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-rw-r--r--js/src/gdb/lib-for-tests/catcher.py35
-rw-r--r--js/src/gdb/lib-for-tests/prologue.py129
2 files changed, 164 insertions, 0 deletions
diff --git a/js/src/gdb/lib-for-tests/catcher.py b/js/src/gdb/lib-for-tests/catcher.py
new file mode 100644
index 0000000000..8ef3529255
--- /dev/null
+++ b/js/src/gdb/lib-for-tests/catcher.py
@@ -0,0 +1,35 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Apparently, there's simply no way to ask GDB to exit with a non-zero
+# status when the script run with the --eval-command option fails. Thus, if
+# we have --eval-command run prologue.py directly, syntax errors there will
+# lead GDB to exit with no indication anything went wrong.
+#
+# To avert that, we use this very small launcher script to run prologue.py
+# and catch errors.
+#
+# Remember, errors in this file will cause spurious passes, so keep this as
+# simple as possible!
+# flake8: noqa: F821
+
+import os
+import sys
+import traceback
+
+
+def execfile(filename, globs, locs):
+ with open(filename) as f:
+ code = compile(f.read(), filename, "exec")
+ exec(code, globs, locs)
+
+
+try:
+ # testlibdir is set on the GDB command line, via:
+ # --eval-command python testlibdir=...
+ execfile(os.path.join(testlibdir, "prologue.py"), globals(), locals())
+except Exception as err:
+ sys.stderr.write("Error running GDB prologue:\n")
+ traceback.print_exc()
+ sys.exit(1)
diff --git a/js/src/gdb/lib-for-tests/prologue.py b/js/src/gdb/lib-for-tests/prologue.py
new file mode 100644
index 0000000000..e94ce480d6
--- /dev/null
+++ b/js/src/gdb/lib-for-tests/prologue.py
@@ -0,0 +1,129 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# flake8: noqa: F821
+
+import re
+import sys
+import traceback
+
+import gdb
+
+# testlibdir is set on the GDB command line, via --eval-command python testlibdir=...
+sys.path[0:0] = [testlibdir]
+
+active_fragment = None
+
+# Run the C++ fragment named |fragment|, stopping on entry to |function|
+# ('breakpoint', by default) and then select the calling frame.
+
+
+def run_fragment(fragment, function="gdb-tests.cpp:breakpoint"):
+ # Arrange to stop at a reasonable place in the test program.
+ bp = gdb.Breakpoint(function)
+ try:
+ gdb.execute("run %s" % (fragment,))
+ # Check that we did indeed stop by hitting the breakpoint we set.
+ assert bp.hit_count == 1
+ finally:
+ bp.delete()
+ gdb.execute("frame 1")
+
+ global active_fragment
+ active_fragment = fragment
+
+
+# Assert that |actual| is equal to |expected|; if not, complain in a helpful way.
+
+
+def assert_eq(actual, expected):
+ if actual != expected:
+ raise AssertionError(
+ """Unexpected result:
+expected: %r
+actual: %r"""
+ % (expected, actual)
+ )
+
+
+# Assert that |expected| regex matches |actual| result; if not, complain in a helpful way.
+
+
+def assert_match(actual, expected):
+ if re.match(expected, actual, re.MULTILINE) is None:
+ raise AssertionError(
+ """Unexpected result:
+expected pattern: %r
+actual: %r"""
+ % (expected, actual)
+ )
+
+
+# Assert that |value|'s pretty-printed form is |form|. If |value| is a
+# string, then evaluate it with gdb.parse_and_eval to produce a value.
+
+
+def assert_pretty(value, form):
+ if isinstance(value, str):
+ value = gdb.parse_and_eval(value)
+ assert_eq(str(value), form)
+
+
+# Assert that |value|'s pretty-printed form match the pattern |pattern|. If
+# |value| is a string, then evaluate it with gdb.parse_and_eval to produce a
+# value.
+
+
+def assert_regexp_pretty(value, form):
+ if isinstance(value, str):
+ value = gdb.parse_and_eval(value)
+ assert_match(str(value), form)
+
+
+# Check that the list of registered pretty-printers includes one named
+# |printer|, with a subprinter named |subprinter|.
+
+
+def assert_subprinter_registered(printer, subprinter):
+ # Match a line containing |printer| followed by a colon, and then a
+ # series of more-indented lines containing |subprinter|.
+
+ names = {"printer": re.escape(printer), "subprinter": re.escape(subprinter)}
+ pat = r"^( +)%(printer)s *\n(\1 +.*\n)*\1 +%(subprinter)s *\n" % names
+ output = gdb.execute("info pretty-printer", to_string=True)
+ if not re.search(pat, output, re.MULTILINE):
+ raise AssertionError(
+ "assert_subprinter_registered failed to find pretty-printer:\n"
+ " %s:%s\n"
+ "'info pretty-printer' says:\n"
+ "%s" % (printer, subprinter, output)
+ )
+
+
+# Request full stack traces for Python errors.
+gdb.execute("set python print-stack full")
+
+# Tell GDB not to ask the user about the things we tell it to do.
+gdb.execute("set confirm off", False)
+
+# Some print settings that make testing easier.
+gdb.execute("set print static-members off")
+gdb.execute("set print address off")
+gdb.execute("set print pretty off")
+gdb.execute("set width 0")
+
+try:
+ # testscript is set on the GDB command line, via:
+ # --eval-command python testscript=...
+ execfile(testscript, globals(), locals())
+except AssertionError as err:
+ header = "\nAssertion traceback"
+ if active_fragment:
+ header += " for " + active_fragment
+ sys.stderr.write(header + ":\n")
+ (t, v, tb) = sys.exc_info()
+ traceback.print_tb(tb)
+ sys.stderr.write("\nTest assertion failed:\n")
+ sys.stderr.write(str(err))
+ sys.exit(1)