Add an --install-signal-handlers=<yes|no> RTS flag; fixes trac #804

[ghc-hetmet.git] / rts / RtsFlags.c

diff --git a/rts/RtsFlags.c b/rts/RtsFlags.c
index 43d527b..2dbd241 100644 (file)
--- a/rts/RtsFlags.c
+++ b/rts/RtsFlags.c
@@ -165,6 +165,7 @@ void initRtsFlagsDefaults(void)
     RtsFlags.DebugFlags.par            = rtsFalse;
     RtsFlags.DebugFlags.linker         = rtsFalse;
     RtsFlags.DebugFlags.squeeze                = rtsFalse;
+    RtsFlags.DebugFlags.hpc            = rtsFalse;
 #endif
 
 #if defined(PROFILING) || defined(PAR)
@@ -193,6 +194,8 @@ void initRtsFlagsDefaults(void)
     RtsFlags.MiscFlags.tickInterval    = 50;  /* In milliseconds */
     RtsFlags.ConcFlags.ctxtSwitchTime  = 50;  /* In milliseconds */
 
+    RtsFlags.MiscFlags.install_signal_handlers = rtsTrue;
+
 #ifdef THREADED_RTS
     RtsFlags.ParFlags.nNodes           = 1;
     RtsFlags.ParFlags.migrate           = rtsTrue;
@@ -303,7 +306,8 @@ void initRtsFlagsDefaults(void)
     RtsFlags.TraceFlags.sched          = rtsFalse;
 
 #ifdef USE_PAPI
-    RtsFlags.PapiFlags.eventType        = PAPI_FLAG_BRANCH;
+    /* By default no special measurements taken */
+    RtsFlags.PapiFlags.eventType        = 0;
 #endif
 }
 
@@ -426,6 +430,7 @@ usage_text[] = {
 "  -Dl  DEBUG: linker",
 "  -Dm  DEBUG: stm",
 "  -Dz  DEBUG: stack squezing",
+"  -Dc  DEBUG: program coverage",
 "",
 #endif /* DEBUG */
 #if defined(THREADED_RTS) && !defined(NOSMP)
@@ -433,6 +438,8 @@ usage_text[] = {
 "  -qm       Don't automatically migrate threads between CPUs",
 "  -qw       Migrate a thread to the current CPU when it is woken up",
 #endif
+"  --install-signal-handlers=<yes|no>",
+"            Install signal handlers (default: yes)",
 #if defined(THREADED_RTS) || defined(PAR)
 "  -e<size>  Size of spark pools (default 100)",
 #endif
@@ -462,6 +469,7 @@ usage_text[] = {
 "            2 - level 2 cache misses",
 "            b - branch mispredictions",
 "            s - stalled cycles",
+"            e - cache miss and branch misprediction events",
 #endif
 "",
 "RTS options may also be specified using the GHCRTS environment variable.",
@@ -653,6 +661,23 @@ error = rtsTrue;
                error = rtsTrue;
                break;
 
+              /* This isn't going to allow us to keep related options
+                 together as we add more --* flags. We really need a
+                 proper options parser. */
+             case '-':
+                  if (strequal("install-signal-handlers=yes",
+                               &rts_argv[arg][2])) {
+                      RtsFlags.MiscFlags.install_signal_handlers = rtsTrue;
+                  }
+                  else if (strequal("install-signal-handlers=no",
+                               &rts_argv[arg][2])) {
+                      RtsFlags.MiscFlags.install_signal_handlers = rtsFalse;
+                  }
+                  else {
+                     errorBelch("unknown RTS option: %s",rts_argv[arg]);
+                     error = rtsTrue;
+                  }
+                 break;
              case 'A':
                RtsFlags.GcFlags.minAllocAreaSize
                  = decode(rts_argv[arg]+2) / BLOCK_SIZE;
@@ -676,6 +701,9 @@ error = rtsTrue;
                case 's':
                  RtsFlags.PapiFlags.eventType = PAPI_FLAG_STALLS;
                  break;
+               case 'e':
+                 RtsFlags.PapiFlags.eventType = PAPI_FLAG_CB_EVENTS;
+                 break;
                default:
                  bad_option( rts_argv[arg] );
                }
@@ -754,6 +782,9 @@ error = rtsTrue;
                      case 'z':
                          RtsFlags.DebugFlags.squeeze = rtsTrue;
                          break;
+                     case 'c':
+                         RtsFlags.DebugFlags.hpc = rtsTrue;
+                         break;
                      default:
                          bad_option( rts_argv[arg] );
                      }