Emit various bits of OS process info into the eventlog

The process ID, parent process ID, rts name and version
The program arguments and environment.

1 files changed, 49 insertions, 0 deletions

diff --git a/rts/Trace.c b/rts/Trace.c
index faa54d7741..e472c5ade7 100644
--- a/rts/Trace.c
+++ b/rts/Trace.c
@@ -15,11 +15,16 @@
 #ifdef TRACING
 
 #include "GetTime.h"
+#include "GetEnv.h"
 #include "Stats.h"
 #include "eventlog/EventLog.h"
 #include "Threads.h"
 #include "Printer.h"
 
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
 #ifdef DEBUG
 // debugging flags, set with +RTS -D<something>
 int DEBUG_sched;
@@ -284,6 +289,50 @@ void traceCapsetModify_ (EventTypeNum tag,
     }
 }
 
+void traceOSProcessInfo_(void) {
+    if (eventlog_enabled) {
+        postCapsetModifyEvent(EVENT_OSPROCESS_PID,
+                              CAPSET_OSPROCESS_DEFAULT,
+                              getpid());
+
+#if !defined(cygwin32_HOST_OS) && !defined (mingw32_HOST_OS)
+/* Windows has no strong concept of process heirarchy, so no getppid().
+ * In any case, this trace event is mainly useful for tracing programs
+ * that use 'forkProcess' which Windows doesn't support anyway.
+ */
+        postCapsetModifyEvent(EVENT_OSPROCESS_PPID,
+                              CAPSET_OSPROCESS_DEFAULT,
+                              getppid());
+#endif
+        {
+            char buf[256];
+            snprintf(buf, sizeof(buf), "GHC-%s %s", ProjectVersion, RtsWay);
+            postCapsetStrEvent(EVENT_RTS_IDENTIFIER,
+                               CAPSET_OSPROCESS_DEFAULT,
+                               buf);
+        }
+        {
+            int argc = 0; char **argv;
+            getFullProgArgv(&argc, &argv);
+            if (argc != 0) {
+                postCapsetVecEvent(EVENT_PROGRAM_ARGS,
+                                   CAPSET_OSPROCESS_DEFAULT,
+                                   argc, argv);
+            }
+        }
+        {
+            int envc = 0; char **envv;
+            getProgEnvv(&envc, &envv);
+            if (envc != 0) {
+                postCapsetVecEvent(EVENT_PROGRAM_ENV,
+                                   CAPSET_OSPROCESS_DEFAULT,
+                                   envc, envv);
+            }
+            freeProgEnvv(envc, envv);
+        }
+    }
+}
+
 void traceEvent_ (Capability *cap, EventTypeNum tag)
 {
 #ifdef DEBUG