mmap() errors on Darwin: use errorBelch/exit instead of barf()

The most likely cause is out-of-memory, not an RTS error.

diff --git a/ghc/rts/MBlock.c b/ghc/rts/MBlock.c
index 331982d..8e07ee5 100644 (file)
--- a/ghc/rts/MBlock.c
+++ b/ghc/rts/MBlock.c
@@ -181,10 +181,14 @@ my_mmap (void *addr, lnat size)
     if(!addr || err)   // try to allocate anywhere
        err = vm_allocate(mach_task_self(),(vm_address_t*) &ret, size, TRUE);
        
-    if(err) // don't know what the error codes mean exactly
-       barf("memory allocation failed (requested %lu bytes)", size);
-    else
+    if(err) {
+       // don't know what the error codes mean exactly, assume it's
+       // not our problem though.
+       errorBelch("memory allocation failed (requested %lu bytes)", size);
+       stg_exit(EXIT_FAILURE);
+    } else {
        vm_protect(mach_task_self(),ret,size,FALSE,VM_PROT_READ|VM_PROT_WRITE);
+    }
 #else
     ret = mmap(addr, size, PROT_READ | PROT_WRITE | PROT_EXEC, 
               MAP_ANON | MAP_PRIVATE, -1, 0);