Revised CL for customisable logging (replacing printfs).

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 "bin/process.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <poll.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
 #include "bin/fdutils.h"
+#include "bin/log.h"
 #include "bin/thread.h"
 
 extern char **environ;
 
 // ProcessInfo is used to map a process id to the file descriptor for
 // the pipe used to communicate the exit code of the process to Dart.
 // ProcessInfo objects are kept in the static singly-linked
 // ProcessInfoList.
 class ProcessInfo {
  public:
@@ skipping 292 matching lines @@
   pid_t pid;
   int read_in[2];  // Pipe for stdout to child process.
   int read_err[2];  // Pipe for stderr to child process.
   int write_out[2];  // Pipe for stdin to child process.
   int exec_control[2];  // Pipe to get the result from exec.
   int result;
 
   bool initialized = ExitCodeHandler::EnsureInitialized();
   if (!initialized) {
     SetChildOsErrorMessage(os_error_message, os_error_message_len);
-    fprintf(stderr,
+    Log::PrintErr(
             "Error initializing exit code handler: %s\n",
             os_error_message);
     return errno;
   }
 
   result = TEMP_FAILURE_RETRY(pipe(read_in));
   if (result < 0) {
     SetChildOsErrorMessage(os_error_message, os_error_message_len);
-    fprintf(stderr, "Error pipe creation failed: %s\n", os_error_message);
+    Log::PrintErr("Error pipe creation failed: %s\n", os_error_message);
     return errno;
   }
 
   result = TEMP_FAILURE_RETRY(pipe(read_err));
   if (result < 0) {
     SetChildOsErrorMessage(os_error_message, os_error_message_len);
     TEMP_FAILURE_RETRY(close(read_in[0]));
     TEMP_FAILURE_RETRY(close(read_in[1]));
-    fprintf(stderr, "Error pipe creation failed: %s\n", os_error_message);
+    Log::PrintErr("Error pipe creation failed: %s\n", os_error_message);
     return errno;
   }
 
   result = TEMP_FAILURE_RETRY(pipe(write_out));
   if (result < 0) {
     SetChildOsErrorMessage(os_error_message, os_error_message_len);
     TEMP_FAILURE_RETRY(close(read_in[0]));
     TEMP_FAILURE_RETRY(close(read_in[1]));
     TEMP_FAILURE_RETRY(close(read_err[0]));
     TEMP_FAILURE_RETRY(close(read_err[1]));
-    fprintf(stderr, "Error pipe creation failed: %s\n", os_error_message);
+    Log::PrintErr("Error pipe creation failed: %s\n", os_error_message);
     return errno;
   }
 
   result = TEMP_FAILURE_RETRY(pipe(exec_control));
   if (result < 0) {
     SetChildOsErrorMessage(os_error_message, os_error_message_len);
     TEMP_FAILURE_RETRY(close(read_in[0]));
     TEMP_FAILURE_RETRY(close(read_in[1]));
     TEMP_FAILURE_RETRY(close(read_err[0]));
     TEMP_FAILURE_RETRY(close(read_err[1]));
     TEMP_FAILURE_RETRY(close(write_out[0]));
     TEMP_FAILURE_RETRY(close(write_out[1]));
-    fprintf(stderr, "Error pipe creation failed: %s\n", os_error_message);
+    Log::PrintErr("Error pipe creation failed: %s\n", os_error_message);
     return errno;
   }
 
   // Set close on exec on the write file descriptor of the exec control pipe.
   result = TEMP_FAILURE_RETRY(
       fcntl(exec_control[1],
             F_SETFD,
             TEMP_FAILURE_RETRY(fcntl(exec_control[1], F_GETFD)) | FD_CLOEXEC));
   if (result < 0) {
     SetChildOsErrorMessage(os_error_message, os_error_message_len);
     TEMP_FAILURE_RETRY(close(read_in[0]));
     TEMP_FAILURE_RETRY(close(read_in[1]));
     TEMP_FAILURE_RETRY(close(read_err[0]));
     TEMP_FAILURE_RETRY(close(read_err[1]));
     TEMP_FAILURE_RETRY(close(write_out[0]));
     TEMP_FAILURE_RETRY(close(write_out[1]));
     TEMP_FAILURE_RETRY(close(exec_control[0]));
     TEMP_FAILURE_RETRY(close(exec_control[1]));
-    fprintf(stderr, "fcntl failed: %s\n", os_error_message);
+    Log::PrintErr("fcntl failed: %s\n", os_error_message);
     return errno;
   }
 
   char** program_arguments = new char*[arguments_length + 2];
   program_arguments[0] = const_cast<char*>(path);
   for (int i = 0; i < arguments_length; i++) {
     program_arguments[i + 1] = arguments[i];
   }
   program_arguments[arguments_length + 1] = NULL;
 
@@ skipping 78 matching lines @@
   int event_fds[2];
   result = TEMP_FAILURE_RETRY(pipe(event_fds));
   if (result < 0) {
     SetChildOsErrorMessage(os_error_message, os_error_message_len);
     TEMP_FAILURE_RETRY(close(read_in[0]));
     TEMP_FAILURE_RETRY(close(read_in[1]));
     TEMP_FAILURE_RETRY(close(read_err[0]));
     TEMP_FAILURE_RETRY(close(read_err[1]));
     TEMP_FAILURE_RETRY(close(write_out[0]));
     TEMP_FAILURE_RETRY(close(write_out[1]));
-    fprintf(stderr, "Error pipe creation failed: %s\n", os_error_message);
+    Log::PrintErr("Error pipe creation failed: %s\n", os_error_message);
     return errno;
   }
 
   ProcessInfoList::AddProcess(pid, event_fds[1]);
   *exit_event = event_fds[0];
   FDUtils::SetNonBlocking(event_fds[0]);
 
   // Notify child process to start.
   char msg = '1';
   result = FDUtils::WriteToBlocking(read_in[1], &msg, sizeof(msg));
@@ skipping 55 matching lines @@
 
 
 void Process::TerminateExitCodeHandler() {
   ExitCodeHandler::TerminateExitCodeThread();
 }
 
 
 intptr_t Process::CurrentProcessId() {
   return static_cast<intptr_t>(getpid());
 }