pezkuwichain/revive
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allow dynamic configuration of the heap memory (#287)

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This PR changes the implementation of the emulated EVM heap memory:
Instead of linking in a C implementation the code is emitted directly
into the contract module. Which allows making it configurable via a
compiler parameter (a follow up PR to this).

---------

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
This commit is contained in:
xermicus authored and GitHub committed 2025-04-23 20:25:55 +02:00
1 parent f937188991
commit 357bf58868
11 files changed
+216 -66
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crates/runtime-api/src/polkavm_imports.c
-28
View File
@@ -5,34 +5,6 @@
// Missing builtins
#define EVM_WORD_SIZE 32
#define ALIGN(size) ((size + EVM_WORD_SIZE - 1) & ~(EVM_WORD_SIZE - 1))
#define MAX_MEMORY_SIZE (64 * 1024)
char __memory[MAX_MEMORY_SIZE];
uint32_t __memory_size = 0;
void * __sbrk_internal(uint32_t offset, uint32_t size) {
if (offset >= MAX_MEMORY_SIZE || size > MAX_MEMORY_SIZE) {
POLKAVM_TRAP();
}
uint32_t new_size = ALIGN(offset + size);
if (new_size > MAX_MEMORY_SIZE) {
POLKAVM_TRAP();
}
if (new_size > __memory_size) {
__memory_size = new_size;
}
return (void *)&__memory[offset];
}
void * memset(void *b, int c, size_t len) {
uint8_t *dest = b;
while (len-- > 0) *dest++ = c;
return b;
}
void * memcpy(void *dst, const void *_src, size_t len) {
uint8_t *dest = dst;
const uint8_t *src = _src;