Mercurial > hg > truffle
diff src/share/vm/runtime/os.cpp @ 8124:5fc51c1ecdeb
Merge.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Tue, 05 Mar 2013 23:44:54 +0100 |
parents | 291ffc492eb6 9fae07c31641 |
children | 3ebe0b86736e |
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--- a/src/share/vm/runtime/os.cpp Tue Mar 05 21:58:51 2013 +0100 +++ b/src/share/vm/runtime/os.cpp Tue Mar 05 23:44:54 2013 +0100 @@ -985,15 +985,28 @@ // 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 @@ if (old_fp - ufp > 64 * K) return true; return false; +#endif } #ifdef ASSERT