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  1. 15 Apr, 2019 3 commits
    • Michael Munday's avatar
      cmd/link, runtime: mark goexit as the top of the call stack · aafe2573
      Michael Munday authored 
      This CL adds a new attribute, TOPFRAME, which can be used to mark
functions that should be treated as being at the top of the call
stack. The function `runtime.goexit` has been marked this way on
architectures that use a link register.

This will stop programs that use DWARF to unwind the call stack
from unwinding past `runtime.goexit` on architectures that use a
link register. For example, it eliminates "corrupt stack?"
warnings when generating a backtrace that hits `runtime.goexit`
in GDB on s390x.

Similar code should be added for non-link-register architectures
(i.e. amd64, 386). They mark the top of the call stack slightly
differently to link register architectures so I haven't added
that code (they need to mark "rip" as undefined).

Fixes #24385.

Change-Id: I15b4c69ac75b491daa0acf0d981cb80eb06488de
Reviewed-on: https://go-review.googlesource.com/c/go/+/169726
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarCherry Zhang <cherryyz@google.com>
      aafe2573
    • Yuval Pavel Zholkover's avatar
      cmd/dist: enable cgo for freebsd/arm · 0bd101ce
      Yuval Pavel Zholkover authored 
      Change-Id: Icc1a54da848bf446919c0d5470d1e79fad339832
Reviewed-on: https://go-review.googlesource.com/c/go/+/171727Reviewed-by: default avatarTobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
      0bd101ce
    • Daniel Martí's avatar
      go/token: add IsIdentifier, IsKeyword, and IsExported · 60a8dbf3
      Daniel Martí authored 
      Telling whether a string is a valid Go identifier can seem like an easy
task, but it's easy to forget about the edge cases. For example, some
implementations out there forget that an empty string or keywords like
"func" aren't valid identifiers.

Add a simple implementation with proper Unicode support, and start using
it in cmd/cover and cmd/doc. Other pieces of the standard library
reimplement part of this logic, but don't use a "func(string) bool"
signature, so we're leaving them untouched for now.

Add some tests too, to ensure that we actually got these edge cases
correctly.

Since telling whether a string is a valid identifier requires knowing
that it's not a valid keyword, add IsKeyword too. The internal map was
already accessible via Lookup, but "Lookup(str) != IDENT" isn't as easy
to understand as IsKeyword(str). And, as per Josh's suggestion, we could
have IsKeyword (and probably Lookup too) use a perfect hash function
instead of a global map.

Finally, for consistency with these new functions, add IsExported. That
makes go/ast.IsExported a bit redundant, so perhaps it can be deprecated
in favor of go/token.IsExported in the future. Clarify that
token.IsExported doesn't imply token.IsIdentifier, to avoid ambiguity.

Fixes #30064.

Change-Id: I0e0e49215fd7e47b603ebc2b5a44086c51ba57f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/169018
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarRobert Griesemer <gri@golang.org>
Reviewed-by: default avatarAlan Donovan <adonovan@google.com>
      60a8dbf3
  3. 14 Apr, 2019 2 commits
  5. 13 Apr, 2019 5 commits
  7. 12 Apr, 2019 11 commits
  9. 11 Apr, 2019 11 commits
  11. 10 Apr, 2019 8 commits
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