1 files changed, 129 insertions, 0 deletions
diff --git a/gdb/testsuite/gdb.base/jit-elf-fork-main.c b/gdb/testsuite/gdb.base/jit-elf-fork-main.c
new file mode 100644
index 0000000..7431200
--- /dev/null
+++ b/gdb/testsuite/gdb.base/jit-elf-fork-main.c
@@ -0,0 +1,129 @@
+/* This test program is part of GDB, the GNU debugger.
+
+   Copyright 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Simulate loading of JIT code.  */
+
+#include <elf.h>
+#include <link.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "jit-protocol.h"
+#include "jit-elf-util.h"
+
+static void
+usage (void)
+{
+  fprintf (stderr, "Usage: jit-elf-main libraries...\n");
+  exit (1);
+}
+
+/* Must be defined by .exp file when compiling to know
+   what address to map the ELF binary to.  */
+#ifndef LOAD_ADDRESS
+#error "Must define LOAD_ADDRESS"
+#endif
+#ifndef LOAD_INCREMENT
+#error "Must define LOAD_INCREMENT"
+#endif
+
+int
+main (int argc, char *argv[])
+{
+  int i;
+  alarm (300);
+  /* Used as backing storage for GDB to populate argv.  */
+  char *fake_argv[10];
+
+  if (argc < 2)
+    {
+      usage ();
+      exit (1);
+    }
+
+  for (i = 1; i < argc; ++i)
+    {
+      size_t obj_size;
+      void *load_addr = (void *) (size_t) (LOAD_ADDRESS + (i - 1) * LOAD_INCREMENT);
+      printf ("Loading %s as JIT at %p\n", argv[i], load_addr);
+      void *addr = load_elf (argv[i], &obj_size, load_addr);
+
+      char name[32];
+      sprintf (name, "jit_function_%04d", i);
+      int (*jit_function) (void) = (int (*) (void)) load_symbol (addr, name);
+
+      /* Link entry at the end of the list.  */
+      struct jit_code_entry *const entry = calloc (1, sizeof (*entry));
+      entry->symfile_addr = (const char *)addr;
+      entry->symfile_size = obj_size;
+      entry->prev_entry = __jit_debug_descriptor.relevant_entry;
+      __jit_debug_descriptor.relevant_entry = entry;
+
+      if (entry->prev_entry != NULL)
+	entry->prev_entry->next_entry = entry;
+      else
+	__jit_debug_descriptor.first_entry = entry;
+
+      /* Notify GDB.  */
+      __jit_debug_descriptor.action_flag = JIT_REGISTER;
+      __jit_debug_register_code ();
+
+      if (jit_function () != 42)
+	{
+	  fprintf (stderr, "unexpected return value\n");
+	  exit (1);
+	}
+    }
+
+  i = 0;  /* break before fork */
+
+  fork ();
+
+  i = 0;  /* break after fork */
+
+  /* Now unregister them all in reverse order.  */
+  while (__jit_debug_descriptor.relevant_entry != NULL)
+    {
+      struct jit_code_entry *const entry =
+	__jit_debug_descriptor.relevant_entry;
+      struct jit_code_entry *const prev_entry = entry->prev_entry;
+
+      if (prev_entry != NULL)
+	{
+	  prev_entry->next_entry = NULL;
+	  entry->prev_entry = NULL;
+	}
+      else
+	__jit_debug_descriptor.first_entry = NULL;
+
+      /* Notify GDB.  */
+      __jit_debug_descriptor.action_flag = JIT_UNREGISTER;
+      __jit_debug_register_code ();
+
+      __jit_debug_descriptor.relevant_entry = prev_entry;
+      free (entry);
+    }
+
+  return 0;  /* break before return  */
+}