Add initial MVP of WASI API support to wasm-interp (#1411)

This is proof of concept that only implements the `proc_exit` and
`fd_write` APIs.

Extending this to the full WASI API will to follow assuming this
approach seems reasonable.

Fixes #1409

1 files changed, 16 insertions, 2 deletions

diff --git a/test/run-tests.py b/test/run-tests.py
index 1b49f4cc..9d01b564 100755
--- a/test/run-tests.py
+++ b/test/run-tests.py
@@ -88,6 +88,11 @@ TOOLS = {
         ('RUN', '%(wasm-interp)s %(temp_file)s.wasm --run-all-exports'),
         ('VERBOSE-ARGS', ['--print-cmd', '-v']),
     ],
+    'run-interp-wasi': [
+        ('RUN', '%(wat2wasm)s %(in_file)s -o %(temp_file)s.wasm'),
+        ('RUN', '%(wasm-interp)s --wasi %(temp_file)s.wasm'),
+        ('VERBOSE-ARGS', ['--print-cmd', '-v']),
+    ],
     'run-interp-spec': [
         ('RUN', '%(wast2json)s %(in_file)s -o %(temp_file)s.json'),
         ('RUN', '%(spectest-interp)s %(temp_file)s.json'),
@@ -673,9 +678,13 @@ class Status(object):
         sys.stderr.write('\r%s\r' % (' ' * self.last_length))
 
 
-def FindTestFiles(ext, filter_pattern_re):
+def FindTestFiles(ext, filter_pattern_re, exclude_dirs):
     tests = []
     for root, dirs, files in os.walk(TEST_DIR):
+        for ex in exclude_dirs:
+            if ex in dirs:
+                # Filtering out dirs here causes os.walk not to descend into them
+                dirs.remove(ex)
         for f in files:
             path = os.path.join(root, f)
             if os.path.splitext(f)[1] == ext:
@@ -908,12 +917,17 @@ def main(args):
             parser.error('--stop-interactive only works with -j1')
 
     if options.patterns:
+        exclude_dirs = []
         pattern_re = '|'.join(
             fnmatch.translate('*%s*' % p) for p in options.patterns)
     else:
         pattern_re = '.*'
+        # By default, exclude wasi tests because WASI support is not include
+        # by int the build by default.
+        # TODO(sbc): Find some way to detect the WASI support.
+        exclude_dirs = ['wasi']
 
-    test_names = FindTestFiles('.txt', pattern_re)
+    test_names = FindTestFiles('.txt', pattern_re, exclude_dirs)
 
     if options.list:
         for test_name in test_names: