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[src/trunk]: src/tests/lib/libc/sys Add new ATF ptrace(2) tests bytes_transfe...
details: https://anonhg.NetBSD.org/src/rev/0a661cbb91a9
branches: trunk
changeset: 997827:0a661cbb91a9
user: kamil <kamil%NetBSD.org@localhost>
date: Thu Mar 28 08:13:40 2019 +0000
description:
Add new ATF ptrace(2) tests bytes_transfer_alignment*
Verify bytes transfer for potentially misaligned operation.
New tests:
- bytes_transfer_alignment_pt_read_i
- bytes_transfer_alignment_pt_read_d
- bytes_transfer_alignment_pt_write_i
- bytes_transfer_alignment_pt_write_d
- bytes_transfer_alignment_piod_read_i
- bytes_transfer_alignment_piod_read_d
- bytes_transfer_alignment_piod_write_i
- bytes_transfer_alignment_piod_write_d
- bytes_transfer_alignment_piod_read_auxv
All tests pass (at least on x86_64).
diffstat:
tests/lib/libc/sys/t_ptrace_wait.c | 195 ++++++++++++++++++++++++++++++++++++-
1 files changed, 193 insertions(+), 2 deletions(-)
diffs (223 lines):
diff -r 15666dce1889 -r 0a661cbb91a9 tests/lib/libc/sys/t_ptrace_wait.c
--- a/tests/lib/libc/sys/t_ptrace_wait.c Thu Mar 28 02:50:27 2019 +0000
+++ b/tests/lib/libc/sys/t_ptrace_wait.c Thu Mar 28 08:13:40 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.100 2019/03/08 23:35:01 kamil Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.101 2019/03/28 08:13:40 kamil Exp $ */
/*-
* Copyright (c) 2016, 2017, 2018, 2019 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.100 2019/03/08 23:35:01 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.101 2019/03/28 08:13:40 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -3667,6 +3667,185 @@
/// ----------------------------------------------------------------------------
+static void
+bytes_transfer_alignment(const char *operation)
+{
+ const int exitval = 5;
+ const int sigval = SIGSTOP;
+ pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+ char *buffer;
+ int vector;
+ size_t len;
+ size_t i;
+ int op;
+
+ struct ptrace_io_desc io;
+ struct ptrace_siginfo info;
+
+ memset(&io, 0, sizeof(io));
+ memset(&info, 0, sizeof(info));
+
+ /* Testing misaligned byte transfer crossing page boundaries */
+ len = sysconf(_SC_PAGESIZE) * 2;
+ buffer = malloc(len);
+ ATF_REQUIRE(buffer != NULL);
+
+ /* Initialize the buffer with random data */
+ for (i = 0; i < len; i++)
+ buffer[i] = i & 0xff;
+
+ DPRINTF("Before forking process PID=%d\n", getpid());
+ SYSCALL_REQUIRE((child = fork()) != -1);
+ if (child == 0) {
+ DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
+ FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
+
+ DPRINTF("Before raising %s from child\n", strsignal(sigval));
+ FORKEE_ASSERT(raise(sigval) == 0);
+
+ DPRINTF("Before exiting of the child process\n");
+ _exit(exitval);
+ }
+ DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child);
+
+ DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_stopped(status, sigval);
+
+ DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for child\n");
+ SYSCALL_REQUIRE(ptrace(PT_GET_SIGINFO, child, &info, sizeof(info))
+ != -1);
+
+ DPRINTF("Signal traced to lwpid=%d\n", info.psi_lwpid);
+ DPRINTF("Signal properties: si_signo=%#x si_code=%#x "
+ "si_errno=%#x\n",
+ info.psi_siginfo.si_signo, info.psi_siginfo.si_code,
+ info.psi_siginfo.si_errno);
+
+ ATF_REQUIRE_EQ(info.psi_siginfo.si_signo, sigval);
+ ATF_REQUIRE_EQ(info.psi_siginfo.si_code, SI_LWP);
+
+ if (strcmp(operation, "PT_READ_I") == 0 ||
+ strcmp(operation, "PT_READ_D") == 0) {
+ if (strcmp(operation, "PT_READ_I"))
+ op = PT_READ_I;
+ else
+ op = PT_READ_D;
+
+ for (i = 0; i <= (len - sizeof(int)); i++) {
+ errno = 0;
+ vector = ptrace(op, child, buffer + i, 0);
+ ATF_REQUIRE_EQ(errno, 0);
+ ATF_REQUIRE(!memcmp(&vector, buffer + i, sizeof(int)));
+ }
+ } else if (strcmp(operation, "PT_WRITE_I") == 0 ||
+ strcmp(operation, "PT_WRITE_D") == 0) {
+ if (strcmp(operation, "PT_WRITE_I"))
+ op = PT_WRITE_I;
+ else
+ op = PT_WRITE_D;
+
+ for (i = 0; i <= (len - sizeof(int)); i++) {
+ memcpy(&vector, buffer + i, sizeof(int));
+ SYSCALL_REQUIRE(ptrace(op, child, buffer + 1, vector)
+ != -1);
+ }
+ } else if (strcmp(operation, "PIOD_READ_I") == 0 ||
+ strcmp(operation, "PIOD_READ_D") == 0) {
+ if (strcmp(operation, "PIOD_READ_I"))
+ op = PIOD_READ_I;
+ else
+ op = PIOD_READ_D;
+
+ io.piod_op = op;
+ io.piod_addr = &vector;
+ io.piod_len = sizeof(int);
+
+ for (i = 0; i <= (len - sizeof(int)); i++) {
+ io.piod_offs = buffer + i;
+
+ SYSCALL_REQUIRE(ptrace(PT_IO, child, &io, sizeof(io))
+ != -1);
+ ATF_REQUIRE(!memcmp(&vector, buffer + i, sizeof(int)));
+ }
+ } else if (strcmp(operation, "PIOD_WRITE_I") == 0 ||
+ strcmp(operation, "PIOD_WRITE_D") == 0) {
+ if (strcmp(operation, "PIOD_WRITE_I"))
+ op = PIOD_WRITE_I;
+ else
+ op = PIOD_WRITE_D;
+
+ io.piod_op = op;
+ io.piod_addr = &vector;
+ io.piod_len = sizeof(int);
+
+ for (i = 0; i <= (len - sizeof(int)); i++) {
+ io.piod_offs = buffer + i;
+
+ SYSCALL_REQUIRE(ptrace(PT_IO, child, &io, sizeof(io))
+ != -1);
+ }
+ } else if (strcmp(operation, "PIOD_READ_AUXV") == 0) {
+ io.piod_op = PIOD_READ_AUXV;
+ io.piod_addr = &vector;
+ io.piod_len = sizeof(int);
+
+ errno = 0;
+ i = 0;
+ /* Read the whole AUXV vector, it has no clear length */
+ while (errno != EIO) {
+ io.piod_offs = (void *)(intptr_t)i;
+ SYSCALL_REQUIRE(ptrace(PT_IO, child, &io, sizeof(io))
+ != -1 || (errno == EIO && i > 0));
+ ++i;
+ }
+ }
+
+ DPRINTF("Before resuming the child process where it left off "
+ "and without signal to be sent\n");
+ SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
+
+ DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0),
+ child);
+
+ DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
+}
+
+#define BYTES_TRANSFER_ALIGNMENT(test, operation) \
+ATF_TC(test); \
+ATF_TC_HEAD(test, tc) \
+{ \
+ atf_tc_set_md_var(tc, "descr", \
+ "Verify bytes transfer for potentially misaligned " \
+ "operation " operation); \
+} \
+ \
+ATF_TC_BODY(test, tc) \
+{ \
+ \
+ bytes_transfer_alignment(operation); \
+}
+
+BYTES_TRANSFER_ALIGNMENT(bytes_transfer_alignment_pt_read_i, "PT_READ_I")
+BYTES_TRANSFER_ALIGNMENT(bytes_transfer_alignment_pt_read_d, "PT_READ_D")
+BYTES_TRANSFER_ALIGNMENT(bytes_transfer_alignment_pt_write_i, "PT_WRITE_I")
+BYTES_TRANSFER_ALIGNMENT(bytes_transfer_alignment_pt_write_d, "PT_WRITE_D")
+
+BYTES_TRANSFER_ALIGNMENT(bytes_transfer_alignment_piod_read_i, "PIOD_READ_I")
+BYTES_TRANSFER_ALIGNMENT(bytes_transfer_alignment_piod_read_d, "PIOD_READ_D")
+BYTES_TRANSFER_ALIGNMENT(bytes_transfer_alignment_piod_write_i, "PIOD_WRITE_I")
+BYTES_TRANSFER_ALIGNMENT(bytes_transfer_alignment_piod_write_d, "PIOD_WRITE_D")
+
+BYTES_TRANSFER_ALIGNMENT(bytes_transfer_alignment_piod_read_auxv, "PIOD_READ_AUXV")
+
+/// ----------------------------------------------------------------------------
+
#if defined(HAVE_GPREGS) || defined(HAVE_FPREGS)
static void
access_regs(const char *regset, const char *aux)
@@ -6370,6 +6549,18 @@
ATF_TP_ADD_TC(tp, bytes_transfer_piod_read_auxv);
+ ATF_TP_ADD_TC(tp, bytes_transfer_alignment_pt_read_i);
+ ATF_TP_ADD_TC(tp, bytes_transfer_alignment_pt_read_d);
+ ATF_TP_ADD_TC(tp, bytes_transfer_alignment_pt_write_i);
+ ATF_TP_ADD_TC(tp, bytes_transfer_alignment_pt_write_d);
+
+ ATF_TP_ADD_TC(tp, bytes_transfer_alignment_piod_read_i);
+ ATF_TP_ADD_TC(tp, bytes_transfer_alignment_piod_read_d);
+ ATF_TP_ADD_TC(tp, bytes_transfer_alignment_piod_write_i);
+ ATF_TP_ADD_TC(tp, bytes_transfer_alignment_piod_write_d);
+
+ ATF_TP_ADD_TC(tp, bytes_transfer_alignment_piod_read_auxv);
+
ATF_TP_ADD_TC_HAVE_GPREGS(tp, access_regs1);
ATF_TP_ADD_TC_HAVE_GPREGS(tp, access_regs2);
ATF_TP_ADD_TC_HAVE_GPREGS(tp, access_regs3);
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