#define RTS_LIBGCC_SYMBOLS
#endif
+/* NOTE [io-manager-ghci]
+
+ When GHCi loads the base package, it gets another copy of the CAFs
+ in GHC.Conc that record the IO manager's ThreadId, and the blocking
+ queues, so we get another IO manager. This is bad enough, but what
+ is worse is that GHCi by default reverts all CAFs on every :load,
+ so we'll get *another* IO manager thread (and an associated pipe)
+ every time the user does :load. Miraculously, this actually
+ manages to just about work in GHC 6.10 and earlier, but broke when
+ I tried to fix #1185 (restarting the IO manager after a fork()).
+
+ To work around it and ensure that we only have a single IO manager,
+ we map the CAFs in the dynamically-loaded GHC.Conc to the
+ statically-linked GHC.Conc. This is an ugly hack, but it's the
+ least ugly hack that I could think of (SDM 3/11/2009)
+*/
+
+#define RTS_GHC_CONC_SYMBOLS \
+ SymI_NeedsProto(base_GHCziConc_pendingDelays_closure) \
+ SymI_NeedsProto(base_GHCziConc_ioManagerThread_closure)
+
+#ifdef mingw32_HOST_OS
+#define RTS_GHC_CONC_OS_SYMBOLS /* empty */
+#else
+#define RTS_GHC_CONC_OS_SYMBOLS \
+ SymI_NeedsProto(base_GHCziConc_pendingEvents_closure) \
+ SymI_NeedsProto(base_GHCziConc_prodding_closure) \
+ SymI_NeedsProto(base_GHCziConc_sync_closure) \
+ SymI_NeedsProto(base_GHCziConc_stick_closure)
+#endif
+
#if defined(darwin_HOST_OS) && defined(powerpc_HOST_ARCH)
// Symbols that don't have a leading underscore
// on Mac OS X. They have to receive special treatment,
RTS_DARWIN_ONLY_SYMBOLS
RTS_LIBGCC_SYMBOLS
RTS_LIBFFI_SYMBOLS
+RTS_GHC_CONC_SYMBOLS
+RTS_GHC_CONC_OS_SYMBOLS
#undef SymI_NeedsProto
#undef SymI_HasProto
#undef SymI_HasProto_redirect
RTS_DARWIN_ONLY_SYMBOLS
RTS_LIBGCC_SYMBOLS
RTS_LIBFFI_SYMBOLS
+ RTS_GHC_CONC_SYMBOLS
+ RTS_GHC_CONC_OS_SYMBOLS
#if defined(darwin_HOST_OS) && defined(i386_HOST_ARCH)
// dyld stub code contains references to this,
// but it should never be called because we treat
void *data
)
{
- if (lookupHashTable(table, (StgWord)key) == NULL)
- {
+#define GHC_CONC MAYBE_LEADING_UNDERSCORE_STR("base_GHCziConc")
+
+ if (lookupHashTable(table, (StgWord)key) == NULL)
+ {
insertStrHashTable(table, (StgWord)key, data);
return;
- }
- debugBelch(
+ }
+ if (strncmp(key, GHC_CONC, strlen(GHC_CONC)) == 0) {
+ /* see NOTE [io-manager-ghci] */
+ return;
+ }
+ debugBelch(
"\n\n"
"GHCi runtime linker: fatal error: I found a duplicate definition for symbol\n"
" %s\n"
"\n",
(char*)key,
obj_name
- );
- exit(1);
+ );
+ exit(1);
}
/* -----------------------------------------------------------------------------
* initialize the object linker