vm_unittest

Records

Functions

```
zx_status_t AllocUser (VmAspace * aspace, const char * name, size_t size, user_inout_ptr<void> * ptr)
```
Helper function to allocate memory in a user address space.

Defined at line 15 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
zx_status_t make_partially_committed_pager_vmo (size_t num_pages, size_t committed_pages, bool trap_dirty, bool resizable, bool ignore_requests, vm_page_t ** out_pages, fbl::RefPtr<VmObjectPaged> * out_vmo)
```
Create a pager-backed VMO |out_vmo| with size equals |num_pages| pages, and commit

|commited_pages| of its pages. |trap_dirty| controls whether modifications to pages must be

trapped in order to generate DIRTY page requests. |resizable| controls whether the created VMO is

resizable. Returns pointers to the pages committed in |out_pages|, so that tests can examine

their state. Allows tests to work with pager-backed VMOs without blocking on page faults. The

|ignore_requests| flag can be set if attempts at sending page faults should be ignored, or result

in a panic.

Defined at line 40 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
template <typename T>
```
```
void ConsumeValue (T value)
```
Consume the (scalar) value, ensuring that the operation to calculate the value can not be

optimized out/ deemed as unused by the compiler. I.e. this function can be used as a wrapper to a

calculation to ensure it will be in the binary.

Defined at line 69 of file ../../zircon/kernel/vm/unittests/aspace_unittest.cc
```
zx_status_t make_committed_pager_vmo (size_t num_pages, bool trap_dirty, bool resizable, vm_page_t ** out_pages, fbl::RefPtr<VmObjectPaged> * out_vmo)
```
Convenience wrapper for |make_partially_committed_pager_vmo| that commits all pages.

Defined at line 113 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
zx_status_t make_uncommitted_pager_vmo (size_t num_pages, bool trap_dirty, bool resizable, fbl::RefPtr<VmObjectPaged> * out_vmo)
```
Same as make_committed_pager_vmo but does not commit any pages in the VMO.

Defined at line 107 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
uint32_t test_rand (uint32_t seed)
```
Defined at line 119 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
void fill_region (uintptr_t seed, void * _ptr, size_t len)
```
fill a region of memory with a pattern based on the address of the region

Defined at line 122 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
void fill_region_user (uintptr_t seed, user_inout_ptr<void> _ptr, size_t len)
```
just like |fill_region|, but for user memory

Defined at line 137 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
bool test_region (uintptr_t seed, void * _ptr, size_t len)
```
test a region of memory against a known pattern

Defined at line 153 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
bool test_region_user (uintptr_t seed, user_inout_ptr<void> _ptr, size_t len)
```
just like |test_region|, but for user memory

Defined at line 173 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
bool fill_and_test (void * ptr, size_t len)
```
Defined at line 196 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
bool fill_and_test_user (user_inout_ptr<void> ptr, size_t len)
```
just like |fill_and_test|, but for user memory

Defined at line 210 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
bool verify_mapped_page_range (vaddr_t base, size_t mapping_size, size_t expected_mapped_page_count)
```
Helper function used by vmo_mapping_page_fault_optimisation_test.

Given a mapping, check that a run of consecutive pages are mapped (indicated by

expected_mapped_page_count) and that remaining pages are unmapped.

Defined at line 228 of file ../../zircon/kernel/vm/unittests/test_helper.cc
```
VmObject::AttributionCounts make_private_attribution_counts (uint64_t uncompresseduint64_t compressed)
```
Helper function that produces a filled out AttributionCounts for testing simple VMOs that just

have private and no shared content.

Defined at line 252 of file ../../zircon/kernel/vm/unittests/test_helper.cc