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This commit is contained in:
Calvin Rose
2026-10-10 13:21:42 -05:00
parent af2471cefb
commit b7e32da0aa
2 changed files with 8 additions and 8 deletions
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src/core/ffi.c
+5 -5
View File
@@ -1231,16 +1231,16 @@ static Janet janet_ffi_sysv64(JanetFFISignature *signature, void *function_point
ret_mem = alloca(type_size(signature->ret.type));
regs[0] = (uint64_t) ret_mem;
}
/* GCC aligns alloca to the widest allowed vector type (32 bytes for AVX) which can pad
* between the stack pointer and this block, but stack args start at the stack pointer,
* so we must ask for the calling convention's 16 byte alignment */
/* Both GCC and CLANG define GNUC. */
/* GCC aligns alloca to the widest allowed vector type (32 bytes for AVX) which can pad
* between the stack pointer and this block, but stack args start at the stack pointer,
* so we must ask for the calling convention's 16 byte alignment */
/* Both GCC and CLANG define GNUC. */
#if defined(__GNUC__)
uint64_t *stack = __builtin_alloca_with_align(sizeof(uint64_t) * signature->stack_count, 128);
#else
uint64_t *stack = alloca(sizeof(uint64_t) * signature->stack_count);
#endif
/* x32 pointers fill only the low half of a slot and must be zero-extended */
/* x32 pointers fill only the low half of a slot and must be zero-extended */
#ifdef __ILP32__
memset(stack, 0, sizeof(uint64_t) * signature->stack_count);
#endif
test/fuzzers/fuzz_fiber.c
+3 -3
View File
@@ -22,7 +22,7 @@ static Janet cfun_fuzz_fiber(int32_t argc, Janet *argv) {
if (definition->bytecode_length <= 0) breakpoint_count = 0;
for (int32_t index = 0; index < breakpoint_count; index++) {
int32_t offset = ((breakpoint_control >> 4) +
index * (breakpoint_control >> 8)) % definition->bytecode_length;
index * (breakpoint_control >> 8)) % definition->bytecode_length;
if (index == 0 && (breakpoint_control & 4)) offset = 0;
breakpoints[index] = offset;
janet_debug_break(definition, offset);
@@ -49,7 +49,7 @@ static Janet cfun_fuzz_fiber(int32_t argc, Janet *argv) {
status == JANET_STATUS_ERROR ||
status == JANET_STATUS_ALIVE ||
(status != JANET_STATUS_PENDING &&
status != JANET_STATUS_DEBUG)) {
status != JANET_STATUS_DEBUG)) {
break;
}
@@ -100,7 +100,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
int32_t step_budget = 8 + ((data[0] >> 2) & 31);
int32_t control = ((data[0] >> 7) & 1) |
(((data[0] >> 4) & 3) << 1);
(((data[0] >> 4) & 3) << 1);
int32_t breakpoint_control = data[1] | ((int32_t)data[size - 1] << 8);
written = snprintf(source + source_length,
sizeof(source) - source_length,