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cosmopolitan/test/libc/intrin/kprintf_test.c
Justine Tunney 7e0a09feec
Mint APE Loader v1.5 
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi
users can run programs like redbean, without the executable needing
to modify itself. Progress has also slipped into this change on the
issue of making progress better conforming to user expectations and
industry standards regarding which symbols we're allowed to declare
2023-07-26 13:54:49 -07:00

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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/kprintf.h"
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/fmt/fmt.h"
#include "libc/intrin/bits.h"
#include "libc/limits.h"
#include "libc/log/libfatal.internal.h"
#include "libc/macros.internal.h"
#include "libc/runtime/memtrack.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/symbols.internal.h"
#include "libc/stdio/rand.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/prot.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
#define S(x) ((uintptr_t)(x))
/**
* returns random bytes that don't have exclamation mark
* since that would disable memory safety in the fuzzing
*/
static uint64_t Rando(void) {
uint64_t x;
do x = lemur64();
while (((x ^ READ64LE("!!!!!!!!")) - 0x0101010101010101) &
~(x ^ READ64LE("!!!!!!!!")) & 0x8080808080808080);
return x;
}
static const struct {
const char *want;
const char *fmt;
uintptr_t arg1;
uintptr_t arg2;
} V[] = {
{"!!WONTFMT", (const char *)31337, 123}, //
{"!!31337", "%s", 0x31337}, //
{"!!1", "%#s", 1}, //
{"!!feff800000031337", "%s", 0xfeff800000031337ull}, //
{"!!ffff800000031337", "%s", 0xffff800000031337ull}, //
{"123", "%d", 123}, //
{"2147483647", "%d", INT_MAX}, //
{"-2147483648", "%d", INT_MIN}, //
{"9223372036854775807", "%ld", LONG_MAX}, //
{"-9223372036854775808", "%ld", LONG_MIN}, //
{"9'223'372'036'854'775'807", "%'ld", LONG_MAX}, //
{"-9'223'372'036'854'775'808", "%'ld", LONG_MIN}, //
{"9,223,372,036,854,775,807", "%,ld", LONG_MAX}, //
{"-9,223,372,036,854,775,808", "%,ld", LONG_MIN}, //
{"9_223_372_036_854_775_807", "%_ld", LONG_MAX}, //
{"-9_223_372_036_854_775_808", "%_ld", LONG_MIN}, //
{"true", "%hhhd", 0xffff}, //
{"true", "%hhhd", 0xff00}, //
{"false", "%hhhd"}, //
{"fa", "%hhh.2d"}, //
{" 0x001337", "%#010.6x", 0x1337}, //
{"0x001337 ", "%#-010.6x", 0x1337}, //
{"0x1337 ", "%#-010.2x", 0x1337}, //
{" 0x1337", "%#010.2x", 0x1337}, //
{"0000001337", "%010d", 1337}, //
{"+000001337", "%+010d", 1337}, //
{" 001337", "%010.6d", 1337}, //
{" +001337", "%+010.6d", 1337}, //
{" 001337", "%010.6x", 0x1337}, //
{" 1337", "%010.2x", 0x1337}, //
{"1337 ", "%-010d", 1337}, //
{"001337 ", "%-010.6d", 1337}, //
{"+1337 ", "%+-010d", 1337}, //
{"+001337 ", "%+-010.6d", 1337}, //
{"001337 ", "%-010.6x", 0x1337}, //
{"1337 ", "%-010.2x", 0x1337}, //
{"000001'337", "%'010d", 1337}, //
{" 1337", "%*d", 10, 1337}, //
{"1337 ", "%*d", -10, 1337}, //
{"0", "%#x"}, //
{"0", "%#o"}, //
{"0", "%#b"}, //
{"0", "%#d"}, //
{"0", "%p"}, //
{"-1", "%p", S(MAP_FAILED)}, //
{"00000000", "%#.8x"}, //
{"00000000", "%#.8b"}, //
{"00000000", "%#.8o"}, //
{" 123", "%5d", 123}, //
{" -123", "%5d", -123}, //
{" 123", "%*d", 5, 123}, //
{" -123", "%*d", 5, -123}, //
{"123 ", "%-5d", 123}, //
{"-123 ", "%-5d", -123}, //
{" +123", "%+5d", 123}, //
{"00123", "%05d", 123}, //
{"-0123", "%05d", -123}, //
{" 0", "%5d"}, //
{" +0", "%+5d"}, //
{"00000", "%05d"}, //
{" deadbeef", "%20x", 0xdeadbeef}, //
{" 0xdeadbeef", "%20p", 0xdeadbeef}, //
{"101", "%b", 0b101}, //
{"123", "%x", 0x123}, //
{"deadbeef", "%x", 0xdeadbeef}, //
{"DEADBEEF", "%X", 0xdeadbeef}, //
{"0", "%hd", INT_MIN}, //
{"123", "%o", 0123}, //
{"+0", "%+d"}, //
{"+123", "%+d", 123}, //
{"-123", "%+d", -123}, //
{" 0", "% d"}, //
{" 123", "% d", 123}, //
{"-123", "% d", -123}, //
{"x", "%c", 'x'}, //
{"☺", "%hc", u'☺'}, //
{"☺", "%lc", L'☺'}, //
{"☺", "%C", L'☺'}, //
{"0x31337", "%p", 0x31337}, //
{"0xffff800000031337", "%p", 0xffff800000031337ull}, //
{"0xfeff800000031337", "%p", 0xfeff800000031337ull}, //
{"65535", "%hu", 0xffffffffu}, //
{"0", "%hu", 0x80000000u}, //
{"123", "%hd", 123}, //
{"32767", "%hd", SHRT_MAX}, //
{"-32768", "%hd", SHRT_MIN}, //
{"-1", "%hhd", 0xffff}, //
{"-128", "%hhd", 0xff80}, //
{"255", "%hhu", 0xffffffffu}, //
{"'x'", "%#c", 'x'}, //
{"u'☺'", "%#hc", u'☺'}, //
{"L'☺'", "%#lc", L'☺'}, //
{"L'☺'", "%#C", L'☺'}, //
{"L'\\''", "%#C", L'\''}, //
{"hello world\n", "%s", S("hello world\n")}, //
{"☺☻♥♦♣♠!\n", "%s", S("☺☻♥♦♣♠!\n")}, //
{"␁", "%s", S("\1")}, //
{"\1", "%.*s", 1, S("\1")}, //
{"\\001", "%'s", S("\1")}, //
{"\"\\001\"", "%#s", S("\1")}, //
{"", "%.*s", 0}, //
{"☺☻♥♦♣♠!", "%hhs", S("\1\2\3\4\5\6!")}, //
{"☺☻", "%.*hhs", 2, S("\1\2\3\4\5\6!")}, //
{"u\"☺☻\"", "%#.*hhs", 2, S("\1\2\3\4\5\6!")}, //
{"u\" ☻\"", "%#.*hhs", 2, S("\0\2\3\4\5\6!")}, //
{"", "% s", S("")}, //
{" a", "% s", S("a")}, //
{"", "% .*s", 0, S("a")}, //
{"", "% s"}, //
{"𐌰𐌱𐌲𐌳𐌴𐌵𐌶𐌷", "%hs", S(u"𐌰𐌱𐌲𐌳𐌴𐌵𐌶𐌷")}, //
{"☺☻♥♦♣♠!", "%ls", S(L"☺☻♥♦♣♠!")}, //
{"HELLO", "%^s", S("hello")}, //
{"eeeeeee ", "%10s", S("eeeeeee")}, //
{"hello", "%.*s", 5, S("hello world")}, //
{"þell", "%.*s", 5, S("þello world")}, //
{"þello", "%.*hs", 5, S(u"þello world")}, //
{"þeeeeee ", "%10s", S("þeeeeee")}, //
{"☺☻♥♦♣♠! ", "%10s", S("☺☻♥♦♣♠!")}, //
{"☺☻♥♦♣♠ ", "%10hs", S(u"☺☻♥♦♣♠")}, //
{"𐌰𐌱𐌲𐌳𐌴𐌵𐌶𐌷 ", "%10hs", S(u"𐌰𐌱𐌲𐌳𐌴𐌵𐌶𐌷")}, //
{"☺☻♥♦♣♠! ", "%10ls", S(L"☺☻♥♦♣♠!")}, //
{"\"xx\"", "%#s", S("xx")}, //
{"u\"☺☺\"", "%#hs", S(u"☺☺")}, //
{"L\"☺☺\"", "%#ls", S(L"☺☺")}, //
{"\"\\\\\\\"\\177\"", "%#s", S("\\\"\177")}, //
{"%%", "%%%%"}, //
{"%", "%.%"}, //
{"=", "%="}, //
};
TEST(ksnprintf, test) {
char b[48], g[48];
size_t i, j, n, rc;
rngset(g, sizeof(g), 0, 0);
for (i = 0; i < ARRAYLEN(V); ++i) {
bzero(b, 48);
n = strlen(V[i].want);
rc = ksnprintf(b, 48, V[i].fmt, V[i].arg1, V[i].arg2);
EXPECT_EQ(n, rc, "ksnprintf(\"%s\", %#lx, %#lx) → %zu ≠ %zu", V[i].fmt,
V[i].arg1, V[i].arg2, rc, n);
EXPECT_STREQ(V[i].want, b);
memcpy(b, g, 48);
for (j = 0; j < 40; ++j) {
rc = ksnprintf(b, 0, V[i].fmt, V[i].arg1, V[i].arg2);
ASSERT_EQ(n, rc, "ksnprintf(b, %zu, \"%s\", %#lx, %#lx) → %zu ≠ %zu", j,
V[i].fmt, V[i].arg1, V[i].arg2, rc, n);
ASSERT_EQ(READ64LE(g + j), READ64LE(b + j),
"ksnprintf(b, %zu, \"%s\", %#lx, %#lx) → buffer overrun", j,
V[i].fmt, V[i].arg1, V[i].arg2);
}
}
}
TEST(ksnprintf, testSymbols) {
char b[2][32];
bool hassymbols;
hassymbols = GetSymbolTable();
ksnprintf(b[0], 32, "%t", strlen);
if (hassymbols) {
ASSERT_STREQ("&strlen", b[0]);
} else {
ksnprintf(b[1], 32, "&%x", strlen);
ASSERT_STREQ(b[1], b[0]);
}
}
TEST(ksnprintf, fuzzTheUnbreakable) {
int e;
size_t i;
uint64_t x;
char *f, b[32];
_Alignas(FRAMESIZE) static const char weasel[FRAMESIZE];
f = __veil("r", weasel);
EXPECT_SYS(0, 0, mprotect(f, FRAMESIZE, PROT_READ | PROT_WRITE));
strcpy(f, "hello %s\n");
EXPECT_EQ(12, ksnprintf(b, sizeof(b), f, "world"));
EXPECT_STREQ("hello world\n", b);
for (i = 0; i < 30000; ++i) {
x = Rando();
memcpy(f, &x, sizeof(x));
x = Rando();
memcpy(f + 8, &x, sizeof(x));
f[Rando() & 15] = '%';
ksnprintf(b, sizeof(b), f, lemur64(), lemur64(), lemur64());
}
EXPECT_SYS(0, 0, mprotect(f, FRAMESIZE, PROT_READ));
}
TEST(kprintf, testFailure_wontClobberErrnoAndBypassesSystemCallSupport) {
int n;
const char *s = 0;
ASSERT_EQ(0, errno);
EXPECT_SYS(0, 3, dup(2));
// <LIMBO>
if (close(2)) _Exit(200);
n = __syscount;
if (__syscount != n) _Exit(201);
if (errno != 0) _Exit(202);
if (dup2(3, 2) != 2) _Exit(203);
// </LIMBO>
EXPECT_SYS(0, 0, close(3));
}
TEST(ksnprintf, testy) {
char b[32];
EXPECT_EQ(3, ksnprintf(b, 32, "%#s", 1));
EXPECT_STREQ("!!1", b);
}
TEST(ksnprintf, testNonTextFmt_wontFormat) {
char b[32];
char variable_format_string[16] = "%s";
EXPECT_EQ(9, ksnprintf(b, 32, variable_format_string, NULL));
EXPECT_STREQ("!!WONTFMT", b);
}
TEST(ksnprintf, testMisalignedPointer_wontFormat) {
char b[32];
const char16_t *s = u"hello";
ksnprintf(b, 32, "%hs", (char *)s + 1);
EXPECT_STARTSWITH("!!", b);
}
TEST(ksnprintf, testUnterminatedOverrun_truncatesAtPageBoundary) {
char *m;
char b[32];
m = memset(_mapanon(FRAMESIZE * 2), 1, FRAMESIZE);
EXPECT_SYS(0, 0, munmap(m + FRAMESIZE, FRAMESIZE));
EXPECT_EQ(12, ksnprintf(b, 32, "%'s", m + FRAMESIZE - 3));
EXPECT_STREQ("\\001\\001\\001", b);
EXPECT_SYS(0, 0, munmap(m, FRAMESIZE));
}
TEST(ksnprintf, testEmptyBuffer_determinesTrueLength) {
EXPECT_EQ(5, ksnprintf(0, 0, "hello"));
}
TEST(ksnprintf, testFormatOnly_copiesString) {
char b[6];
EXPECT_EQ(5, ksnprintf(b, 6, "hello"));
EXPECT_STREQ("hello", b);
}
TEST(ksnprintf, testOneChar_justNulTerminates) {
char b[2] = {1, 2};
EXPECT_EQ(3, ksnprintf(b, 1, "%d", 123));
EXPECT_EQ(0, b[0]);
EXPECT_EQ(2, b[1]);
}
TEST(kprintf, testStringUcs2) {
char b[32];
EXPECT_EQ(21, ksnprintf(b, 32, "%hs", u"þ☺☻♥♦♣♠!"));
EXPECT_EQ(0xc3, b[0] & 255);
EXPECT_EQ(0xbe, b[1] & 255);
EXPECT_EQ(0xe2, b[2] & 255);
EXPECT_EQ(0x98, b[3] & 255);
EXPECT_EQ(0xba, b[4] & 255);
EXPECT_STREQ("þ☺☻♥♦♣♠!", b);
}
TEST(kprintf, testTruncate_addsDotsAndReturnsTrueLength) {
char b[15];
EXPECT_EQ(10, ksnprintf(b, 15, "%p", 0xdeadbeef));
EXPECT_STREQ("0xdeadbeef", b);
EXPECT_EQ(10, ksnprintf(b, 10, "%p", 0xdeadbeef));
EXPECT_STREQ("0xdead...", b);
}
TEST(kprintf, testTruncate_preservesNewlineFromEndOfFormatString) {
char b[14];
EXPECT_EQ(11, ksnprintf(b, 10, "%p\n", 0xdeadbeef));
EXPECT_STREQ("0xdea...\n", b);
}
TEST(ksnprintf, testTruncate_doesntBreakApartCharacters) {
char b[5];
ASSERT_EQ(6, ksnprintf(b, 5, "☻☻"));
ASSERT_STREQ("....", b);
}
TEST(ksnprintf, badUtf16) {
size_t i;
char b[16];
static const struct {
const char *want;
const char *fmt;
char16_t arg[16];
} V[] = {
{"<EFBFBD> ", "%10hs", {0xd800}},
{"<EFBFBD> ", "%10hs", {0xdc00}},
{"<EFBFBD><EFBFBD> ", "%10hs", {0xd800, 0xd800}},
{"<EFBFBD><EFBFBD> ", "%10hs", {0xdc00, 0xdc00}},
};
for (i = 0; i < ARRAYLEN(V); ++i) {
EXPECT_EQ(strlen(V[i].want), ksnprintf(b, 16, V[i].fmt, V[i].arg));
EXPECT_STREQ(V[i].want, b);
}
}
TEST(ksnprintf, negativeOverflowIdiom_isSafe) {
int i, n;
char golden[11];
struct {
char underflow[11];
char buf[11];
char overflow[11];
} u;
memset(golden, -1, 11);
memset(u.underflow, -1, 11);
memset(u.overflow, -1, 11);
i = 0;
n = 11;
i += ksnprintf(u.buf + i, n - i, "hello");
ASSERT_STREQ("hello", u.buf);
i += ksnprintf(u.buf + i, n - i, " world");
ASSERT_STREQ("hello w...", u.buf);
i += ksnprintf(u.buf + i, n - i, " i love you");
ASSERT_STREQ("hello w...", u.buf);
ASSERT_EQ(i, 5 + 6 + 11);
ASSERT_EQ(0, memcmp(golden, u.underflow, 11));
ASSERT_EQ(0, memcmp(golden, u.overflow, 11));
}
TEST(ksnprintf, truncation) {
char buf[16] = {0};
rngset(buf, sizeof(buf) - 1, lemur64, -1);
ksnprintf(0, 0, "%s", "xxxxx");
rngset(buf, sizeof(buf) - 1, lemur64, -1);
ksnprintf(buf, 1, "%s", "xxxxx");
EXPECT_STREQ("", buf);
rngset(buf, sizeof(buf) - 1, lemur64, -1);
ksnprintf(buf, 2, "%s", "xxxxx");
EXPECT_STREQ(".", buf);
rngset(buf, sizeof(buf) - 1, lemur64, -1);
ksnprintf(buf, 3, "%s", "xxxxx");
EXPECT_STREQ("..", buf);
rngset(buf, sizeof(buf) - 1, lemur64, -1);
ksnprintf(buf, 4, "%s", "xxxxx");
EXPECT_STREQ("...", buf);
rngset(buf, sizeof(buf) - 1, lemur64, -1);
ksnprintf(buf, 5, "%s", "xxxxx");
EXPECT_STREQ("x...", buf);
rngset(buf, sizeof(buf) - 1, lemur64, -1);
ksnprintf(buf, 6, "%s", "xxxxxxxxxxx");
EXPECT_STREQ("xx...", buf);
rngset(buf, sizeof(buf) - 1, lemur64, -1);
ksnprintf(buf, 7, "%s", "xxxxxxxxx");
EXPECT_STREQ("xxx...", buf);
}
BENCH(printf, bench) {
char b[128];
int snprintf_(char *, size_t, const char *, ...) asm("snprintf");
EZBENCH2("ksnprintf fmt", donothing, ksnprintf(b, 128, "."));
EZBENCH2("snprintf fmt", donothing, snprintf_(b, 128, "."));
EZBENCH2("ksnprintf str", donothing,
ksnprintf(b, 128, "%s\n", "hello world"));
EZBENCH2("snprintf str", donothing,
snprintf_(b, 128, "%s\n", "hello world"));
EZBENCH2("ksnprintf utf8", donothing,
ksnprintf(b, 128, "%s\n", "天地玄黄宇宙洪荒天地玄黄宇宙洪荒"));
EZBENCH2("snprintf utf8", donothing,
snprintf_(b, 128, "%s\n", "天地玄黄宇宙洪荒天地玄黄宇宙洪荒"));
EZBENCH2("ksnprintf chinese", donothing,
ksnprintf(b, 128, "%hs\n", u"天地玄黄宇宙洪荒"));
EZBENCH2("snprintf chinese", donothing,
snprintf_(b, 128, "%hs\n", u"天地玄黄宇宙洪荒"));
EZBENCH2("ksnprintf astral", donothing,
ksnprintf(b, 128, "%hs\n", u"𐌰𐌱𐌲𐌳𐌴𐌵𐌶𐌷"));
EZBENCH2("snprintf astral", donothing,
snprintf_(b, 128, "%hs\n", u"𐌰𐌱𐌲𐌳𐌴𐌵𐌶𐌷"));
EZBENCH2("ksnprintf octal", donothing, ksnprintf(b, 128, "%#lo", ULONG_MAX));
EZBENCH2("snprintf octal", donothing, snprintf(b, 128, "%#lo", ULONG_MAX));
EZBENCH2("ksnprintf long", donothing, ksnprintf(b, 128, "%ld", LONG_MAX));
EZBENCH2("snprintf long", donothing, snprintf_(b, 128, "%ld", LONG_MAX));
EZBENCH2("ksnprintf thou", donothing, ksnprintf(b, 128, "%'ld", LONG_MAX));
EZBENCH2("snprintf thou", donothing, snprintf_(b, 128, "%'ld", LONG_MAX));
EZBENCH2(
"ksnprintf bin", donothing,
ksnprintf(b, 128, "%#.*hhs\n", 8, "\001\002\003\004\005\006\007\008"));
EZBENCH2(
"snprintf bin", donothing,
snprintf(b, 128, "%`'.*hhs\n", 8, "\001\002\003\004\005\006\007\008"));
}
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