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qemu/tests/check-qjson.c
Markus Armbruster 16a4859921 json: Improve safety of qobject_from_jsonf_nofail() & friends 
The JSON parser optionally supports interpolation.  This is used to
build QObjects by parsing string templates.  The templates are C
literals, so parse errors (such as invalid interpolation
specifications) are actually programming errors.  Consequently, the
functions providing parsing with interpolation
(qobject_from_jsonf_nofail(), qobject_from_vjsonf_nofail(),
qdict_from_jsonf_nofail(), qdict_from_vjsonf_nofail()) pass
&error_abort to the parser.

However, there's another, more dangerous kind of programming error:
since we use va_arg() to get the value to interpolate, behavior is
undefined when the variable argument isn't consistent with the
interpolation specification.

The same problem exists with printf()-like functions, and the solution
is to have the compiler check consistency.  This is what
GCC_FMT_ATTR() is about.

To enable this type checking for interpolation as well, we carefully
chose our interpolation specifications to match printf conversion
specifications, and decorate functions parsing templates with
GCC_FMT_ATTR().

Note that this only protects against undefined behavior due to type
errors.  It can't protect against use of invalid interpolation
specifications that happen to be valid printf conversion
specifications.

However, there's still a gaping hole in the type checking: GCC
recognizes '%' as start of printf conversion specification anywhere in
the template, but the parser recognizes it only outside JSON strings.
For instance, if someone were to pass a "{ '%s': %d }" template, GCC
would require a char * and an int argument, but the parser would
va_arg() only an int argument, resulting in undefined behavior.

Avoid undefined behavior by catching the programming error at run
time: have the parser recognize and reject '%' in JSON strings.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180823164025.12553-57-armbru@redhat.com>
2018-08-24 20:26:37 +02:00

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/*
* Copyright IBM, Corp. 2009
* Copyright (c) 2013, 2015 Red Hat Inc.
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
* Markus Armbruster <armbru@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qapi/qmp/qbool.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qmp/qlit.h"
#include "qapi/qmp/qnull.h"
#include "qapi/qmp/qnum.h"
#include "qapi/qmp/qstring.h"
#include "qemu/unicode.h"
#include "qemu-common.h"
static QString *from_json_str(const char *jstr, bool single, Error **errp)
{
char quote = single ? '\'' : '"';
char *qjstr = g_strdup_printf("%c%s%c", quote, jstr, quote);
QString *ret = qobject_to(QString, qobject_from_json(qjstr, errp));
g_free(qjstr);
return ret;
}
static char *to_json_str(QString *str)
{
QString *json = qobject_to_json(QOBJECT(str));
char *jstr;
if (!json) {
return NULL;
}
/* peel off double quotes */
jstr = g_strndup(qstring_get_str(json) + 1,
qstring_get_length(json) - 2);
qobject_unref(json);
return jstr;
}
static void escaped_string(void)
{
struct {
/* Content of JSON string to parse with qobject_from_json() */
const char *json_in;
/* Expected parse output; to unparse with qobject_to_json() */
const char *utf8_out;
int skip;
} test_cases[] = {
{ "\\b\\f\\n\\r\\t\\\\\\\"", "\b\f\n\r\t\\\"" },
{ "\\/\\'", "/'", .skip = 1 },
{ "single byte utf-8 \\u0020", "single byte utf-8 ", .skip = 1 },
{ "double byte utf-8 \\u00A2", "double byte utf-8 \xc2\xa2" },
{ "triple byte utf-8 \\u20AC", "triple byte utf-8 \xe2\x82\xac" },
{ "quadruple byte utf-8 \\uD834\\uDD1E", /* U+1D11E */
"quadruple byte utf-8 \xF0\x9D\x84\x9E" },
{ "\\", NULL },
{ "\\z", NULL },
{ "\\ux", NULL },
{ "\\u1x", NULL },
{ "\\u12x", NULL },
{ "\\u123x", NULL },
{ "\\u12345", "\341\210\2645" },
{ "\\u0000x", "\xC0\x80x" },
{ "unpaired leading surrogate \\uD800", NULL },
{ "unpaired leading surrogate \\uD800\\uCAFE", NULL },
{ "unpaired leading surrogate \\uD800\\uD801\\uDC02", NULL },
{ "unpaired trailing surrogate \\uDC00", NULL },
{ "backward surrogate pair \\uDC00\\uD800", NULL },
{ "noncharacter U+FDD0 \\uFDD0", NULL },
{ "noncharacter U+FDEF \\uFDEF", NULL },
{ "noncharacter U+1FFFE \\uD87F\\uDFFE", NULL },
{ "noncharacter U+10FFFF \\uDC3F\\uDFFF", NULL },
{}
};
int i, j;
QString *cstr;
char *jstr;
for (i = 0; test_cases[i].json_in; i++) {
for (j = 0; j < 2; j++) {
if (test_cases[i].utf8_out) {
cstr = from_json_str(test_cases[i].json_in, j, &error_abort);
g_assert_cmpstr(qstring_get_try_str(cstr),
==, test_cases[i].utf8_out);
if (!test_cases[i].skip) {
jstr = to_json_str(cstr);
g_assert_cmpstr(jstr, ==, test_cases[i].json_in);
g_free(jstr);
}
qobject_unref(cstr);
} else {
cstr = from_json_str(test_cases[i].json_in, j, NULL);
g_assert(!cstr);
}
}
}
}
static void string_with_quotes(void)
{
const char *test_cases[] = {
"\"the bee's knees\"",
"'double quote \"'",
NULL
};
int i;
QString *str;
char *cstr;
for (i = 0; test_cases[i]; i++) {
str = qobject_to(QString,
qobject_from_json(test_cases[i], &error_abort));
g_assert(str);
cstr = g_strndup(test_cases[i] + 1, strlen(test_cases[i]) - 2);
g_assert_cmpstr(qstring_get_str(str), ==, cstr);
g_free(cstr);
qobject_unref(str);
}
}
static void utf8_string(void)
{
/*
* Most test cases are scraped from Markus Kuhn's UTF-8 decoder
* capability and stress test at
* http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt
*/
static const struct {
/* Content of JSON string to parse with qobject_from_json() */
const char *json_in;
/* Expected parse output */
const char *utf8_out;
/* Expected unparse output, defaults to @json_in */
const char *json_out;
} test_cases[] = {
/* 0 Control characters */
{
/*
* Note: \x00 is impossible, other representations of
* U+0000 are covered under 4.3
*/
"\x01\x02\x03\x04\x05\x06\x07"
"\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F"
"\x10\x11\x12\x13\x14\x15\x16\x17"
"\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F",
NULL,
"\\u0001\\u0002\\u0003\\u0004\\u0005\\u0006\\u0007"
"\\b\\t\\n\\u000B\\f\\r\\u000E\\u000F"
"\\u0010\\u0011\\u0012\\u0013\\u0014\\u0015\\u0016\\u0017"
"\\u0018\\u0019\\u001A\\u001B\\u001C\\u001D\\u001E\\u001F",
},
/* 1 Some correct UTF-8 text */
{
/* a bit of German */
"Falsches \xC3\x9C" "ben von Xylophonmusik qu\xC3\xA4lt"
" jeden gr\xC3\xB6\xC3\x9F" "eren Zwerg.",
"Falsches \xC3\x9C" "ben von Xylophonmusik qu\xC3\xA4lt"
" jeden gr\xC3\xB6\xC3\x9F" "eren Zwerg.",
"Falsches \\u00DCben von Xylophonmusik qu\\u00E4lt"
" jeden gr\\u00F6\\u00DFeren Zwerg.",
},
{
/* a bit of Greek */
"\xCE\xBA\xE1\xBD\xB9\xCF\x83\xCE\xBC\xCE\xB5",
"\xCE\xBA\xE1\xBD\xB9\xCF\x83\xCE\xBC\xCE\xB5",
"\\u03BA\\u1F79\\u03C3\\u03BC\\u03B5",
},
/* 2 Boundary condition test cases */
/* 2.1 First possible sequence of a certain length */
/*
* 2.1.1 1 byte U+0020
* Control characters are already covered by their own test
* case under 0. Test the first 1 byte non-control character
* here.
*/
{
" ",
" ",
},
/* 2.1.2 2 bytes U+0080 */
{
"\xC2\x80",
"\xC2\x80",
"\\u0080",
},
/* 2.1.3 3 bytes U+0800 */
{
"\xE0\xA0\x80",
"\xE0\xA0\x80",
"\\u0800",
},
/* 2.1.4 4 bytes U+10000 */
{
"\xF0\x90\x80\x80",
"\xF0\x90\x80\x80",
"\\uD800\\uDC00",
},
/* 2.1.5 5 bytes U+200000 */
{
"\xF8\x88\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 2.1.6 6 bytes U+4000000 */
{
"\xFC\x84\x80\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 2.2 Last possible sequence of a certain length */
/* 2.2.1 1 byte U+007F */
{
"\x7F",
"\x7F",
"\\u007F",
},
/* 2.2.2 2 bytes U+07FF */
{
"\xDF\xBF",
"\xDF\xBF",
"\\u07FF",
},
/*
* 2.2.3 3 bytes U+FFFC
* The last possible sequence is actually U+FFFF. But that's
* a noncharacter, and already covered by its own test case
* under 5.3. Same for U+FFFE. U+FFFD is the last character
* in the BMP, and covered under 2.3. Because of U+FFFD's
* special role as replacement character, it's worth testing
* U+FFFC here.
*/
{
"\xEF\xBF\xBC",
"\xEF\xBF\xBC",
"\\uFFFC",
},
/* 2.2.4 4 bytes U+1FFFFF */
{
"\xF7\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 2.2.5 5 bytes U+3FFFFFF */
{
"\xFB\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 2.2.6 6 bytes U+7FFFFFFF */
{
"\xFD\xBF\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 2.3 Other boundary conditions */
{
/* last one before surrogate range: U+D7FF */
"\xED\x9F\xBF",
"\xED\x9F\xBF",
"\\uD7FF",
},
{
/* first one after surrogate range: U+E000 */
"\xEE\x80\x80",
"\xEE\x80\x80",
"\\uE000",
},
{
/* last one in BMP: U+FFFD */
"\xEF\xBF\xBD",
"\xEF\xBF\xBD",
"\\uFFFD",
},
{
/* last one in last plane: U+10FFFD */
"\xF4\x8F\xBF\xBD",
"\xF4\x8F\xBF\xBD",
"\\uDBFF\\uDFFD"
},
{
/* first one beyond Unicode range: U+110000 */
"\xF4\x90\x80\x80",
NULL,
"\\uFFFD",
},
/* 3 Malformed sequences */
/* 3.1 Unexpected continuation bytes */
/* 3.1.1 First continuation byte */
{
"\x80",
NULL,
"\\uFFFD",
},
/* 3.1.2 Last continuation byte */
{
"\xBF",
NULL,
"\\uFFFD",
},
/* 3.1.3 2 continuation bytes */
{
"\x80\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
/* 3.1.4 3 continuation bytes */
{
"\x80\xBF\x80",
NULL,
"\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.5 4 continuation bytes */
{
"\x80\xBF\x80\xBF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.6 5 continuation bytes */
{
"\x80\xBF\x80\xBF\x80",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.7 6 continuation bytes */
{
"\x80\xBF\x80\xBF\x80\xBF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.8 7 continuation bytes */
{
"\x80\xBF\x80\xBF\x80\xBF\x80",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.9 Sequence of all 64 possible continuation bytes */
{
"\x80\x81\x82\x83\x84\x85\x86\x87"
"\x88\x89\x8A\x8B\x8C\x8D\x8E\x8F"
"\x90\x91\x92\x93\x94\x95\x96\x97"
"\x98\x99\x9A\x9B\x9C\x9D\x9E\x9F"
"\xA0\xA1\xA2\xA3\xA4\xA5\xA6\xA7"
"\xA8\xA9\xAA\xAB\xAC\xAD\xAE\xAF"
"\xB0\xB1\xB2\xB3\xB4\xB5\xB6\xB7"
"\xB8\xB9\xBA\xBB\xBC\xBD\xBE\xBF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.2 Lonely start characters */
/* 3.2.1 All 32 first bytes of 2-byte sequences, followed by space */
{
"\xC0 \xC1 \xC2 \xC3 \xC4 \xC5 \xC6 \xC7 "
"\xC8 \xC9 \xCA \xCB \xCC \xCD \xCE \xCF "
"\xD0 \xD1 \xD2 \xD3 \xD4 \xD5 \xD6 \xD7 "
"\xD8 \xD9 \xDA \xDB \xDC \xDD \xDE \xDF ",
NULL,
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD "
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD "
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD "
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD ",
},
/* 3.2.2 All 16 first bytes of 3-byte sequences, followed by space */
{
"\xE0 \xE1 \xE2 \xE3 \xE4 \xE5 \xE6 \xE7 "
"\xE8 \xE9 \xEA \xEB \xEC \xED \xEE \xEF ",
NULL,
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD "
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD ",
},
/* 3.2.3 All 8 first bytes of 4-byte sequences, followed by space */
{
"\xF0 \xF1 \xF2 \xF3 \xF4 \xF5 \xF6 \xF7 ",
NULL,
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD ",
},
/* 3.2.4 All 4 first bytes of 5-byte sequences, followed by space */
{
"\xF8 \xF9 \xFA \xFB ",
NULL,
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD ",
},
/* 3.2.5 All 2 first bytes of 6-byte sequences, followed by space */
{
"\xFC \xFD ",
NULL,
"\\uFFFD \\uFFFD ",
},
/* 3.3 Sequences with last continuation byte missing */
/* 3.3.1 2-byte sequence with last byte missing (U+0000) */
{
"\xC0",
NULL,
"\\uFFFD",
},
/* 3.3.2 3-byte sequence with last byte missing (U+0000) */
{
"\xE0\x80",
NULL,
"\\uFFFD",
},
/* 3.3.3 4-byte sequence with last byte missing (U+0000) */
{
"\xF0\x80\x80",
NULL,
"\\uFFFD",
},
/* 3.3.4 5-byte sequence with last byte missing (U+0000) */
{
"\xF8\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 3.3.5 6-byte sequence with last byte missing (U+0000) */
{
"\xFC\x80\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 3.3.6 2-byte sequence with last byte missing (U+07FF) */
{
"\xDF",
NULL,
"\\uFFFD",
},
/* 3.3.7 3-byte sequence with last byte missing (U+FFFF) */
{
"\xEF\xBF",
NULL,
"\\uFFFD",
},
/* 3.3.8 4-byte sequence with last byte missing (U+1FFFFF) */
{
"\xF7\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 3.3.9 5-byte sequence with last byte missing (U+3FFFFFF) */
{
"\xFB\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 3.3.10 6-byte sequence with last byte missing (U+7FFFFFFF) */
{
"\xFD\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 3.4 Concatenation of incomplete sequences */
{
"\xC0\xE0\x80\xF0\x80\x80\xF8\x80\x80\x80\xFC\x80\x80\x80\x80"
"\xDF\xEF\xBF\xF7\xBF\xBF\xFB\xBF\xBF\xBF\xFD\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.5 Impossible bytes */
{
"\xFE",
NULL,
"\\uFFFD",
},
{
"\xFF",
NULL,
"\\uFFFD",
},
{
"\xFE\xFE\xFF\xFF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 4 Overlong sequences */
/* 4.1 Overlong '/' */
{
"\xC0\xAF",
NULL,
"\\uFFFD",
},
{
"\xE0\x80\xAF",
NULL,
"\\uFFFD",
},
{
"\xF0\x80\x80\xAF",
NULL,
"\\uFFFD",
},
{
"\xF8\x80\x80\x80\xAF",
NULL,
"\\uFFFD",
},
{
"\xFC\x80\x80\x80\x80\xAF",
NULL,
"\\uFFFD",
},
/*
* 4.2 Maximum overlong sequences
* Highest Unicode value that is still resulting in an
* overlong sequence if represented with the given number of
* bytes. This is a boundary test for safe UTF-8 decoders.
*/
{
/* \U+007F */
"\xC1\xBF",
NULL,
"\\uFFFD",
},
{
/* \U+07FF */
"\xE0\x9F\xBF",
NULL,
"\\uFFFD",
},
{
/*
* \U+FFFC
* The actual maximum would be U+FFFF, but that's a
* noncharacter. Testing U+FFFC seems more useful. See
* also 2.2.3
*/
"\xF0\x8F\xBF\xBC",
NULL,
"\\uFFFD",
},
{
/* \U+1FFFFF */
"\xF8\x87\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
{
/* \U+3FFFFFF */
"\xFC\x83\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 4.3 Overlong representation of the NUL character */
{
/* \U+0000 */
"\xC0\x80",
"\xC0\x80",
"\\u0000",
},
{
/* \U+0000 */
"\xE0\x80\x80",
NULL,
"\\uFFFD",
},
{
/* \U+0000 */
"\xF0\x80\x80\x80",
NULL,
"\\uFFFD",
},
{
/* \U+0000 */
"\xF8\x80\x80\x80\x80",
NULL,
"\\uFFFD",
},
{
/* \U+0000 */
"\xFC\x80\x80\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 5 Illegal code positions */
/* 5.1 Single UTF-16 surrogates */
{
/* \U+D800 */
"\xED\xA0\x80",
NULL,
"\\uFFFD",
},
{
/* \U+DB7F */
"\xED\xAD\xBF",
NULL,
"\\uFFFD",
},
{
/* \U+DB80 */
"\xED\xAE\x80",
NULL,
"\\uFFFD",
},
{
/* \U+DBFF */
"\xED\xAF\xBF",
NULL,
"\\uFFFD",
},
{
/* \U+DC00 */
"\xED\xB0\x80",
NULL,
"\\uFFFD",
},
{
/* \U+DF80 */
"\xED\xBE\x80",
NULL,
"\\uFFFD",
},
{
/* \U+DFFF */
"\xED\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 5.2 Paired UTF-16 surrogates */
{
/* \U+D800\U+DC00 */
"\xED\xA0\x80\xED\xB0\x80",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+D800\U+DFFF */
"\xED\xA0\x80\xED\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DB7F\U+DC00 */
"\xED\xAD\xBF\xED\xB0\x80",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DB7F\U+DFFF */
"\xED\xAD\xBF\xED\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DB80\U+DC00 */
"\xED\xAE\x80\xED\xB0\x80",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DB80\U+DFFF */
"\xED\xAE\x80\xED\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DBFF\U+DC00 */
"\xED\xAF\xBF\xED\xB0\x80",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DBFF\U+DFFF */
"\xED\xAF\xBF\xED\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
/* 5.3 Other illegal code positions */
/* BMP noncharacters */
{
/* \U+FFFE */
"\xEF\xBF\xBE",
NULL,
"\\uFFFD",
},
{
/* \U+FFFF */
"\xEF\xBF\xBF",
NULL,
"\\uFFFD",
},
{
/* U+FDD0 */
"\xEF\xB7\x90",
NULL,
"\\uFFFD",
},
{
/* U+FDEF */
"\xEF\xB7\xAF",
NULL,
"\\uFFFD",
},
/* Plane 1 .. 16 noncharacters */
{
/* U+1FFFE U+1FFFF U+2FFFE U+2FFFF ... U+10FFFE U+10FFFF */
"\xF0\x9F\xBF\xBE\xF0\x9F\xBF\xBF"
"\xF0\xAF\xBF\xBE\xF0\xAF\xBF\xBF"
"\xF0\xBF\xBF\xBE\xF0\xBF\xBF\xBF"
"\xF1\x8F\xBF\xBE\xF1\x8F\xBF\xBF"
"\xF1\x9F\xBF\xBE\xF1\x9F\xBF\xBF"
"\xF1\xAF\xBF\xBE\xF1\xAF\xBF\xBF"
"\xF1\xBF\xBF\xBE\xF1\xBF\xBF\xBF"
"\xF2\x8F\xBF\xBE\xF2\x8F\xBF\xBF"
"\xF2\x9F\xBF\xBE\xF2\x9F\xBF\xBF"
"\xF2\xAF\xBF\xBE\xF2\xAF\xBF\xBF"
"\xF2\xBF\xBF\xBE\xF2\xBF\xBF\xBF"
"\xF3\x8F\xBF\xBE\xF3\x8F\xBF\xBF"
"\xF3\x9F\xBF\xBE\xF3\x9F\xBF\xBF"
"\xF3\xAF\xBF\xBE\xF3\xAF\xBF\xBF"
"\xF3\xBF\xBF\xBE\xF3\xBF\xBF\xBF"
"\xF4\x8F\xBF\xBE\xF4\x8F\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
{}
};
int i, j;
QString *str;
const char *json_in, *utf8_out, *utf8_in, *json_out, *tail;
char *end, *in, *jstr;
for (i = 0; test_cases[i].json_in; i++) {
for (j = 0; j < 2; j++) {
json_in = test_cases[i].json_in;
utf8_out = test_cases[i].utf8_out;
utf8_in = test_cases[i].utf8_out ?: test_cases[i].json_in;
json_out = test_cases[i].json_out ?: test_cases[i].json_in;
/* Parse @json_in, expect @utf8_out */
if (utf8_out) {
str = from_json_str(json_in, j, &error_abort);
g_assert_cmpstr(qstring_get_try_str(str), ==, utf8_out);
qobject_unref(str);
} else {
str = from_json_str(json_in, j, NULL);
g_assert(!str);
/*
* Failure may be due to any sequence, but *all* sequences
* are expected to fail. Test each one in isolation.
*/
for (tail = json_in; *tail; tail = end) {
mod_utf8_codepoint(tail, 6, &end);
if (*end == ' ') {
end++;
}
in = strndup(tail, end - tail);
str = from_json_str(in, j, NULL);
g_assert(!str);
g_free(in);
}
}
/* Unparse @utf8_in, expect @json_out */
str = qstring_from_str(utf8_in);
jstr = to_json_str(str);
g_assert_cmpstr(jstr, ==, json_out);
qobject_unref(str);
g_free(jstr);
/* Parse @json_out right back, unless it has replacements */
if (!strstr(json_out, "\\uFFFD")) {
str = from_json_str(json_out, j, &error_abort);
g_assert_cmpstr(qstring_get_try_str(str), ==, utf8_in);
}
}
}
}
static void simple_number(void)
{
int i;
struct {
const char *encoded;
int64_t decoded;
int skip;
} test_cases[] = {
{ "0", 0 },
{ "1234", 1234 },
{ "1", 1 },
{ "-32", -32 },
{ "-0", 0, .skip = 1 },
{ },
};
for (i = 0; test_cases[i].encoded; i++) {
QNum *qnum;
int64_t val;
qnum = qobject_to(QNum,
qobject_from_json(test_cases[i].encoded,
&error_abort));
g_assert(qnum);
g_assert(qnum_get_try_int(qnum, &val));
g_assert_cmpint(val, ==, test_cases[i].decoded);
if (test_cases[i].skip == 0) {
QString *str;
str = qobject_to_json(QOBJECT(qnum));
g_assert(strcmp(qstring_get_str(str), test_cases[i].encoded) == 0);
qobject_unref(str);
}
qobject_unref(qnum);
}
}
static void large_number(void)
{
const char *maxu64 = "18446744073709551615"; /* 2^64-1 */
const char *gtu64 = "18446744073709551616"; /* 2^64 */
const char *lti64 = "-9223372036854775809"; /* -2^63 - 1 */
QNum *qnum;
QString *str;
uint64_t val;
int64_t ival;
qnum = qobject_to(QNum, qobject_from_json(maxu64, &error_abort));
g_assert(qnum);
g_assert_cmpuint(qnum_get_uint(qnum), ==, 18446744073709551615U);
g_assert(!qnum_get_try_int(qnum, &ival));
str = qobject_to_json(QOBJECT(qnum));
g_assert_cmpstr(qstring_get_str(str), ==, maxu64);
qobject_unref(str);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_json(gtu64, &error_abort));
g_assert(qnum);
g_assert_cmpfloat(qnum_get_double(qnum), ==, 18446744073709552e3);
g_assert(!qnum_get_try_uint(qnum, &val));
g_assert(!qnum_get_try_int(qnum, &ival));
str = qobject_to_json(QOBJECT(qnum));
g_assert_cmpstr(qstring_get_str(str), ==, gtu64);
qobject_unref(str);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_json(lti64, &error_abort));
g_assert(qnum);
g_assert_cmpfloat(qnum_get_double(qnum), ==, -92233720368547758e2);
g_assert(!qnum_get_try_uint(qnum, &val));
g_assert(!qnum_get_try_int(qnum, &ival));
str = qobject_to_json(QOBJECT(qnum));
g_assert_cmpstr(qstring_get_str(str), ==, "-9223372036854775808");
qobject_unref(str);
qobject_unref(qnum);
}
static void float_number(void)
{
int i;
struct {
const char *encoded;
double decoded;
int skip;
} test_cases[] = {
{ "32.43", 32.43 },
{ "0.222", 0.222 },
{ "-32.12313", -32.12313 },
{ "-32.20e-10", -32.20e-10, .skip = 1 },
{ },
};
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QNum *qnum;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
qnum = qobject_to(QNum, obj);
g_assert(qnum);
g_assert(qnum_get_double(qnum) == test_cases[i].decoded);
if (test_cases[i].skip == 0) {
QString *str;
str = qobject_to_json(obj);
g_assert(strcmp(qstring_get_str(str), test_cases[i].encoded) == 0);
qobject_unref(str);
}
qobject_unref(qnum);
}
}
static void keyword_literal(void)
{
QObject *obj;
QBool *qbool;
QNull *null;
QString *str;
obj = qobject_from_json("true", &error_abort);
qbool = qobject_to(QBool, obj);
g_assert(qbool);
g_assert(qbool_get_bool(qbool) == true);
str = qobject_to_json(obj);
g_assert(strcmp(qstring_get_str(str), "true") == 0);
qobject_unref(str);
qobject_unref(qbool);
obj = qobject_from_json("false", &error_abort);
qbool = qobject_to(QBool, obj);
g_assert(qbool);
g_assert(qbool_get_bool(qbool) == false);
str = qobject_to_json(obj);
g_assert(strcmp(qstring_get_str(str), "false") == 0);
qobject_unref(str);
qobject_unref(qbool);
obj = qobject_from_json("null", &error_abort);
g_assert(obj != NULL);
g_assert(qobject_type(obj) == QTYPE_QNULL);
null = qnull();
g_assert(QOBJECT(null) == obj);
qobject_unref(obj);
qobject_unref(null);
}
static void interpolation_valid(void)
{
long long value_lld = 0x123456789abcdefLL;
int64_t value_d64 = value_lld;
long value_ld = (long)value_lld;
int value_d = (int)value_lld;
unsigned long long value_llu = 0xfedcba9876543210ULL;
uint64_t value_u64 = value_llu;
unsigned long value_lu = (unsigned long)value_llu;
unsigned value_u = (unsigned)value_llu;
double value_f = 2.323423423;
const char *value_s = "hello world";
QObject *value_p = QOBJECT(qnull());
QBool *qbool;
QNum *qnum;
QString *qstr;
QObject *qobj;
/* bool */
qbool = qobject_to(QBool, qobject_from_jsonf_nofail("%i", false));
g_assert(qbool);
g_assert(qbool_get_bool(qbool) == false);
qobject_unref(qbool);
/* Test that non-zero values other than 1 get collapsed to true */
qbool = qobject_to(QBool, qobject_from_jsonf_nofail("%i", 2));
g_assert(qbool);
g_assert(qbool_get_bool(qbool) == true);
qobject_unref(qbool);
/* number */
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%d", value_d));
g_assert_cmpint(qnum_get_int(qnum), ==, value_d);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%ld", value_ld));
g_assert_cmpint(qnum_get_int(qnum), ==, value_ld);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%lld", value_lld));
g_assert_cmpint(qnum_get_int(qnum), ==, value_lld);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%" PRId64, value_d64));
g_assert_cmpint(qnum_get_int(qnum), ==, value_lld);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%u", value_u));
g_assert_cmpuint(qnum_get_uint(qnum), ==, value_u);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%lu", value_lu));
g_assert_cmpuint(qnum_get_uint(qnum), ==, value_lu);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%llu", value_llu));
g_assert_cmpuint(qnum_get_uint(qnum), ==, value_llu);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%" PRIu64, value_u64));
g_assert_cmpuint(qnum_get_uint(qnum), ==, value_llu);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%f", value_f));
g_assert(qnum_get_double(qnum) == value_f);
qobject_unref(qnum);
/* string */
qstr = qobject_to(QString,
qobject_from_jsonf_nofail("%s", value_s));
g_assert_cmpstr(qstring_get_try_str(qstr), ==, value_s);
qobject_unref(qstr);
/* object */
qobj = qobject_from_jsonf_nofail("%p", value_p);
g_assert(qobj == value_p);
}
static void interpolation_unknown(void)
{
if (g_test_subprocess()) {
qobject_from_jsonf_nofail("%x", 666);
}
g_test_trap_subprocess(NULL, 0, 0);
g_test_trap_assert_failed();
g_test_trap_assert_stderr("*Unexpected error*"
"invalid interpolation '%x'*");
}
static void interpolation_string(void)
{
if (g_test_subprocess()) {
qobject_from_jsonf_nofail("['%s', %s]", "eins", "zwei");
}
g_test_trap_subprocess(NULL, 0, 0);
g_test_trap_assert_failed();
g_test_trap_assert_stderr("*Unexpected error*"
"can't interpolate into string*");
}
static void simple_dict(void)
{
int i;
struct {
const char *encoded;
QLitObject decoded;
} test_cases[] = {
{
.encoded = "{\"foo\": 42, \"bar\": \"hello world\"}",
.decoded = QLIT_QDICT(((QLitDictEntry[]){
{ "foo", QLIT_QNUM(42) },
{ "bar", QLIT_QSTR("hello world") },
{ }
})),
}, {
.encoded = "{}",
.decoded = QLIT_QDICT(((QLitDictEntry[]){
{ }
})),
}, {
.encoded = "{\"foo\": 43}",
.decoded = QLIT_QDICT(((QLitDictEntry[]){
{ "foo", QLIT_QNUM(43) },
{ }
})),
},
{ }
};
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QString *str;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
str = qobject_to_json(obj);
qobject_unref(obj);
obj = qobject_from_json(qstring_get_str(str), &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
qobject_unref(obj);
qobject_unref(str);
}
}
/*
* this generates json of the form:
* a(0,m) = [0, 1, ..., m-1]
* a(n,m) = {
* 'key0': a(0,m),
* 'key1': a(1,m),
* ...
* 'key(n-1)': a(n-1,m)
* }
*/
static void gen_test_json(GString *gstr, int nest_level_max,
int elem_count)
{
int i;
g_assert(gstr);
if (nest_level_max == 0) {
g_string_append(gstr, "[");
for (i = 0; i < elem_count; i++) {
g_string_append_printf(gstr, "%d", i);
if (i < elem_count - 1) {
g_string_append_printf(gstr, ", ");
}
}
g_string_append(gstr, "]");
return;
}
g_string_append(gstr, "{");
for (i = 0; i < nest_level_max; i++) {
g_string_append_printf(gstr, "'key%d': ", i);
gen_test_json(gstr, i, elem_count);
if (i < nest_level_max - 1) {
g_string_append(gstr, ",");
}
}
g_string_append(gstr, "}");
}
static void large_dict(void)
{
GString *gstr = g_string_new("");
QObject *obj;
gen_test_json(gstr, 10, 100);
obj = qobject_from_json(gstr->str, &error_abort);
g_assert(obj != NULL);
qobject_unref(obj);
g_string_free(gstr, true);
}
static void simple_list(void)
{
int i;
struct {
const char *encoded;
QLitObject decoded;
} test_cases[] = {
{
.encoded = "[43,42]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
QLIT_QNUM(42),
{ }
})),
},
{
.encoded = "[43]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
{ }
})),
},
{
.encoded = "[]",
.decoded = QLIT_QLIST(((QLitObject[]){
{ }
})),
},
{
.encoded = "[{}]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QDICT(((QLitDictEntry[]){
{},
})),
{},
})),
},
{ }
};
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QString *str;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
str = qobject_to_json(obj);
qobject_unref(obj);
obj = qobject_from_json(qstring_get_str(str), &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
qobject_unref(obj);
qobject_unref(str);
}
}
static void simple_whitespace(void)
{
int i;
struct {
const char *encoded;
QLitObject decoded;
} test_cases[] = {
{
.encoded = " [ 43 , 42 ]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
QLIT_QNUM(42),
{ }
})),
},
{
.encoded = "\t[ 43 , { 'h' : 'b' },\r\n\t[ ], 42 ]\n",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
QLIT_QDICT(((QLitDictEntry[]){
{ "h", QLIT_QSTR("b") },
{ }})),
QLIT_QLIST(((QLitObject[]){
{ }})),
QLIT_QNUM(42),
{ }
})),
},
{
.encoded = " [ 43 , { 'h' : 'b' , 'a' : 32 }, [ ], 42 ]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
QLIT_QDICT(((QLitDictEntry[]){
{ "h", QLIT_QSTR("b") },
{ "a", QLIT_QNUM(32) },
{ }})),
QLIT_QLIST(((QLitObject[]){
{ }})),
QLIT_QNUM(42),
{ }
})),
},
{ }
};
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QString *str;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
str = qobject_to_json(obj);
qobject_unref(obj);
obj = qobject_from_json(qstring_get_str(str), &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
qobject_unref(obj);
qobject_unref(str);
}
}
static void simple_interpolation(void)
{
QObject *embedded_obj;
QObject *obj;
QLitObject decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(1),
QLIT_QNUM(2),
QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(32),
QLIT_QNUM(42),
{}})),
{}}));
embedded_obj = qobject_from_json("[32, 42]", &error_abort);
g_assert(embedded_obj != NULL);
obj = qobject_from_jsonf_nofail("[%d, 2, %p]", 1, embedded_obj);
g_assert(qlit_equal_qobject(&decoded, obj));
qobject_unref(obj);
}
static void empty_input(void)
{
Error *err = NULL;
QObject *obj;
obj = qobject_from_json("", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void blank_input(void)
{
Error *err = NULL;
QObject *obj;
obj = qobject_from_json("\n ", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void junk_input(void)
{
/* Note: junk within strings is covered elsewhere */
Error *err = NULL;
QObject *obj;
obj = qobject_from_json("@", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("{\x01", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("[0\xFF]", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("00", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("[1e", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("truer", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_string(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("\"abc", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_sq_string(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("'abc", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_escape(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("\"abc\\\"", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_array(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("[32", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_array_comma(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("[32,", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void invalid_array_comma(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("[32,}", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_dict(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("{'abc':32", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_dict_comma(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("{'abc':32,", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void invalid_dict_comma(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("{'abc':32,}", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_literal(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("nul", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static char *make_nest(char *buf, size_t cnt)
{
memset(buf, '[', cnt - 1);
buf[cnt - 1] = '{';
buf[cnt] = '}';
memset(buf + cnt + 1, ']', cnt - 1);
buf[2 * cnt] = 0;
return buf;
}
static void limits_nesting(void)
{
Error *err = NULL;
enum { max_nesting = 1024 }; /* see qobject/json-streamer.c */
char buf[2 * (max_nesting + 1) + 1];
QObject *obj;
obj = qobject_from_json(make_nest(buf, max_nesting), &error_abort);
g_assert(obj != NULL);
qobject_unref(obj);
obj = qobject_from_json(make_nest(buf, max_nesting + 1), &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void multiple_values(void)
{
Error *err = NULL;
QObject *obj;
obj = qobject_from_json("false true", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("} true", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
g_test_add_func("/literals/string/escaped", escaped_string);
g_test_add_func("/literals/string/quotes", string_with_quotes);
g_test_add_func("/literals/string/utf8", utf8_string);
g_test_add_func("/literals/number/simple", simple_number);
g_test_add_func("/literals/number/large", large_number);
g_test_add_func("/literals/number/float", float_number);
g_test_add_func("/literals/keyword", keyword_literal);
g_test_add_func("/literals/interpolation/valid", interpolation_valid);
g_test_add_func("/literals/interpolation/unkown", interpolation_unknown);
g_test_add_func("/literals/interpolation/string", interpolation_string);
g_test_add_func("/dicts/simple_dict", simple_dict);
g_test_add_func("/dicts/large_dict", large_dict);
g_test_add_func("/lists/simple_list", simple_list);
g_test_add_func("/mixed/simple_whitespace", simple_whitespace);
g_test_add_func("/mixed/interpolation", simple_interpolation);
g_test_add_func("/errors/empty", empty_input);
g_test_add_func("/errors/blank", blank_input);
g_test_add_func("/errors/junk", junk_input);
g_test_add_func("/errors/unterminated/string", unterminated_string);
g_test_add_func("/errors/unterminated/escape", unterminated_escape);
g_test_add_func("/errors/unterminated/sq_string", unterminated_sq_string);
g_test_add_func("/errors/unterminated/array", unterminated_array);
g_test_add_func("/errors/unterminated/array_comma", unterminated_array_comma);
g_test_add_func("/errors/unterminated/dict", unterminated_dict);
g_test_add_func("/errors/unterminated/dict_comma", unterminated_dict_comma);
g_test_add_func("/errors/invalid_array_comma", invalid_array_comma);
g_test_add_func("/errors/invalid_dict_comma", invalid_dict_comma);
g_test_add_func("/errors/unterminated/literal", unterminated_literal);
g_test_add_func("/errors/limits/nesting", limits_nesting);
g_test_add_func("/errors/multiple_values", multiple_values);
return g_test_run();
}
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