I can reproduce the issue with cmake and see the debugger indicating the
illegal instruction occurs in cmake when trying to memset() an 8 aligned
buffer.
The following also does a memset() on an 8 aligned buffer but does not
crash:
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#define OFFSET 0x8
int main(void) {
printf("Starting test\n");
size_t alignment = 128;
size_t size = 1024;
char *ptr = NULL;
char *new_ptr;
ptr = aligned_alloc(alignment, size);
if (ptr == NULL) {
fprintf(stderr, "Memory allocation failed\n");
return EXIT_FAILURE;
}
new_ptr = ptr + OFFSET;
memset(new_ptr, 0xff, size - OFFSET);
free(ptr);
return EXIT_SUCCESS;
}
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https://bugs.launchpad.net/bugs/2133188
Title:
Illegal instruction in memset under qemu-user for riscv64
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