go/src/runtime, branch makepkg

all: prealloc slice with possible minimum capabilities

2026-02-03T11:04:30Z

internal/maps,cmd/compile/internal/walk: replace calls to mapaccess1* with mapaccess2*

2026-02-02T21:24:26Z

mapaccess1* and mapaccess2* functions share the same implementation and differ only in whether the boolean "found" is returned. This change replaces mapaccess1* calls with mapaccess2*. We can do this transparently, since the call site can safely discard the second (boolean) result. Ideally, mapacces1* functions could be removed entirely, but this change keeps them as thin wrappers for compatibility. Fixes #73196 Change-Id: I07c3423d22ed1095ac3666d00e134c2747b2f9c1 Reviewed-on: https://go-review.googlesource.com/c/go/+/736020 Reviewed-by: Keith Randall Reviewed-by: Michael Pratt Auto-Submit: Keith Randall LUCI-TryBot-Result: Go LUCI Reviewed-by: Keith Randall

runtime: delete unused parameter of userForced

2026-01-31T02:35:34Z

delete unused parameter userForced Change-Id: I71c26ab5e3fadc532b6b1f266212c6f620769efd GitHub-Last-Rev: 6a32c8ff6e63f8b149c0803e8b6636022bd9d066 GitHub-Pull-Request: golang/go#76732 Reviewed-on: https://go-review.googlesource.com/c/go/+/727680 LUCI-TryBot-Result: Go LUCI Reviewed-by: Carlos Amedee Reviewed-by: Michael Knyszek Reviewed-by: Tony Tang

runtime: align end of systemstack_switch prologue on amd64 for consistency with gosave_systemstack_switch

2026-01-30T17:55:05Z

gosave_systemstack_switch saves PC with fixed offset of 8 bytes from systemstack_switch to bypass prologue. This commit makes this offset consistent with actual address of UNDEF instruction intended to be at that address. Fixes #71440 Change-Id: Ibe6458c5bcb0bdaec228a2f13d6aec7ecc0e319e Reviewed-on: https://go-review.googlesource.com/c/go/+/740360 LUCI-TryBot-Result: Go LUCI Auto-Submit: Keith Randall Reviewed-by: Keith Randall Reviewed-by: Keith Randall Reviewed-by: Dmitri Shuralyov

all: switch linux-ppc64 target to ELFv2 ABI

2026-01-30T16:06:41Z

Go is only capable of producing internally linked, static binaries on linux-ppc64. As such, binaries should run in either ELFv1 or ELFv2 ppc64 userspaces today. This opens the door to enabling cgo and external linking which will require ELFv2 support and userspace, eventually. Fixes #76244 Change-Id: I5ca15037cbe546f352e8693dcf14da51a308b8ca Reviewed-on: https://go-review.googlesource.com/c/go/+/734540 LUCI-TryBot-Result: Go LUCI Reviewed-by: Cherry Mui Reviewed-by: Dmitri Shuralyov

runtime: use smaller max align for arm32

2026-01-29T21:04:30Z

Maybe fixes a dashboard build failure for linux/arm32 casued by CL 724261. This value comes from cmd/link/internal/arm/l.go (and in general, maxAlign in cmd/link/internal/$ARCH/.go). Change-Id: I4d02cd41072da1b6ad6c7405044bd7788626b013 Reviewed-on: https://go-review.googlesource.com/c/go/+/740101 LUCI-TryBot-Result: Go LUCI Reviewed-by: Keith Randall Reviewed-by: Ian Lance Taylor Auto-Submit: Keith Randall Reviewed-by: Dmitri Shuralyov

runtime, cmd/link: store type descriptor length, not end

2026-01-29T16:14:53Z

Storing the type descriptor length lets us save a relocation. It also avoids a problem for Darwin dynamic linking. For #6853 Fixes #77350 Change-Id: If5c94330fe10d75690325f3d0b0658060ef3eb2d Reviewed-on: https://go-review.googlesource.com/c/go/+/739681 Reviewed-by: Cherry Mui Reviewed-by: Dmitri Shuralyov LUCI-TryBot-Result: Go LUCI

runtime/metrics: fix panic in Read with empty slice

2026-01-28T16:44:36Z

Calling Read with a nil or empty slice previously caused a panic with "index out of range" because the function unconditionally accessed the first element of the slice (via &m[0]) to pass the pointer to the runtime. This change adds a check for len(m) == 0 to return early, preventing the panic when no samples are provided. Fixes #77231 Change-Id: I442635f5c61de432883c8d0efae9cc6aa1363cc9 GitHub-Last-Rev: 6f24f67b18c77a0b36b92017a3f4ef8aa3aa5229 GitHub-Pull-Request: golang/go#77233 Reviewed-on: https://go-review.googlesource.com/c/go/+/737380 Reviewed-by: Amol Yadav Reviewed-by: Michael Pratt LUCI-TryBot-Result: Go LUCI Auto-Submit: Michael Pratt Commit-Queue: Michael Pratt Reviewed-by: Dmitri Shuralyov

cmd/link, runtime: remove typelinks

2026-01-27T21:47:14Z

Instead of adding a typelinks section to a Go binary, mark the start and end of the typelinked type descriptors. The runtime can then step through the descriptors to find them all, rather than relying on the extra linker-generated offset list. The runtime steps through the type descriptors lazily, as many Go programs don't need the typelinks list at all. This reduces the size of cmd/go by 15K bytes, which isn't much but it's not nothing. A future CL will change the reflect package to use the type pointers directly rather than converting to offsets and then back to type pointers. For #6853 Change-Id: Id0af4ce81c5b1cea899fc92b6ff9d2db8ce4c267 Reviewed-on: https://go-review.googlesource.com/c/go/+/724261 Reviewed-by: Dmitri Shuralyov Reviewed-by: Keith Randall Reviewed-by: Keith Randall LUCI-TryBot-Result: Go LUCI Auto-Submit: Ian Lance Taylor

runtime: rename aeshashbody to runtime.aeshashbody

2026-01-27T16:24:58Z

Currently this is a raw symbol name with no package component, which is confusing when seen in profilers or similar tools. This function does not follow a Go ABI, and thus should not have a Go function declaration. go vet requires declaration for standard assembly functions. CL 176100 removed the package name as part of making vet pass on package runtime, but simply making the function static via the <> suffix is sufficient, there is no need to shorten the symbol name. Change-Id: I6a6a636c6030f1c9a4b8bb330978733bb336b08e Reviewed-on: https://go-review.googlesource.com/c/go/+/738521 LUCI-TryBot-Result: Go LUCI Reviewed-by: Michael Knyszek