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

1 files changed, 78 insertions, 0 deletions

diff --git a/memory_replay/NativeInfo.cpp b/memory_replay/NativeInfo.cpp
new file mode 100644
index 00000000..b88eaf68
--- /dev/null
+++ b/memory_replay/NativeInfo.cpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2014 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 <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "LineBuffer.h"
+#include "NativeInfo.h"
+
+// This function is not re-entrant since it uses a static buffer for
+// the line data.
+void GetNativeInfo(int smaps_fd, size_t* pss_bytes, size_t* va_bytes) {
+  static char map_buffer[65535];
+  LineBuffer line_buf(smaps_fd, map_buffer, sizeof(map_buffer));
+  char* line;
+  size_t total_pss_bytes = 0;
+  size_t total_va_bytes = 0;
+  size_t line_len;
+  bool native_map = false;
+  while (line_buf.GetLine(&line, &line_len)) {
+    uintptr_t start, end;
+    int name_pos;
+    size_t native_pss_kB;
+    if (sscanf(line, "%" SCNxPTR "-%" SCNxPTR " %*4s %*x %*x:%*x %*d %n",
+        &start, &end, &name_pos) == 2) {
+      if (strcmp(line + name_pos, "[anon:libc_malloc]") == 0 ||
+          strcmp(line + name_pos, "[heap]") == 0) {
+        total_va_bytes += end - start;
+        native_map = true;
+      } else {
+        native_map = false;
+      }
+    } else if (native_map && sscanf(line, "Pss: %zu", &native_pss_kB) == 1) {
+      total_pss_bytes += native_pss_kB * 1024;
+    }
+  }
+  close(smaps_fd);
+  *pss_bytes = total_pss_bytes;
+  *va_bytes = total_va_bytes;
+}
+
+void PrintNativeInfo(const char* preamble) {
+  size_t pss_bytes;
+  size_t va_bytes;
+
+  int smaps_fd = open("/proc/self/smaps", O_RDONLY);
+  if (smaps_fd == -1) {
+    err(1, "Cannot open /proc/self/smaps: %s\n", strerror(errno));
+  }
+
+  GetNativeInfo(smaps_fd, &pss_bytes, &va_bytes);
+  printf("%sNative PSS: %zu bytes %0.2fMB\n", preamble, pss_bytes, pss_bytes/(1024*1024.0));
+  printf("%sNative VA Space: %zu bytes %0.2fMB\n", preamble, va_bytes, va_bytes/(1024*1024.0));
+  fflush(stdout);
+
+  close(smaps_fd);
+}