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retry with mmap when mremap fails

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This commit is contained in:
notaz 2017-10-06 01:23:03 +03:00
parent e7f580052c
commit 448ec62f85
1 changed files with 12 additions and 2 deletions
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14
linux/plat.c
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@ -216,8 +216,18 @@ void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
void *ret; void *ret;
ret = mremap(ptr, oldsize, newsize, MREMAP_MAYMOVE); ret = mremap(ptr, oldsize, newsize, MREMAP_MAYMOVE);
if (ret == MAP_FAILED) if (ret == MAP_FAILED) {
return NULL; fprintf(stderr, "mremap %p %zd %zd: ",
ptr, oldsize, newsize);
perror(NULL);
// might be because huge pages can't be remapped,
// just make a new mapping
ret = plat_mmap(0, newsize, 0, 0);
if (ret == MAP_FAILED)
return NULL;
memcpy(ret, ptr, oldsize);
munmap(ptr, oldsize);
}
if (ret != ptr) if (ret != ptr)
printf("warning: mremap moved: %p -> %p\n", ptr, ret); printf("warning: mremap moved: %p -> %p\n", ptr, ret);