| commit | aafe257390cc9048e8b5df898fabd79a9e0d4c39 | [log] [tgz] |
|---|---|---|
| author | Michael Munday <mike.munday@ibm.com> | Thu Mar 28 12:51:30 2019 -0400 |
| committer | Michael Munday <mike.munday@ibm.com> | Mon Apr 15 13:17:28 2019 +0000 |
| tree | 2c0636b4b1ab59eb4b00a1f185515ce22ee2ff5a | |
| parent | 0bd101cecc5458a8463b8d672bf1745c3cbb7c02 [diff] |
cmd/link, runtime: mark goexit as the top of the call stack 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: Cherry Zhang <cherryyz@google.com>
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