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fix: AVM witgen track gas for nested calls and external halts #10731

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Merged
dbanks12 merged 12 commits into from
Dec 17, 2024
Merged

fix: AVM witgen track gas for nested calls and external halts #10731

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8de5b36
fix: AVM witgen track gas for nested calls and external halts
Dec 13, 2024
543e0ce
cleanup
Dec 13, 2024
ede026e
debugs
Dec 13, 2024
af7c38f
comment
Dec 13, 2024
ab8058f
fix
Dec 17, 2024
8bce306
fix
Dec 17, 2024
e0e66e6
fmt
Dec 17, 2024
34d0c79
cleanup
Dec 17, 2024
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fmt
Dec 17, 2024
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Merge branch 'master' into db/gas-halts
dbanks12 Dec 17, 2024
c32d97c
fix
Dec 17, 2024
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Dec 17, 2024
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8 changes: 4 additions & 4 deletions barretenberg/cpp/pil/avm/gas.pil
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Original file line number Diff line number Diff line change
Expand Up @@ -64,10 +64,10 @@ namespace main(256);
is_fake_row * (1 - is_fake_row) = 0; // Temporary

//TODO(8945): clean up fake row related code
#[L2_GAS_NO_DECREMENT_FAKE_ROW]
is_fake_row * (l2_gas_remaining - l2_gas_remaining') = 0;
#[DA_GAS_NO_DECREMENT_FAKE_ROW]
is_fake_row * (da_gas_remaining - da_gas_remaining') = 0;
//#[L2_GAS_NO_DECREMENT_FAKE_ROW]
//is_fake_row * (l2_gas_remaining - l2_gas_remaining') = 0;
//#[DA_GAS_NO_DECREMENT_FAKE_ROW]
//is_fake_row * (da_gas_remaining - da_gas_remaining') = 0;

Comment on lines 66 to 71

@dbanks12 dbanks12 Dec 17, 2024

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The concept of "fake rows" is now reused for rows that halt (for any reason). Rows that halt have a jump in gas as they return to the parent's gas with the nested call's used gas consumed.

// Constrain that the gas decrements correctly per instruction
#[L2_GAS_REMAINING_DECREMENT_NOT_CALL]
Expand Down
50 changes: 15 additions & 35 deletions barretenberg/cpp/src/barretenberg/vm/avm/generated/relations/gas.hpp
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Expand Up @@ -10,7 +10,7 @@ template <typename FF_> class gasImpl {
public:
using FF = FF_;

static constexpr std::array<size_t, 12> SUBRELATION_PARTIAL_LENGTHS = { 3, 3, 3, 3, 3, 3, 5, 5, 4, 4, 2, 2 };
static constexpr std::array<size_t, 10> SUBRELATION_PARTIAL_LENGTHS = { 3, 3, 3, 3, 5, 5, 4, 4, 2, 2 };

template <typename ContainerOverSubrelations, typename AllEntities>
void static accumulate(ContainerOverSubrelations& evals,
Expand Down Expand Up @@ -46,67 +46,53 @@ template <typename FF_> class gasImpl {
}
{
using Accumulator = typename std::tuple_element_t<4, ContainerOverSubrelations>;
auto tmp =
(new_term.main_is_fake_row * (new_term.main_l2_gas_remaining - new_term.main_l2_gas_remaining_shift));
tmp *= scaling_factor;
std::get<4>(evals) += typename Accumulator::View(tmp);
}
{
using Accumulator = typename std::tuple_element_t<5, ContainerOverSubrelations>;
auto tmp =
(new_term.main_is_fake_row * (new_term.main_da_gas_remaining - new_term.main_da_gas_remaining_shift));
tmp *= scaling_factor;
std::get<5>(evals) += typename Accumulator::View(tmp);
}
{
using Accumulator = typename std::tuple_element_t<6, ContainerOverSubrelations>;
auto tmp = ((new_term.main_is_gas_accounted *
((FF(1) - new_term.main_sel_op_external_call) - new_term.main_sel_op_static_call)) *
(((new_term.main_l2_gas_remaining_shift - new_term.main_l2_gas_remaining) +
new_term.main_base_l2_gas_op_cost) +
(new_term.main_dyn_l2_gas_op_cost * new_term.main_dyn_gas_multiplier)));
tmp *= scaling_factor;
std::get<6>(evals) += typename Accumulator::View(tmp);
std::get<4>(evals) += typename Accumulator::View(tmp);
}
{
using Accumulator = typename std::tuple_element_t<7, ContainerOverSubrelations>;
using Accumulator = typename std::tuple_element_t<5, ContainerOverSubrelations>;
auto tmp = ((new_term.main_is_gas_accounted *
((FF(1) - new_term.main_sel_op_external_call) - new_term.main_sel_op_static_call)) *
(((new_term.main_da_gas_remaining_shift - new_term.main_da_gas_remaining) +
new_term.main_base_da_gas_op_cost) +
(new_term.main_dyn_da_gas_op_cost * new_term.main_dyn_gas_multiplier)));
tmp *= scaling_factor;
std::get<7>(evals) += typename Accumulator::View(tmp);
std::get<5>(evals) += typename Accumulator::View(tmp);
}
{
using Accumulator = typename std::tuple_element_t<8, ContainerOverSubrelations>;
using Accumulator = typename std::tuple_element_t<6, ContainerOverSubrelations>;
auto tmp = (new_term.main_is_gas_accounted *
(((FF(1) - (FF(2) * new_term.main_l2_out_of_gas)) * new_term.main_l2_gas_remaining_shift) -
new_term.main_abs_l2_rem_gas));
tmp *= scaling_factor;
std::get<8>(evals) += typename Accumulator::View(tmp);
std::get<6>(evals) += typename Accumulator::View(tmp);
}
{
using Accumulator = typename std::tuple_element_t<9, ContainerOverSubrelations>;
using Accumulator = typename std::tuple_element_t<7, ContainerOverSubrelations>;
auto tmp = (new_term.main_is_gas_accounted *
(((FF(1) - (FF(2) * new_term.main_da_out_of_gas)) * new_term.main_da_gas_remaining_shift) -
new_term.main_abs_da_rem_gas));
tmp *= scaling_factor;
std::get<9>(evals) += typename Accumulator::View(tmp);
std::get<7>(evals) += typename Accumulator::View(tmp);
}
{
using Accumulator = typename std::tuple_element_t<10, ContainerOverSubrelations>;
using Accumulator = typename std::tuple_element_t<8, ContainerOverSubrelations>;
auto tmp = (new_term.main_abs_l2_rem_gas -
(new_term.main_l2_gas_u16_r0 + (new_term.main_l2_gas_u16_r1 * FF(65536))));
tmp *= scaling_factor;
std::get<10>(evals) += typename Accumulator::View(tmp);
std::get<8>(evals) += typename Accumulator::View(tmp);
}
{
using Accumulator = typename std::tuple_element_t<11, ContainerOverSubrelations>;
using Accumulator = typename std::tuple_element_t<9, ContainerOverSubrelations>;
auto tmp = (new_term.main_abs_da_rem_gas -
(new_term.main_da_gas_u16_r0 + (new_term.main_da_gas_u16_r1 * FF(65536))));
tmp *= scaling_factor;
std::get<11>(evals) += typename Accumulator::View(tmp);
std::get<9>(evals) += typename Accumulator::View(tmp);
}
}
};
Expand All @@ -121,23 +107,17 @@ template <typename FF> class gas : public Relation<gasImpl<FF>> {
case 0:
return "IS_GAS_ACCOUNTED";
case 4:
return "L2_GAS_NO_DECREMENT_FAKE_ROW";
case 5:
return "DA_GAS_NO_DECREMENT_FAKE_ROW";
case 6:
return "L2_GAS_REMAINING_DECREMENT_NOT_CALL";
case 7:
case 5:
return "DA_GAS_REMAINING_DECREMENT_NOT_CALL";
}
return std::to_string(index);
}

// Subrelation indices constants, to be used in tests.
static constexpr size_t SR_IS_GAS_ACCOUNTED = 0;
static constexpr size_t SR_L2_GAS_NO_DECREMENT_FAKE_ROW = 4;
static constexpr size_t SR_DA_GAS_NO_DECREMENT_FAKE_ROW = 5;
static constexpr size_t SR_L2_GAS_REMAINING_DECREMENT_NOT_CALL = 6;
static constexpr size_t SR_DA_GAS_REMAINING_DECREMENT_NOT_CALL = 7;
static constexpr size_t SR_L2_GAS_REMAINING_DECREMENT_NOT_CALL = 4;
static constexpr size_t SR_DA_GAS_REMAINING_DECREMENT_NOT_CALL = 5;
};

} // namespace bb::avm
6 changes: 4 additions & 2 deletions barretenberg/cpp/src/barretenberg/vm/avm/tests/arithmetic.test.cpp
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Expand Up @@ -227,8 +227,10 @@ class AvmArithmeticTests : public ::testing::Test {
.nested_returndata = {},
.last_pc = 0,
.success_offset = 0,
.l2_gas = 0,
.da_gas = 0,
.start_l2_gas_left = 0,
.start_da_gas_left = 0,
.l2_gas_left = 0,
.da_gas_left = 0,
.internal_return_ptr_stack = {} });
trace_builder.current_ext_call_ctx = ext_call_ctx;
}
Expand Down
12 changes: 8 additions & 4 deletions barretenberg/cpp/src/barretenberg/vm/avm/tests/cast.test.cpp
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Expand Up @@ -193,8 +193,10 @@ TEST_F(AvmCastTests, truncationFFToU16ModMinus1)
.nested_returndata = {},
.last_pc = 0,
.success_offset = 0,
.l2_gas = 0,
.da_gas = 0,
.start_l2_gas_left = 0,
.start_da_gas_left = 0,
.l2_gas_left = 0,
.da_gas_left = 0,
.internal_return_ptr_stack = {} });
trace_builder.current_ext_call_ctx = ext_call_ctx;
trace_builder.op_set(0, 0, 0, AvmMemoryTag::U32);
Expand Down Expand Up @@ -222,8 +224,10 @@ TEST_F(AvmCastTests, truncationFFToU16ModMinus2)
.nested_returndata = {},
.last_pc = 0,
.success_offset = 0,
.l2_gas = 0,
.da_gas = 0,
.start_l2_gas_left = 0,
.start_da_gas_left = 0,
.l2_gas_left = 0,
.da_gas_left = 0,
.internal_return_ptr_stack = {} });
trace_builder.current_ext_call_ctx = ext_call_ctx;

Expand Down
6 changes: 4 additions & 2 deletions barretenberg/cpp/src/barretenberg/vm/avm/tests/slice.test.cpp
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Expand Up @@ -37,8 +37,10 @@ class AvmSliceTests : public ::testing::Test {
.nested_returndata = {},
.last_pc = 0,
.success_offset = 0,
.l2_gas = 0,
.da_gas = 0,
.start_l2_gas_left = 0,
.start_da_gas_left = 0,
.l2_gas_left = 0,
.da_gas_left = 0,
.internal_return_ptr_stack = {} });
trace_builder.current_ext_call_ctx = ext_call_ctx;
this->calldata = calldata;
Expand Down
1 change: 1 addition & 0 deletions barretenberg/cpp/src/barretenberg/vm/avm/trace/errors.hpp
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Expand Up @@ -20,6 +20,7 @@ enum class AvmError : uint32_t {
RADIX_OUT_OF_BOUNDS,
DUPLICATE_NULLIFIER,
SIDE_EFFECT_LIMIT_REACHED,
OUT_OF_GAS,
};

} // namespace bb::avm_trace
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