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Kernel: Merge PurgeableVMObject into AnonymousVMObject

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This implements memory commitments and lazy-allocation of committed
memory.
This commit is contained in:
Tom 2020-09-05 15:52:14 -06:00 • committed by Andreas Kling
parent b2a52f6208
commit 476f17b3f1
35 changed files with 937 additions and 564 deletions
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12
Kernel/FileSystem/ProcFS.cpp
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@ -56,8 +56,8 @@
#include <Kernel/Scheduler.h>
#include <Kernel/StdLib.h>
#include <Kernel/TTY/TTY.h>
#include <Kernel/VM/AnonymousVMObject.h>
#include <Kernel/VM/MemoryManager.h>
#include <Kernel/VM/PurgeableVMObject.h>
#include <LibC/errno_numbers.h>
//#define PROCFS_DEBUG
@ -329,9 +329,9 @@ static OwnPtr<KBuffer> procfs$pid_vm(InodeIdentifier identifier)
region_object.add("stack", region.is_stack());
region_object.add("shared", region.is_shared());
region_object.add("user_accessible", region.is_user_accessible());
region_object.add("purgeable", region.vmobject().is_purgeable());
if (region.vmobject().is_purgeable()) {
region_object.add("volatile", static_cast<const PurgeableVMObject&>(region.vmobject()).is_any_volatile());
region_object.add("purgeable", region.vmobject().is_anonymous());
if (region.vmobject().is_anonymous()) {
region_object.add("volatile", static_cast<const AnonymousVMObject&>(region.vmobject()).is_any_volatile());
}
region_object.add("cacheable", region.is_cacheable());
region_object.add("kernel", region.is_kernel());
@ -1254,6 +1254,10 @@ ssize_t ProcFSInode::read_bytes(off_t offset, ssize_t count, UserOrKernelBuffer&
if (!data)
return 0;
if (data->is_null()) {
dbg() << "ProcFS: Not enough memory!";
return 0;
}
if ((size_t)offset >= data->size())
return 0;