From ca74dd50e111af589f62face92f7ee50c7655f32 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fredrik=20H=C3=BCbinette=20=28Hubbe=29?= <hubbe@hubbe.net>
Date: Tue, 8 Oct 1996 06:24:50 +0200
Subject: [PATCH] dynamic module loading implemented
Rev: src/ChangeLog:1.8
Rev: src/Makefile.src:1.10
Rev: src/configure.in:1.7
Rev: src/dynamic_load.c:1.1
Rev: src/dynamic_load.h:1.1
Rev: src/machine.h.in:1.6
Rev: src/main.c:1.7
Rev: src/stralloc.c:1.2
Rev: src/stralloc.h:1.2
---
src/ChangeLog | 5 ++
src/Makefile.src | 1 +
src/configure.in | 5 +-
src/dynamic_load.c | 125 +++++++++++++++++++++++++++++++++++++++++++++
src/dynamic_load.h | 11 ++++
src/machine.h.in | 9 ++++
src/main.c | 3 +-
src/stralloc.c | 11 ++--
src/stralloc.h | 1 +
9 files changed, 165 insertions(+), 6 deletions(-)
create mode 100644 src/dynamic_load.c
create mode 100644 src/dynamic_load.h
diff --git a/src/ChangeLog b/src/ChangeLog
index 4c11cfa588..80e3989f0a 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+Tue Oct 8 06:19:19 1996 Fredrik Hubinette <hubbe@cuckoo.infovav.se>
+
+ * New efun: load module
+ * bug in copy_mapping fixed
+
Sat Oct 5 02:53:14 1996 Fredrik Hubinette <hubbe@teleute.infovav.se>
* /precompiled/fifo added (with #include <fifo.h>)
diff --git a/src/Makefile.src b/src/Makefile.src
index 374e6ca126..41491904a8 100644
--- a/src/Makefile.src
+++ b/src/Makefile.src
@@ -75,6 +75,7 @@ OBJ= \
callback.o \
docode.o \
dynamic_buffer.o \
+ dynamic_load.o \
error.o \
fd_control.o \
fsort.o \
diff --git a/src/configure.in b/src/configure.in
index 611db64d84..73c7e4768c 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -245,7 +245,7 @@ AC_HEADER_TIME
AC_HEADER_STDC
AC_CHECK_HEADERS(sys/rusage.h time.h sys/time.h sys/types.h unistd.h stdlib.h \
memory.h values.h string.h fcntl.h sys/filio.h sys/sockio.h crypt.h locale.h \
-sys/resource.h sys/select.h sys/mman.h setjmp.h limits.h pthread.h)
+sys/resource.h sys/select.h sys/mman.h setjmp.h limits.h pthread.h dlfcn.h)
AC_SIZEOF_TYPE(char *)
AC_SIZEOF_TYPE(long)
@@ -265,6 +265,7 @@ dnl AC_CHECK_LIB(PW, alloca)
dnl AC_CHECK_LIB(crypt, crypt)
AC_CHECK_LIB(m, floor)
+AC_CHECK_LIB(dl, dlopen)
if test "${ac_cv_lib_m}" = "no" -a "${pike_cv_sys_os}" = "Linux"; then
AC_MSG_WARN(I will compensate for this by adding -lc -lm)
@@ -367,6 +368,8 @@ AC_CHECK_FUNCS(
wait4 \
waitpid \
munmap \
+ dlopen \
+ dlsym \
)
AC_STRUCT_TM
diff --git a/src/dynamic_load.c b/src/dynamic_load.c
new file mode 100644
index 0000000000..0992ea00ef
--- /dev/null
+++ b/src/dynamic_load.c
@@ -0,0 +1,125 @@
+#include "global.h"
+
+#if !defined(HAVE_DLFCN_H) || !defined(HAVE_DLSYM) || !defined(HAVE_DLOPEN)
+#undef HAVE_DLOPEN
+#endif
+
+#ifdef HAVE_DLOPEN
+#include "interpret.h"
+#include "constants.h"
+#include "error.h"
+#include "module.h"
+#include "stralloc.h"
+#include "macros.h"
+#include <dlfcn.h>
+
+struct module_list
+{
+ struct module_list * next;
+ void *module;
+ struct module mod;
+};
+
+struct module_list *dynamic_module_list = 0;
+
+void f_load_module(INT32 args)
+{
+ void *module;
+ struct module_list *new_module;
+
+ if(sp[-args].type != T_STRING)
+ error("Bad argument 1 to load_module()\n");
+ module=dlopen(sp[-args].u.string->str, RTLD_NOW);
+ pop_stack();
+
+ if(module)
+ {
+ struct module *tmp;
+ void *init, *init2, *exit;
+ init=dlsym(module, "init_module_efuns");
+ init2=dlsym(module, "init_module_programs");
+ exit=dlsym(module, "exit_module");
+
+ if(!init || !init2 || !exit)
+ {
+ char *foo, buf1[1024], buf2[1024];
+ foo=STRRCHR(sp[-args].u.string->str,'/');
+ if(!foo) foo=sp[-args].u.string->str;
+ foo++;
+ if(strlen(foo) < 1000)
+ {
+ strcpy(buf1, foo);
+ foo=buf1;
+
+ while((*foo <= 'a' && *foo >= 'z' ) || (*foo <= 'A' && *foo >= 'Z' ))
+ foo++;
+
+ *foo=0;
+
+ strcpy(buf2,"init_");
+ strcat(buf2,buf1);
+ strcat(buf2,"_efuns");
+ init=dlsym(module, buf2);
+
+ strcpy(buf2,"init_");
+ strcat(buf2,buf1);
+ strcat(buf2,"_programs");
+ init2=dlsym(module, buf2);
+
+ strcpy(buf2,"exit_");
+ strcat(buf2,buf1);
+ exit=dlsym(module, buf2);
+ }
+ }
+
+ if(!init || !init2 || !exit)
+ error("Failed to initialize module.\n");
+
+ new_module=ALLOC_STRUCT(module_list);
+ new_module->next=dynamic_module_list;
+ dynamic_module_list=new_module;
+ new_module->module=module;
+ new_module->mod.init_efuns=init;
+ new_module->mod.init_programs=init2;
+ new_module->mod.exit=exit;
+ new_module->mod.refs=0;
+
+ tmp=current_module;
+ current_module=& new_module->mod;
+
+ (*(fun)init)();
+ (*(fun)init2)();
+
+ current_module=tmp;
+
+ push_int(1);
+ } else {
+ push_int(0);
+ }
+}
+
+
+#endif
+
+void init_dynamic_load()
+{
+#ifdef HAVE_DLOPEN
+ add_efun("load_module",f_load_module,"function(string:int)",OPT_SIDE_EFFECT);
+#endif
+}
+
+void exit_dynamic_load()
+{
+#ifdef HAVE_DLOPEN
+ while(dynamic_module_list)
+ {
+ struct module_list *tmp=dynamic_module_list;
+ dynamic_module_list=tmp->next;
+ (*tmp->mod.exit)();
+ dlclose(tmp->module);
+ free((char *)tmp);
+ }
+#endif
+}
+
+
diff --git a/src/dynamic_load.h b/src/dynamic_load.h
new file mode 100644
index 0000000000..fb9ef46ea3
--- /dev/null
+++ b/src/dynamic_load.h
@@ -0,0 +1,11 @@
+#ifndef DYNAMIC_LOAD_H
+#define DYNAMIC_LOAD_H
+
+/* Prototypes begin here */
+struct module_list;
+void f_load_module(INT32 args);
+void init_dynamic_load();
+void exit_dynamic_load();
+/* Prototypes end here */
+
+#endif
diff --git a/src/machine.h.in b/src/machine.h.in
index d05f671ebf..26f1c88c89 100644
--- a/src/machine.h.in
+++ b/src/machine.h.in
@@ -335,4 +335,13 @@
#undef _REENTRANT
#undef _THREAD_SAFE
+/* Define this if you have dlopen() */
+#define HAVE_DLOPEN
+
+/* Define this if you have dlsym() */
+#define HAVE_DLSYM
+
+/* Define this if you have <dlfcn.h> */
+#define HAVE_DLFCN_H
+
#endif /* MACHINE_H */
diff --git a/src/main.c b/src/main.c
index 99e2e9ff1e..16e86ff9fe 100644
--- a/src/main.c
+++ b/src/main.c
@@ -253,6 +253,7 @@ void init_main_efuns()
init_builtin_efuns();
init_signals();
th_init();
+ init_dynamic_load();
}
void init_main_programs()
@@ -268,7 +269,7 @@ void exit_main()
void cleanup_program();
th_cleanup();
-
+ exit_dynamic_load();
cleanup_objects();
exit_signals();
exit_lex();
diff --git a/src/stralloc.c b/src/stralloc.c
index 646a889700..ee04da58a7 100644
--- a/src/stralloc.c
+++ b/src/stralloc.c
@@ -102,13 +102,16 @@ static struct pike_string *internal_findstring(const char *s,int len,int h)
return 0; /* not found */
}
-struct pike_string *findstring(const char *foo)
+struct pike_string *binary_findstring(const char *foo, INT32 l)
{
- int l;
- l=strlen(foo);
return internal_findstring(foo, l, StrHash(foo,l));
}
+struct pike_string *findstring(const char *foo)
+{
+ return binary_findstring(foo, strlen(foo));
+}
+
/*
* find a string that is already shared and move it to the head
* of that list in the hastable
@@ -148,6 +151,7 @@ struct pike_string *begin_shared_string(int len)
{
struct pike_string *t;
t=(struct pike_string *)xalloc(len + sizeof(struct pike_string));
+ t->str[len]=0;
t->len=len;
return t;
}
@@ -166,7 +170,6 @@ struct pike_string *end_shared_string(struct pike_string *s)
free((char *)s);
s=s2;
}else{
- s->str[len]=0;
s->refs = 0;
s->next = base_table[h];
base_table[h] = s;
diff --git a/src/stralloc.h b/src/stralloc.h
index f6e63b2cb2..c9979ccf87 100644
--- a/src/stralloc.h
+++ b/src/stralloc.h
@@ -34,6 +34,7 @@ struct pike_string *debug_findstring(const struct pike_string *foo);
/* Prototypes begin here */
void check_string(struct pike_string *s);
void verify_shared_strings_tables();
+struct pike_string *binary_findstring(const char *foo, INT32 len);
struct pike_string *findstring(const char *foo);
struct pike_string *debug_findstring(const struct pike_string *foo);
struct pike_string *begin_shared_string(int len);
--
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