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xo-alloc2: add guard-byte spans to AllocInfo

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This commit is contained in:
Roland Conybeare 2025-12-16 21:43:51 -05:00
commit 5a5de795c1
8 changed files with 231 additions and 175 deletions
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15
xo-alloc2/src/alloc2/DArena.cpp
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@ -168,7 +168,8 @@ namespace xo {
//retval.checkpoint_ = lo_;
/** make sure guard size is aligned **/
config_.guard_z_ = padding::with_padding(config_.guard_z_);
config_.header_.guard_z_
= padding::with_padding(config_.header_.guard_z_);
}
DArena::DArena(DArena && other) {
@ -272,7 +273,17 @@ namespace xo {
this->reserved());
}
return AllocInfo(&config_.header_, (AllocHeader *)header_mem);
AllocHeader * header = (AllocHeader *)header_mem;
const byte * guard_lo
= header_mem - config_.header_.guard_z_;
const byte * guard_hi
= mem + config_.header_.size(*header);
return AllocInfo(&config_.header_,
guard_lo,
(AllocHeader *)header_mem,
guard_hi);
}
void