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c8a016b99d
BUG=837308 R=mark@chromium.org Change-Id: Ibecbfc7bc2d61ee54bc1114e4b20978adbc77db2 Reviewed-on: https://chromium-review.googlesource.com/c/1393921 Reviewed-by: Mark Mentovai <mark@chromium.org> Commit-Queue: Avi Drissman <avi@chromium.org>
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
// Copyright 2017 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/process/process_memory_range.h"
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#include <limits>
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#include "base/logging.h"
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#include "build/build_config.h"
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#include "gtest/gtest.h"
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#include "test/process_type.h"
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#include "util/misc/arraysize.h"
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#include "util/misc/from_pointer_cast.h"
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#include "util/process/process_memory_native.h"
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namespace crashpad {
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namespace test {
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namespace {
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struct TestObject {
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char string1[16];
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char string2[16];
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} kTestObject = {"string1", "string2"};
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TEST(ProcessMemoryRange, Basic) {
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#if defined(ARCH_CPU_64_BITS)
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constexpr bool is_64_bit = true;
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#else
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constexpr bool is_64_bit = false;
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#endif // ARCH_CPU_64_BITS
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ProcessMemoryNative memory;
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ASSERT_TRUE(memory.Initialize(GetSelfProcess()));
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ProcessMemoryRange range;
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ASSERT_TRUE(range.Initialize(&memory, is_64_bit));
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EXPECT_EQ(range.Is64Bit(), is_64_bit);
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// Both strings are accessible within the object's range.
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auto object_addr = FromPointerCast<VMAddress>(&kTestObject);
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EXPECT_TRUE(range.RestrictRange(object_addr, sizeof(kTestObject)));
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TestObject object;
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ASSERT_TRUE(range.Read(object_addr, sizeof(object), &object));
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EXPECT_EQ(memcmp(&object, &kTestObject, sizeof(object)), 0);
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std::string string;
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auto string1_addr = FromPointerCast<VMAddress>(kTestObject.string1);
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auto string2_addr = FromPointerCast<VMAddress>(kTestObject.string2);
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ASSERT_TRUE(range.ReadCStringSizeLimited(
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string1_addr, ArraySize(kTestObject.string1), &string));
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EXPECT_STREQ(string.c_str(), kTestObject.string1);
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ASSERT_TRUE(range.ReadCStringSizeLimited(
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string2_addr, ArraySize(kTestObject.string2), &string));
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EXPECT_STREQ(string.c_str(), kTestObject.string2);
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// Limit the range to remove access to string2.
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ProcessMemoryRange range2;
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ASSERT_TRUE(range2.Initialize(range));
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ASSERT_TRUE(
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range2.RestrictRange(string1_addr, ArraySize(kTestObject.string1)));
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EXPECT_TRUE(range2.ReadCStringSizeLimited(
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string1_addr, ArraySize(kTestObject.string1), &string));
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EXPECT_FALSE(range2.ReadCStringSizeLimited(
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string2_addr, ArraySize(kTestObject.string2), &string));
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EXPECT_FALSE(range2.Read(object_addr, sizeof(object), &object));
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// String reads fail if the NUL terminator is outside the range.
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ASSERT_TRUE(range2.RestrictRange(string1_addr, strlen(kTestObject.string1)));
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EXPECT_FALSE(range2.ReadCStringSizeLimited(
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string1_addr, ArraySize(kTestObject.string1), &string));
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// New range outside the old range.
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EXPECT_FALSE(range2.RestrictRange(string1_addr - 1, 1));
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}
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} // namespace
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} // namespace test
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} // namespace crashpad
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