Use system properties for heap profiler in Android instead of environment variables.

third_party/tcmalloc/chromium/src/base/sysinfo.cc

 // Copyright (c) 2006, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 12 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <config.h>
 #if (defined(_WIN32) || defined(__MINGW32__)) && !defined(__CYGWIN__) && !defined(__CYGWIN32)
 # define PLATFORM_WINDOWS 1
+#elif defined(__ANDROID__) || defined(ANDROID)
+# define PLATFORM_ANDROID 1
 #endif
 
 #include <ctype.h>    // for isspace()
 #include <stdlib.h>   // for getenv()
 #include <stdio.h>    // for snprintf(), sscanf()
 #include <string.h>   // for memmove(), memchr(), etc.
 #include <fcntl.h>    // for open()
 #include <errno.h>    // for errno
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>   // for read()
 #endif
 #if defined __MACH__          // Mac OS X, almost certainly
 #include <mach-o/dyld.h>      // for iterating over dll's in ProcMapsIter
 #include <mach-o/loader.h>    // for iterating over dll's in ProcMapsIter
 #include <sys/types.h>
 #include <sys/sysctl.h>       // how we figure out numcpu's on OS X
 #elif defined __FreeBSD__
 #include <sys/sysctl.h>
 #elif defined __sun__         // Solaris
 #include <procfs.h>           // for, e.g., prmap_t
 #elif defined(PLATFORM_WINDOWS)
 #include <process.h>          // for getpid() (actually, _getpid())
 #include <shlwapi.h>          // for SHGetValueA()
 #include <tlhelp32.h>         // for Module32First()
+#elif defined(PLATFORM_ANDROID)
+#include <sys/system_properties.h>
 #endif
 #include "base/sysinfo.h"
 #include "base/commandlineflags.h"
 #include "base/dynamic_annotations.h"   // for RunningOnValgrind
 #include "base/logging.h"
 #include "base/cycleclock.h"
 
 #ifdef PLATFORM_WINDOWS
 #ifdef MODULEENTRY32
 // In a change from the usual W-A pattern, there is no A variant of
@@ skipping 118 matching lines @@
 // the high bit of the 1st char of CPUPROFILE.  In the child, we
 // notice the high bit is set and append the pid().  This works
 // assuming cpuprofile filenames don't normally have the high bit set
 // in their first character!  If that assumption is violated, we'll
 // still get a profile, but one with an unexpected name.
 // TODO(csilvers): set an envvar instead when we can do it reliably.
 //
 // In Chromium this hack is intentionally disabled, because the path is not
 // re-initialized upon fork.
 bool GetUniquePathFromEnv(const char* env_name, char* path) {
+#if defined(PLATFORM_ANDROID)
+  char envval[PROP_VALUE_MAX];
+  __system_property_get(env_name, envval);
+#else
   char* envval = getenv(env_name);
+#endif
   if (envval == NULL || *envval == '\0')
     return false;
   if (envval[0] & 128) {                  // high bit is set
     snprintf(path, PATH_MAX, "%c%s_%u",   // add pid and clear high bit
              envval[0] & 127, envval+1, (unsigned int)(getpid()));
   } else {
     snprintf(path, PATH_MAX, "%s", envval);
 #if 0
     envval[0] |= 128;                     // set high bit for kids to see
 #endif
@@ skipping 916 matching lines @@
   ProcMapsIterator::Buffer linebuf;
   while (it.Next(&start, &end, &flags, &offset, &inode, &filename)) {
     int written = it.FormatLine(linebuf.buf_, sizeof(linebuf.buf_),
                                 start, end, flags, offset, inode, filename,
                                 0);
     RawWrite(fd, linebuf.buf_, written);
   }
 }
 
 }  // namespace tcmalloc