Fixes some memory leaks in //runtime/bin

runtime/bin/process_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_LINUX)
 
 #include "bin/process.h"
 
 #include <errno.h>  // NOLINT
 #include <fcntl.h>  // NOLINT
 #include <poll.h>  // NOLINT
 #include <stdio.h>  // NOLINT
 #include <stdlib.h>  // NOLINT
 #include <string.h>  // NOLINT
 #include <sys/wait.h>  // NOLINT
 #include <unistd.h>  // NOLINT
 
+#include "bin/dartutils.h"
 #include "bin/fdutils.h"
 #include "bin/lockers.h"
 #include "bin/log.h"
 #include "bin/thread.h"
 #include "platform/signal_blocker.h"
 #include "platform/utils.h"
 
 
 extern char **environ;
 
@@ skipping 598 matching lines @@
       ReportChildError();
     }
     VOID_TEMP_FAILURE_RETRY(close(read_err_[1]));
   }
 
 
   int CleanupAndReturnError() {
     int actual_errno = errno;
     // If CleanupAndReturnError is called without an actual errno make
     // sure to return an error anyway.
-    if (actual_errno == 0) actual_errno = EPERM;
+    if (actual_errno == 0) {
+      actual_errno = EPERM;
+    }
     SetChildOsErrorMessage();
     CloseAllPipes();
     return actual_errno;
   }
 
 
   void SetChildOsErrorMessage() {
     const int kBufferSize = 1024;
-    char error_buf[kBufferSize];
-    *os_error_message_ = strdup(Utils::StrError(errno, error_buf, kBufferSize));
+    char* error_message = DartUtils::ScopedCString(kBufferSize);
+    Utils::StrError(errno, error_message, kBufferSize);
+    *os_error_message_ = error_message;
   }
 
 
   void ReportChildError() {
     // In the case of failure in the child process write the errno and
     // the OS error message to the exec control pipe and exit.
     int child_errno = errno;
     const int kBufferSize = 1024;
     char error_buf[kBufferSize];
     char* os_error_message = Utils::StrError(errno, error_buf, kBufferSize);
@@ skipping 14 matching lines @@
     // is communicated using the exec control pipe.
     int bytes_written =
         FDUtils::WriteToBlocking(exec_control_[1], &pid, sizeof(pid));
     ASSERT(bytes_written == sizeof(int));
     USE(bytes_written);
   }
 
 
   void ReadChildError() {
     const int kMaxMessageSize = 256;
-    char* message = static_cast<char*>(malloc(kMaxMessageSize));
+    char* message = DartUtils::ScopedCString(kMaxMessageSize);
     if (message != NULL) {
       FDUtils::ReadFromBlocking(exec_control_[0], message, kMaxMessageSize);
       message[kMaxMessageSize - 1] = '\0';
       *os_error_message_ = message;
     } else {
       // Could not get error message. It will be NULL.
       ASSERT(*os_error_message_ == NULL);
     }
   }
 
@@ skipping 301 matching lines @@
     bzero(&act, sizeof(act));
     act.sa_handler = SIG_DFL;
     sigaction(signal, &act, NULL);
   }
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)