Tool to replay memory allocation recordings.
Included with the tool are a set of app memory recordings that
can be used to judge the abilities of the native memory
allocator.
Verified the full flow by running valgrind on the host version on all
the current dumps and verifying that there are no leak, and no errors.
Change-Id: I756224991f04b61ba26c692a30a37aad0c9fb163
diff --git a/memory_replay/LineBuffer.cpp b/memory_replay/LineBuffer.cpp
new file mode 100644
index 0000000..5e65ad6
--- /dev/null
+++ b/memory_replay/LineBuffer.cpp
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2015 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 <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "LineBuffer.h"
+
+LineBuffer::LineBuffer(int fd, char* buffer, size_t buffer_len) : fd_(fd), buffer_(buffer), buffer_len_(buffer_len) {
+}
+
+bool LineBuffer::GetLine(char** line, size_t* line_len) {
+ while (true) {
+ if (bytes_ > 0) {
+ char* newline = reinterpret_cast<char*>(memchr(buffer_ + start_, '\n', bytes_));
+ if (newline != nullptr) {
+ *newline = '\0';
+ *line = buffer_ + start_;
+ start_ = newline - buffer_ + 1;
+ bytes_ -= newline - *line + 1;
+ *line_len = newline - *line;
+ return true;
+ }
+ }
+ if (start_ > 0) {
+ // Didn't find anything, copy the current to the front of the buffer.
+ memmove(buffer_, buffer_ + start_, bytes_);
+ start_ = 0;
+ }
+ ssize_t bytes = TEMP_FAILURE_RETRY(read(fd_, buffer_ + bytes_, buffer_len_ - bytes_ - 1));
+ if (bytes <= 0) {
+ if (bytes_ > 0) {
+ // The read data might not contain a nul terminator, so add one.
+ buffer_[bytes_] = '\0';
+ *line = buffer_ + start_;
+ *line_len = bytes_;
+ bytes_ = 0;
+ start_ = 0;
+ return true;
+ }
+ return false;
+ }
+ bytes_ += bytes;
+ }
+}
