From 1d590434ea2ff2409abb05179e26311df06d7db6 Mon Sep 17 00:00:00 2001
From: Charlie Fenton <charlief@example.com>
Date: Fri, 12 Jul 2013 18:35:47 -0700
Subject: [PATCH] client: Fix a race condition on system reboot when using a
 child process for detecting GPUs, add debugging support to child process.

---
 client/gpu_detect.cpp |  9 ++++++++-
 client/main.cpp       | 11 +++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/client/gpu_detect.cpp b/client/gpu_detect.cpp
index 8139e9a78e..c5cb739dd0 100644
--- a/client/gpu_detect.cpp
+++ b/client/gpu_detect.cpp
@@ -437,6 +437,10 @@ int COPROCS::launch_child_process_to_detect_gpus() {
     int retval = 0;
     
     boinc_delete_file(COPROC_INFO_FILENAME);
+    for (i=0; i<300; ++i) {
+        if (!boinc_file_exists(COPROC_INFO_FILENAME)) break;
+        boinc_sleep(0.01);
+    }
     
     boinc_getcwd(dataDir);
 
@@ -502,7 +506,10 @@ int COPROCS::launch_child_process_to_detect_gpus() {
     }
     
     for (i=0; i<300; ++i) {
-        if (!process_exists(prog)) break;
+        if (boinc_file_exists(COPROC_INFO_FILENAME) &&
+            !process_exists(prog)) {
+            break;
+        }
         boinc_sleep(0.01);
     }
     
diff --git a/client/main.cpp b/client/main.cpp
index 2f641f0b6a..d3ffec120f 100644
--- a/client/main.cpp
+++ b/client/main.cpp
@@ -261,6 +261,17 @@ static void do_gpu_detection(int argc, char** argv) {
     
     boinc_install_signal_handlers();
     gstate.parse_cmdline(argc, argv);
+    gstate.now = dtime();
+
+    int flags =
+        BOINC_DIAG_DUMPCALLSTACKENABLED |
+        BOINC_DIAG_HEAPCHECKENABLED |
+        BOINC_DIAG_TRACETOSTDOUT |
+        BOINC_DIAG_REDIRECTSTDERR |
+        BOINC_DIAG_REDIRECTSTDOUT;
+
+    diagnostics_init(flags, "stdoutgpudetect", "stderrgpudetect");
+
     read_config_file(true);
 
     coprocs.detect_gpus(warnings);