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6741004: UseLargePages + UseCompressedOops breaks implicit null checking guard page

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Turn off c2 implicit null checking on windows and large pages specified.

Reviewed-by: jrose, xlu
This commit is contained in:
Coleen Phillimore 2008-09-02 15:18:26 -04:00
parent 1d328ffab8
commit 83e7d32161
4 changed files with 16 additions and 9 deletions
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6
hotspot/src/share/vm/runtime/virtualspace.cpp
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@ -380,7 +380,8 @@ ReservedHeapSpace::ReservedHeapSpace(size_t size, size_t alignment,
bool large, char* requested_address) :
ReservedSpace(size, alignment, large,
requested_address,
UseCompressedOops ? lcm(os::vm_page_size(), alignment) : 0) {
UseCompressedOops && UseImplicitNullCheckForNarrowOop ?
lcm(os::vm_page_size(), alignment) : 0) {
// Only reserved space for the java heap should have a noaccess_prefix
// if using compressed oops.
protect_noaccess_prefix(size);
@ -391,7 +392,8 @@ ReservedHeapSpace::ReservedHeapSpace(const size_t prefix_size,
const size_t suffix_size,
const size_t suffix_align) :
ReservedSpace(prefix_size, prefix_align, suffix_size, suffix_align,
UseCompressedOops ? lcm(os::vm_page_size(), prefix_align) : 0) {
UseCompressedOops && UseImplicitNullCheckForNarrowOop ?
lcm(os::vm_page_size(), prefix_align) : 0) {
protect_noaccess_prefix(prefix_size+suffix_size);
}