本文整理汇总了C++中MM_GCExtensionsBase::getConcurrentScavengerPageStartAddress方法的典型用法代码示例。如果您正苦于以下问题：C++ MM_GCExtensionsBase::getConcurrentScavengerPageStartAddress方法的具体用法？C++ MM_GCExtensionsBase::getConcurrentScavengerPageStartAddress怎么用？C++ MM_GCExtensionsBase::getConcurrentScavengerPageStartAddress使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MM_GCExtensionsBase的用法示例。
在下文中一共展示了MM_GCExtensionsBase::getConcurrentScavengerPageStartAddress方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: defined
//.........这里部分代码省略.........
}
#else /* defined(OMR_GC_COMPRESSED_POINTERS) */
/*
* Code above might be used for non-compressedrefs platforms but need a few adjustments on it for this:
* - NON_SCALING_LOW_MEMORY_HEAP_CEILING should be set
* - OMRPORT_VMEM_ZOS_USE2TO32G_AREA flag for ZOS is expected to be used for compressedrefs heap allocation only
*/
Assert_MM_unimplemented();
#endif /* defined(OMR_GC_COMPRESSED_POINTERS) */
}
if((NULL != instance) && extensions->largePageFailOnError && (instance->getPageSize() != extensions->requestedPageSize)) {
extensions->heapInitializationFailureReason = MM_GCExtensionsBase::HEAP_INITIALIZATION_FAILURE_REASON_CAN_NOT_SATISFY_REQUESTED_PAGE_SIZE;
instance->kill(env);
instance = NULL;
return false;
}
handle->setVirtualMemory(instance);
if (NULL != instance) {
instance->incrementConsumerCount();
handle->setMemoryBase(instance->getHeapBase());
handle->setMemoryTop(instance->getHeapTop());
/*
* Aligning Nursery location to Concurrent Scavenger Page and calculate Concurrent Scavenger Page start address
* There are two possible cases here:
* - Nursery fits Concurrent Scavenger Page already = no extra alignment required
* - current Nursery location has crossed Concurrent Scavenger Page boundary so it needs to be pushed higher to
* have Nursery low address to be aligned to Concurrent Scavenger Page
*/
if (extensions->isConcurrentScavengerEnabled()) {
OMRPORT_ACCESS_FROM_ENVIRONMENT(env);
/* projected Nursery base and top */
/* assumed Nursery location in high addresses of the heap */
uintptr_t heapBase = (uintptr_t)handle->getMemoryBase();
uintptr_t nurseryTop = heapBase + size;
uintptr_t nurseryBase = nurseryTop - extensions->maxNewSpaceSize;
if (extensions->isDebugConcurrentScavengerPageAlignment()) {
omrtty_printf("Allocated memory for heap: [%p,%p]\n", handle->getMemoryBase(), handle->getMemoryTop());
}
uintptr_t baseAligned = MM_Math::roundToCeiling(concurrentScavengerPageSize, nurseryBase + 1);
uintptr_t topAligned = MM_Math::roundToCeiling(concurrentScavengerPageSize, nurseryTop);
if (baseAligned == topAligned) {
/* Nursery fits Concurrent Scavenger Page already */
extensions->setConcurrentScavengerPageStartAddress((void *)(baseAligned - concurrentScavengerPageSize));
if (extensions->isDebugConcurrentScavengerPageAlignment()) {
omrtty_printf("Expected Nursery start address 0x%zx\n", nurseryBase);
}
} else {
/* Nursery location should be adjusted */
extensions->setConcurrentScavengerPageStartAddress((void *)baseAligned);
if (extensions->isDebugConcurrentScavengerPageAlignment()) {
omrtty_printf("Expected Nursery start address adjusted to 0x%zx\n", baseAligned);
}
/* Move up entire heap for proper Nursery adjustment */
heapBase += (baseAligned - nurseryBase);
handle->setMemoryBase((void *)heapBase);
/* top of adjusted Nursery should fit reserved memory */
Assert_GC_true_with_message3(env, ((heapBase + size) <= (uintptr_t)handle->getMemoryTop()),
"End of projected heap (base 0x%zx + size 0x%zx) is larger then Top allocated %p\n",
heapBase, size, handle->getMemoryTop());
}
/* adjust heap top to lowest possible address */
handle->setMemoryTop((void *)(heapBase + size));
if (extensions->isDebugConcurrentScavengerPageAlignment()) {
omrtty_printf("Adjusted heap location: [%p,%p], Concurrent Scavenger Page start address %p, Concurrent Scavenger Page size 0x%zx\n",
handle->getMemoryBase(), handle->getMemoryTop(), extensions->getConcurrentScavengerPageStartAddress(), concurrentScavengerPageSize);
}
/*
* Concurrent Scavenger Page location might be aligned out of Compressed References supported memory range
* Fail to initialize in this case
*/
if ((NULL != ceiling) && (handle->getMemoryTop() > ceiling)) {
extensions->heapInitializationFailureReason = MM_GCExtensionsBase::HEAP_INITIALIZATION_FAILURE_REASON_CAN_NOT_INSTANTIATE_HEAP;
destroyVirtualMemory(env, handle);
instance = NULL;
}
}
}
#if defined(OMR_VALGRIND_MEMCHECK)
//Use handle's Memory Base to refer valgrind memory pool
valgrindCreateMempool(extensions, env, (uintptr_t)handle->getMemoryBase());
#endif /* defined(OMR_VALGRIND_MEMCHECK) */
return NULL != instance;
}