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6518907: cleanup IA64 specific code in Hotspot

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Removed unused IA64 specific code

Reviewed-by: twisti, kvn, dholmes
This commit is contained in:
Morris Meyer 2013-01-25 16:50:33 -08:00
parent 89b8658977
commit 7d8f623180
11 changed files with 171 additions and 212 deletions
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30
hotspot/src/share/vm/runtime/os.cpp
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@ -985,15 +985,28 @@ void os::print_location(outputStream* st, intptr_t x, bool verbose) {
// if C stack is walkable beyond current frame. The check for fp() is not
// necessary on Sparc, but it's harmless.
bool os::is_first_C_frame(frame* fr) {
#ifdef IA64
// In order to walk native frames on Itanium, we need to access the unwind
// table, which is inside ELF. We don't want to parse ELF after fatal error,
// so return true for IA64. If we need to support C stack walking on IA64,
// this function needs to be moved to CPU specific files, as fp() on IA64
// is register stack, which grows towards higher memory address.
#if defined(IA64) && !defined(_WIN32)
// On IA64 we have to check if the callers bsp is still valid
// (i.e. within the register stack bounds).
// Notice: this only works for threads created by the VM and only if
// we walk the current stack!!! If we want to be able to walk
// arbitrary other threads, we'll have to somehow store the thread
// object in the frame.
Thread *thread = Thread::current();
if ((address)fr->fp() <=
thread->register_stack_base() HPUX_ONLY(+ 0x0) LINUX_ONLY(+ 0x50)) {
// This check is a little hacky, because on Linux the first C
// frame's ('start_thread') register stack frame starts at
// "register_stack_base + 0x48" while on HPUX, the first C frame's
// ('__pthread_bound_body') register stack frame seems to really
// start at "register_stack_base".
return true;
} else {
return false;
}
#elif defined(IA64) && defined(_WIN32)
return true;
#endif
#else
// Load up sp, fp, sender sp and sender fp, check for reasonable values.
// Check usp first, because if that's bad the other accessors may fault
// on some architectures. Ditto ufp second, etc.
@ -1023,6 +1036,7 @@ bool os::is_first_C_frame(frame* fr) {
if (old_fp - ufp > 64 * K) return true;
return false;
#endif
}
#ifdef ASSERT