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Remove undefined behaviors

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This commit is contained in:
Justine Tunney 2021-05-16 11:16:28 -07:00
parent 4864565198
commit b3838173ec
51 changed files with 756 additions and 1302 deletions
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6
test/libc/calls/sigaction_test.c
View file

@ -103,10 +103,14 @@ void OnFpe(int sig, struct siginfo *si, struct ucontext *ctx) {
ctx->uc_mcontext.rdx = 0;
}
TEST(sigaction, sigFpe_handlerCanEditProcessStateAndRecoverExecution) {
noubsan void ubsanTrumpsSystemsEngineering(void) {
struct sigaction saint = {.sa_sigaction = OnFpe, .sa_flags = SA_SIGINFO};
EXPECT_NE(-1, sigaction(SIGFPE, &saint, &oldsa));
volatile long x = 0;
EXPECT_EQ(42, 666 / x); /* systems engineering trumps math */
EXPECT_NE(-1, sigaction(SIGFPE, &oldsa, NULL));
}
TEST(sigaction, sigFpe_handlerCanEditProcessStateAndRecoverExecution) {
ubsanTrumpsSystemsEngineering();
}

56
test/libc/intrin/intrin_test.c
View file

@ -83,6 +83,7 @@
#include "libc/intrin/psrlq.h"
#include "libc/intrin/psrlw.h"
#include "libc/intrin/psubb.h"
#include "libc/intrin/psubd.h"
#include "libc/intrin/psubq.h"
#include "libc/intrin/psubsb.h"
#include "libc/intrin/psubsw.h"
@ -581,7 +582,7 @@ TEST(punpckhbw, fuzz) {
TEST(psubq, fuzz) {
int i, j;
int64_t x[2], y[2], a[2], b[2];
uint64_t x[2], y[2], a[2], b[2];
for (i = 0; i < 100; ++i) {
RngSet(x, sizeof(x));
RngSet(y, sizeof(y));
@ -660,7 +661,7 @@ TEST(psradv, test) {
for (i = 0; i < 100; ++i) {
RngSet(x, sizeof(x));
for (j = 0; j < 2; ++j) {
y[j] = Rando() % 64;
y[j] = Rando() % 70;
}
psradv(a, x, y);
(psradv)(b, x, y);
@ -843,7 +844,7 @@ TEST(pmullw, fuzz) {
TEST(pmulld, fuzz) {
int i, j;
int32_t x[4], y[4], a[4], b[4];
uint32_t x[4], y[4], a[4], b[4];
for (i = 0; i < 1000; ++i) {
RngSet(x, sizeof(x));
RngSet(y, sizeof(y));
@ -906,8 +907,8 @@ TEST(phaddw, fuzz) {
TEST(phaddd, fuzz) {
int i, j;
int32_t x[4], y[4];
int32_t a[4], b[4];
uint32_t x[4], y[4];
uint32_t a[4], b[4];
for (i = 0; i < 1000; ++i) {
RngSet(x, sizeof(x));
RngSet(y, sizeof(y));
@ -938,8 +939,8 @@ TEST(phsubw, fuzz) {
TEST(phsubd, fuzz) {
int i, j;
int32_t x[4], y[4];
int32_t a[4], b[4];
uint32_t x[4], y[4];
uint32_t a[4], b[4];
for (i = 0; i < 1000; ++i) {
RngSet(x, sizeof(x));
RngSet(y, sizeof(y));
@ -952,6 +953,22 @@ TEST(phsubd, fuzz) {
}
}
TEST(psubd, fuzz) {
int i, j;
uint32_t x[4], y[4];
uint32_t a[4], b[4];
for (i = 0; i < 1000; ++i) {
RngSet(x, sizeof(x));
RngSet(y, sizeof(y));
psubd(a, x, y);
(psubd)(b, x, y);
ASSERT_EQ(0, memcmp(a, b, 16));
psubd(a, (void *)a, y);
(psubd)(b, (void *)b, y);
ASSERT_EQ(0, memcmp(a, b, 16));
}
}
TEST(phaddsw, fuzz) {
int i, j;
int16_t x[8], y[8];
@ -1157,7 +1174,7 @@ TEST(pandn, fuzz) {
TEST(paddq, fuzz) {
int i, j;
int64_t x[2], y[2], a[2], b[2];
uint64_t x[2], y[2], a[2], b[2];
for (i = 0; i < 100; ++i) {
for (j = 0; j < 2; ++j) x[j] = Rando();
for (j = 0; j < 2; ++j) y[j] = Rando();
@ -1444,6 +1461,12 @@ TEST(pabsd, fuzz) {
int i, j;
int32_t x[4];
uint32_t a[4], b[4];
x[0] = INT_MIN;
pabsd((uint32_t *)x, x);
EXPECT_EQ(INT_MIN, x[0]);
x[0] = INT_MIN;
(pabsd)((uint32_t *)x, x);
EXPECT_EQ(INT_MIN, x[0]);
for (i = 0; i < 100; ++i) {
RngSet(x, sizeof(x));
pabsd(a, x);
@ -1497,6 +1520,16 @@ TEST(psignd, fuzz) {
}
}
TEST(psignd, testBane) {
int32_t x[4] = {INT_MIN, INT_MIN, INT_MIN, INT_MIN};
int32_t y[4] = {0, 1, -1, INT_MIN};
psignd(x, x, y);
EXPECT_EQ(0, x[0]);
EXPECT_EQ(INT_MIN, x[1]);
EXPECT_EQ(INT_MIN, x[2]);
EXPECT_EQ(INT_MIN, x[3]);
}
TEST(paddb, fuzz) {
int i, j;
int8_t x[16], y[16], a[16], b[16];
@ -1574,7 +1607,12 @@ TEST(psubsw, fuzz) {
TEST(paddd, fuzz) {
int i, j;
int32_t x[4], y[4], a[4], b[4];
uint32_t x[4], y[4], a[4], b[4];
RngSet(x, sizeof(x));
RngSet(y, sizeof(y));
x[0] = 0x7fffffff;
y[0] = 0x7fffffff;
(paddd)(b, x, y);
for (i = 0; i < 100; ++i) {
RngSet(x, sizeof(x));
RngSet(y, sizeof(y));

7
test/libc/intrin/pmulhrsw_test.c
View file

@ -78,6 +78,13 @@ TEST(pmulhrsw, testLimits) {
EXPECT_EQ(kPmulhrswTorture[i][2], A[0], "pmulhrsw(%hd,%hd)→%hd",
kPmulhrswTorture[i][0], kPmulhrswTorture[i][1], A[0]);
}
for (i = 0; i < ARRAYLEN(kPmulhrswTorture); ++i) {
A[0] = kPmulhrswTorture[i][0];
B[0] = kPmulhrswTorture[i][1];
(pmulhrsw)(A, A, B);
EXPECT_EQ(kPmulhrswTorture[i][2], A[0], "pmulhrsw(%hd,%hd)→%hd",
kPmulhrswTorture[i][0], kPmulhrswTorture[i][1], A[0]);
}
}
TEST(pmulhrsw, testFakeFloat) {