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switch to the new storage API (#396)

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This PR switches to the new `get_storage_or_zero` and
`set_storage_or_clear` syscalls which are more tailored towards
Solidity.

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
This commit is contained in:
xermicus
2025-10-30 14:13:37 +01:00
committed by GitHub
parent 42cac55be8
commit 84018c18ae
5 changed files with 20 additions and 38 deletions
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crates/llvm-context/src/polkavm/context/pointer/storage.rs
+10 -25
View File
@@ -157,6 +157,10 @@ fn emit_load<'ctx>(
key: BasicValueEnum<'ctx>,
transient: bool,
) -> anyhow::Result<BasicValueEnum<'ctx>> {
let is_transient = context.xlen_type().const_int(transient as u64, false);
let key_pointer = context.build_alloca_at_entry(context.word_type(), "key_pointer");
let value_pointer = context.build_alloca_at_entry(context.word_type(), "value_pointer");
let mut key = context.build_load(
super::Pointer::new(
context.word_type(),
@@ -168,33 +172,17 @@ fn emit_load<'ctx>(
if !transient {
key = context.build_byte_swap(key)?;
}
let key_pointer = context.build_alloca_at_entry(context.word_type(), "key_pointer");
let value_pointer = context.build_alloca_at_entry(context.word_type(), "value_pointer");
let length_pointer = context.build_alloca_at_entry(context.xlen_type(), "length_pointer");
context.builder().build_store(key_pointer.value, key)?;
context.build_store(value_pointer, context.word_const(0))?;
context.build_store(
length_pointer,
context
.xlen_type()
.const_int(revive_common::BYTE_LENGTH_WORD as u64, false),
)?;
let is_transient = context.xlen_type().const_int(transient as u64, false);
let arguments = [
is_transient.into(),
key_pointer.to_int(context).into(),
context.xlen_type().const_all_ones().into(),
value_pointer.to_int(context).into(),
length_pointer.to_int(context).into(),
];
context.build_runtime_call(revive_runtime_api::polkavm_imports::GET_STORAGE, &arguments);
// We do not to check the return value: Solidity assumes infallible loads.
// If a key doesn't exist the "zero" value is returned (ensured by above write).
// If a key doesn't exist the syscall returns zero.
let value = context.build_load(value_pointer, "storage_value")?;
Ok(if transient {
@@ -210,6 +198,10 @@ fn emit_store<'ctx>(
value: BasicValueEnum<'ctx>,
transient: bool,
) -> anyhow::Result<()> {
let is_transient = context.xlen_type().const_int(transient as u64, false);
let key_pointer = context.build_alloca_at_entry(context.word_type(), "key_pointer");
let value_pointer = context.build_alloca_at_entry(context.word_type(), "value_pointer");
let mut key = context.build_load(
super::Pointer::new(
context.word_type(),
@@ -224,27 +216,20 @@ fn emit_store<'ctx>(
Default::default(),
value.into_pointer_value(),
),
"key",
"value",
)?;
if !transient {
key = context.build_byte_swap(key)?;
value = context.build_byte_swap(value)?;
}
let key_pointer = context.build_alloca_at_entry(context.word_type(), "key_pointer");
let value_pointer = context.build_alloca_at_entry(context.word_type(), "value_pointer");
context.build_store(key_pointer, key)?;
context.build_store(value_pointer, value)?;
let is_transient = context.xlen_type().const_int(transient as u64, false);
let arguments = [
is_transient.into(),
key_pointer.to_int(context).into(),
context.xlen_type().const_all_ones().into(),
value_pointer.to_int(context).into(),
context.integer_const(crate::polkavm::XLEN, 32).into(),
];
context.build_runtime_call(revive_runtime_api::polkavm_imports::SET_STORAGE, &arguments);