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src/hotspot/share/asm/assembler.cpp

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rev 52354 : 8213199: GC abstraction for Assembler::needs_explicit_null_check()

*** 306,327 **** } return NULL; } bool MacroAssembler::needs_explicit_null_check(intptr_t offset) { ! // Exception handler checks the nmethod's implicit null checks table ! // only when this method returns false. ! #ifdef _LP64 ! if (UseCompressedOops && Universe::narrow_oop_base() != NULL) { ! assert (Universe::heap() != NULL, "java heap should be initialized"); ! // The first page after heap_base is unmapped and ! // the 'offset' is equal to [heap_base + offset] for ! // narrow oop implicit null checks. ! uintptr_t base = (uintptr_t)Universe::narrow_oop_base(); ! if ((uintptr_t)offset >= base) { ! // Normalize offset for the next check. ! offset = (intptr_t)(pointer_delta((void*)offset, (void*)base, 1)); ! } ! } ! #endif ! return offset < 0 || os::vm_page_size() <= offset; } --- 306,312 ---- } return NULL; } bool MacroAssembler::needs_explicit_null_check(intptr_t offset) { ! return BarrierSet::barrier_set()->barrier_set_assembler()->needs_explicit_null_check(offset); }
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