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/* 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 "mozilla/TextUtils.h"
#include "mozilla/Utf8.h"
#include <cstring>
#include "js/CharacterEncoding.h"
#include "js/CompilationAndEvaluation.h" // JS::Compile
#include "js/Exception.h"
#include "js/friend/ErrorMessages.h" // JSMSG_*
#include "js/SourceText.h"
#include "jsapi-tests/tests.h"
#include "util/Text.h"
#include "vm/ErrorReporting.h"
using mozilla::IsAsciiHexDigit;
using mozilla::Utf8Unit;
BEGIN_TEST(testEmptyWindow) { return testUtf8() && testUtf16(); }
bool testUtf8() {
// Bad unit with nothing before it.
static const char badLeadingUnit[] = "\x80";
CHECK(testOmittedWindow(badLeadingUnit, JSMSG_BAD_LEADING_UTF8_UNIT, "0x80"));
// Bad unit at start of a fresh line.
static const char badStartingFreshLine[] = "var x = 5;\n\x98";
CHECK(testOmittedWindow(badStartingFreshLine, JSMSG_BAD_LEADING_UTF8_UNIT,
"0x98"));
// Bad trailing unit in initial code point.
static const char badTrailingUnit[] = "\xD8\x20";
CHECK(testOmittedWindow(badTrailingUnit, JSMSG_BAD_TRAILING_UTF8_UNIT,
"0xD8 0x20"));
// Bad trailing unit at start of a fresh line.
static const char badTrailingUnitFreshLine[] = "var x = 5;\n\xD8\x20";
CHECK(testOmittedWindow(badTrailingUnitFreshLine,
JSMSG_BAD_TRAILING_UTF8_UNIT, "0xD8 0x20"));
// Overlong in initial code point.
static const char overlongInitial[] = "\xC0\x80";
CHECK(testOmittedWindow(overlongInitial, JSMSG_FORBIDDEN_UTF8_CODE_POINT,
"0xC0 0x80"));
// Overlong at start of a fresh line.
static const char overlongFreshLine[] = "var x = 5;\n\xC0\x81";
CHECK(testOmittedWindow(overlongFreshLine, JSMSG_FORBIDDEN_UTF8_CODE_POINT,
"0xC0 0x81"));
// Not-enough in initial code point.
static const char notEnoughInitial[] = "\xF0";
CHECK(
testOmittedWindow(notEnoughInitial, JSMSG_NOT_ENOUGH_CODE_UNITS, "0xF0"));
// Not-enough at start of a fresh line.
static const char notEnoughFreshLine[] = "var x = 5;\n\xF0";
CHECK(testOmittedWindow(notEnoughFreshLine, JSMSG_NOT_ENOUGH_CODE_UNITS,
"0xF0"));
return true;
}
bool testUtf16() {
// Bad unit with nothing before it.
static const char16_t badLeadingUnit[] = u"\xDFFF";
CHECK(testOmittedWindow(badLeadingUnit, JSMSG_ILLEGAL_CHARACTER));
// Bad unit at start of a fresh line.
static const char16_t badStartingFreshLine[] = u"var x = 5;\n\xDFFF";
CHECK(testOmittedWindow(badStartingFreshLine, JSMSG_ILLEGAL_CHARACTER));
return true;
}
static bool startsWith(const char* str, const char* prefix) {
return std::strncmp(prefix, str, strlen(prefix)) == 0;
}
static bool equals(const char* str, const char* expected) {
return std::strcmp(str, expected) == 0;
}
JSScript* compile(const char16_t* chars, size_t len) {
JS::SourceText<char16_t> source;
MOZ_RELEASE_ASSERT(
source.init(cx, chars, len, JS::SourceOwnership::Borrowed));
JS::CompileOptions options(cx);
return JS::Compile(cx, options, source);
}
JSScript* compile(const char* chars, size_t len) {
JS::SourceText<Utf8Unit> source;
MOZ_RELEASE_ASSERT(
source.init(cx, chars, len, JS::SourceOwnership::Borrowed));
JS::CompileOptions options(cx);
return JS::Compile(cx, options, source);
}
template <typename CharT, size_t N>
bool testOmittedWindow(const CharT (&chars)[N], unsigned expectedErrorNumber,
const char* badCodeUnits = nullptr) {
JS::Rooted<JSScript*> script(cx, compile(chars, N - 1));
CHECK(!script);
JS::ExceptionStack exnStack(cx);
CHECK(JS::StealPendingExceptionStack(cx, &exnStack));
JS::ErrorReportBuilder report(cx);
CHECK(report.init(cx, exnStack, JS::ErrorReportBuilder::WithSideEffects));
const auto* errorReport = report.report();
CHECK(errorReport->errorNumber == expectedErrorNumber);
if (const auto& notes = errorReport->notes) {
CHECK(sizeof(CharT) == 1);
CHECK(badCodeUnits != nullptr);
auto iter = notes->begin();
CHECK(iter != notes->end());
const char* noteMessage = (*iter)->message().c_str();
// The prefix ought always be the same.
static constexpr char expectedPrefix[] =
"the code units comprising this invalid code point were: ";
constexpr size_t expectedPrefixLen = js_strlen(expectedPrefix);
CHECK(startsWith(noteMessage, expectedPrefix));
// The end of the prefix is the bad code units.
CHECK(equals(noteMessage + expectedPrefixLen, badCodeUnits));
++iter;
CHECK(iter == notes->end());
} else {
CHECK(sizeof(CharT) == 2);
// UTF-16 encoding "errors" are not categorical errors, so the errors
// are just of the invalid-character sort, without an accompanying note
// spelling out a series of invalid code units.
CHECK(!badCodeUnits);
}
CHECK(!errorReport->linebuf());
return true;
}
END_TEST(testEmptyWindow)