status-im
/
evmc
mirror of https://github.com/status-im/evmc.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

EVM-C: Simplify set_storage callback

This commit is contained in:
Paweł Bylica 2017-06-08 12:00:04 +02:00
parent cde8027511
commit 06b25bf87d
3 changed files with 23 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
examples/capi.c
View File

@ -42,13 +42,12 @@ static void query(union evm_variant* result,
}
}
static void update(struct evm_env* env,
enum evm_update_key key,
const struct evm_uint160be* addr,
const union evm_variant* arg1,
const union evm_variant* arg2)
static void set_storage(struct evm_env* env,
const struct evm_uint160be* addr,
const struct evm_uint256be* key,
const struct evm_uint256be* value)
{
printf("EVM-C: UPDATE %d\n", key);
printf("EVM-C: SSTORE");
}
static void call(struct evm_result* result,
@ -76,7 +75,7 @@ int main(int argc, char *argv[]) {
if (factory.abi_version != EVM_ABI_VERSION)
return 1; // Incompatible ABI version.
struct evm_instance* jit = factory.create(query, update, NULL, call,
struct evm_instance* jit = factory.create(query, set_storage, NULL, call,
get_tx_context, get_block_hash,
NULL);

10
examples/examplevm.c
View File

@ -8,7 +8,7 @@ struct examplevm
{
struct evm_instance instance;
evm_query_state_fn query_fn;
evm_update_state_fn update_fn;
evm_set_storage_fn set_storage_fn;
evm_call_fn call_fn;
evm_get_tx_context_fn get_tx_context_fn;
evm_get_block_hash_fn get_block_hash_fn;
@ -102,9 +102,7 @@ static struct evm_result execute(struct evm_instance* instance,
const struct evm_uint256be index = {{0,}};
vm->query_fn(&value, env, EVM_SLOAD, &msg->address, &index);
value.uint256be.bytes[31] += 1;
union evm_variant arg;
arg.uint256be = index;
vm->update_fn(env, EVM_SSTORE, &msg->address, &arg, &value);
vm->set_storage_fn(env, &msg->address, &index, &value.uint256be);
ret.code = EVM_SUCCESS;
return ret;
}
@ -117,7 +115,7 @@ static struct evm_result execute(struct evm_instance* instance,
}
static struct evm_instance* evm_create(evm_query_state_fn query_fn,
evm_update_state_fn update_fn,
evm_set_storage_fn update_fn,
evm_selfdestruct_fn selfdestruct_fn,
evm_call_fn call_fn,
evm_get_tx_context_fn get_tx_context_fn,
@ -130,7 +128,7 @@ static struct evm_instance* evm_create(evm_query_state_fn query_fn,
interface->execute = execute;
interface->set_option = evm_set_option;
vm->query_fn = query_fn;
vm->update_fn = update_fn;
vm->set_storage_fn = update_fn;
vm->call_fn = call_fn;
vm->get_tx_context_fn = get_tx_context_fn;
vm->get_block_hash_fn = get_block_hash_fn;

37
include/evm.h
View File

@ -270,30 +270,19 @@ typedef void (*evm_query_state_fn)(union evm_variant* result,
const struct evm_uint160be* address,
const struct evm_uint256be* storage_key);
/// The update callback key.
enum evm_update_key {
EVM_SSTORE = 0, ///< Update storage entry
};
/// Update callback function.
/// Set storage callback function.
///
/// This callback function is used by the EVM to modify contract state in the
/// host application.
/// @param env Pointer to execution environment managed by the host
/// application.
/// @param key The kind of the update. See evm_update_key and details below.
///
/// ## Kinds of updates
///
/// - ::EVM_SSTORE
/// @param arg1 evm_variant::uint256be The index of the storage entry.
/// @param arg2 evm_variant::uint256be The value to be stored.
typedef void (*evm_update_state_fn)(struct evm_env* env,
enum evm_update_key key,
const struct evm_uint160be* address,
const union evm_variant* arg1,
const union evm_variant* arg2);
/// This callback function is used by an EVM to update the given contract
/// storage entry
/// @param env Pointer to execution environment managed by the host
/// application.
/// @param address The address of the contract.
/// @param key The index of the storage entry.
/// @param value The value to be stored.
typedef void (*evm_set_storage_fn)(struct evm_env* env,
const struct evm_uint160be* address,
const struct evm_uint256be* key,
const struct evm_uint256be* value);
/// Selfdestruct callback function.
///
@ -351,7 +340,7 @@ struct evm_instance; ///< Forward declaration.
/// @param get_block_hash_fn Pointer to get block hash function. Nonnull.
/// @return Pointer to the created EVM instance.
typedef struct evm_instance* (*evm_create_fn)(evm_query_state_fn query_fn,
evm_update_state_fn update_fn,
evm_set_storage_fn update_fn,
evm_selfdestruct_fn selfdestruct_fn,
evm_call_fn call_fn,
evm_get_tx_context_fn get_tx_context_fn,