gdb/python: add py-jit.expusers/jv/wip/feature-py-jit-api

1 files changed, 56 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.python/py-jit.c b/gdb/testsuite/gdb.python/py-jit.c
new file mode 100644
index 00000000000..1a52f821fd9
--- /dev/null
+++ b/gdb/testsuite/gdb.python/py-jit.c
@@ -0,0 +1,56 @@
+/* Copyright (C) 2022-2022 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   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/>.  */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+
+/* "JIT-ed" function, with the prototype `long (long, long)`.  */
+static const unsigned char jit_function_add_code[] = {
+  0x48, 0x01, 0xfe,		/* add %rdi,%rsi */
+  0x48, 0x89, 0xf0,		/* mov %rsi,%rax */
+  0xc3,				/* retq */
+};
+
+void jit_register_code (char * name, uintptr_t code, size_t size)
+{
+
+}
+
+int
+main (int argc, char **argv)
+{
+  void *code = mmap (NULL, getpagesize (), PROT_WRITE | PROT_EXEC,
+		     MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+  assert (code != MAP_FAILED);
+
+  /* "Compile" jit_function_add.  */
+  memcpy (code, jit_function_add_code,
+	  sizeof (jit_function_add_code));
+
+  jit_register_code("jit_function_add", (uintptr_t)code, sizeof (jit_function_add_code));
+  
+  assert (((long (*)(long, long))code)(1,5) == 6); /* breakpoint 1 line */
+  
+
+  return 0;
+}