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Add RegExp recursion depth limit (#2543)

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The regexp engine does not have any recursion depth check, thus it can cause problems with various regexps. Added a new build option `--regexp-recursion-limit N` whose
default value is 0, which is for unlimited recursion depth. Also added a build-option-test.

Fixes #2448
Fixes #2190

JerryScript-DCO-1.0-Signed-off-by: Istvan Miklos imiklos2@inf.u-szeged.hu
This commit is contained in:
Istvan Miklos
2019-01-17 20:16:50 +01:00
committed by Akos Kiss
parent 162e2ddcb6
commit c23cf4176a
7 changed files with 105 additions and 0 deletions
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tools/build.py
+3
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@@ -126,6 +126,8 @@ def get_arguments():
help='specify profile file')
coregrp.add_argument('--regexp-strict-mode', metavar='X', choices=['ON', 'OFF'], type=str.upper,
help=devhelp('enable regexp strict mode (%(choices)s)'))
coregrp.add_argument('--regexp-recursion-limit', metavar='N', type=int,
help='regexp recursion depth limit')
coregrp.add_argument('--show-opcodes', metavar='X', choices=['ON', 'OFF'], type=str.upper,
help=devhelp('enable parser byte-code dumps (%(choices)s)'))
coregrp.add_argument('--show-regexp-opcodes', metavar='X', choices=['ON', 'OFF'], type=str.upper,
@@ -194,6 +196,7 @@ def generate_build_options(arguments):
build_options_append('FEATURE_MEM_STRESS_TEST', arguments.mem_stress_test)
build_options_append('FEATURE_PROFILE', arguments.profile)
build_options_append('FEATURE_REGEXP_STRICT_MODE', arguments.regexp_strict_mode)
build_options_append('REGEXP_RECURSION_LIMIT', arguments.regexp_recursion_limit)
build_options_append('FEATURE_PARSER_DUMP', arguments.show_opcodes)
build_options_append('FEATURE_REGEXP_DUMP', arguments.show_regexp_opcodes)
build_options_append('FEATURE_SNAPSHOT_EXEC', arguments.snapshot_exec)