Integrated: 8374469: Mixed jstack does not work on Windows

[Yasumasa Suenaga]

On Fri, 2 Jan 2026 14:43:58 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

> When we run `jhsdb jstack --mixed` on Windows, we can see top of call frames only as following:
> 
> 
> ----------------- 4 -----------------
> "main" #3 prio=5 tid=0x0000021ee0357e90 nid=22356 waiting on condition [0x0000004ae7eff000]
>    java.lang.Thread.State: TIMED_WAITING (sleeping)
>    JavaThread state: _thread_blocked
> 0x00007ffca3c41c44 ntdll!NtWaitForSingleObject + 0x14
> ----------------- 5 -----------------
> 
> 
> This is long standing bugs since JDK 9 at least (maybe this includes older JDK releases).
> We cannot depend on base pointer to unwind call frames, but SA do that.
> 
> This PR use [GetStackTrace](https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/dbgeng/nf-dbgeng-idebugcontrol-getstacktrace) to find caller frame, then native call frames would be unwinded.
> 
> However it has still problems for JIT'ed frames because it does not have a hint for unwinder like [RtlAddFunctionTable](https://learn.microsoft.com/en-us/windows/win32/api/winnt/nf-winnt-rtladdfunctiontable). But it would affect entire of JIT compilers, so I've limited the change to SA.
> 
> This change passed serviceability/sa tests on Windows 11.

This pull request has now been integrated.

Changeset: a8a88d79
Author:    Yasumasa Suenaga <ysuenaga at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/a8a88d79927b8c4704f5b7aa3948f13812fd87c3
Stats:     152 lines in 6 files changed: 122 ins; 2 del; 28 mod

8374469: Mixed jstack does not work on Windows

Reviewed-by: cjplummer, kevinw

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PR: https://git.openjdk.org/jdk/pull/29019