Hi -- I've just been hitting that as well.... I think it needs to be dealt with as a separate bug as there may be a few which are similar - and 6359295 is marked fixed in 5.0 long ago...
I just found your message after I'd done some investigating... The patch I was working with is to split one of the existing "if defined" statements, as currently the bug is: if we have PT_GETREGS defined, we use PTRACE_GETREGS to define PTRACE_GETREGS_REQ... We soon realise that may NOT be defined and give the "unsupported" message. So I can log and bug and get this done if it sounds good: [ke...@oldbox make]$ hg diff ../src/os/linux/ps_proc.c diff --git a/agent/src/os/linux/ps_proc.c b/agent/src/os/linux/ps_proc.c --- a/agent/src/os/linux/ps_proc.c +++ b/agent/src/os/linux/ps_proc.c @@ -124,9 +124,9 @@ #ifdef _LP64 #ifdef PTRACE_GETREGS64 #define PTRACE_GETREGS_REQ PTRACE_GETREGS64 -#endif -#else -#if defined(PTRACE_GETREGS) || defined(PT_GETREGS) +#elif defined(PTRACE_GETREGS) +#define PTRACE_GETREGS_REQ PTRACE_GETREGS +#elif defined (PT_GETREGS) #define PTRACE_GETREGS_REQ PTRACE_GETREGS #endif #endif /* _LP64 */ Regards Kevin On 15/11/2010 06:46, Yasumasa Suenaga wrote: > Hi. > > I and co-worker use jstack for various trouble shooting. > > We mainly use Java on Linux with AMD64 architecture. > However, jstack -F option doesn't work our platform. > > I ran jstack -F with LIBSAPROC_DEBUG=1 (environment variable), > I got following messages: > > > /***************/ > Thread 31933: (state = BLOCKED) > libsaproc DEBUG: ptrace(PTRACE_GETREGS, ...) not supported > Error occurred during stack walking: > sun.jvm.hotspot.debugger.DebuggerException: > sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a lwp > /***************/ > > > In order to fix this problem, I made a patch for preprocessor > macro in "agent/src/os/linux/ps_proc.c" . > The patch that attached this mail works well on Fedora 13 x86_64. > > Please merge this patch if you don't fix this problem yet. > > > Best regards. > >
