_push_ctr_var(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute PUSHCTRX\n";
unsigned idx = stack.pop_smallint_range(16);
auto val = st->get(idx);
throw_rangechk(!val.empty());
stack.push(std::move(val));
return 0;
}
int exec_pop_ctr_var(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute POPCTRX\n";
stack.check_underflow(2);
unsigned idx = stack.pop_smallint_range(16);
throw_rangechk(ControlRegs::valid_idx(idx));
throw_typechk(st->set(idx, stack.pop_chk()));
return 0;
}
int exec_setcont_ctr_var(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute SETCONTCTRX\n";
stack.check_underflow(3);
unsigned idx = stack.pop_smallint_range(16);
throw_rangechk(ControlRegs::valid_idx(idx));
auto cont = stack.pop_cont();
throw_typechk(force_cregs(cont)->define(idx, stack.pop_chk()));
st->get_stack().push_cont(std::move(cont));
return 0;
}
int exec_compos(VmState* st, unsigned mask, const char* name) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute " << name;
stack.check_underflow(2);
auto val = stack.pop_cont();
auto cont = stack.pop_cont();
ControlRegs* regs = force_cregs(cont);
switch (mask) {
case 1:
regs->define_c0(std::move(val));
break;
case 3:
regs->define_c0(val);
// fallthrough
case 2:
regs->define_c1(std::move(val));
break;
}
st->get_stack().push_cont(std::move(cont));
return 0;
}
int exec_atexit(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute ATEXIT\n";
auto cont = stack.pop_cont();
force_cregs(cont)->define_c0(st->get_c0());
st->set_c0(std::move(cont));
return 0;
}
int exec_atexit_alt(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute ATEXITALT\n";
auto cont = stack.pop_cont();
force_cregs(cont)->define_c1(st->get_c1());
st->set_c1(std::move(cont));
return 0;
}
int exec_setexit_alt(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute SETEXITALT\n";
auto cont = stack.pop_cont();
force_cregs(cont)->define_c0(st->get_c0());
force_cregs(cont)->define_c1(st->get_c1());
st->set_c1(std::move(cont));
return 0;
}
int exec_thenret(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute THENRET\n";
auto cont = stack.pop_cont();
force_cregs(cont)->define_c0(st->get_c0());
stack.push_cont(std::move(cont));
return 0;
}
int exec_thenret_alt(VmState* st) {
Stack& stack = st->get_stack();
VM_LOG(st) << "execute THENRETALT\n";
auto cont = stack.pop_cont();
force_cregs(cont)->define_c0(st->get_c1());
stack.push_cont(std::move(cont));
return 0;
}
int exec_invert(VmState* st) {
VM_LOG(st) << "execute INVERT\n";
auto c0 = st->get_c0(), c1 = st->get_c1();
st->set_c0(std::move(c1));
st->set_c1(std::move(c0));
return 0;
}