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Import of the watch repository from Pebble

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Matthieu Jeanson 2024-12-12 16:43:03 -08:00 • committed by Katharine Berry
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tests/fw/test_memory_layout.c Normal file
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/*
* Copyright 2024 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "clar.h"
#include "kernel/memory_layout.h"
#include "stubs_logging.h"
#include "stubs_mpu.h"
#include "stubs_passert.h"
#include "stubs_serial.h"
// Tests
///////////////////////////////////////////////////////////
void test_memory_layout__pointer_in_region(void) {
MpuRegion region = {
.base_address = 1000,
.size = 1000
};
cl_assert(!memory_layout_is_pointer_in_region(&region, (void*) 0));
cl_assert(!memory_layout_is_pointer_in_region(&region, (void*) 999));
cl_assert(memory_layout_is_pointer_in_region(&region, (void*) 1000));
cl_assert(memory_layout_is_pointer_in_region(&region, (void*) 1500));
cl_assert(memory_layout_is_pointer_in_region(&region, (void*) 1999));
cl_assert(!memory_layout_is_pointer_in_region(&region, (void*) 2000));
cl_assert(!memory_layout_is_pointer_in_region(&region, (void*) 9999));
}
void test_memory_layout__cstring_in_region(void) {
const char buffer[] = "yyyxxxstrstr\0badstrxxxyyy";
const char *valid_str = buffer + 6; // skip yyyxxx, equal to "strstr"
const char *invalid_str = buffer + 6 + 7; // skip yyyxxx + strstr\0, equal to "badstr" but no trailing null
MpuRegion region = {
.base_address = (uintptr_t) buffer + 3, // Skip leading yyy
.size = sizeof(buffer) - 1 - 3 - 3 // Skip trailing null, leading yyy, trailing yyy
};
// In the leading y's region
cl_assert(!memory_layout_is_cstring_in_region(&region, buffer, 10));
// Valid string
cl_assert(memory_layout_is_cstring_in_region(&region, valid_str, 10));
// Max length is not long enough to find the null
cl_assert(!memory_layout_is_cstring_in_region(&region, valid_str, 3));
// Invalid string, there is a null after the y's but the y's should be after the end of the region
cl_assert(!memory_layout_is_cstring_in_region(&region, invalid_str, 100));
// Invalid string, no null.
cl_assert(!memory_layout_is_cstring_in_region(&region, invalid_str, 3));
}