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Update dlmalloc dependency of libstd #144364

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Jul 26, 2025
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Update dlmalloc dependency of libstd #144364

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Update dlmalloc dependency of libstd 
This primarily pulls in alexcrichton/dlmalloc-rs/55 and
alexcrichton/dlmalloc-rs/54 to address 144199. Notably the highest byte
in the wasm address space is no longer allocatable and additionally the
allocator internally uses `wrapping_add` instead of `add` on pointers
since on 32-bit platforms offsets might be larger than half the address
space.
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@alexcrichton
alexcrichton committed Jul 23, 2025
commit 93d2003c9a4a35522b3528a4df638dd4e315bd14
4 changes: 2 additions & 2 deletions library/Cargo.lock
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Expand Up @@ -78,9 +78,9 @@ dependencies = [

[[package]]
name = "dlmalloc"
version = "0.2.9"
version = "0.2.10"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d01597dde41c0b9da50d5f8c219023d63d8f27f39a27095070fd191fddc83891"
checksum = "fa3a2dbee57b69fbb5dbe852fa9c0925697fb0c7fbcb1593e90e5ffaedf13d51"
dependencies = [
"cfg-if",
"libc",
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2 changes: 1 addition & 1 deletion library/std/Cargo.toml
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Expand Up @@ -63,7 +63,7 @@ rand = { version = "0.9.0", default-features = false, features = ["alloc"] }
rand_xorshift = "0.4.0"

[target.'cfg(any(all(target_family = "wasm", target_os = "unknown"), target_os = "xous", all(target_vendor = "fortanix", target_env = "sgx")))'.dependencies]
dlmalloc = { version = "0.2.4", features = ['rustc-dep-of-std'] }
dlmalloc = { version = "0.2.10", features = ['rustc-dep-of-std'] }

[target.x86_64-fortanix-unknown-sgx.dependencies]
fortanix-sgx-abi = { version = "0.5.0", features = [
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