Upstreaming Cygprofile for Android.

tools/cygprofile/cygprofile_android_unittest.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Test is intended to be executed on an Android device.  The device should
+// have an sd card, and should have a /sdcard/profile directory already created
+// before running the test, because the test will dump the log file into that
+// directory.  The test will enable order profiling, call some functions and
+// then disable profiling.  The test will then check that the calls were
+// properly logged in the log file.  Since the first entry of a function is
+// logged, the profiling should log the following:
+//   00008000-00023000 r-xp 00000000 b3:02 12322 /data/local/tmp/cygprofile_test
+//   secs       msecs        pid:threadid           func
+//   START
+//   1315416566 712405       1818:1074467944        function2_addr
+//   1315416566 712457       1818:1074467944        function1_addr
+//   1315416566 712483       1818:1074467944        function3_addr
+//   END
+// This is medium-sized unittest because it will first write the log file
+// during profiling and then reads the file to make sure it contains the correct
+// output.  The test passes on normal exit (i.e. a 0 return value from main).
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "./cygprofile_android.h"
+
+// Used to mod (i.e. %) seconds with to truncate the length.  It seems
+// reasonable to expect logged calls to be at most 999 seconds apart.
+const int kTruncateSecs = 1000;
+
+int function1(void) {
+  return 0;
+}
+
+int function2(void) {
+  return function1 () + 1;
+}
+
+int function3(void) {
+  return function2 () + 1;
+}
+
+int check_logfile(void) {
+  // Check results to see if test passed.
+  FILE* fp;
+  char line[256];
+  int linenum = 0;
+  char* str;
+  char* res;
+  unsigned long seconds, mtime, tid;
+  unsigned long lastsecs, lastmtime, lasttid;
+  int pid, addr, lastpid;
+
+  // The test is to be run on an Android device with a sd card.  Before running
+  // the test there should be a /sdcard/profile directory created on the device.
+  if ((fp=fopen("/sdcard/profile/logfile.out", "r")) == NULL) {
+    printf("FAIL: could not open log file: Does directory /sdcard/profile exist?\n");
+    return -1;
+  }
+
+  // Expect exactly 7 lines in log file
+  for (linenum = 0; linenum < 7; linenum++) {
+    if (fgets(line, sizeof(line), fp) == NULL) {
+      printf("FAIL: log file does not contain correct number of lines\n");
+      return -1;
+    }
+
+    // Make sure line 2 is START, last line is END, and the correct calls
+    // are profiled on lines 3, 4 and 5.
+    switch (linenum) {
+      case 2:
+        str = strtok_r(line, " \n", &res);
+        if (strcmp("START", str) != 0) {
+          printf("FAIL: START not found where expected\n");
+          return -1;
+        }
+        break;
+      case 3:
+        sscanf(line, "%ld %ld\t%d:%ld\t%x\n", &lastsecs, &lastmtime, &lastpid,
+               &lasttid, &addr);
+        lastsecs = lastsecs % kTruncateSecs;
+        if (reinterpret_cast<void*>(addr) != &function2) {
+          // Test failed
+          printf("FAIL: function2 call not found where expected\n");
+          printf("  line = %s, function2 = %p\n", line, &function2);
+          return -1;
+        }
+        // fprintf (stdout, "addr: %x, %p equal=%d\n", addr, &function2, ;
+        break;
+      case 4:
+        sscanf(line, "%ld %ld\t%d:%ld\t%x\n", &seconds, &mtime, &pid, &tid,
+               &addr);
+        seconds = seconds % kTruncateSecs;
+        if (reinterpret_cast<void*>(addr) != &function1 || pid != lastpid ||
+            tid != lasttid ||
+            ((seconds * 1000000) + mtime) < ((lastsecs * 100000) + lastmtime)) {
+          // Test failed
+          // printf("addr = %p, function1 = %p, pid = %d, lastpid = %d\n",
+          //        reinterpret_cast<void*>(addr), &function1, pid, lastpid);
+          // printf("seconds = %ld, mtime = %ld, lastsecs = %ld, lastmtime = %d\n",
+          //        seconds, mtime, lastsecs, lastmtime);
+          // printf("condition4: %ld < %ld\n",
+          //        ((seconds * 1000000) + mtime), ((lastsecs * 100000) + lastmtime));
+          printf("FAIL: function1 call not found where expected\n");
+          return -1;
+        }
+        lastsecs = seconds;
+        lastmtime = mtime;
+        lastpid = pid;
+        lasttid = tid;
+        break;
+      case 5:
+        sscanf(line, "%ld %ld\t%d:%ld\t%x\n", &seconds, &mtime, &pid, &tid,
+               &addr);
+        if (reinterpret_cast<void*>(addr) != &function3 || pid != lastpid ||
+            tid != lasttid ||
+            ((seconds * 1000000) + mtime) < ((lastsecs * 100000) + lastmtime)) {
+          // Test failed
+          printf("FAIL: function3 call not found where expected\n");
+          return -1;
+        }
+        break;
+      case 6:
+        str = strtok_r(line, " \n", &res);
+        // sscanf(line, "%s%*s", str);
+        if (strcmp("END", str) != 0) {
+          printf("FAIL: END not found where expected\n");
+          return -1;
+        }
+        break;
+      default:
+        break;
+    }
+  }
+
+  return 0;
+}
+
+int main(void) {
+  int result, passed;
+  cygprofile::cygprofile_start("/sdcard/profile/logfile.out");
+  function2();
+  result = function3();
+  cygprofile::cygprofile_end();
+
+  function2();
+  passed = check_logfile();
+  if (passed < 0)
+    printf("test failed.\n");
+  else
+    printf("test passed.\n");
+  return passed;
+}