819e3394c9
The object header string is meant to record the relevant toolchain configuration, so that we don't import or link object files that are incompatible with each other. One important part of compatibility is the sub-architecture version (GOARM for GOARCH=arm, and so on). Add the sub-architecture info to the object header line so that binaries cannot be built that have inconsistent sub-architecture configurations across the build. This check is only important when the build system makes a mistake. Builds using the go command don't make this kind of mistake anymore, but we just debugged a difficult problem inside Google where a custom build system had built part of a program with GOARM=5 and part of a program with GOARM=7, resulting in corrupted execution when signal-based preemption was attempted. Updating the check will avoid this kind of problem in the future, in any custom build system, or if the go command makes a mistake. After this change: % sed 3q pkg/darwin_amd64/runtime.a !<arch> __.PKGDEF 0 0 0 644 30525 ` go object darwin amd64 devel go1.20-102ebe10b7 Wed Aug 17 14:31:01 2022 -0400 GOAMD64=v1 X:regabiwrappers,regabiargs % Change-Id: I901e0758f1002dd2c58292dc65e2d06da86e4495 Reviewed-on: https://go-review.googlesource.com/c/go/+/427174 Run-TryBot: Russ Cox <rsc@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Auto-Submit: Russ Cox <rsc@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> |
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The Go Programming Language
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