diff options
Diffstat (limited to 'src/os_cpu/windows_x86/vm/os_windows_x86.cpp')
| -rw-r--r-- | src/os_cpu/windows_x86/vm/os_windows_x86.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/os_cpu/windows_x86/vm/os_windows_x86.cpp b/src/os_cpu/windows_x86/vm/os_windows_x86.cpp index 960ceab66..52fe243ee 100644 --- a/src/os_cpu/windows_x86/vm/os_windows_x86.cpp +++ b/src/os_cpu/windows_x86/vm/os_windows_x86.cpp @@ -370,6 +370,26 @@ frame os::get_sender_for_C_frame(frame* fr) { return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); } +#ifndef AMD64 +// Returns an estimate of the current stack pointer. Result must be guaranteed +// to point into the calling threads stack, and be no lower than the current +// stack pointer. +address os::current_stack_pointer() { + int dummy; + address sp = (address)&dummy; + return sp; +} +#else +// Returns the current stack pointer. Accurate value needed for +// os::verify_stack_alignment(). +address os::current_stack_pointer() { + typedef address get_sp_func(); + get_sp_func* func = CAST_TO_FN_PTR(get_sp_func*, + StubRoutines::x86::get_previous_sp_entry()); + return (*func)(); +} +#endif + #ifndef AMD64 intptr_t* _get_previous_fp() { @@ -546,3 +566,11 @@ void os::setup_fpu() { __asm fldcw fpu_cntrl_word; #endif // !AMD64 } + +#ifndef PRODUCT +void os::verify_stack_alignment() { +#ifdef AMD64 + assert(((intptr_t)os::current_stack_pointer() & (StackAlignmentInBytes-1)) == 0, "incorrect stack alignment"); +#endif +} +#endif |