New branch binary-annot by Fabrice Le Fessant from r10789

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/binary-annot@10790 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02

1 files changed, 191 insertions, 0 deletions

diff --git a/ocaml-binary-annot/stdlib/header.c b/ocaml-binary-annot/stdlib/header.c
new file mode 100644
index 0000000000..eda76325a6
--- /dev/null
+++ b/ocaml-binary-annot/stdlib/header.c
@@ -0,0 +1,191 @@
+/***********************************************************************/
+/*                                                                     */
+/*                           Objective Caml                            */
+/*                                                                     */
+/*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         */
+/*                                                                     */
+/*  Copyright 1998 Institut National de Recherche en Informatique et   */
+/*  en Automatique.  All rights reserved.  This file is distributed    */
+/*  under the terms of the GNU Library General Public License, with    */
+/*  the special exception on linking described in file ../LICENSE.     */
+/*                                                                     */
+/***********************************************************************/
+
+/* $Id$ */
+
+/* The launcher for bytecode executables (if #! is not working) */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "../config/s.h"
+#ifdef HAS_UNISTD
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "../byterun/mlvalues.h"
+#include "../byterun/exec.h"
+
+char * default_runtime_path = RUNTIME_NAME;
+
+#ifndef MAXPATHLEN
+#define MAXPATHLEN 1024
+#endif
+
+#ifndef S_ISREG
+#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
+#endif
+
+#ifndef SEEK_END
+#define SEEK_END 2
+#endif
+
+#ifndef __CYGWIN32__
+
+/* Normal Unix search path function */
+
+static char * searchpath(char * name)
+{
+  static char fullname[MAXPATHLEN + 1];
+  char * path;
+  char * p;
+  char * q;
+  struct stat st;
+
+  for (p = name; *p != 0; p++) {
+    if (*p == '/') return name;
+  }
+  path = getenv("PATH");
+  if (path == NULL) return name;
+  while(1) {
+    for (p = fullname; *path != 0 && *path != ':'; p++, path++)
+      if (p < fullname + MAXPATHLEN) *p = *path;
+    if (p != fullname && p < fullname + MAXPATHLEN)
+      *p++ = '/';
+    for (q = name; *q != 0; p++, q++)
+      if (p < fullname + MAXPATHLEN) *p = *q;
+    *p = 0;
+    if (stat(fullname, &st) == 0 && S_ISREG(st.st_mode)) break;
+    if (*path == 0) return name;
+    path++;
+  }
+  return fullname;
+}
+
+#else
+
+/* Special version for Cygwin32: takes care of the ".exe" implicit suffix */
+
+static int file_ok(char * name)
+{
+  int fd;
+  /* Cannot use stat() here because it adds ".exe" implicitly */
+  fd = open(name, O_RDONLY);
+  if (fd == -1) return 0;
+  close(fd);
+  return 1;
+}
+
+static char * searchpath(char * name)
+{
+  char * path, * fullname, * p;
+
+  path = getenv("PATH");
+  fullname = malloc(strlen(name) + (path == NULL ? 0 : strlen(path)) + 6);
+  /* 6 = "/" plus ".exe" plus final "\0" */
+  if (fullname == NULL) return name;
+  /* Check for absolute path name */
+  for (p = name; *p != 0; p++) {
+    if (*p == '/' || *p == '\\') {
+      if (file_ok(name)) return name;
+      strcpy(fullname, name);
+      strcat(fullname, ".exe");
+      if (file_ok(fullname)) return fullname;
+      return name;
+    }
+  }
+  /* Search in path */
+  if (path == NULL) return name;
+  while(1) {
+    for (p = fullname; *path != 0 && *path != ':'; p++, path++) *p = *path;
+    if (p != fullname) *p++ = '/';
+    strcpy(p, name);
+    if (file_ok(fullname)) return fullname;
+    strcat(fullname, ".exe");
+    if (file_ok(fullname)) return fullname;
+    if (*path == 0) break;
+    path++;
+  }
+  return name;
+}
+
+#endif
+
+static unsigned long read_size(char * ptr)
+{
+  unsigned char * p = (unsigned char *) ptr;
+  return ((unsigned long) p[0] << 24) + ((unsigned long) p[1] << 16) +
+         ((unsigned long) p[2] << 8) + p[3];
+}
+
+static char * read_runtime_path(int fd)
+{
+  char buffer[TRAILER_SIZE];
+  static char runtime_path[MAXPATHLEN];
+  int num_sections, i;
+  uint32 path_size;
+  long ofs;
+
+  lseek(fd, (long) -TRAILER_SIZE, SEEK_END);
+  if (read(fd, buffer, TRAILER_SIZE) < TRAILER_SIZE) return NULL;
+  num_sections = read_size(buffer);
+  ofs = TRAILER_SIZE + num_sections * 8;
+  lseek(fd, -ofs, SEEK_END);
+  path_size = 0;
+  for (i = 0; i < num_sections; i++) {
+    if (read(fd, buffer, 8) < 8) return NULL;
+    if (buffer[0] == 'R' && buffer[1] == 'N' &&
+        buffer[2] == 'T' && buffer[3] == 'M') {
+      path_size = read_size(buffer + 4);
+      ofs += path_size;
+    } else if (path_size > 0)
+      ofs += read_size(buffer + 4);
+  }
+  if (path_size == 0) return default_runtime_path;
+  if (path_size >= MAXPATHLEN) return NULL;
+  lseek(fd, -ofs, SEEK_END);
+  if (read(fd, runtime_path, path_size) != path_size) return NULL;
+  runtime_path[path_size - 1] = 0;
+  return runtime_path;
+}
+
+static void errwrite(char * msg)
+{
+  write(2, msg, strlen(msg));
+}
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+int main(int argc, char ** argv)
+{
+  char * truename, * runtime_path;
+  int fd;
+
+  truename = searchpath(argv[0]);
+  fd = open(truename, O_RDONLY | O_BINARY);
+  if (fd == -1 || (runtime_path = read_runtime_path(fd)) == NULL) {
+    errwrite(truename);
+    errwrite(" not found or is not a bytecode executable file\n");
+    return 2;
+  }
+  argv[0] = truename;
+  execv(runtime_path, argv);
+  errwrite("Cannot exec ");
+  errwrite(runtime_path);
+  errwrite("\n");
+  return 2;
+}