1 files changed, 101 insertions, 0 deletions
diff --git a/libunwindstack/tests/MemoryRangeTest.cpp b/libunwindstack/tests/MemoryRangeTest.cpp
new file mode 100644
index 000000000..fcae3a4c4
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+++ b/libunwindstack/tests/MemoryRangeTest.cpp
@@ -0,0 +1,101 @@
+/*
+ * 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 <string.h>
+
+#include <vector>
+
+#include <gtest/gtest.h>
+
+#include "Memory.h"
+
+#include "LogFake.h"
+#include "MemoryFake.h"
+
+class MemoryRangeTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+    ResetLogs();
+    memory_ = new MemoryFake;
+  }
+
+  MemoryFake* memory_;
+};
+
+TEST_F(MemoryRangeTest, read) {
+  std::vector<uint8_t> src(1024);
+  memset(src.data(), 0x4c, 1024);
+  memory_->SetMemory(9001, src);
+
+  MemoryRange range(memory_, 9001, 9001 + src.size());
+
+  std::vector<uint8_t> dst(1024);
+  ASSERT_TRUE(range.Read(0, dst.data(), src.size()));
+  for (size_t i = 0; i < 1024; i++) {
+    ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
+  }
+}
+
+TEST_F(MemoryRangeTest, read_near_limit) {
+  std::vector<uint8_t> src(4096);
+  memset(src.data(), 0x4c, 4096);
+  memory_->SetMemory(1000, src);
+
+  MemoryRange range(memory_, 1000, 2024);
+
+  std::vector<uint8_t> dst(1024);
+  ASSERT_TRUE(range.Read(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.Read(1020, dst.data(), 5));
+  ASSERT_FALSE(range.Read(1024, dst.data(), 1));
+  ASSERT_FALSE(range.Read(1024, dst.data(), 1024));
+}
+
+TEST_F(MemoryRangeTest, read_string_past_end) {
+  std::string name("0123456789");
+  memory_->SetMemory(0, name);
+
+  // Verify a read past the range fails.
+  MemoryRange range(memory_, 0, 5);
+  std::string dst_name;
+  ASSERT_FALSE(range.ReadString(0, &dst_name));
+}
+
+TEST_F(MemoryRangeTest, read_string_to_end) {
+  std::string name("0123456789");
+  memory_->SetMemory(30, name);
+
+  // Verify the range going to the end of the string works.
+  MemoryRange range(memory_, 30, 30 + name.size() + 1);
+  std::string dst_name;
+  ASSERT_TRUE(range.ReadString(0, &dst_name));
+  ASSERT_EQ("0123456789", dst_name);
+}
+
+TEST_F(MemoryRangeTest, read_string_fencepost) {
+  std::string name("0123456789");
+  memory_->SetMemory(10, name);
+
+  // Verify the range set to one byte less than the end of the string fails.
+  MemoryRange range(memory_, 10, 10 + name.size());
+  std::string dst_name;
+  ASSERT_FALSE(range.ReadString(0, &dst_name));
+}