implement the code size opcodes (#107)

Cargo.toml

@@ -67,7 +67,7 @@ log = { version = "0.4" }
 # polkadot-sdk and friends
 codec = { version = "3.6.12", default-features = false, package = "parity-scale-codec" }
 scale-info = { version = "2.11.1", default-features = false }
-polkadot-sdk = { git = "https://github.com/paritytech/polkadot-sdk", rev = "db40a66db71e8e7fe943dda5cd0e28078efa2a19" }
+polkadot-sdk = { git = "https://github.com/paritytech/polkadot-sdk", rev = "2b6b69641ccff4d7aa9c32051bbb2f1e775ef8cc" }
 
 # llvm
 [workspace.dependencies.inkwell]

crates/integration/contracts/ERC20.sol

@@ -105,9 +105,7 @@ contract ERC20Tester {
         ERC20 token = new ERC20();
         assert(token.decimals() == 18);
 
-        // use call directly when code_size is implemented on pallet-revive
-
-        address(token).call(abi.encodeWithSignature("mint(uint256)", 300));
+        token.mint(300);
         assert(token.balanceOf(address(this)) == 300);
         token.transfer(BOB, 100);
         assert(token.balanceOf(address(this)) == 200);
@@ -119,7 +117,7 @@ contract ERC20Tester {
         assert(token.balanceOf(BOB) == 200);
         assert(token.balanceOf(address(this)) == 100);
 
-        address(token).call(abi.encodeWithSignature("burn(uint256)", 100));
+        token.burn(100);
         assert(token.balanceOf(address(this)) == 0);
     }
-}
+}

crates/integration/src/tests.rs

@@ -321,6 +321,114 @@ fn ext_code_hash() {
     .run();
 }
 
+#[test]
+fn ext_code_size() {
+    let alice = Address::from(ALICE.0);
+    let own_address = alice.create(0);
+    let baseline_address = alice.create2([0u8; 32], keccak256(Contract::baseline().pvm_runtime));
+
+    let own_code_size = U256::from(
+        Contract::ext_code_size(Default::default())
+            .pvm_runtime
+            .len(),
+    );
+    let baseline_code_size = U256::from(Contract::baseline().pvm_runtime.len());
+
+    Specs {
+        actions: vec![
+            // Instantiate the test contract
+            instantiate("contracts/ExtCode.sol", "ExtCode").remove(0),
+            // Instantiate the baseline contract
+            Instantiate {
+                origin: TestAddress::Alice,
+                value: 0,
+                gas_limit: Some(GAS_LIMIT),
+                storage_deposit_limit: None,
+                code: Code::Solidity {
+                    path: Some("contracts/Baseline.sol".into()),
+                    contract: "Baseline".to_string(),
+                    solc_optimizer: None,
+                    pipeline: None,
+                },
+                data: vec![],
+                salt: OptionalHex::from([0; 32]),
+            },
+            // Alice is not a contract and returns a code size of 0
+            Call {
+                origin: TestAddress::Alice,
+                dest: TestAddress::Instantiated(0),
+                value: 0,
+                gas_limit: None,
+                storage_deposit_limit: None,
+                data: Contract::ext_code_size(alice).calldata,
+            },
+            VerifyCall(VerifyCallExpectation {
+                success: true,
+                output: OptionalHex::from([0u8; 32].to_vec()),
+                gas_consumed: None,
+            }),
+            // Unknown address returns a code size of 0
+            Call {
+                origin: TestAddress::Alice,
+                dest: TestAddress::Instantiated(0),
+                value: 0,
+                gas_limit: None,
+                storage_deposit_limit: None,
+                data: Contract::ext_code_size(Address::from([0xff; 20])).calldata,
+            },
+            VerifyCall(VerifyCallExpectation {
+                success: true,
+                output: OptionalHex::from([0u8; 32].to_vec()),
+                gas_consumed: None,
+            }),
+            // Own address via extcodesize returns own code size
+            Call {
+                origin: TestAddress::Alice,
+                dest: TestAddress::Instantiated(0),
+                value: 0,
+                gas_limit: None,
+                storage_deposit_limit: None,
+                data: Contract::ext_code_size(own_address).calldata,
+            },
+            VerifyCall(VerifyCallExpectation {
+                success: true,
+                output: OptionalHex::from(own_code_size.to_be_bytes::<32>().to_vec()),
+                gas_consumed: None,
+            }),
+            // Own address via codesize returns own code size
+            Call {
+                origin: TestAddress::Alice,
+                dest: TestAddress::Instantiated(0),
+                value: 0,
+                gas_limit: None,
+                storage_deposit_limit: None,
+                data: Contract::code_size().calldata,
+            },
+            VerifyCall(VerifyCallExpectation {
+                success: true,
+                output: OptionalHex::from(own_code_size.to_be_bytes::<32>().to_vec()),
+                gas_consumed: None,
+            }),
+            // Baseline address returns the baseline code size
+            Call {
+                origin: TestAddress::Alice,
+                dest: TestAddress::Instantiated(0),
+                value: 0,
+                gas_limit: None,
+                storage_deposit_limit: None,
+                data: Contract::ext_code_size(baseline_address).calldata,
+            },
+            VerifyCall(VerifyCallExpectation {
+                success: true,
+                output: OptionalHex::from(baseline_code_size.to_be_bytes::<32>().to_vec()),
+                gas_consumed: None,
+            }),
+        ],
+        ..Default::default()
+    }
+    .run();
+}
+
 /*
 // These test were implement for the mock-runtime and need to be ported yet.
 
@@ -349,28 +457,4 @@ fn create2_failure() {
 
     assert_eq!(output.flags, ReturnFlags::Revert);
 }
-
-#[test]
-fn ext_code_size() {
-    let contract = Contract::ext_code_size(Transaction::default_address());
-    let (_, output) = assert_success(&contract, false);
-    let received = U256::from_be_slice(&output.data);
-    let expected = U256::from(contract.pvm_runtime.len());
-    assert_eq!(received, expected);
-
-    let contract = Contract::ext_code_size(Default::default());
-    let (_, output) = assert_success(&contract, false);
-    let received = U256::from_be_slice(&output.data);
-    let expected = U256::ZERO;
-    assert_eq!(received, expected);
-}
-
-#[test]
-fn code_size() {
-    let contract = Contract::code_size();
-    let (_, output) = assert_success(&contract, false);
-    let expected = U256::from(contract.pvm_runtime.len());
-    let received = U256::from_be_slice(&output.data);
-    assert_eq!(expected, received);
-}
 */

crates/llvm-context/src/polkavm/evm/ext_code.rs

@@ -1,7 +1,5 @@
 //! Translates the external code operations.
 
-use inkwell::values::BasicValue;
-
 use crate::polkavm::context::Context;
 use crate::polkavm::Dependency;
 
@@ -14,37 +12,23 @@ pub fn size<'ctx, D>(
 where
     D: Dependency + Clone,
 {
-    let address_pointer = match address {
-        Some(address) => {
-            let address_pointer = context.build_alloca(context.word_type(), "value");
-            context.build_store(address_pointer, address)?;
-            address_pointer
-        }
-        None => context.sentinel_pointer(),
+    let address = match address {
+        Some(address) => address,
+        None => super::context::address(context)?.into_int_value(),
     };
 
-    let address_pointer_casted = context.builder().build_ptr_to_int(
-        address_pointer.value,
-        context.xlen_type(),
-        "address_pointer",
-    )?;
-    let value = context
-        .build_runtime_call(
-            revive_runtime_api::polkavm_imports::CODE_SIZE,
-            &[address_pointer_casted.into()],
-        )
-        .unwrap_or_else(|| {
-            panic!(
-                "{} should return a value",
-                revive_runtime_api::polkavm_imports::CODE_SIZE
-            )
-        })
-        .into_int_value();
+    let address_pointer = context.build_address_argument_store(address)?;
+    let output_pointer = context.build_alloca_at_entry(context.word_type(), "output_pointer");
 
-    Ok(context
-        .builder()
-        .build_int_z_extend(value, context.word_type(), "extcodesize")?
-        .as_basic_value_enum())
+    context.build_runtime_call(
+        revive_runtime_api::polkavm_imports::CODE_SIZE,
+        &[
+            address_pointer.to_int(context).into(),
+            output_pointer.to_int(context).into(),
+        ],
+    );
+
+    context.build_load(output_pointer, "code_size")
 }
 
 /// Translates the `extcodehash` instruction.

crates/runtime-api/src/polkavm_imports.c

@@ -78,7 +78,7 @@ POLKAVM_IMPORT(void, caller, uint32_t)
 
 POLKAVM_IMPORT(void, chain_id, uint32_t)
 
-POLKAVM_IMPORT(uint32_t, code_size, uint32_t)
+POLKAVM_IMPORT(uint32_t, code_size, uint32_t, uint32_t)
 
 POLKAVM_IMPORT(void, code_hash, uint32_t, uint32_t)