Give the runtime loader a chance to reinit its semaphore after fork().

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21886 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/user_runtime.h

@@ -39,6 +39,8 @@ struct rld_export {
 	status_t (*get_next_image_dependency)(image_id id, uint32 *cookie,
 		const char **_name);
 
+	status_t (*reinit_after_fork)();
+
 	const struct user_space_program_args *program_args;
 };
 

src/system/libroot/posix/unistd/fork.c

@@ -4,13 +4,15 @@
  */
 
 
-#include <syscalls.h>
 #include <fork.h>
 
 #include <unistd.h>
 #include <stdlib.h>
 #include <errno.h>
 
+#include <syscalls.h>
+#include <user_runtime.h>
+
 
 typedef struct fork_hook {
 	struct fork_hook *next;
@@ -153,6 +155,7 @@ fork(void)
 		// ToDo: initialize child
 		__main_thread_id = find_thread(NULL);
 		__init_fork();
+		__gRuntimeLoader->reinit_after_fork();
 
 		call_fork_hooks(sChildHooks);
 	} else {

src/system/runtime_loader/elf.cpp

@@ -1670,3 +1670,14 @@ rldelf_init(void)
 		sErrorMessage.SetTo(buffer, 1024, 'Rler');
 	}
 }
+
+
+status_t
+elf_reinit_after_fork()
+{
+	rld_sem = create_sem(1, "rld_lock");
+	if (rld_sem < 0)
+		return rld_sem;
+
+	return B_OK;
+}

src/system/runtime_loader/export.c

@@ -34,7 +34,9 @@ struct rld_export gRuntimeLoader = {
 	get_symbol,
 	get_nth_symbol,
 	test_executable,
-	get_next_image_dependency
+	get_next_image_dependency,
+
+	elf_reinit_after_fork
 };
 
 

src/system/runtime_loader/runtime_loader_private.h

@@ -44,6 +44,7 @@ int resolve_symbol(image_t *rootImage, image_t *image, struct Elf32_Sym *sym,
 status_t elf_verify_header(void *header, int32 length);
 void rldelf_init(void);
 void rldexport_init(void);
+status_t elf_reinit_after_fork();
 
 status_t heap_init(void);