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/**************************************************************************/
/* */
/* OCaml */
/* */
/* Alain Frisch, projet Gallium, INRIA Rocquencourt */
/* */
/* Copyright 2007 Institut National de Recherche en Informatique et */
/* en Automatique. */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
#define CAML_INTERNALS
#include "caml/misc.h"
#include "caml/mlvalues.h"
#include "caml/memory.h"
#include "caml/stack.h"
#include "caml/callback.h"
#include "caml/codefrag.h"
#include "caml/alloc.h"
#include "caml/intext.h"
#include "caml/osdeps.h"
#include "caml/fail.h"
#include "caml/frame_descriptors.h"
#include "caml/globroots.h"
#include "caml/signals.h"
#include "caml/hooks.h"
intnat caml_globals_inited = 0;
CAMLexport void (*caml_natdynlink_hook)(void* handle, const char* unit) = NULL;
#include <stdio.h>
#include <string.h>
#include <limits.h>
/* This should match the value of Compilenv.symbol_separator */
#ifdef _MSC_VER
#define CAML_SYM_SEPARATOR "$"
#else
#define CAML_SYM_SEPARATOR "."
#endif
#define Handle_val(v) (*((void **) Data_abstract_val(v)))
static value Val_handle(void* handle) {
value res = caml_alloc_small(1, Abstract_tag);
Handle_val(res) = handle;
return res;
}
static void *getsym(void *handle, const char *module, const char *name){
char *fullname;
fullname = caml_stat_strconcat(4, "caml", module, CAML_SYM_SEPARATOR, name);
void *sym;
sym = caml_dlsym (handle, fullname);
/* printf("%s => %lx\n", fullname, (uintnat) sym); */
caml_stat_free(fullname);
return sym;
}
extern char caml_globals_map[];
CAMLprim value caml_natdynlink_getmap(value unit)
{
return caml_input_value_from_block(caml_globals_map, INT_MAX);
}
CAMLprim value caml_natdynlink_globals_inited(value unit)
{
return Val_int(caml_globals_inited);
}
CAMLprim value caml_natdynlink_open(value filename, value global)
{
CAMLparam2 (filename, global);
CAMLlocal3 (res, handle, header);
void *sym;
void *dlhandle;
char_os *p;
int global_dup;
/* TODO: dlclose in case of error... */
p = caml_stat_strdup_to_os(String_val(filename));
global_dup = Int_val(global);
caml_enter_blocking_section();
dlhandle = caml_dlopen(p, global_dup);
caml_leave_blocking_section();
caml_stat_free(p);
if (NULL == dlhandle)
caml_failwith(caml_dlerror());
sym = caml_dlsym(dlhandle, "caml_plugin_header");
if (NULL == sym)
caml_failwith("not an OCaml plugin");
handle = Val_handle(dlhandle);
header = caml_input_value_from_block(sym, INT_MAX);
res = caml_alloc_tuple(2);
Field(res, 0) = handle;
Field(res, 1) = header;
CAMLreturn(res);
}
CAMLprim value caml_natdynlink_register(value handle_v, value symbols) {
CAMLparam2 (handle_v, symbols);
int nsymbols = Wosize_val(symbols);
void* handle = Handle_val(handle_v);
void** table;
table = caml_stat_alloc(sizeof(void*) * nsymbols);
for (int i = 0; i < nsymbols; i++) {
const char* unit = String_val(Field(symbols, i));
table[i] = getsym(handle, unit, "frametable");
if (table[i] == NULL) {
caml_stat_free(table);
caml_invalid_argument_value(
caml_alloc_sprintf("Dynlink: Missing frametable for %s", unit));
}
}
caml_register_frametables(table, nsymbols);
for (int i = 0; i < nsymbols; i++) {
const char* unit = String_val(Field(symbols, i));
table[i] = getsym(handle, unit, "gc_roots");
if (table[i] == NULL) {
caml_stat_free(table);
caml_invalid_argument_value(
caml_alloc_sprintf("Dynlink: Missing gc_roots for %s", unit));
}
}
caml_register_dyn_globals(table, nsymbols);
for (int i = 0; i < nsymbols; i++) {
const char* unit = String_val(Field(symbols, i));
void* sym = getsym(handle, unit, "code_begin");
void* sym2 = getsym(handle, unit, "code_end");
/* Do not register empty code fragments */
if (NULL != sym && NULL != sym2 && sym != sym2) {
caml_register_code_fragment((char *) sym, (char *) sym2,
DIGEST_LATER, NULL);
}
}
caml_stat_free(table);
CAMLreturn (Val_unit);
}
CAMLprim value caml_natdynlink_run(value handle_v, value symbol) {
CAMLparam2 (handle_v, symbol);
CAMLlocal1 (result);
void* handle = Handle_val(handle_v);
const char *unit;
void (*entrypoint)(void);
unit = String_val(symbol);
if( caml_natdynlink_hook != NULL ) caml_natdynlink_hook(handle,unit);
entrypoint = getsym(handle, unit, "entry");
if (NULL != entrypoint) result = caml_callback((value)(&entrypoint), 0);
else result = Val_unit;
CAMLreturn (result);
}
CAMLprim value caml_natdynlink_run_toplevel(value filename, value symbol)
{
CAMLparam2 (filename, symbol);
CAMLlocal4 (res, v, handle_v, symbols);
void *handle;
char_os *p;
/* TODO: dlclose in case of error... */
p = caml_stat_strdup_to_os(String_val(filename));
caml_enter_blocking_section();
handle = caml_dlopen(p, 1);
caml_leave_blocking_section();
caml_stat_free(p);
if (NULL == handle) {
res = caml_alloc(1,1);
v = caml_copy_string(caml_dlerror());
Store_field(res, 0, v);
} else {
handle_v = Val_handle(handle);
symbols = caml_alloc_small(1, 0);
Field(symbols, 0) = symbol;
(void) caml_natdynlink_register(handle_v, symbols);
res = caml_alloc(1,0);
v = caml_natdynlink_run(handle_v, symbol);
Store_field(res, 0, v);
}
CAMLreturn(res);
}
CAMLprim value caml_natdynlink_loadsym(value symbol)
{
CAMLparam1 (symbol);
CAMLlocal1 (sym);
sym = (value) caml_globalsym(String_val(symbol));
if (!sym) caml_failwith(String_val(symbol));
CAMLreturn(sym);
}
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