1 files changed, 105 insertions, 0 deletions
diff --git a/libunwindstack/tests/MemoryRangeTest.cpp b/libunwindstack/tests/MemoryRangeTest.cpp
new file mode 100644
index 000000000..2d4f141ab
--- /dev/null
+++ b/libunwindstack/tests/MemoryRangeTest.cpp
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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 <stdint.h>
+
+#include <memory>
+#include <vector>
+
+#include <gtest/gtest.h>
+
+#include "MemoryFake.h"
+#include "MemoryRange.h"
+
+namespace unwindstack {
+
+class MemoryRangeTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+    process_memory_.reset();
+    memory_fake_ = new MemoryFake;
+    process_memory_.reset(memory_fake_);
+  }
+
+  std::shared_ptr<Memory> process_memory_;
+  MemoryFake* memory_fake_ = nullptr;
+};
+
+TEST_F(MemoryRangeTest, read_fully) {
+  memory_fake_->SetMemoryBlock(9000, 2048, 0x4c);
+
+  MemoryRange range(process_memory_, 9001, 1024, 0);
+
+  std::vector<uint8_t> dst(1024);
+  ASSERT_TRUE(range.ReadFully(0, dst.data(), dst.size()));
+  for (size_t i = 0; i < dst.size(); i++) {
+    ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
+  }
+}
+
+TEST_F(MemoryRangeTest, read_fully_near_limit) {
+  memory_fake_->SetMemoryBlock(0, 8192, 0x4c);
+
+  MemoryRange range(process_memory_, 1000, 1024, 0);
+
+  std::vector<uint8_t> dst(1024);
+  ASSERT_TRUE(range.ReadFully(1020, dst.data(), 4));
+  for (size_t i = 0; i < 4; i++) {
+    ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
+  }
+
+  // Verify that reads outside of the range will fail.
+  ASSERT_FALSE(range.ReadFully(1020, dst.data(), 5));
+  ASSERT_FALSE(range.ReadFully(1024, dst.data(), 1));
+  ASSERT_FALSE(range.ReadFully(1024, dst.data(), 1024));
+
+  // Verify that reading up to the end works.
+  ASSERT_TRUE(range.ReadFully(1020, dst.data(), 4));
+}
+
+TEST_F(MemoryRangeTest, read_fully_overflow) {
+  std::vector<uint8_t> buffer(100);
+
+  std::shared_ptr<Memory> process_memory(new MemoryFakeAlwaysReadZero);
+  std::unique_ptr<MemoryRange> overflow(new MemoryRange(process_memory, 100, 200, 0));
+  ASSERT_FALSE(overflow->ReadFully(UINT64_MAX - 10, buffer.data(), 100));
+}
+
+TEST_F(MemoryRangeTest, read) {
+  memory_fake_->SetMemoryBlock(0, 4096, 0x4c);
+
+  MemoryRange range(process_memory_, 1000, 1024, 0);
+
+  std::vector<uint8_t> dst(1024);
+  ASSERT_EQ(4U, range.Read(1020, dst.data(), dst.size()));
+  for (size_t i = 0; i < 4; i++) {
+    ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
+  }
+}
+
+TEST_F(MemoryRangeTest, read_non_zero_offset) {
+  memory_fake_->SetMemoryBlock(1000, 1024, 0x12);
+
+  MemoryRange range(process_memory_, 1000, 1024, 400);
+
+  std::vector<uint8_t> dst(1024);
+  ASSERT_EQ(1024U, range.Read(400, dst.data(), dst.size()));
+  for (size_t i = 0; i < dst.size(); i++) {
+    ASSERT_EQ(0x12U, dst[i]) << "Failed at byte " << i;
+  }
+}
+
+}  // namespace unwindstack