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memtag_test: move SEGV code checks to device-side binary

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This commit is contained in:
Dmitry Muhomor 2024-01-23 12:34:52 +02:00
parent a3bf742c3e
commit bd2e6acbbb
2 changed files with 40 additions and 48 deletions
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43
androidtest/memtag/memtag_test.cc
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@ -204,54 +204,63 @@ u8* alloc_default() {
}
}
volatile u8 u8_var;
int expected_segv_code;
#define expect_segv(exp, segv_code) ({\
expected_segv_code = segv_code; \
volatile auto val = exp; \
(void) val; \
do_context_switch(); \
fprintf(stderr, "didn't receive SEGV code %i", segv_code); \
exit(1); })
// it's expected that the device is configured to use asymm MTE tag checking mode (sync read checks,
// async write checks)
#define expect_read_segv(exp) expect_segv(exp, SEGV_MTESERR)
#define expect_write_segv(exp) expect_segv(exp, SEGV_MTEAERR)
void read_after_free() {
u8 *p = alloc_default();
free(p);
volatile u8 v = p[0];
(void) v;
expect_read_segv(p[0]);
}
void write_after_free() {
u8 *p = alloc_default();
free(p);
p[0] = 1;
expect_write_segv(p[0] = 1);
}
void underflow_read() {
u8 *p = alloc_default();
volatile u8 v = p[-1];
(void) v;
expect_read_segv(p[-1]);
}
void underflow_write() {
u8 *p = alloc_default();
p[-1] = 1;
expect_write_segv(p[-1] = 1);
}
void overflow_read() {
u8 *p = alloc_default();
volatile u8 v = p[DEFAULT_ALLOC_SIZE + CANARY_SIZE];
(void) v;
expect_read_segv(p[DEFAULT_ALLOC_SIZE + CANARY_SIZE]);
}
void overflow_write() {
u8 *p = alloc_default();
p[DEFAULT_ALLOC_SIZE + CANARY_SIZE] = 1;
expect_write_segv(p[DEFAULT_ALLOC_SIZE + CANARY_SIZE] = 1);
}
void untagged_read() {
u8 *p = alloc_default();
p = (u8 *) untag_pointer(p);
volatile u8 v = p[0];
(void) v;
expect_read_segv(p[0]);
}
void untagged_write() {
u8 *p = alloc_default();
p = (u8 *) untag_pointer(p);
p[0] = 1;
expect_write_segv(p[0] = 1);
}
map<string, function<void()>> tests = {
@ -269,8 +278,12 @@ map<string, function<void()>> tests = {
};
void segv_handler(int, siginfo_t *si, void *) {
fprintf(stderr, "SEGV_CODE %i", si->si_code);
exit(139); // standard exit code for SIGSEGV
if (expected_segv_code == 0 || expected_segv_code != si->si_code) {
fprintf(stderr, "received unexpected SEGV_CODE %i", si->si_code);
exit(139); // standard exit code for SIGSEGV
}
exit(0);
}
int main(int argc, char **argv) {

45
androidtest/src/grapheneos/hmalloc/MemtagTest.java
View File

@ -7,36 +7,15 @@ import com.android.tradefed.testtype.junit4.BaseHostJUnit4Test;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.io.IOException;
import java.util.ArrayList;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
@RunWith(DeviceJUnit4ClassRunner.class)
public class MemtagTest extends BaseHostJUnit4Test {
private static final String TEST_BINARY = "/data/local/tmp/memtag_test";
enum Result {
SUCCESS(0, ""),
// it's expected that the device is configured to use asymm MTE tag checking mode
ASYNC_MTE_ERROR(139, "SEGV_CODE 8"),
SYNC_MTE_ERROR(139, "SEGV_CODE 9"),
;
public final int exitCode;
public final String stderr;
Result(int exitCode, String stderr) {
this.exitCode = exitCode;
this.stderr = stderr;
}
}
private static final int SEGV_EXIT_CODE = 139;
private void runTest(String name, Result expectedResult) throws DeviceNotAvailableException {
private void runTest(String name) throws DeviceNotAvailableException {
var args = new ArrayList<String>();
args.add(TEST_BINARY);
args.add(name);
@ -44,52 +23,52 @@ public class MemtagTest extends BaseHostJUnit4Test {
var result = getDevice().executeShellV2Command(cmdLine);
assertEquals("process exit code", expectedResult.exitCode, result.getExitCode().intValue());
assertEquals("stderr", expectedResult.stderr, result.getStderr());
assertEquals("stderr", "", result.getStderr());
assertEquals("process exit code", 0, result.getExitCode().intValue());
}
@Test
public void tag_distinctness() throws DeviceNotAvailableException {
runTest("tag_distinctness", Result.SUCCESS);
runTest("tag_distinctness");
}
@Test
public void read_after_free() throws DeviceNotAvailableException {
runTest("read_after_free", Result.SYNC_MTE_ERROR);
runTest("read_after_free");
}
@Test
public void write_after_free() throws DeviceNotAvailableException {
runTest("write_after_free", Result.ASYNC_MTE_ERROR);
runTest("write_after_free");
}
@Test
public void underflow_read() throws DeviceNotAvailableException {
runTest("underflow_read", Result.SYNC_MTE_ERROR);
runTest("underflow_read");
}
@Test
public void underflow_write() throws DeviceNotAvailableException {
runTest("underflow_write", Result.ASYNC_MTE_ERROR);
runTest("underflow_write");
}
@Test
public void overflow_read() throws DeviceNotAvailableException {
runTest("overflow_read", Result.SYNC_MTE_ERROR);
runTest("overflow_read");
}
@Test
public void overflow_write() throws DeviceNotAvailableException {
runTest("overflow_write", Result.ASYNC_MTE_ERROR);
runTest("overflow_write");
}
@Test
public void untagged_read() throws DeviceNotAvailableException {
runTest("untagged_read", Result.SYNC_MTE_ERROR);
runTest("untagged_read");
}
@Test
public void untagged_write() throws DeviceNotAvailableException {
runTest("untagged_write", Result.ASYNC_MTE_ERROR);
runTest("untagged_write");
}
}