On Fri, 2 Jan 2026 14:43:58 GMT, Yasumasa Suenaga <[email protected]> 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 <[email protected]> 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 ------------- PR: https://git.openjdk.org/jdk/pull/29019
