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Simplify memory manager

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Justine Tunney 2024-07-04 10:52:16 -07:00
parent 5a9a08d1cf
commit 01587de761
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GPG key ID: BE714B4575D6E328
40 changed files with 451 additions and 311 deletions
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35
test/libc/intrin/mprotect_test.c
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@ -120,9 +120,9 @@ void TearDown(void) {
}
TEST(mprotect, testOkMemory) {
char *p = gc(memalign(getauxval(AT_PAGESZ), getauxval(AT_PAGESZ)));
char *p = gc(memalign(getpagesize(), getpagesize()));
p[0] = 0;
ASSERT_NE(-1, mprotect(p, getauxval(AT_PAGESZ), PROT_READ | PROT_WRITE));
ASSERT_NE(-1, mprotect(p, getpagesize(), PROT_READ | PROT_WRITE));
p[0] = 1;
EXPECT_EQ(1, p[0]);
EXPECT_FALSE(gotsegv);
@ -131,20 +131,19 @@ TEST(mprotect, testOkMemory) {
TEST(mprotect, testSegfault_writeToReadOnlyAnonymous) {
volatile char *p;
p = gc(memalign(getauxval(AT_PAGESZ), getauxval(AT_PAGESZ)));
p = gc(memalign(getpagesize(), getpagesize()));
EXPECT_FALSE(gotsegv);
p[0] = 1;
EXPECT_FALSE(gotsegv);
EXPECT_FALSE(gotbusted);
EXPECT_NE(-1, mprotect((void *)p, getauxval(AT_PAGESZ), PROT_READ));
EXPECT_NE(-1, mprotect((void *)p, getpagesize(), PROT_READ));
__expropriate(p[0]);
EXPECT_FALSE(gotsegv);
EXPECT_FALSE(gotbusted);
p[0] = 2;
EXPECT_TRUE(gotsegv | gotbusted);
EXPECT_EQ(1, p[0]);
EXPECT_NE(-1,
mprotect((void *)p, getauxval(AT_PAGESZ), PROT_READ | PROT_WRITE));
EXPECT_NE(-1, mprotect((void *)p, getpagesize(), PROT_READ | PROT_WRITE));
}
TEST(mprotect, testExecOnly_canExecute) {
@ -164,22 +163,21 @@ TEST(mprotect, testExecOnly_canExecute) {
TEST(mprotect, testProtNone_cantEvenRead) {
volatile char *p;
p = gc(memalign(getauxval(AT_PAGESZ), getauxval(AT_PAGESZ)));
EXPECT_NE(-1, mprotect((void *)p, getauxval(AT_PAGESZ), PROT_NONE));
p = gc(memalign(getpagesize(), getpagesize()));
EXPECT_NE(-1, mprotect((void *)p, getpagesize(), PROT_NONE));
__expropriate(p[0]);
EXPECT_TRUE(gotsegv | gotbusted);
EXPECT_NE(-1,
mprotect((void *)p, getauxval(AT_PAGESZ), PROT_READ | PROT_WRITE));
EXPECT_NE(-1, mprotect((void *)p, getpagesize(), PROT_READ | PROT_WRITE));
}
TEST(mprotect, testExecJit_actuallyWorks) {
int (*p)(void) = gc(memalign(getauxval(AT_PAGESZ), getauxval(AT_PAGESZ)));
int (*p)(void) = gc(memalign(getpagesize(), getpagesize()));
memcpy(p, kRet31337, sizeof(kRet31337));
EXPECT_NE(-1, mprotect(p, getauxval(AT_PAGESZ), PROT_EXEC));
EXPECT_NE(-1, mprotect(p, getpagesize(), PROT_EXEC));
EXPECT_EQ(31337, p());
EXPECT_FALSE(gotsegv);
EXPECT_FALSE(gotbusted);
EXPECT_NE(-1, mprotect(p, getauxval(AT_PAGESZ), PROT_READ | PROT_WRITE));
EXPECT_NE(-1, mprotect(p, getpagesize(), PROT_READ | PROT_WRITE));
}
TEST(mprotect, testRwxMap_vonNeumannRules) {
@ -187,14 +185,13 @@ TEST(mprotect, testRwxMap_vonNeumannRules) {
return; // boo
if (IsXnuSilicon())
return; // boo
int (*p)(void) = gc(memalign(getauxval(AT_PAGESZ), getauxval(AT_PAGESZ)));
int (*p)(void) = gc(memalign(getpagesize(), getpagesize()));
memcpy(p, kRet31337, sizeof(kRet31337));
EXPECT_NE(-1, mprotect(p, getauxval(AT_PAGESZ),
PROT_READ | PROT_WRITE | PROT_EXEC));
EXPECT_NE(-1, mprotect(p, getpagesize(), PROT_READ | PROT_WRITE | PROT_EXEC));
EXPECT_EQ(31337, p());
EXPECT_FALSE(gotsegv);
EXPECT_FALSE(gotbusted);
EXPECT_NE(-1, mprotect(p, getauxval(AT_PAGESZ), PROT_READ | PROT_WRITE));
EXPECT_NE(-1, mprotect(p, getpagesize(), PROT_READ | PROT_WRITE));
}
TEST(mprotect, testExecuteFlatFileMapOpenedAsReadonly) {
@ -231,13 +228,13 @@ TEST(mprotect, testFileMap_canChangeToExecWhileOpenInRdwrMode) {
}
TEST(mprotect, testBadProt_failsEinval) {
volatile char *p = gc(memalign(getauxval(AT_PAGESZ), getauxval(AT_PAGESZ)));
volatile char *p = gc(memalign(getpagesize(), getpagesize()));
EXPECT_EQ(-1, mprotect((void *)p, 9999, -1));
EXPECT_EQ(EINVAL, errno);
}
TEST(mprotect, testZeroSize_doesNothing) {
volatile char *p = gc(memalign(getauxval(AT_PAGESZ), getauxval(AT_PAGESZ)));
volatile char *p = gc(memalign(getpagesize(), getpagesize()));
EXPECT_NE(-1, mprotect((void *)p, 0, PROT_READ));
p[0] = 1;
EXPECT_FALSE(gotsegv);