1 files changed, 357 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testParseJSON.cpp b/js/src/jsapi-tests/testParseJSON.cpp
new file mode 100644
index 0000000000..b4dd74d707
--- /dev/null
+++ b/js/src/jsapi-tests/testParseJSON.cpp
@@ -0,0 +1,357 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ */
+/* 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/. */
+
+#include <limits>
+#include <string.h>
+
+#include "js/Array.h"  // JS::IsArrayObject
+#include "js/Exception.h"
+#include "js/friend/ErrorMessages.h"  // JSMSG_*
+#include "js/JSON.h"
+#include "js/MemoryFunctions.h"
+#include "js/Printf.h"
+#include "js/PropertyAndElement.h"  // JS_GetProperty
+#include "jsapi-tests/tests.h"
+
+using namespace js;
+
+class AutoInflatedString {
+  JSContext* const cx;
+  char16_t* chars_;
+  size_t length_;
+
+ public:
+  explicit AutoInflatedString(JSContext* cx)
+      : cx(cx), chars_(nullptr), length_(0) {}
+  ~AutoInflatedString() { JS_free(cx, chars_); }
+
+  template <size_t N>
+  void operator=(const char (&str)[N]) {
+    length_ = N - 1;
+    chars_ = InflateString(cx, str, length_);
+    if (!chars_) {
+      abort();
+    }
+  }
+
+  void operator=(const char* str) {
+    length_ = strlen(str);
+    chars_ = InflateString(cx, str, length_);
+    if (!chars_) {
+      abort();
+    }
+  }
+
+  const char16_t* chars() const { return chars_; }
+  size_t length() const { return length_; }
+};
+
+BEGIN_TEST(testParseJSON_success) {
+  // Primitives
+  JS::RootedValue expected(cx);
+  expected = JS::TrueValue();
+  CHECK(TryParse(cx, "true", expected));
+
+  expected = JS::FalseValue();
+  CHECK(TryParse(cx, "false", expected));
+
+  expected = JS::NullValue();
+  CHECK(TryParse(cx, "null", expected));
+
+  expected.setInt32(0);
+  CHECK(TryParse(cx, "0", expected));
+
+  expected.setInt32(1);
+  CHECK(TryParse(cx, "1", expected));
+
+  expected.setInt32(-1);
+  CHECK(TryParse(cx, "-1", expected));
+
+  expected.setDouble(1);
+  CHECK(TryParse(cx, "1", expected));
+
+  expected.setDouble(1.75);
+  CHECK(TryParse(cx, "1.75", expected));
+
+  expected.setDouble(9e9);
+  CHECK(TryParse(cx, "9e9", expected));
+
+  expected.setDouble(std::numeric_limits<double>::infinity());
+  CHECK(TryParse(cx, "9e99999", expected));
+
+  JS::Rooted<JSLinearString*> str(cx);
+
+  const char16_t emptystr[] = {'\0'};
+  str = js::NewStringCopyN<CanGC>(cx, emptystr, 0);
+  CHECK(str);
+  expected = JS::StringValue(str);
+  CHECK(TryParse(cx, "\"\"", expected));
+
+  const char16_t nullstr[] = {'\0'};
+  str = NewString(cx, nullstr);
+  CHECK(str);
+  expected = JS::StringValue(str);
+  CHECK(TryParse(cx, "\"\\u0000\"", expected));
+
+  const char16_t backstr[] = {'\b'};
+  str = NewString(cx, backstr);
+  CHECK(str);
+  expected = JS::StringValue(str);
+  CHECK(TryParse(cx, "\"\\b\"", expected));
+  CHECK(TryParse(cx, "\"\\u0008\"", expected));
+
+  const char16_t newlinestr[] = {
+      '\n',
+  };
+  str = NewString(cx, newlinestr);
+  CHECK(str);
+  expected = JS::StringValue(str);
+  CHECK(TryParse(cx, "\"\\n\"", expected));
+  CHECK(TryParse(cx, "\"\\u000A\"", expected));
+
+  // Arrays
+  JS::RootedValue v(cx), v2(cx);
+  JS::RootedObject obj(cx);
+
+  bool isArray;
+
+  CHECK(Parse(cx, "[]", &v));
+  CHECK(v.isObject());
+  obj = &v.toObject();
+  CHECK(JS::IsArrayObject(cx, obj, &isArray));
+  CHECK(isArray);
+  CHECK(JS_GetProperty(cx, obj, "length", &v2));
+  CHECK(v2.isInt32(0));
+
+  CHECK(Parse(cx, "[1]", &v));
+  CHECK(v.isObject());
+  obj = &v.toObject();
+  CHECK(JS::IsArrayObject(cx, obj, &isArray));
+  CHECK(isArray);
+  CHECK(JS_GetProperty(cx, obj, "0", &v2));
+  CHECK(v2.isInt32(1));
+  CHECK(JS_GetProperty(cx, obj, "length", &v2));
+  CHECK(v2.isInt32(1));
+
+  // Objects
+  CHECK(Parse(cx, "{}", &v));
+  CHECK(v.isObject());
+  obj = &v.toObject();
+  CHECK(JS::IsArrayObject(cx, obj, &isArray));
+  CHECK(!isArray);
+
+  CHECK(Parse(cx, "{ \"f\": 17 }", &v));
+  CHECK(v.isObject());
+  obj = &v.toObject();
+  CHECK(JS::IsArrayObject(cx, obj, &isArray));
+  CHECK(!isArray);
+  CHECK(JS_GetProperty(cx, obj, "f", &v2));
+  CHECK(v2.isInt32(17));
+
+  return true;
+}
+
+template <size_t N>
+static JSLinearString* NewString(JSContext* cx, const char16_t (&chars)[N]) {
+  return js::NewStringCopyN<CanGC>(cx, chars, N);
+}
+
+template <size_t N>
+inline bool Parse(JSContext* cx, const char (&input)[N],
+                  JS::MutableHandleValue vp) {
+  AutoInflatedString str(cx);
+  str = input;
+  CHECK(JS_ParseJSON(cx, str.chars(), str.length(), vp));
+  return true;
+}
+
+template <size_t N>
+inline bool TryParse(JSContext* cx, const char (&input)[N],
+                     JS::HandleValue expected) {
+  AutoInflatedString str(cx);
+  RootedValue v(cx);
+  str = input;
+  CHECK(JS_ParseJSON(cx, str.chars(), str.length(), &v));
+  CHECK_SAME(v, expected);
+  return true;
+}
+END_TEST(testParseJSON_success)
+
+BEGIN_TEST(testParseJSON_error) {
+  CHECK(Error(cx, "", 1, 1));
+  CHECK(Error(cx, "\n", 2, 1));
+  CHECK(Error(cx, "\r", 2, 1));
+  CHECK(Error(cx, "\r\n", 2, 1));
+
+  CHECK(Error(cx, "[", 1, 2));
+  CHECK(Error(cx, "[,]", 1, 2));
+  CHECK(Error(cx, "[1,]", 1, 4));
+  CHECK(Error(cx, "{a:2}", 1, 2));
+  CHECK(Error(cx, "{\"a\":2,}", 1, 8));
+  CHECK(Error(cx, "]", 1, 1));
+  CHECK(Error(cx, "\"", 1, 2));
+  CHECK(Error(cx, "{]", 1, 2));
+  CHECK(Error(cx, "[}", 1, 2));
+  CHECK(Error(cx, "'wrongly-quoted string'", 1, 1));
+
+  CHECK(Error(cx, "{\"a\":2 \n b:3}", 2, 2));
+  CHECK(Error(cx, "\n[", 2, 2));
+  CHECK(Error(cx, "\n[,]", 2, 2));
+  CHECK(Error(cx, "\n[1,]", 2, 4));
+  CHECK(Error(cx, "\n{a:2}", 2, 2));
+  CHECK(Error(cx, "\n{\"a\":2,}", 2, 8));
+  CHECK(Error(cx, "\n]", 2, 1));
+  CHECK(Error(cx, "\"bad string\n\"", 1, 12));
+  CHECK(Error(cx, "\r'wrongly-quoted string'", 2, 1));
+  CHECK(Error(cx, "\n\"", 2, 2));
+  CHECK(Error(cx, "\n{]", 2, 2));
+  CHECK(Error(cx, "\n[}", 2, 2));
+  CHECK(Error(cx, "{\"a\":[2,3],\n\"b\":,5,6}", 2, 5));
+
+  CHECK(Error(cx, "{\"a\":2 \r b:3}", 2, 2));
+  CHECK(Error(cx, "\r[", 2, 2));
+  CHECK(Error(cx, "\r[,]", 2, 2));
+  CHECK(Error(cx, "\r[1,]", 2, 4));
+  CHECK(Error(cx, "\r{a:2}", 2, 2));
+  CHECK(Error(cx, "\r{\"a\":2,}", 2, 8));
+  CHECK(Error(cx, "\r]", 2, 1));
+  CHECK(Error(cx, "\"bad string\r\"", 1, 12));
+  CHECK(Error(cx, "\r'wrongly-quoted string'", 2, 1));
+  CHECK(Error(cx, "\r\"", 2, 2));
+  CHECK(Error(cx, "\r{]", 2, 2));
+  CHECK(Error(cx, "\r[}", 2, 2));
+  CHECK(Error(cx, "{\"a\":[2,3],\r\"b\":,5,6}", 2, 5));
+
+  CHECK(Error(cx, "{\"a\":2 \r\n b:3}", 2, 2));
+  CHECK(Error(cx, "\r\n[", 2, 2));
+  CHECK(Error(cx, "\r\n[,]", 2, 2));
+  CHECK(Error(cx, "\r\n[1,]", 2, 4));
+  CHECK(Error(cx, "\r\n{a:2}", 2, 2));
+  CHECK(Error(cx, "\r\n{\"a\":2,}", 2, 8));
+  CHECK(Error(cx, "\r\n]", 2, 1));
+  CHECK(Error(cx, "\"bad string\r\n\"", 1, 12));
+  CHECK(Error(cx, "\r\n'wrongly-quoted string'", 2, 1));
+  CHECK(Error(cx, "\r\n\"", 2, 2));
+  CHECK(Error(cx, "\r\n{]", 2, 2));
+  CHECK(Error(cx, "\r\n[}", 2, 2));
+  CHECK(Error(cx, "{\"a\":[2,3],\r\n\"b\":,5,6}", 2, 5));
+
+  CHECK(Error(cx, "\n\"bad string\n\"", 2, 12));
+  CHECK(Error(cx, "\r\"bad string\r\"", 2, 12));
+  CHECK(Error(cx, "\r\n\"bad string\r\n\"", 2, 12));
+
+  CHECK(Error(cx, "{\n\"a\":[2,3],\r\"b\":,5,6}", 3, 5));
+  CHECK(Error(cx, "{\r\"a\":[2,3],\n\"b\":,5,6}", 3, 5));
+  CHECK(Error(cx, "[\"\\t\\q", 1, 6));
+  CHECK(Error(cx, "[\"\\t\x00", 1, 5));
+  CHECK(Error(cx, "[\"\\t\x01", 1, 5));
+  CHECK(Error(cx, "[\"\\t\\\x00", 1, 6));
+  CHECK(Error(cx, "[\"\\t\\\x01", 1, 6));
+
+  // Unicode escape errors are messy.  The first bad character could be
+  // non-hexadecimal, or it could be absent entirely.  Include tests where
+  // there's a bad character, followed by zero to as many characters as are
+  // needed to form a complete Unicode escape sequence, plus one.  (The extra
+  // characters beyond are valuable because our implementation checks for
+  // too-few subsequent characters first, before checking for subsequent
+  // non-hexadecimal characters.  So \u<END>, \u0<END>, \u00<END>, and
+  // \u000<END> are all *detected* as invalid by the same code path, but the
+  // process of computing the first invalid character follows a different
+  // code path for each.  And \uQQQQ, \u0QQQ, \u00QQ, and \u000Q are detected
+  // as invalid by the same code path [ignoring which precise subexpression
+  // triggers failure of a single condition], but the computation of the
+  // first invalid character follows a different code path for each.)
+  CHECK(Error(cx, "[\"\\t\\u", 1, 7));
+  CHECK(Error(cx, "[\"\\t\\uZ", 1, 7));
+  CHECK(Error(cx, "[\"\\t\\uZZ", 1, 7));
+  CHECK(Error(cx, "[\"\\t\\uZZZ", 1, 7));
+  CHECK(Error(cx, "[\"\\t\\uZZZZ", 1, 7));
+  CHECK(Error(cx, "[\"\\t\\uZZZZZ", 1, 7));
+
+  CHECK(Error(cx, "[\"\\t\\u0", 1, 8));
+  CHECK(Error(cx, "[\"\\t\\u0Z", 1, 8));
+  CHECK(Error(cx, "[\"\\t\\u0ZZ", 1, 8));
+  CHECK(Error(cx, "[\"\\t\\u0ZZZ", 1, 8));
+  CHECK(Error(cx, "[\"\\t\\u0ZZZZ", 1, 8));
+
+  CHECK(Error(cx, "[\"\\t\\u00", 1, 9));
+  CHECK(Error(cx, "[\"\\t\\u00Z", 1, 9));
+  CHECK(Error(cx, "[\"\\t\\u00ZZ", 1, 9));
+  CHECK(Error(cx, "[\"\\t\\u00ZZZ", 1, 9));
+
+  CHECK(Error(cx, "[\"\\t\\u000", 1, 10));
+  CHECK(Error(cx, "[\"\\t\\u000Z", 1, 10));
+  CHECK(Error(cx, "[\"\\t\\u000ZZ", 1, 10));
+
+  return true;
+}
+
+template <size_t N>
+inline bool Error(JSContext* cx, const char (&input)[N], uint32_t expectedLine,
+                  uint32_t expectedColumn) {
+  AutoInflatedString str(cx);
+  RootedValue dummy(cx);
+  str = input;
+
+  bool ok = JS_ParseJSON(cx, str.chars(), str.length(), &dummy);
+  CHECK(!ok);
+
+  JS::ExceptionStack exnStack(cx);
+  CHECK(StealPendingExceptionStack(cx, &exnStack));
+
+  JS::ErrorReportBuilder report(cx);
+  CHECK(report.init(cx, exnStack, JS::ErrorReportBuilder::WithSideEffects));
+  CHECK(report.report()->errorNumber == JSMSG_JSON_BAD_PARSE);
+
+  UniqueChars lineAndColumnASCII =
+      JS_smprintf("line %d column %d", expectedLine, expectedColumn);
+  CHECK(strstr(report.toStringResult().c_str(), lineAndColumnASCII.get()) !=
+        nullptr);
+
+  /* We do not execute JS, so there should be no exception thrown. */
+  CHECK(!JS_IsExceptionPending(cx));
+
+  return true;
+}
+END_TEST(testParseJSON_error)
+
+static bool Censor(JSContext* cx, unsigned argc, JS::Value* vp) {
+  JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
+  MOZ_RELEASE_ASSERT(args.length() == 2);
+  MOZ_RELEASE_ASSERT(args[0].isString());
+  args.rval().setNull();
+  return true;
+}
+
+BEGIN_TEST(testParseJSON_reviver) {
+  JSFunction* fun = JS_NewFunction(cx, Censor, 0, 0, "censor");
+  CHECK(fun);
+
+  JS::RootedValue filter(cx, JS::ObjectValue(*JS_GetFunctionObject(fun)));
+
+  CHECK(TryParse(cx, "true", filter));
+  CHECK(TryParse(cx, "false", filter));
+  CHECK(TryParse(cx, "null", filter));
+  CHECK(TryParse(cx, "1", filter));
+  CHECK(TryParse(cx, "1.75", filter));
+  CHECK(TryParse(cx, "[]", filter));
+  CHECK(TryParse(cx, "[1]", filter));
+  CHECK(TryParse(cx, "{}", filter));
+  return true;
+}
+
+template <size_t N>
+inline bool TryParse(JSContext* cx, const char (&input)[N],
+                     JS::HandleValue filter) {
+  AutoInflatedString str(cx);
+  JS::RootedValue v(cx);
+  str = input;
+  CHECK(JS_ParseJSONWithReviver(cx, str.chars(), str.length(), filter, &v));
+  CHECK(v.isNull());
+  return true;
+}
+END_TEST(testParseJSON_reviver)