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fuchsia / zircon / 229dcfe9fd07d2e2ac60a468cf4da1b322973d96 / . / system / utest / vmo / vmo.cpp
blob: 2fabe3d89249e8b72a9341153e28180b806e79c3 [file] [log] [blame]
// Copyright 2016 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <ctype.h>
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <threads.h>
#include <zircon/process.h>
#include <zircon/syscalls.h>
#include <zircon/syscalls/object.h>
#include <fbl/algorithm.h>
#include <fbl/atomic.h>
#include <fbl/function.h>
#include <lib/fzl/memory-probe.h>
#include <pretty/hexdump.h>
#include <unittest/unittest.h>
#include "bench.h"
bool vmo_create_test() {
BEGIN_TEST;
zx_status_t status;
zx_handle_t vmo[16];
// allocate a bunch of vmos then free them
for (size_t i = 0; i < fbl::count_of(vmo); i++) {
status = zx_vmo_create(i * PAGE_SIZE, 0, &vmo[i]);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
}
for (size_t i = 0; i < fbl::count_of(vmo); i++) {
status = zx_handle_close(vmo[i]);
EXPECT_EQ(ZX_OK, status, "handle_close");
}
END_TEST;
}
bool vmo_read_write_test() {
BEGIN_TEST;
zx_status_t status;
zx_handle_t vmo;
// allocate an object and read/write from it
const size_t len = PAGE_SIZE * 4;
status = zx_vmo_create(len, 0, &vmo);
EXPECT_EQ(status, ZX_OK, "vm_object_create");
char buf[len];
status = zx_vmo_read(vmo, buf, 0, sizeof(buf));
EXPECT_EQ(status, ZX_OK, "vm_object_read");
// make sure it's full of zeros
size_t count = 0;
for (auto c: buf) {
EXPECT_EQ(c, 0, "zero test");
if (c != 0) {
printf("char at offset %#zx is bad\n", count);
}
count++;
}
memset(buf, 0x99, sizeof(buf));
status = zx_vmo_write(vmo, buf, 0, sizeof(buf));
EXPECT_EQ(status, ZX_OK, "vm_object_write");
// map it
uintptr_t ptr;
status = zx_vmar_map(zx_vmar_root_self(),
ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, 0, vmo, 0,
len, &ptr);
EXPECT_EQ(ZX_OK, status, "vm_map");
EXPECT_NE(0u, ptr, "vm_map");
// check that it matches what we last wrote into it
EXPECT_BYTES_EQ((uint8_t*)buf, (uint8_t*)ptr, sizeof(buf), "mapped buffer");
status = zx_vmar_unmap(zx_vmar_root_self(), ptr, len);
EXPECT_EQ(ZX_OK, status, "vm_unmap");
// close the handle
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "handle_close");
END_TEST;
}
bool vmo_read_write_range_test() {
BEGIN_TEST;
zx_status_t status;
zx_handle_t vmo;
// allocate an object
const size_t len = PAGE_SIZE * 4;
status = zx_vmo_create(len, 0, &vmo);
EXPECT_EQ(status, ZX_OK, "vm_object_create");
// fail to read past end
char buf[len * 2];
status = zx_vmo_read(vmo, buf, 0, sizeof(buf));
EXPECT_EQ(status, ZX_ERR_OUT_OF_RANGE, "vm_object_read past end");
// Successfully read 0 bytes at end
status = zx_vmo_read(vmo, buf, len, 0);
EXPECT_EQ(status, ZX_OK, "vm_object_read zero at end");
// Fail to read 0 bytes past end
status = zx_vmo_read(vmo, buf, len + 1, 0);
EXPECT_EQ(status, ZX_ERR_OUT_OF_RANGE, "vm_object_read zero past end");
// fail to write past end
status = zx_vmo_write(vmo, buf, 0, sizeof(buf));
EXPECT_EQ(status, ZX_ERR_OUT_OF_RANGE, "vm_object_write past end");
// Successfully write 0 bytes at end
status = zx_vmo_write(vmo, buf, len, 0);
EXPECT_EQ(status, ZX_OK, "vm_object_write zero at end");
// Fail to read 0 bytes past end
status = zx_vmo_write(vmo, buf, len + 1, 0);
EXPECT_EQ(status, ZX_ERR_OUT_OF_RANGE, "vm_object_write zero past end");
// Test for unsigned wraparound
status = zx_vmo_read(vmo, buf, UINT64_MAX - (len / 2), len);
EXPECT_EQ(status, ZX_ERR_OUT_OF_RANGE, "vm_object_read offset + len wraparound");
status = zx_vmo_write(vmo, buf, UINT64_MAX - (len / 2), len);
EXPECT_EQ(status, ZX_ERR_OUT_OF_RANGE, "vm_object_write offset + len wraparound");
// close the handle
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "handle_close");
END_TEST;
}
bool vmo_map_test() {
BEGIN_TEST;
zx_status_t status;
zx_handle_t vmo;
uintptr_t ptr[3] = {};
// allocate a vmo
status = zx_vmo_create(4 * PAGE_SIZE, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// do a regular map
ptr[0] = 0;
status = zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ, 0, vmo, 0,
PAGE_SIZE, &ptr[0]);
EXPECT_EQ(ZX_OK, status, "map");
EXPECT_NE(0u, ptr[0], "map address");
//printf("mapped %#" PRIxPTR "\n", ptr[0]);
// try to map something completely out of range without any fixed mapping, should succeed
ptr[2] = UINTPTR_MAX;
status = zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ, 0, vmo, 0,
PAGE_SIZE, &ptr[2]);
EXPECT_EQ(ZX_OK, status, "map");
EXPECT_NE(0u, ptr[2], "map address");
// try to map something completely out of range fixed, should fail
uintptr_t map_addr;
status = zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_SPECIFIC,
UINTPTR_MAX, vmo, 0, PAGE_SIZE, &map_addr);
EXPECT_EQ(ZX_ERR_INVALID_ARGS, status, "map");
// cleanup
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "handle_close");
for (auto p: ptr) {
if (p) {
status = zx_vmar_unmap(zx_vmar_root_self(), p, PAGE_SIZE);
EXPECT_EQ(ZX_OK, status, "unmap");
}
}
END_TEST;
}
bool vmo_read_only_map_test() {
BEGIN_TEST;
zx_status_t status;
zx_handle_t vmo;
// allocate an object and read/write from it
const size_t len = PAGE_SIZE;
status = zx_vmo_create(len, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// map it
uintptr_t ptr;
status = zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ, 0, vmo, 0,
len, &ptr);
EXPECT_EQ(ZX_OK, status, "vm_map");
EXPECT_NE(0u, ptr, "vm_map");
EXPECT_EQ(false, probe_for_write((void*)ptr), "write");
status = zx_vmar_unmap(zx_vmar_root_self(), ptr, len);
EXPECT_EQ(ZX_OK, status, "vm_unmap");
// close the handle
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "handle_close");
END_TEST;
}
bool vmo_no_perm_map_test() {
BEGIN_TEST;
zx_status_t status;
zx_handle_t vmo;
// allocate an object and read/write from it
const size_t len = PAGE_SIZE;
status = zx_vmo_create(len, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// map it with read permissions
uintptr_t ptr;
status = zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ, 0, vmo, 0, len, &ptr);
EXPECT_EQ(ZX_OK, status, "vm_map");
EXPECT_NE(0u, ptr, "vm_map");
// protect it to no permissions
status = zx_vmar_protect(zx_vmar_root_self(), 0, ptr, len);
EXPECT_EQ(ZX_OK, status, "vm_protect");
// test reading writing to the mapping
EXPECT_EQ(false, probe_for_read(reinterpret_cast<void*>(ptr)), "read");
EXPECT_EQ(false, probe_for_write(reinterpret_cast<void*>(ptr)), "write");
status = zx_vmar_unmap(zx_vmar_root_self(), ptr, len);
EXPECT_EQ(ZX_OK, status, "vm_unmap");
// close the handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
END_TEST;
}
bool vmo_no_perm_protect_test() {
BEGIN_TEST;
zx_status_t status;
zx_handle_t vmo;
// allocate an object and read/write from it
const size_t len = PAGE_SIZE;
status = zx_vmo_create(len, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// map it with no permissions
uintptr_t ptr;
status = zx_vmar_map(zx_vmar_root_self(), 0, 0, vmo, 0, len, &ptr);
EXPECT_EQ(ZX_OK, status, "vm_map");
EXPECT_NE(0u, ptr, "vm_map");
// test writing to the mapping
EXPECT_EQ(false, probe_for_write(reinterpret_cast<void*>(ptr)), "write");
// test reading to the mapping
EXPECT_EQ(false, probe_for_read(reinterpret_cast<void*>(ptr)), "read");
// protect it to read permissions and make sure it works as expected
status = zx_vmar_protect(zx_vmar_root_self(), ZX_VM_PERM_READ, ptr, len);
EXPECT_EQ(ZX_OK, status, "vm_protect");
// test writing to the mapping
EXPECT_EQ(false, probe_for_write(reinterpret_cast<void*>(ptr)), "write");
// test reading from the mapping
EXPECT_EQ(true, probe_for_read(reinterpret_cast<void*>(ptr)), "read");
status = zx_vmar_unmap(zx_vmar_root_self(), ptr, len);
EXPECT_EQ(ZX_OK, status, "vm_unmap");
// close the handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
END_TEST;
}
bool vmo_resize_test() {
BEGIN_TEST;
zx_status_t status;
zx_handle_t vmo;
// allocate an object
size_t len = PAGE_SIZE * 4;
status = zx_vmo_create(len, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// get the size that we set it to
uint64_t size = 0x99999999;
status = zx_vmo_get_size(vmo, &size);
EXPECT_EQ(ZX_OK, status, "vm_object_get_size");
EXPECT_EQ(len, size, "vm_object_get_size");
// try to resize it
len += PAGE_SIZE;
status = zx_vmo_set_size(vmo, len);
EXPECT_EQ(ZX_OK, status, "vm_object_set_size");
// get the size again
size = 0x99999999;
status = zx_vmo_get_size(vmo, &size);
EXPECT_EQ(ZX_OK, status, "vm_object_get_size");
EXPECT_EQ(len, size, "vm_object_get_size");
// try to resize it to a ludicrous size
status = zx_vmo_set_size(vmo, UINT64_MAX);
EXPECT_EQ(ZX_ERR_OUT_OF_RANGE, status, "vm_object_set_size too big");
// resize it to a non aligned size
status = zx_vmo_set_size(vmo, len + 1);
EXPECT_EQ(ZX_OK, status, "vm_object_set_size");
// size should be rounded up to the next page boundary
size = 0x99999999;
status = zx_vmo_get_size(vmo, &size);
EXPECT_EQ(ZX_OK, status, "vm_object_get_size");
EXPECT_EQ(fbl::round_up(len + 1u, static_cast<size_t>(PAGE_SIZE)), size, "vm_object_get_size");
len = fbl::round_up(len + 1u, static_cast<size_t>(PAGE_SIZE));
// map it
uintptr_t ptr;
status = zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ, 0, vmo, 0,
len, &ptr);
EXPECT_EQ(ZX_OK, status, "vm_map");
EXPECT_NE(ptr, 0, "vm_map");
// attempt to map expecting an non resizable vmo.
uintptr_t ptr2;
status = zx_vmar_map(
zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_REQUIRE_NON_RESIZABLE, 0,
vmo, 0, len, &ptr2);
EXPECT_EQ(ZX_ERR_NOT_SUPPORTED, status, "vm_map");
// resize it with it mapped
status = zx_vmo_set_size(vmo, size);
EXPECT_EQ(ZX_OK, status, "vm_object_set_size");
// unmap it
status = zx_vmar_unmap(zx_vmar_root_self(), ptr, len);
EXPECT_EQ(ZX_OK, status, "unmap");
// close the handle
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "handle_close");
END_TEST;
}
// Check that non-resizable VMOs cannot get resized.
static bool vmo_no_resize_helper(zx_handle_t vmo, const size_t len) {
BEGIN_TEST;
EXPECT_NE(vmo, ZX_HANDLE_INVALID);
zx_status_t status;
status = zx_vmo_set_size(vmo, len + PAGE_SIZE);
EXPECT_EQ(ZX_ERR_UNAVAILABLE, status, "vm_object_set_size");
status = zx_vmo_set_size(vmo, len - PAGE_SIZE);
EXPECT_EQ(ZX_ERR_UNAVAILABLE, status, "vm_object_set_size");
size_t size;
status = zx_vmo_get_size(vmo, &size);
EXPECT_EQ(ZX_OK, status, "vm_object_get_size");
EXPECT_EQ(len, size, "vm_object_get_size");
uintptr_t ptr;
status = zx_vmar_map(
zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_REQUIRE_NON_RESIZABLE,
0, vmo, 0, len,
&ptr);
ASSERT_EQ(ZX_OK, status, "vm_map");
ASSERT_NE(ptr, 0, "vm_map");
status = zx_vmar_unmap(zx_vmar_root_self(), ptr, len);
EXPECT_EQ(ZX_OK, status, "unmap");
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "handle_close");
END_TEST;
}
bool vmo_no_resize_test() {
const size_t len = PAGE_SIZE * 4;
zx_handle_t vmo = ZX_HANDLE_INVALID;
zx_vmo_create(len, ZX_VMO_NON_RESIZABLE, &vmo);
return vmo_no_resize_helper(vmo, len);
}
bool vmo_info_test() {
size_t len = PAGE_SIZE * 4;
zx_handle_t vmo = ZX_HANDLE_INVALID;
zx_info_vmo_t info;
zx_status_t status;
// Create a non-resizeable VMO, query the INFO on it
// and dump it.
status = zx_vmo_create(len, ZX_VMO_NON_RESIZABLE, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_info_test: vmo_create");
status = zx_object_get_info(vmo, ZX_INFO_VMO, &info,
sizeof(info), nullptr, nullptr);
EXPECT_EQ(ZX_OK, status, "vm_info_test: info_vmo");
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "vm_info_test: handle_close");
EXPECT_EQ(info.size_bytes, len, "vm_info_test: info_vmo.size_bytes");
EXPECT_NE(info.create_options, (1u << 0),
"vm_info_test: info_vmo.create_options");
// printf("NON_Resizeable VMO, size = %lu, create_options = %ux\n",
// info.size_bytes, info.create_options);
// Create a resizeable VMO, query the INFO on it and dump it.
len = PAGE_SIZE * 8;
zx_vmo_create(len, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_info_test: vmo_create");
status = zx_object_get_info(vmo, ZX_INFO_VMO, &info,
sizeof(info), nullptr, nullptr);
EXPECT_EQ(ZX_OK, status, "vm_info_test: info_vmo");
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "vm_info_test: handle_close");
EXPECT_EQ(info.size_bytes, len, "vm_info_test: info_vmo.size_bytes");
EXPECT_EQ(info.create_options, (1u << 0),
"vm_info_test: info_vmo.create_options");
// printf("Resizeable VMO, size = %lu, create_options = %ux\n",
// info.size_bytes, info.create_options);
END_TEST;
}
bool vmo_no_resize_clone_test() {
const size_t len = PAGE_SIZE * 4;
zx_handle_t vmo = ZX_HANDLE_INVALID;
zx_handle_t clone = ZX_HANDLE_INVALID;
zx_vmo_create(len, 0, &vmo);
zx_vmo_clone(vmo,
ZX_VMO_CLONE_COPY_ON_WRITE | ZX_VMO_CLONE_NON_RESIZEABLE,
0, len, &clone);
return vmo_no_resize_helper(clone, len);
}
bool vmo_size_align_test() {
BEGIN_TEST;
for (uint64_t s = 0; s < PAGE_SIZE * 4; s++) {
zx_handle_t vmo;
// create a new object with nonstandard size
zx_status_t status = zx_vmo_create(s, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// should be the size rounded up to the nearest page boundary
uint64_t size = 0x99999999;
status = zx_vmo_get_size(vmo, &size);
EXPECT_EQ(ZX_OK, status, "vm_object_get_size");
EXPECT_EQ(fbl::round_up(s, static_cast<size_t>(PAGE_SIZE)), size, "vm_object_get_size");
// close the handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
}
END_TEST;
}
bool vmo_resize_align_test() {
BEGIN_TEST;
// resize a vmo with a particular size and test that the resulting size is aligned on a page
// boundary.
zx_handle_t vmo;
zx_status_t status = zx_vmo_create(0, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
for (uint64_t s = 0; s < PAGE_SIZE * 4; s++) {
// set the size of the object
zx_status_t status = zx_vmo_set_size(vmo, s);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// should be the size rounded up to the nearest page boundary
uint64_t size = 0x99999999;
status = zx_vmo_get_size(vmo, &size);
EXPECT_EQ(ZX_OK, status, "vm_object_get_size");
EXPECT_EQ(fbl::round_up(s, static_cast<size_t>(PAGE_SIZE)), size, "vm_object_get_size");
}
// close the handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
END_TEST;
}
bool vmo_clone_size_align_test() {
BEGIN_TEST;
zx_handle_t vmo;
zx_status_t status = zx_vmo_create(0, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// create clones with different sizes, make sure the created size is a multiple of a page size
for (uint64_t s = 0; s < PAGE_SIZE * 4; s++) {
zx_handle_t clone_vmo;
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, s, &clone_vmo), "vm_clone");
// should be the size rounded up to the nearest page boundary
uint64_t size = 0x99999999;
zx_status_t status = zx_vmo_get_size(clone_vmo, &size);
EXPECT_EQ(ZX_OK, status, "vm_object_get_size");
EXPECT_EQ(fbl::round_up(s, static_cast<size_t>(PAGE_SIZE)), size, "vm_object_get_size");
// close the handle
EXPECT_EQ(ZX_OK, zx_handle_close(clone_vmo), "handle_close");
}
// close the handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
END_TEST;
}
static bool rights_test_map_helper(
zx_handle_t vmo, size_t len, uint32_t flags,
bool expect_success, zx_status_t fail_err_code, const char *msg) {
uintptr_t ptr;
zx_status_t r = zx_vmar_map(zx_vmar_root_self(), flags, 0, vmo, 0, len,
&ptr);
if (expect_success) {
EXPECT_EQ(ZX_OK, r, msg);
r = zx_vmar_unmap(zx_vmar_root_self(), ptr, len);
EXPECT_EQ(ZX_OK, r, "unmap");
} else {
EXPECT_EQ(fail_err_code, r, msg);
}
return true;
}
// Returns zero on failure.
static zx_rights_t get_handle_rights(zx_handle_t h) {
zx_info_handle_basic_t info;
zx_status_t s = zx_object_get_info(h, ZX_INFO_HANDLE_BASIC, &info,
sizeof(info), nullptr, nullptr);
if (s != ZX_OK) {
EXPECT_EQ(s, ZX_OK); // Poison the test
return 0;
}
return info.rights;
}
bool vmo_rights_test() {
BEGIN_TEST;
char buf[4096];
size_t len = PAGE_SIZE * 4;
zx_status_t status;
zx_handle_t vmo, vmo2;
// allocate an object
status = zx_vmo_create(len, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// Check that the handle has at least the expected rights.
// This list should match the list in docs/syscalls/vmo_create.md.
static const zx_rights_t kExpectedRights =
ZX_RIGHT_DUPLICATE |
ZX_RIGHT_TRANSFER |
ZX_RIGHT_WAIT |
ZX_RIGHT_READ |
ZX_RIGHT_WRITE |
ZX_RIGHT_EXECUTE |
ZX_RIGHT_MAP |
ZX_RIGHT_GET_PROPERTY |
ZX_RIGHT_SET_PROPERTY;
EXPECT_EQ(kExpectedRights, kExpectedRights & get_handle_rights(vmo));
// test that we can read/write it
status = zx_vmo_read(vmo, buf, 0, 0);
EXPECT_EQ(0, status, "vmo_read");
status = zx_vmo_write(vmo, buf, 0, 0);
EXPECT_EQ(0, status, "vmo_write");
vmo2 = ZX_HANDLE_INVALID;
zx_handle_duplicate(vmo, ZX_RIGHT_READ, &vmo2);
status = zx_vmo_read(vmo2, buf, 0, 0);
EXPECT_EQ(0, status, "vmo_read");
status = zx_vmo_write(vmo2, buf, 0, 0);
EXPECT_EQ(ZX_ERR_ACCESS_DENIED, status, "vmo_write");
zx_handle_close(vmo2);
vmo2 = ZX_HANDLE_INVALID;
zx_handle_duplicate(vmo, ZX_RIGHT_WRITE, &vmo2);
status = zx_vmo_read(vmo2, buf, 0, 0);
EXPECT_EQ(ZX_ERR_ACCESS_DENIED, status, "vmo_read");
status = zx_vmo_write(vmo2, buf, 0, 0);
EXPECT_EQ(0, status, "vmo_write");
zx_handle_close(vmo2);
vmo2 = ZX_HANDLE_INVALID;
zx_handle_duplicate(vmo, 0, &vmo2);
status = zx_vmo_read(vmo2, buf, 0, 0);
EXPECT_EQ(ZX_ERR_ACCESS_DENIED, status, "vmo_read");
status = zx_vmo_write(vmo2, buf, 0, 0);
EXPECT_EQ(ZX_ERR_ACCESS_DENIED, status, "vmo_write");
zx_handle_close(vmo2);
// full perm test
if (!rights_test_map_helper(vmo, len, 0, true, 0, "map_noperms")) return false;
if (!rights_test_map_helper(vmo, len, ZX_VM_PERM_READ, true, 0, "map_read")) return false;
if (!rights_test_map_helper(vmo, len, ZX_VM_PERM_WRITE, false, ZX_ERR_INVALID_ARGS, "map_write")) return false;
if (!rights_test_map_helper(vmo, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, true, 0, "map_readwrite")) return false;
if (!rights_test_map_helper(vmo, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_PERM_EXECUTE, true, 0, "map_readwriteexec")) return false;
if (!rights_test_map_helper(vmo, len, ZX_VM_PERM_READ | ZX_VM_PERM_EXECUTE, true, 0, "map_readexec")) return false;
// try most of the permuations of mapping a vmo with various rights dropped
vmo2 = ZX_HANDLE_INVALID;
zx_handle_duplicate(vmo, ZX_RIGHT_READ | ZX_RIGHT_WRITE | ZX_RIGHT_EXECUTE, &vmo2);
if (!rights_test_map_helper(vmo2, len, 0, false, ZX_ERR_ACCESS_DENIED, "map_noperms")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ, false, ZX_ERR_ACCESS_DENIED, "map_read")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_WRITE, false, ZX_ERR_ACCESS_DENIED, "map_write")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, false, ZX_ERR_ACCESS_DENIED, "map_readwrite")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_PERM_EXECUTE, false, ZX_ERR_ACCESS_DENIED, "map_readwriteexec")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_EXECUTE, false, ZX_ERR_ACCESS_DENIED, "map_readexec")) return false;
zx_handle_close(vmo2);
vmo2 = ZX_HANDLE_INVALID;
zx_handle_duplicate(vmo, ZX_RIGHT_READ | ZX_RIGHT_MAP, &vmo2);
if (!rights_test_map_helper(vmo2, len, 0, true, 0, "map_noperms")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ, true, 0, "map_read")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_WRITE, false, ZX_ERR_INVALID_ARGS, "map_write")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, false, ZX_ERR_ACCESS_DENIED, "map_readwrite")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_PERM_EXECUTE, false, ZX_ERR_ACCESS_DENIED, "map_readwriteexec")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_EXECUTE, false, ZX_ERR_ACCESS_DENIED, "map_readexec")) return false;
zx_handle_close(vmo2);
vmo2 = ZX_HANDLE_INVALID;
zx_handle_duplicate(vmo, ZX_RIGHT_WRITE | ZX_RIGHT_MAP, &vmo2);
if (!rights_test_map_helper(vmo2, len, 0, true, 0, "map_noperms")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ, false, ZX_ERR_ACCESS_DENIED, "map_read")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_WRITE, false, ZX_ERR_INVALID_ARGS, "map_write")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, false, ZX_ERR_ACCESS_DENIED, "map_readwrite")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_PERM_EXECUTE, false, ZX_ERR_ACCESS_DENIED, "map_readwriteexec")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_EXECUTE, false, ZX_ERR_ACCESS_DENIED, "map_readexec")) return false;
zx_handle_close(vmo2);
vmo2 = ZX_HANDLE_INVALID;
zx_handle_duplicate(vmo, ZX_RIGHT_READ | ZX_RIGHT_WRITE | ZX_RIGHT_MAP, &vmo2);
if (!rights_test_map_helper(vmo2, len, 0, true, 0, "map_noperms")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ, true, 0, "map_read")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_WRITE, false, ZX_ERR_INVALID_ARGS, "map_write")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, true, 0, "map_readwrite")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_PERM_EXECUTE, false, ZX_ERR_ACCESS_DENIED, "map_readwriteexec")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_EXECUTE, false, ZX_ERR_ACCESS_DENIED, "map_readexec")) return false;
zx_handle_close(vmo2);
vmo2 = ZX_HANDLE_INVALID;
zx_handle_duplicate(vmo, ZX_RIGHT_READ | ZX_RIGHT_EXECUTE | ZX_RIGHT_MAP, &vmo2);
if (!rights_test_map_helper(vmo2, len, 0, true, 0, "map_noperms")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ, true, 0, "map_read")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_WRITE, false, ZX_ERR_INVALID_ARGS, "map_write")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, false, ZX_ERR_ACCESS_DENIED, "map_readwrite")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_PERM_EXECUTE, false, ZX_ERR_ACCESS_DENIED, "map_readwriteexec")) return false;
if (!rights_test_map_helper(vmo, len, ZX_VM_PERM_READ | ZX_VM_PERM_EXECUTE, true, 0, "map_readexec")) return false;
zx_handle_close(vmo2);
vmo2 = ZX_HANDLE_INVALID;
zx_handle_duplicate(vmo, ZX_RIGHT_READ | ZX_RIGHT_WRITE | ZX_RIGHT_EXECUTE | ZX_RIGHT_MAP, &vmo2);
if (!rights_test_map_helper(vmo2, len, 0, true, 0, "map_noperms")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ, true, 0, "map_read")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_WRITE, false, ZX_ERR_INVALID_ARGS, "map_write")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, true, 0, "map_readwrite")) return false;
if (!rights_test_map_helper(vmo2, len, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_PERM_EXECUTE, true, 0, "map_readwriteexec")) return false;
if (!rights_test_map_helper(vmo, len, ZX_VM_PERM_READ | ZX_VM_PERM_EXECUTE, true, 0, "map_readexec")) return false;
zx_handle_close(vmo2);
// test that we can get/set a property on it
const char *set_name = "test vmo";
status = zx_object_set_property(vmo, ZX_PROP_NAME, set_name, sizeof(set_name));
EXPECT_EQ(ZX_OK, status, "set_property");
char get_name[ZX_MAX_NAME_LEN];
status = zx_object_get_property(vmo, ZX_PROP_NAME, get_name, sizeof(get_name));
EXPECT_EQ(ZX_OK, status, "get_property");
EXPECT_STR_EQ(set_name, get_name, "vmo name");
// close the handle
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "handle_close");
END_TEST;
}
bool vmo_commit_test() {
BEGIN_TEST;
zx_handle_t vmo;
zx_status_t status;
uintptr_t ptr, ptr2, ptr3;
// create a vmo
const size_t size = 16384;
status = zx_vmo_create(size, 0, &vmo);
EXPECT_EQ(0, status, "vm_object_create");
// commit a range of it
status = zx_vmo_op_range(vmo, ZX_VMO_OP_COMMIT, 0, size, nullptr, 0);
EXPECT_EQ(0, status, "vm commit");
// decommit that range
status = zx_vmo_op_range(vmo, ZX_VMO_OP_DECOMMIT, 0, size, nullptr, 0);
EXPECT_EQ(0, status, "vm decommit");
// commit a range of it
status = zx_vmo_op_range(vmo, ZX_VMO_OP_COMMIT, 0, size, nullptr, 0);
EXPECT_EQ(0, status, "vm commit");
// map it
ptr = 0;
status = zx_vmar_map(zx_vmar_root_self(),
ZX_VM_PERM_READ|ZX_VM_PERM_WRITE,
0, vmo, 0, size, &ptr);
EXPECT_EQ(ZX_OK, status, "map");
EXPECT_NE(ptr, 0, "map address");
// second mapping with an offset
ptr2 = 0;
status = zx_vmar_map(zx_vmar_root_self(),
ZX_VM_PERM_READ|ZX_VM_PERM_WRITE,
0, vmo, PAGE_SIZE, size, &ptr2);
EXPECT_EQ(ZX_OK, status, "map2");
EXPECT_NE(ptr2, 0, "map address2");
// third mapping with a totally non-overlapping offset
ptr3 = 0;
status = zx_vmar_map(zx_vmar_root_self(),
ZX_VM_PERM_READ|ZX_VM_PERM_WRITE,
0, vmo, size * 2, size, &ptr3);
EXPECT_EQ(ZX_OK, status, "map3");
EXPECT_NE(ptr3, 0, "map address3");
// write into it at offset PAGE_SIZE, read it back
volatile uint32_t *u32 = (volatile uint32_t *)(ptr + PAGE_SIZE);
*u32 = 99;
EXPECT_EQ(99u, (*u32), "written memory");
// check the alias
volatile uint32_t *u32a = (volatile uint32_t *)(ptr2);
EXPECT_EQ(99u, (*u32a), "written memory");
// decommit page 0
status = zx_vmo_op_range(vmo, ZX_VMO_OP_DECOMMIT, 0, PAGE_SIZE, nullptr, 0);
EXPECT_EQ(0, status, "vm decommit");
// verify that it didn't get unmapped
EXPECT_EQ(99u, (*u32), "written memory");
// verify that it didn't get unmapped
EXPECT_EQ(99u, (*u32a), "written memory2");
// decommit page 1
status = zx_vmo_op_range(vmo, ZX_VMO_OP_DECOMMIT, PAGE_SIZE, PAGE_SIZE, nullptr, 0);
EXPECT_EQ(0, status, "vm decommit");
// verify that it did get unmapped
EXPECT_EQ(0u, (*u32), "written memory");
// verify that it did get unmapped
EXPECT_EQ(0u, (*u32a), "written memory2");
// unmap our vmos
status = zx_vmar_unmap(zx_vmar_root_self(), ptr, size);
EXPECT_EQ(ZX_OK, status, "vm_unmap");
status = zx_vmar_unmap(zx_vmar_root_self(), ptr2, size);
EXPECT_EQ(ZX_OK, status, "vm_unmap");
status = zx_vmar_unmap(zx_vmar_root_self(), ptr3, size);
EXPECT_EQ(ZX_OK, status, "vm_unmap");
// close the handle
status = zx_handle_close(vmo);
EXPECT_EQ(ZX_OK, status, "handle_close");
END_TEST;
}
bool vmo_zero_page_test() {
BEGIN_TEST;
zx_handle_t vmo;
zx_status_t status;
uintptr_t ptr[3];
// create a vmo
const size_t size = PAGE_SIZE * 4;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "vm_object_create");
// make a few mappings of the vmo
for (auto &p: ptr) {
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ|ZX_VM_PERM_WRITE, 0, vmo, 0, size, &p),
"map");
EXPECT_NONNULL(ptr, "map address");
}
volatile uint32_t *val = (volatile uint32_t *)ptr[0];
volatile uint32_t *val2 = (volatile uint32_t *)ptr[1];
volatile uint32_t *val3 = (volatile uint32_t *)ptr[2];
// read fault in the first mapping
EXPECT_EQ(0, *val, "read zero");
// write fault the second mapping
*val2 = 99;
EXPECT_EQ(99, *val2, "read back 99");
// expect the third mapping to read fault in the new page
EXPECT_EQ(99, *val3, "read 99");
// expect the first mapping to have gotten updated with the new mapping
// and no longer be mapping the zero page
EXPECT_EQ(99, *val, "read 99 from former zero page");
// read fault in zeros on the second page
val = (volatile uint32_t *)(ptr[0] + PAGE_SIZE);
EXPECT_EQ(0, *val, "read zero");
// write to the page via a vmo_write call
uint32_t v = 100;
status = zx_vmo_write(vmo, &v, PAGE_SIZE, sizeof(v));
EXPECT_EQ(ZX_OK, status, "writing to vmo");
// expect it to read back the new value
EXPECT_EQ(100, *val, "read 100 from former zero page");
// read fault in zeros on the third page
val = (volatile uint32_t *)(ptr[0] + PAGE_SIZE * 2);
EXPECT_EQ(0, *val, "read zero");
// commit this range of the vmo via a commit call
status = zx_vmo_op_range(vmo, ZX_VMO_OP_COMMIT, PAGE_SIZE * 2, PAGE_SIZE, nullptr, 0);
EXPECT_EQ(ZX_OK, status, "committing memory");
// write to the third page
status = zx_vmo_write(vmo, &v, PAGE_SIZE * 2, sizeof(v));
EXPECT_EQ(ZX_OK, status, "writing to vmo");
// expect it to read back the new value
EXPECT_EQ(100, *val, "read 100 from former zero page");
// unmap
for (auto p: ptr)
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), p, size), "unmap");
// close the handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
END_TEST;
}
// test set 1: create a few clones, close them
bool vmo_clone_test_1() {
BEGIN_TEST;
zx_handle_t vmo;
zx_handle_t clone_vmo[3];
// create a vmo
const size_t size = PAGE_SIZE * 4;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "vm_object_create");
EXPECT_EQ(ZX_OK, zx_object_set_property(vmo, ZX_PROP_NAME, "test1", 5), "zx_object_set_property");
// clone it
clone_vmo[0] = ZX_HANDLE_INVALID;
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone_vmo[0]), "vm_clone");
EXPECT_NE(ZX_HANDLE_INVALID, clone_vmo[0], "vm_clone_handle");
char name[ZX_MAX_NAME_LEN];
EXPECT_EQ(ZX_OK, zx_object_get_property(clone_vmo[0], ZX_PROP_NAME, name, ZX_MAX_NAME_LEN), "zx_object_get_property");
EXPECT_TRUE(!strcmp(name, "test1"), "get_name");
// clone it a second time
clone_vmo[1] = ZX_HANDLE_INVALID;
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone_vmo[1]), "vm_clone");
EXPECT_NE(ZX_HANDLE_INVALID, clone_vmo[1], "vm_clone_handle");
// clone the clone
clone_vmo[2] = ZX_HANDLE_INVALID;
EXPECT_EQ(ZX_OK, zx_vmo_clone(clone_vmo[1], ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone_vmo[2]), "vm_clone");
EXPECT_NE(ZX_HANDLE_INVALID, clone_vmo[2], "vm_clone_handle");
// close the original handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
// close the clone handles
for (auto h: clone_vmo)
EXPECT_EQ(ZX_OK, zx_handle_close(h), "handle_close");
END_TEST;
}
// test set 2: create a clone, verify that it COWs via the read/write interface
bool vmo_clone_test_2() {
BEGIN_TEST;
zx_handle_t vmo;
zx_handle_t clone_vmo[1];
// create a vmo
const size_t size = PAGE_SIZE * 4;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "vm_object_create");
// fill the original with stuff
for (size_t off = 0; off < size; off += sizeof(off)) {
zx_vmo_write(vmo, &off, off, sizeof(off));
}
// clone it
clone_vmo[0] = ZX_HANDLE_INVALID;
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone_vmo[0]), "vm_clone");
EXPECT_NE(ZX_HANDLE_INVALID, clone_vmo[0], "vm_clone_handle");
// verify that the clone reads back as the same
for (size_t off = 0; off < size; off += sizeof(off)) {
size_t val;
zx_vmo_read(clone_vmo[0], &val, off, sizeof(val));
if (val != off) {
EXPECT_EQ(val, off, "vm_clone read back");
break;
}
}
// write to part of the clone
size_t val = 99;
zx_vmo_write(clone_vmo[0], &val, 0, sizeof(val));
// verify the clone was written to
EXPECT_EQ(ZX_OK, zx_vmo_read(clone_vmo[0], &val, 0, sizeof(val)), "writing to clone");
// verify it was written to
EXPECT_EQ(99, val, "reading back from clone");
// verify that the rest of the page it was written two was cloned
for (size_t off = sizeof(val); off < PAGE_SIZE; off += sizeof(off)) {
zx_vmo_read(clone_vmo[0], &val, off, sizeof(val));
if (val != off) {
EXPECT_EQ(val, off, "vm_clone read back");
break;
}
}
// verify that it didn't trash the original
for (size_t off = 0; off < size; off += sizeof(off)) {
zx_vmo_read(vmo, &val, off, sizeof(val));
if (val != off) {
EXPECT_EQ(val, off, "vm_clone read back of original");
break;
}
}
// write to the original in the part that is still visible to the clone
val = 99;
uint64_t offset = PAGE_SIZE * 2;
EXPECT_EQ(ZX_OK, zx_vmo_write(vmo, &val, offset, sizeof(val)), "writing to original");
EXPECT_EQ(ZX_OK, zx_vmo_read(clone_vmo[0], &val, offset, sizeof(val)), "reading back original from clone");
EXPECT_EQ(99, val, "checking value");
// close the clone handles
for (auto h: clone_vmo)
EXPECT_EQ(ZX_OK, zx_handle_close(h), "handle_close");
// close the original handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
END_TEST;
}
// test set 3: test COW via a mapping
bool vmo_clone_test_3() {
BEGIN_TEST;
zx_handle_t vmo;
zx_handle_t clone_vmo[1];
uintptr_t ptr;
uintptr_t clone_ptr;
volatile uint32_t *p;
volatile uint32_t *cp;
// create a vmo
const size_t size = PAGE_SIZE * 4;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "vm_object_create");
// map it
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ|ZX_VM_PERM_WRITE, 0, vmo, 0, size, &ptr),
"map");
EXPECT_NE(ptr, 0, "map address");
p = (volatile uint32_t *)ptr;
// clone it
clone_vmo[0] = ZX_HANDLE_INVALID;
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone_vmo[0]),"vm_clone");
EXPECT_NE(ZX_HANDLE_INVALID, clone_vmo[0], "vm_clone_handle");
// Attempt a non-resizable map fails.
EXPECT_EQ(ZX_ERR_NOT_SUPPORTED,
zx_vmar_map(zx_vmar_root_self(),
ZX_VM_PERM_READ|ZX_VM_PERM_WRITE|ZX_VM_REQUIRE_NON_RESIZABLE,
0, clone_vmo[0], 0, size, &clone_ptr), "map");
// Regular resizable mapping works.
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ|ZX_VM_PERM_WRITE, 0, clone_vmo[0], 0, size, &clone_ptr),
"map");
EXPECT_NE(clone_ptr, 0, "map address");
cp = (volatile uint32_t *)clone_ptr;
// read zeros from both
for (size_t off = 0; off < size / sizeof(off); off++) {
size_t val = p[off];
if (val != 0) {
EXPECT_EQ(0, val, "reading zeros from original");
break;
}
}
for (size_t off = 0; off < size / sizeof(off); off++) {
size_t val = cp[off];
if (val != 0) {
EXPECT_EQ(0, val, "reading zeros from original");
break;
}
}
// write to both sides and make sure it does a COW
p[0] = 99;
EXPECT_EQ(99, p[0], "wrote to original");
EXPECT_EQ(99, cp[0], "read back from clone");
cp[0] = 100;
EXPECT_EQ(100, cp[0], "read back from clone");
EXPECT_EQ(99, p[0], "read back from original");
// close the original handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
// close the clone handle
EXPECT_EQ(ZX_OK, zx_handle_close(clone_vmo[0]), "handle_close");
// unmap
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), ptr, size), "unmap");
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), clone_ptr, size), "unmap");
END_TEST;
}
// verify that the parent is visible through decommited pages
bool vmo_clone_decommit_test() {
BEGIN_TEST;
zx_handle_t vmo;
zx_handle_t clone_vmo;
uintptr_t ptr;
uintptr_t clone_ptr;
volatile uint32_t *p;
volatile uint32_t *cp;
// create a vmo
const size_t size = PAGE_SIZE * 4;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "vm_object_create");
// map it
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ|ZX_VM_PERM_WRITE, 0, vmo, 0, size, &ptr),
"map");
EXPECT_NE(ptr, 0, "map address");
p = (volatile uint32_t *)ptr;
// clone it and map that
clone_vmo = ZX_HANDLE_INVALID;
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone_vmo), "vm_clone");
EXPECT_NE(ZX_HANDLE_INVALID, clone_vmo, "vm_clone_handle");
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ|ZX_VM_PERM_WRITE, 0, clone_vmo, 0, size, &clone_ptr),
"map");
EXPECT_NE(clone_ptr, 0, "map address");
cp = (volatile uint32_t *)clone_ptr;
// write to parent and make sure clone sees it
p[0] = 99;
EXPECT_EQ(99, p[0], "wrote to original");
EXPECT_EQ(99, cp[0], "read back from clone");
// write to clone to get a different state
cp[0] = 100;
EXPECT_EQ(100, cp[0], "read back from clone");
EXPECT_EQ(99, p[0], "read back from original");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(clone_vmo, ZX_VMO_OP_DECOMMIT, 0, PAGE_SIZE, NULL, 0));
// make sure that clone reverted to original, and that parent is unaffected
// by the decommit
EXPECT_EQ(99, cp[0], "read back from clone");
EXPECT_EQ(99, p[0], "read back from original");
// make sure the decommited page still has COW semantics
cp[0] = 100;
EXPECT_EQ(100, cp[0], "read back from clone");
EXPECT_EQ(99, p[0], "read back from original");
// close the original handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
// close the clone handle
EXPECT_EQ(ZX_OK, zx_handle_close(clone_vmo), "handle_close");
// unmap
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), ptr, size), "unmap");
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), clone_ptr, size), "unmap");
END_TEST;
}
// verify the affect of commit on a clone
bool vmo_clone_commit_test() {
BEGIN_TEST;
zx_handle_t vmo;
zx_handle_t clone_vmo;
uintptr_t ptr;
uintptr_t clone_ptr;
volatile uint32_t *p;
volatile uint32_t *cp;
// create a vmo
const size_t size = PAGE_SIZE * 4;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "vm_object_create");
// map it
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ|ZX_VM_PERM_WRITE, 0, vmo, 0, size, &ptr),
"map");
EXPECT_NE(ptr, 0, "map address");
p = (volatile uint32_t *)ptr;
// clone it and map that
clone_vmo = ZX_HANDLE_INVALID;
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone_vmo), "vm_clone");
EXPECT_NE(ZX_HANDLE_INVALID, clone_vmo, "vm_clone_handle");
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ|ZX_VM_PERM_WRITE, 0, clone_vmo, 0, size, &clone_ptr),
"map");
EXPECT_NE(clone_ptr, 0, "map address");
cp = (volatile uint32_t *)clone_ptr;
// write to parent and make sure clone sees it
memset((void*)p, 0x99, PAGE_SIZE);
EXPECT_EQ(0x99999999, p[0], "wrote to original");
EXPECT_EQ(0x99999999, cp[0], "read back from clone");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(clone_vmo, ZX_VMO_OP_COMMIT, 0, PAGE_SIZE, NULL, 0));
// make sure that clone has the same contents as the parent
for (size_t i = 0; i < PAGE_SIZE / sizeof(*p); ++i) {
EXPECT_EQ(0x99999999, cp[i], "read new page");
}
EXPECT_EQ(0x99999999, p[0], "read back from original");
// write to clone and make sure parent doesn't see it
cp[0] = 0;
EXPECT_EQ(0, cp[0], "wrote to clone");
EXPECT_EQ(0x99999999, p[0], "read back from original");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(clone_vmo, ZX_VMO_OP_DECOMMIT, 0, PAGE_SIZE, NULL, 0));
EXPECT_EQ(0x99999999, cp[0], "clone should match orig again");
EXPECT_EQ(0x99999999, p[0], "read back from original");
// close the original handle
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
// close the clone handle
EXPECT_EQ(ZX_OK, zx_handle_close(clone_vmo), "handle_close");
// unmap
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), ptr, size), "unmap");
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), clone_ptr, size), "unmap");
END_TEST;
}
bool vmo_cache_test() {
BEGIN_TEST;
zx_handle_t vmo;
const size_t size = PAGE_SIZE;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "creation for cache_policy");
// clean vmo can have all valid cache policies set
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_CACHED));
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_UNCACHED));
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_UNCACHED_DEVICE));
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_WRITE_COMBINING));
// bad cache policy
EXPECT_EQ(ZX_ERR_INVALID_ARGS, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_MASK + 1));
// commit a page, make sure the policy doesn't set
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, ZX_VMO_OP_COMMIT, 0, size, nullptr, 0));
EXPECT_EQ(ZX_ERR_BAD_STATE, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_CACHED));
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, ZX_VMO_OP_DECOMMIT, 0, size, nullptr, 0));
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_CACHED));
// map the vmo, make sure policy doesn't set
uintptr_t ptr;
EXPECT_EQ(ZX_OK, zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ, 0, vmo, 0, size, &ptr));
EXPECT_EQ(ZX_ERR_BAD_STATE, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_CACHED));
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), ptr, size));
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_CACHED));
// clone the vmo, make sure policy doesn't set
zx_handle_t clone;
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone));
EXPECT_EQ(ZX_ERR_BAD_STATE, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_CACHED));
EXPECT_EQ(ZX_OK, zx_handle_close(clone));
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_CACHED));
// clone the vmo, try to set policy on the clone
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone));
EXPECT_EQ(ZX_ERR_BAD_STATE, zx_vmo_set_cache_policy(clone, ZX_CACHE_POLICY_CACHED));
EXPECT_EQ(ZX_OK, zx_handle_close(clone));
// set the policy, make sure future clones do not go through
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_UNCACHED));
EXPECT_EQ(ZX_ERR_BAD_STATE, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone));
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_CACHED));
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone));
EXPECT_EQ(ZX_OK, zx_handle_close(clone));
// set the policy, make sure vmo read/write do not work
char c;
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_UNCACHED));
EXPECT_EQ(ZX_ERR_BAD_STATE, zx_vmo_read(vmo, &c, 0, sizeof(c)));
EXPECT_EQ(ZX_ERR_BAD_STATE, zx_vmo_write(vmo, &c, 0, sizeof(c)));
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, ZX_CACHE_POLICY_CACHED));
EXPECT_EQ(ZX_OK, zx_vmo_read(vmo, &c, 0, sizeof(c)));
EXPECT_EQ(ZX_OK, zx_vmo_write(vmo, &c, 0, sizeof(c)));
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "close handle");
END_TEST;
}
bool vmo_cache_map_test() {
BEGIN_TEST;
auto maptest = [](uint32_t policy, const char *type) {
zx_handle_t vmo;
const size_t size = 256*1024; // 256K
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo));
// set the cache policy
EXPECT_EQ(ZX_OK, zx_vmo_set_cache_policy(vmo, policy));
// commit it
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, ZX_VMO_OP_COMMIT, 0, size, nullptr, 0));
// map it
uintptr_t ptr;
EXPECT_EQ(ZX_OK, zx_vmar_map(zx_vmar_root_self(),
ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_MAP_RANGE,
0, vmo, 0, size, &ptr));
volatile uint32_t *buf = (volatile uint32_t *)ptr;
// write it once, priming the cache
for (size_t i = 0; i < size / 4; i++)
buf[i] = 0;
// write to it
zx_time_t wt = zx_clock_get_monotonic();
for (size_t i = 0; i < size / 4; i++)
buf[i] = 0;
wt = zx_clock_get_monotonic() - wt;
// read from it
zx_time_t rt = zx_clock_get_monotonic();
for (size_t i = 0; i < size / 4; i++)
__UNUSED uint32_t hole = buf[i];
rt = zx_clock_get_monotonic() - rt;
printf("took %" PRIu64 " nsec to write %s memory\n", wt, type);
printf("took %" PRIu64 " nsec to read %s memory\n", rt, type);
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), ptr, size));
EXPECT_EQ(ZX_OK, zx_handle_close(vmo));
};
printf("\n");
maptest(ZX_CACHE_POLICY_CACHED, "cached");
maptest(ZX_CACHE_POLICY_UNCACHED, "uncached");
maptest(ZX_CACHE_POLICY_UNCACHED_DEVICE, "uncached device");
maptest(ZX_CACHE_POLICY_WRITE_COMBINING, "write combining");
END_TEST;
}
bool vmo_cache_op_test() {
BEGIN_TEST;
zx_handle_t vmo;
const size_t size = 0x8000;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "creation for cache op");
auto t = [vmo](uint32_t op) {
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, op, 0, 1, nullptr, 0), "0 1");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, op, 0, 1, nullptr, 0), "0 1");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, op, 1, 1, nullptr, 0), "1 1");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, op, 0, size, nullptr, 0), "0 size");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, op, 1, size - 1, nullptr, 0), "0 size");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, op, 0x5200, 1, nullptr, 0), "0x5200 1");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, op, 0x5200, 0x800, nullptr, 0), "0x5200 0x800");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, op, 0x5200, 0x1000, nullptr, 0), "0x5200 0x1000");
EXPECT_EQ(ZX_OK, zx_vmo_op_range(vmo, op, 0x5200, 0x1200, nullptr, 0), "0x5200 0x1200");
EXPECT_EQ(ZX_ERR_INVALID_ARGS, zx_vmo_op_range(vmo, op, 0, 0, nullptr, 0), "0 0");
EXPECT_EQ(ZX_ERR_OUT_OF_RANGE, zx_vmo_op_range(vmo, op, 1, size, nullptr, 0), "0 size");
EXPECT_EQ(ZX_ERR_OUT_OF_RANGE, zx_vmo_op_range(vmo, op, size, 1, nullptr, 0), "size 1");
EXPECT_EQ(ZX_ERR_OUT_OF_RANGE, zx_vmo_op_range(vmo, op, size+1, 1, nullptr, 0), "size+1 1");
EXPECT_EQ(ZX_ERR_OUT_OF_RANGE, zx_vmo_op_range(vmo, op, UINT64_MAX-1, 1, nullptr, 0), "UINT64_MAX-1 1");
EXPECT_EQ(ZX_ERR_OUT_OF_RANGE, zx_vmo_op_range(vmo, op, UINT64_MAX, 1, nullptr, 0), "UINT64_MAX 1");
EXPECT_EQ(ZX_ERR_OUT_OF_RANGE, zx_vmo_op_range(vmo, op, UINT64_MAX, UINT64_MAX, nullptr, 0), "UINT64_MAX UINT64_MAX");
};
t(ZX_VMO_OP_CACHE_SYNC);
t(ZX_VMO_OP_CACHE_CLEAN);
t(ZX_VMO_OP_CACHE_CLEAN_INVALIDATE);
t(ZX_VMO_OP_CACHE_INVALIDATE);
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "close handle");
END_TEST;
}
bool vmo_cache_flush_test() {
BEGIN_TEST;
zx_handle_t vmo;
const size_t size = 0x8000;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "creation for cache op");
uintptr_t ptr_ro;
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ, 0, vmo, 0, size, &ptr_ro),
"map");
EXPECT_NE(ptr_ro, 0, "map address");
void *pro = (void*)ptr_ro;
uintptr_t ptr_rw;
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, 0, vmo, 0, size, &ptr_rw),
"map");
EXPECT_NE(ptr_rw, 0, "map address");
void *prw = (void*)ptr_rw;
zx_vmo_op_range(vmo, ZX_VMO_OP_COMMIT, 0, size, NULL, 0);
EXPECT_EQ(ZX_OK, zx_cache_flush(prw, size, ZX_CACHE_FLUSH_INSN), "rw flush insn");
EXPECT_EQ(ZX_OK, zx_cache_flush(prw, size, ZX_CACHE_FLUSH_DATA), "rw clean");
EXPECT_EQ(ZX_OK, zx_cache_flush(prw, size, ZX_CACHE_FLUSH_DATA | ZX_CACHE_FLUSH_INVALIDATE), "rw clean/invalidate");
EXPECT_EQ(ZX_OK, zx_cache_flush(pro, size, ZX_CACHE_FLUSH_INSN), "ro flush insn");
EXPECT_EQ(ZX_OK, zx_cache_flush(pro, size, ZX_CACHE_FLUSH_DATA), "ro clean");
EXPECT_EQ(ZX_OK, zx_cache_flush(pro, size, ZX_CACHE_FLUSH_DATA | ZX_CACHE_FLUSH_INVALIDATE), "ro clean/invalidate");
zx_vmar_unmap(zx_vmar_root_self(), ptr_rw, size);
zx_vmar_unmap(zx_vmar_root_self(), ptr_ro, size);
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "close handle");
END_TEST;
}
bool vmo_decommit_misaligned_test() {
BEGIN_TEST;
zx_handle_t vmo;
EXPECT_EQ(ZX_OK, zx_vmo_create(PAGE_SIZE * 2, 0, &vmo), "creation for decommit test");
zx_status_t status = zx_vmo_op_range(vmo, ZX_VMO_OP_DECOMMIT, 0x10, 0x100, NULL, 0);
EXPECT_EQ(ZX_OK, status, "decommitting uncommitted memory");
status = zx_vmo_op_range(vmo, ZX_VMO_OP_COMMIT, 0x10, 0x100, NULL, 0);
EXPECT_EQ(ZX_OK, status, "committing memory");
status = zx_vmo_op_range(vmo, ZX_VMO_OP_DECOMMIT, 0x10, 0x100, NULL, 0);
EXPECT_EQ(ZX_OK, status, "decommitting memory");
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "close handle");
END_TEST;
}
// test set 4: deal with clones with nonzero offsets and offsets that extend beyond the original
bool vmo_clone_test_4() {
BEGIN_TEST;
zx_handle_t vmo;
zx_handle_t clone_vmo[1];
uintptr_t ptr;
uintptr_t clone_ptr;
volatile size_t *p;
volatile size_t *cp;
// create a vmo
const size_t size = PAGE_SIZE * 4;
EXPECT_EQ(ZX_OK, zx_vmo_create(size, 0, &vmo), "vm_object_create");
// map it
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ|ZX_VM_PERM_WRITE, 0, vmo, 0, size, &ptr),
"map");
EXPECT_NE(ptr, 0, "map address");
p = (volatile size_t *)ptr;
// fill it with stuff
for (size_t off = 0; off < size / sizeof(off); off++)
p[off] = off;
// make sure that non page aligned clones do not work
clone_vmo[0] = ZX_HANDLE_INVALID;
EXPECT_EQ(ZX_ERR_INVALID_ARGS, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 1, size, &clone_vmo[0]), "vm_clone");
// create a clone that extends beyond the parent by one page
clone_vmo[0] = ZX_HANDLE_INVALID;
EXPECT_EQ(ZX_OK, zx_vmo_clone(vmo, ZX_VMO_CLONE_COPY_ON_WRITE, PAGE_SIZE, size, &clone_vmo[0]), "vm_clone");
// map the clone
EXPECT_EQ(ZX_OK,
zx_vmar_map(zx_vmar_root_self(), ZX_VM_PERM_READ|ZX_VM_PERM_WRITE, 0, clone_vmo[0], 0, size, &clone_ptr),
"map");
EXPECT_NE(clone_ptr, 0, "map address");
cp = (volatile size_t *)clone_ptr;
// verify that it seems to be mapping the original at an offset
for (size_t off = 0; off < (size - PAGE_SIZE) / sizeof(off); off++) {
if (cp[off] != off + PAGE_SIZE / sizeof(off)) {
EXPECT_EQ(cp[off], off + PAGE_SIZE / sizeof(off), "reading from clone");
break;
}
}
// verify that the last page we have mapped is beyond the original and should return zeros
for (size_t off = (size - PAGE_SIZE) / sizeof(off); off < size / sizeof(off); off++) {
if (cp[off] != 0) {
EXPECT_EQ(cp[off], 0, "reading from clone");
break;
}
}
// resize the original
EXPECT_EQ(ZX_OK, zx_vmo_set_size(vmo, size + PAGE_SIZE), "extend the vmo");
// verify that the last page we have mapped still returns zeros
for (size_t off = (size - PAGE_SIZE) / sizeof(off); off < size / sizeof(off); off++) {
if (cp[off] != 0) {
EXPECT_EQ(cp[off], 0, "reading from clone");
break;
}
}
// write to the new part of the original
size_t val = 99;
EXPECT_EQ(ZX_OK, zx_vmo_write(vmo, &val, size, sizeof(val)), "writing to original after extending");
// verify that it is reflected in the clone
EXPECT_EQ(99, cp[(size - PAGE_SIZE) / sizeof(*cp)], "modified newly exposed part of cow clone");
// resize the original again, completely extending it beyond he clone
EXPECT_EQ(ZX_OK, zx_vmo_set_size(vmo, size + PAGE_SIZE * 2), "extend the vmo");
// resize the original to zero
EXPECT_EQ(ZX_OK, zx_vmo_set_size(vmo, 0), "truncate the vmo");
// verify that the clone now reads completely zeros, since it never COWed
for (size_t off = 0; off < size / sizeof(off); off++) {
if (cp[off] != 0) {
EXPECT_EQ(cp[off], 0, "reading zeros from clone");
break;
}
}
// close and unmap
EXPECT_EQ(ZX_OK, zx_handle_close(vmo), "handle_close");
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), ptr, size), "unmap");
EXPECT_EQ(ZX_OK, zx_handle_close(clone_vmo[0]), "handle_close");
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), clone_ptr, size), "unmap");
END_TEST;
}
bool vmo_clone_rights_test() {
BEGIN_TEST;
static const char kOldVmoName[] = "original";
static const char kNewVmoName[] = "clone";
static const zx_rights_t kOldVmoRights =
ZX_RIGHT_READ | ZX_RIGHT_DUPLICATE;
static const zx_rights_t kNewVmoRights =
kOldVmoRights | ZX_RIGHT_WRITE |
ZX_RIGHT_GET_PROPERTY | ZX_RIGHT_SET_PROPERTY;
zx_handle_t vmo;
ASSERT_EQ(zx_vmo_create(PAGE_SIZE, 0, &vmo),
ZX_OK);
ASSERT_EQ(zx_object_set_property(vmo, ZX_PROP_NAME,
kOldVmoName, sizeof(kOldVmoName)),
ZX_OK);
ASSERT_EQ(get_handle_rights(vmo) & kOldVmoRights, kOldVmoRights);
zx_handle_t reduced_rights_vmo;
ASSERT_EQ(zx_handle_duplicate(vmo, kOldVmoRights, &reduced_rights_vmo),
ZX_OK);
EXPECT_EQ(get_handle_rights(reduced_rights_vmo), kOldVmoRights);
zx_handle_t clone;
ASSERT_EQ(zx_vmo_clone(reduced_rights_vmo, ZX_VMO_CLONE_COPY_ON_WRITE,
0, PAGE_SIZE, &clone),
ZX_OK);
EXPECT_EQ(zx_handle_close(reduced_rights_vmo), ZX_OK);
ASSERT_EQ(zx_object_set_property(clone, ZX_PROP_NAME,
kNewVmoName, sizeof(kNewVmoName)),
ZX_OK);
char oldname[ZX_MAX_NAME_LEN] = "bad";
EXPECT_EQ(zx_object_get_property(vmo, ZX_PROP_NAME,
oldname, sizeof(oldname)),
ZX_OK);
EXPECT_STR_EQ(oldname, kOldVmoName, "original VMO name");
char newname[ZX_MAX_NAME_LEN] = "bad";
EXPECT_EQ(zx_object_get_property(clone, ZX_PROP_NAME,
newname, sizeof(newname)),
ZX_OK);
EXPECT_STR_EQ(newname, kNewVmoName, "clone VMO name");
EXPECT_EQ(zx_handle_close(vmo), ZX_OK);
EXPECT_EQ(get_handle_rights(clone), kNewVmoRights);
EXPECT_EQ(zx_handle_close(clone), ZX_OK);
END_TEST;
}
// Resizing a regular mapped VMO causes a fault.
bool vmo_resize_hazard() {
BEGIN_TEST;
const size_t size = PAGE_SIZE * 2;
zx_handle_t vmo;
ASSERT_EQ(zx_vmo_create(size, 0, &vmo), ZX_OK);
uintptr_t ptr_rw;
EXPECT_EQ(ZX_OK, zx_vmar_map(
zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_PERM_WRITE,
0, vmo, 0, size, &ptr_rw), "map");
auto int_arr = reinterpret_cast<int*>(ptr_rw);
EXPECT_EQ(int_arr[1], 0);
EXPECT_EQ(ZX_OK, zx_vmo_set_size(vmo, 0u));
EXPECT_EQ(false, probe_for_read(&int_arr[1]), "read probe");
EXPECT_EQ(false, probe_for_write(&int_arr[1]), "write probe");
EXPECT_EQ(ZX_OK, zx_handle_close(vmo));
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), ptr_rw, size), "unmap");
END_TEST;
}
// Resizing a cloned VMO causes a fault.
bool vmo_clone_resize_clone_hazard() {
BEGIN_TEST;
const size_t size = PAGE_SIZE * 2;
zx_handle_t vmo;
ASSERT_EQ(zx_vmo_create(size, 0, &vmo), ZX_OK);
zx_handle_t clone_vmo;
EXPECT_EQ(ZX_OK, zx_vmo_clone(
vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone_vmo), "vm_clone");
uintptr_t ptr_rw;
EXPECT_EQ(ZX_OK, zx_vmar_map(
zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, 0,
clone_vmo, 0, size, &ptr_rw), "map");
auto int_arr = reinterpret_cast<int*>(ptr_rw);
EXPECT_EQ(int_arr[1], 0);
EXPECT_EQ(ZX_OK, zx_vmo_set_size(clone_vmo, 0u));
EXPECT_EQ(false, probe_for_read(&int_arr[1]), "read probe");
EXPECT_EQ(false, probe_for_write(&int_arr[1]), "write probe");
EXPECT_EQ(ZX_OK, zx_handle_close(vmo));
EXPECT_EQ(ZX_OK, zx_handle_close(clone_vmo));
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), ptr_rw, size), "unmap");
END_TEST;
}
// Resizing the parent VMO and accessing via a mapped VMO is ok.
bool vmo_clone_resize_parent_ok() {
BEGIN_TEST;
const size_t size = PAGE_SIZE * 2;
zx_handle_t vmo;
ASSERT_EQ(zx_vmo_create(size, 0, &vmo), ZX_OK);
zx_handle_t clone_vmo;
EXPECT_EQ(ZX_OK, zx_vmo_clone(
vmo, ZX_VMO_CLONE_COPY_ON_WRITE, 0, size, &clone_vmo), "vm_clone");
uintptr_t ptr_rw;
EXPECT_EQ(ZX_OK, zx_vmar_map(
zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, 0,
clone_vmo, 0, size, &ptr_rw), "map");
auto int_arr = reinterpret_cast<int*>(ptr_rw);
EXPECT_EQ(int_arr[1], 0);
EXPECT_EQ(ZX_OK, zx_vmo_set_size(vmo, 0u));
EXPECT_EQ(true, probe_for_read(&int_arr[1]), "read probe");
EXPECT_EQ(true, probe_for_write(&int_arr[1]), "write probe");
EXPECT_EQ(ZX_OK, zx_handle_close(vmo));
EXPECT_EQ(ZX_OK, zx_handle_close(clone_vmo));
EXPECT_EQ(ZX_OK, zx_vmar_unmap(zx_vmar_root_self(), ptr_rw, size), "unmap");
END_TEST;
}
bool vmo_unmap_coherency() {
BEGIN_TEST;
// This is an expensive test to try to detect a multi-cpu coherency
// problem with TLB flushing of unmap operations
//
// algorithm: map a relatively large committed VMO.
// Create a worker thread that simply walks through the VMO writing to
// each page.
// In the main thread continually decommit the vmo with a little bit of
// a gap between decommits to allow the worker thread to bring it all back in.
// If the worker thread appears stuck by not making it through a loop in
// a reasonable time, we have failed.
// allocate a vmo
const size_t len = 32*1024*1024;
zx_handle_t vmo;
zx_status_t status = zx_vmo_create(len, 0, &vmo);
EXPECT_EQ(ZX_OK, status, "vm_object_create");
// do a regular map
uintptr_t ptr = 0;
status = zx_vmar_map(zx_vmar_root_self(),
ZX_VM_PERM_READ | ZX_VM_PERM_WRITE,
0, vmo, 0, len, &ptr);
EXPECT_EQ(ZX_OK, status, "map");
EXPECT_NE(0u, ptr, "map address");
// create a worker thread
struct worker_args {
size_t len;
uintptr_t ptr;
fbl::atomic<bool> exit;
fbl::atomic<bool> exited;
fbl::atomic<size_t> count;
} args = {};
args.len = len;
args.ptr = ptr;
auto worker = [](void *_args) -> int {
worker_args* a = (worker_args*)_args;
unittest_printf("ptr %#" PRIxPTR " len %zu\n",
a->ptr, a->len);
while (!a->exit.load()) {
// walk through the mapping, writing to every page
for (size_t off = 0; off < a->len; off += PAGE_SIZE) {
*(uint32_t*)(a->ptr + off) = 99;
}
a->count.fetch_add(1);
}
unittest_printf("exiting worker\n");
a->exited.store(true);
return 0;
};
thrd_t t;
thrd_create(&t, worker, &args);
const zx_time_t max_duration = ZX_SEC(30);
const zx_time_t max_wait = ZX_SEC(1);
zx_time_t start = zx_clock_get_monotonic();
for (;;) {
// wait for it to loop at least once
zx_time_t t = zx_clock_get_monotonic();
size_t last_count = args.count.load();
while (args.count.load() <= last_count) {
if (zx_clock_get_monotonic() - t > max_wait) {
UNITTEST_FAIL_TRACEF("looper appears stuck!\n");
break;
}
}
// decommit the vmo
status = zx_vmo_op_range(vmo, ZX_VMO_OP_DECOMMIT, 0, len, nullptr, 0);
EXPECT_EQ(0, status, "vm decommit");
if (zx_clock_get_monotonic() - start > max_duration)
break;
}
// stop the thread and wait for it to exit
args.exit.store(true);
while (args.exited.load() == false)
;
END_TEST;
}
BEGIN_TEST_CASE(vmo_tests)
RUN_TEST(vmo_create_test);
RUN_TEST(vmo_read_write_test);
RUN_TEST(vmo_read_write_range_test);
RUN_TEST(vmo_map_test);
RUN_TEST(vmo_read_only_map_test);
RUN_TEST(vmo_no_perm_map_test);
RUN_TEST(vmo_no_perm_protect_test);
RUN_TEST(vmo_resize_test);
RUN_TEST(vmo_no_resize_test);
RUN_TEST(vmo_no_resize_clone_test);
RUN_TEST(vmo_size_align_test);
RUN_TEST(vmo_resize_align_test);
RUN_TEST(vmo_clone_size_align_test);
RUN_TEST(vmo_rights_test);
RUN_TEST(vmo_commit_test);
RUN_TEST(vmo_decommit_misaligned_test);
RUN_TEST(vmo_cache_test);
RUN_TEST_PERFORMANCE(vmo_cache_map_test);
RUN_TEST(vmo_cache_op_test);
RUN_TEST(vmo_cache_flush_test);
RUN_TEST(vmo_zero_page_test);
RUN_TEST(vmo_clone_test_1);
RUN_TEST(vmo_clone_test_2);
RUN_TEST(vmo_clone_test_3);
RUN_TEST(vmo_clone_test_4);
RUN_TEST(vmo_clone_decommit_test);
RUN_TEST(vmo_clone_commit_test);
RUN_TEST(vmo_clone_rights_test);
RUN_TEST(vmo_resize_hazard);
RUN_TEST(vmo_clone_resize_clone_hazard);
RUN_TEST(vmo_clone_resize_parent_ok);
RUN_TEST(vmo_info_test);
RUN_TEST_LARGE(vmo_unmap_coherency);
END_TEST_CASE(vmo_tests)
int main(int argc, char** argv) {
bool run_bench = false;
if (argc > 1) {
if (!strcmp(argv[1], "bench")) {
run_bench = true;
}
}
if (!run_bench) {
bool success = unittest_run_all_tests(argc, argv);
return success ? 0 : -1;
} else {
return vmo_run_benchmark();
}
}