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name anonymous mmap address ranges

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This commit is contained in:
Alex Zhukov 2025-03-10 13:57:46 -07:00
parent 2fc6b14bab
commit c675fd7f57
1 changed files with 9 additions and 2 deletions
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11
src/prim/unix/prim.c
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@ -217,7 +217,10 @@ static void* unix_mmap_prim(void* addr, size_t size, size_t try_alignment, int p
int err = errno; int err = errno;
_mi_trace_message("unable to directly request aligned OS memory (error: %d (0x%x), size: 0x%zx bytes, alignment: 0x%zx, hint address: %p)\n", err, err, size, try_alignment, addr); _mi_trace_message("unable to directly request aligned OS memory (error: %d (0x%x), size: 0x%zx bytes, alignment: 0x%zx, hint address: %p)\n", err, err, size, try_alignment, addr);
} }
if (p!=MAP_FAILED) return p; if (p!=MAP_FAILED) {
prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, p, size, "mimalloc");
return p;
}
// fall back to regular mmap // fall back to regular mmap
} }
} }
@ -242,13 +245,17 @@ static void* unix_mmap_prim(void* addr, size_t size, size_t try_alignment, int p
#endif #endif
_mi_trace_message("unable to directly request hinted aligned OS memory (error: %d (0x%x), size: 0x%zx bytes, alignment: 0x%zx, hint address: %p)\n", err, err, size, try_alignment, hint); _mi_trace_message("unable to directly request hinted aligned OS memory (error: %d (0x%x), size: 0x%zx bytes, alignment: 0x%zx, hint address: %p)\n", err, err, size, try_alignment, hint);
} }
if (p!=MAP_FAILED) return p; if (p!=MAP_FAILED) {
prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, p, size, "mimalloc");
return p;
}
// fall back to regular mmap // fall back to regular mmap
} }
} }
#endif #endif
// regular mmap // regular mmap
p = mmap(addr, size, protect_flags, flags, fd, 0); p = mmap(addr, size, protect_flags, flags, fd, 0);
prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, p, size, "mimalloc");
if (p!=MAP_FAILED) return p; if (p!=MAP_FAILED) return p;
// failed to allocate // failed to allocate
return NULL; return NULL;