1 files changed, 116 insertions, 0 deletions
diff --git a/lldb/utils/test/llvm-mc-shell.py b/lldb/utils/test/llvm-mc-shell.py
new file mode 100755
index 00000000000..6adaf5dd3c5
--- /dev/null
+++ b/lldb/utils/test/llvm-mc-shell.py
@@ -0,0 +1,116 @@
+#!/usr/bin/env python
+
+"""
+Run llvm-mc interactively.
+
+"""
+
+from __future__ import print_function
+
+import os
+import sys
+from optparse import OptionParser
+
+
+def is_exe(fpath):
+    """Check whether fpath is an executable."""
+    return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+
+def which(program):
+    """Find the full path to a program, or return None."""
+    fpath, fname = os.path.split(program)
+    if fpath:
+        if is_exe(program):
+            return program
+    else:
+        for path in os.environ["PATH"].split(os.pathsep):
+            exe_file = os.path.join(path, program)
+            if is_exe(exe_file):
+                return exe_file
+    return None
+
+
+def llvm_mc_loop(mc, mc_options):
+    contents = []
+    fname = 'mc-input.txt'
+    sys.stdout.write(
+        "Enter your input to llvm-mc.  A line starting with 'END' terminates the current batch of input.\n")
+    sys.stdout.write("Enter 'quit' or Ctrl-D to quit the program.\n")
+    while True:
+        sys.stdout.write("> ")
+        next = sys.stdin.readline()
+        # EOF => terminate this llvm-mc shell
+        if not next or next.startswith('quit'):
+            sys.stdout.write('\n')
+            sys.exit(0)
+        # 'END' => send the current batch of input to llvm-mc
+        if next.startswith('END'):
+            # Write contents to our file and clear the contents.
+            with open(fname, 'w') as f:
+                f.writelines(contents)
+                # Clear the list: replace all items with an empty list.
+                contents[:] = []
+
+            # Invoke llvm-mc with our newly created file.
+            mc_cmd = '%s %s %s' % (mc, mc_options, fname)
+            sys.stdout.write("Executing command: %s\n" % mc_cmd)
+            os.system(mc_cmd)
+        else:
+            # Keep accumulating our input.
+            contents.append(next)
+
+
+def main():
+    # This is to set up the Python path to include the pexpect-2.4 dir.
+    # Remember to update this when/if things change.
+    scriptPath = sys.path[0]
+    sys.path.append(
+        os.path.join(
+            scriptPath,
+            os.pardir,
+            os.pardir,
+            'test',
+            'pexpect-2.4'))
+
+    parser = OptionParser(usage="""\
+Do llvm-mc interactively within a shell-like environment.  A batch of input is
+submitted to llvm-mc to execute whenever you terminate the current batch by
+inputing a line which starts with 'END'.  Quit the program by either 'quit' or
+Ctrl-D.
+
+Usage: %prog [options]
+""")
+    parser.add_option('-m', '--llvm-mc',
+                      type='string', action='store',
+                      dest='llvm_mc',
+                      help="""The llvm-mc executable full path, if specified.
+                      Otherwise, it must be present in your PATH environment.""")
+
+    parser.add_option(
+        '-o',
+        '--options',
+        type='string',
+        action='store',
+        dest='llvm_mc_options',
+        help="""The options passed to 'llvm-mc' command if specified.""")
+
+    opts, args = parser.parse_args()
+
+    llvm_mc = opts.llvm_mc if opts.llvm_mc else which('llvm-mc')
+    if not llvm_mc:
+        parser.print_help()
+        sys.exit(1)
+
+    # This is optional.  For example:
+    # --options='-disassemble -triple=arm-apple-darwin -debug-only=arm-disassembler'
+    llvm_mc_options = opts.llvm_mc_options
+
+    # We have parsed the options.
+    print("llvm-mc:", llvm_mc)
+    print("llvm-mc options:", llvm_mc_options)
+
+    llvm_mc_loop(llvm_mc, llvm_mc_options)
+
+if __name__ == '__main__':
+    main()