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drreg-test.c
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drreg-test.c
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/* **********************************************************
* Copyright (c) 2015-2021 Google, Inc. All rights reserved.
* **********************************************************/
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of Google, Inc. nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE, INC. OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
/* clang-format off */
/* XXX: clang-format incorrectly detected a tab difference at "clang-format on"
* below. This is why "clang-format off" has been moved outside the ifdef until
* bug is fixed.
*/
#ifndef ASM_CODE_ONLY /* C code */
# include "tools.h"
# include "drreg-test-shared.h"
# include <setjmp.h>
/* asm routines */
void
test_asm();
void
test_asm_fault_restore_gpr();
void
test_asm_fault_restore_aflags_in_slot();
void
test_asm_fault_restore_ignore_3rd_dr_tls_slot();
void
test_asm_fault_restore_non_public_dr_slot();
void
test_asm_fault_restore_non_public_dr_slot_rip_rel_addr_in_reg();
void
test_asm_fault_restore_multi_phase_gpr_nested_spill_regions();
void
test_asm_fault_restore_aflags_in_xax();
void
test_asm_fault_restore_gpr_restored_for_read();
void
test_asm_fault_restore_multi_phase_gpr_overlapping_spill_regions();
void
test_asm_fault_restore_gpr_store_xl8();
void
test_asm_fault_restore_faux_gpr_spill();
void
test_asm_fault_restore_multi_phase_native_gpr_spilled_twice();
void
test_asm_fault_restore_multi_phase_aflags_nested_spill_regions();
void
test_asm_fault_restore_multi_phase_aflags_overlapping_spill_regions();
void
test_asm_fault_restore_aflags_restored_for_read();
void
test_asm_fault_restore_multi_phase_native_aflags_spilled_twice();
void
test_asm_fault_restore_aflags_in_slot_store_xl8();
void
test_asm_fault_restore_aflags_in_xax_store_xl8();
void
test_asm_fault_restore_aflags_xax_already_spilled();
void
test_asm_fault_restore_gpr_spilled_to_mcontext_later();
void
test_asm_fault_restore_aflags_spilled_to_mcontext_later();
void
test_asm_fault_restore_gpr_spilled_during_clean_call_later();
void
test_asm_fault_restore_aflags_spilled_during_clean_call_later();
void
test_asm_fault_restore_gpr_spilled_to_mcontext_between();
void
test_asm_fault_restore_aflags_spilled_to_mcontext_between();
void
test_asm_fault_restore_multi_phase_gpr_nested_spill_regions_insertion_outer();
void
test_asm_fault_restore_multi_phase_aflags_nested_spill_regions_insertion_outer();
static SIGJMP_BUF mark;
# if defined(UNIX)
# include <signal.h>
static void
handle_signal_test_asm(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
print("ERROR: did not expect any signal!\n");
SIGLONGJMP(mark, 1);
}
static void
handle_signal_gpr_aflags_in_slot(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_3_C)
print("ERROR: spilled register value was not preserved!\n");
} else if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_ignore_3rd_slot(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_7_C)
print("ERROR: spilled register value was not preserved!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_non_public_slot(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
# ifdef X86
if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->SC_XAX != DRREG_TEST_9_C) {
print("ERROR: spilled register value was not preserved!\n");
exit(1);
}
}
# endif
SIGLONGJMP(mark, 1);
}
static void
handle_signal_non_public_slot_rip_rel(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
# ifdef X86
if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->SC_XAX != DRREG_TEST_11_C) {
print("ERROR: spilled register value was not preserved!\n");
exit(1);
}
}
# endif
SIGLONGJMP(mark, 1);
}
static void
handle_signal_multi_phase_gpr(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_14_C)
print("ERROR: spilled register value was not preserved in test #14!\n");
} else if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_17_C)
print("ERROR: spilled register value was not preserved in test #17!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_aflags_xax_gpr_read(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #15!\n");
} else if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_16_C)
print("ERROR: spilled register value was not preserved in test #16!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_gpr_xl8_faux_gpr_spill(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_18_C)
print("ERROR: spilled register value was not preserved in test #18!\n");
} else if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_19_C)
print("ERROR: spilled register value was not preserved in test #19!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_gpr_multi_spill_aflags_nested(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_20_C)
print("ERROR: spilled register value was not preserved in test #20!\n");
} else if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #21!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_multi_phase_aflags_overlapping(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #23!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_aflags_read(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #24!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_aflags_multi_spill(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #25!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_aflags_xl8(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #26!\n");
} else if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #27!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_aflags_xax_already_spilled(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #29!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_spilled_to_mcontext_later(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_30_C)
print("ERROR: spilled register value was not preserved in test #30!\n");
} else if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #31!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_spilled_during_clean_call_later(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_CLEAN_CALL_MCONTEXT_SIG != DRREG_TEST_32_C)
print("ERROR: spilled register value was not preserved in test #32!\n");
} else if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #33!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_spilled_to_mcontext_between(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_34_C)
print("ERROR: spilled register value was not preserved in test #34!\n");
} else if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #35!\n");
}
SIGLONGJMP(mark, 1);
}
static void
handle_signal_nested_gpr_aflags_spill_insertion_outer(int signal, siginfo_t *siginfo, ucontext_t *ucxt)
{
if (signal == SIGILL) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (sc->TEST_REG_SIG != DRREG_TEST_36_C)
print("ERROR: spilled register value was not preserved in test #36!\n");
} else if (signal == SIGSEGV) {
sigcontext_t *sc = SIGCXT_FROM_UCXT(ucxt);
if (!TESTALL(DRREG_TEST_AFLAGS_C, sc->TEST_FLAGS_SIG))
print("ERROR: spilled flags value was not preserved in test #37!\n");
}
SIGLONGJMP(mark, 1);
}
# elif defined(WINDOWS)
# include <windows.h>
static LONG WINAPI
handle_exception_test_asm(struct _EXCEPTION_POINTERS *ep)
{
print("ERROR: did not expect any signal!\n");
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_gpr_aflags_in_slot(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_3_C)
print("ERROR: spilled register value was not preserved!\n");
} else if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_ignore_3rd_slot(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_7_C)
print("ERROR: spilled register value was not preserved!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_non_public_slot(struct _EXCEPTION_POINTERS *ep)
{
# ifdef X86
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_XAX_CXT != DRREG_TEST_9_C)
print("ERROR: spilled register value was not preserved!\n");
}
# endif
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_non_public_slot_rip_rel(struct _EXCEPTION_POINTERS *ep)
{
# ifdef X86
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_XAX_CXT != DRREG_TEST_11_C)
print("ERROR: spilled register value was not preserved!\n");
}
# endif
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_multi_phase_gpr(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_14_C)
print("ERROR: spilled register value was not preserved!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_aflags_xax_gpr_read(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #15!\n");
}
else if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_16_C)
print("ERROR: spilled register value was not preserved in test #16!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_gpr_xl8_faux_gpr_spill(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_18_C)
print("ERROR: spilled register value was not preserved in test #18!\n");
} else if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_19_C)
print("ERROR: spilled register value was not preserved in test #19!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_gpr_multi_spill_aflags_nested(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_20_C)
print("ERROR: spilled register value was not preserved in test #20!\n");
} else if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #21!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_multi_phase_aflags_overlapping(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #23!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_aflags_read(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #24!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_aflags_multi_spill(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #25!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_aflags_xl8(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #26!\n");
} else if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #27!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_aflags_xax_already_spilled(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #29!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_spilled_to_mcontext_later(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_30_C)
print("ERROR: spilled register value was not preserved in test #30!\n");
} else if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #31!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_spilled_during_clean_call_later(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_REG_CLEAN_CALL_MCONTEXT_CXT != DRREG_TEST_32_C)
print("ERROR: spilled register value was not preserved in test #32!\n");
} else if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #33!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_spilled_to_mcontext_between(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_34_C)
print("ERROR: spilled register value was not preserved in test #34!\n");
} else if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #35!\n");
}
SIGLONGJMP(mark, 1);
}
static LONG WINAPI
handle_exception_nested_gpr_aflags_spill_insertion_outer(struct _EXCEPTION_POINTERS *ep)
{
if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) {
if (ep->ContextRecord->TEST_REG_CXT != DRREG_TEST_36_C)
print("ERROR: spilled register value was not preserved in test #36!\n");
} else if (ep->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
if (!TESTALL(DRREG_TEST_AFLAGS_C, ep->ContextRecord->CXT_XFLAGS))
print("ERROR: spilled flags value was not preserved in test #37!\n");
}
SIGLONGJMP(mark, 1);
}
# endif
int
main(int argc, const char *argv[])
{
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_test_asm, false);
intercept_signal(SIGILL, (handler_3_t)&handle_signal_test_asm, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_test_asm);
# endif
print("drreg-test running\n");
if (SIGSETJMP(mark) == 0) {
test_asm();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_gpr_aflags_in_slot, false);
intercept_signal(SIGILL, (handler_3_t)&handle_signal_gpr_aflags_in_slot, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_gpr_aflags_in_slot);
# endif
/* Test fault reg restore */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_gpr();
}
/* Test fault aflags restore */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_aflags_in_slot();
}
# if defined(UNIX)
intercept_signal(SIGILL, (handler_3_t)&handle_signal_ignore_3rd_slot, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_ignore_3rd_slot);
# endif
/* Test fault check ignore 3rd DR TLS slot */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_ignore_3rd_dr_tls_slot();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_non_public_slot, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_non_public_slot);
# endif
/* Test fault restore of non-public DR slot used by mangling.
* Making sure drreg ignores restoring this slot.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_non_public_dr_slot();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_non_public_slot_rip_rel, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_non_public_slot_rip_rel);
# endif
/* Test 10: test fault restore of non-public DR slot used by mangling,
* when rip-rel address is forced to be in register. Making sure drreg
* ignores restoring this slot. Exposes transparency limitation of DR
* if reg is optimized to be app's dead reg.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_non_public_dr_slot_rip_rel_addr_in_reg();
}
# if defined(UNIX)
intercept_signal(SIGILL, (handler_3_t)&handle_signal_multi_phase_gpr, false);
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_multi_phase_gpr, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_multi_phase_gpr);
# endif
/* Test restore on fault for aflags reserved in multiple phases, with
* nested spill regions, and the app2app phase spill being the outer one.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_multi_phase_gpr_nested_spill_regions();
}
/* Test fault reg restore for multi-phase non-nested overlapping reservations. */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_multi_phase_gpr_overlapping_spill_regions();
}
# if defined(UNIX)
intercept_signal(SIGILL, (handler_3_t)&handle_signal_aflags_xax_gpr_read, false);
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_aflags_xax_gpr_read, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_aflags_xax_gpr_read);
# endif
/* Test fault aflags restore from xax. */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_aflags_in_xax();
}
/* Test fault gpr restore on fault when it has been restored before for an
* app read.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_gpr_restored_for_read();
}
# if defined(UNIX)
intercept_signal(SIGILL, (handler_3_t)&handle_signal_gpr_xl8_faux_gpr_spill, false);
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_gpr_xl8_faux_gpr_spill, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_gpr_xl8_faux_gpr_spill);
# endif
/* Test fault reg restore for fragments emitting DR_EMIT_STORE_TRANSLATIONS */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_gpr_store_xl8();
}
/* Test fault reg restore for fragments with a faux spill instr. */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_faux_gpr_spill();
}
# if defined(UNIX)
intercept_signal(SIGILL, (handler_3_t)&handle_signal_gpr_multi_spill_aflags_nested, false);
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_gpr_multi_spill_aflags_nested, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_gpr_multi_spill_aflags_nested);
# endif
/* Test fault reg restore for multi-phase nested reservation where
* the first phase doesn't write the reg before the second
* reservation.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_multi_phase_native_gpr_spilled_twice();
}
/* XXX i#4849: For some aflags restore tests below we do not use SIGILL to
* raise the fault. This is because the undefined instr on AArchXX is assumed
* to read aflags, and therefore restores aflags automatically. So the
* restore logic doesn't come into play.
*/
/* Test restore on fault for aflags reserved in multiple phases, with
* nested spill regions, and the app2app phase spill being the outer one.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_multi_phase_aflags_nested_spill_regions();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_multi_phase_aflags_overlapping, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_multi_phase_aflags_overlapping);
# endif
/* Test restore on fault for aflags reserved in multiple phases
* with overlapping but not nested spill regions.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_multi_phase_aflags_overlapping_spill_regions();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_aflags_read, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_aflags_read);
# endif
/* Test restore on fault for aflags restored once (for app read)
* before crash.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_aflags_restored_for_read();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_aflags_multi_spill, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_aflags_multi_spill);
# endif
/* Test restore on fault for aflags when native aflags are spilled
* to multiple slots initially.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_multi_phase_native_aflags_spilled_twice();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_aflags_xl8, false);
intercept_signal(SIGILL, (handler_3_t)&handle_signal_aflags_xl8, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_aflags_xl8);
# endif
/* Test restore on fault for aflags spilled to slot for fragment
* emitting DR_EMIT_STORE_TRANSLATIONS.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_aflags_in_slot_store_xl8();
}
/* Test restore on fault for aflags spilled to xax for fragment
* emitting DR_EMIT_STORE_TRANSLATIONS.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_aflags_in_xax_store_xl8();
}
# if defined(UNIX)
intercept_signal(SIGILL, (handler_3_t)&handle_signal_aflags_xax_already_spilled, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_aflags_xax_already_spilled);
# endif
/* Test restore on fault for aflags stored in slot, when xax was
* already spilled and in-use by instrumentation. This is to
* verify that aflags are spilled using xax only.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_aflags_xax_already_spilled();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_spilled_to_mcontext_later, false);
intercept_signal(SIGILL, (handler_3_t)&handle_signal_spilled_to_mcontext_later, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_spilled_to_mcontext_later);
# endif
/* Test restore on fault for gpr spilled to mcontext later by non-drreg routines. */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_gpr_spilled_to_mcontext_later();
}
/* Test restore on fault for aflags spilled to mcontext later by non-drreg routines. */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_aflags_spilled_to_mcontext_later();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_spilled_during_clean_call_later, false);
intercept_signal(SIGILL, (handler_3_t)&handle_signal_spilled_during_clean_call_later, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_spilled_during_clean_call_later);
# endif
/* Test restore on fault for gpr spilled during clean call instrumentation later. */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_gpr_spilled_during_clean_call_later();
}
/* Test restore on fault for aflags spilled during clean call instrumentation later. */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_aflags_spilled_during_clean_call_later();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_spilled_to_mcontext_between, false);
intercept_signal(SIGILL, (handler_3_t)&handle_signal_spilled_to_mcontext_between, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_spilled_to_mcontext_between);
# endif
/* Test restore on fault for gpr spilled to mcontext in between its drreg spill region. */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_gpr_spilled_to_mcontext_between();
}
/* Test restore on fault for aflags spilled to mcontext in between its drreg spill region. */
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_aflags_spilled_to_mcontext_between();
}
# if defined(UNIX)
intercept_signal(SIGSEGV, (handler_3_t)&handle_signal_nested_gpr_aflags_spill_insertion_outer, false);
intercept_signal(SIGILL, (handler_3_t)&handle_signal_nested_gpr_aflags_spill_insertion_outer, false);
# elif defined(WINDOWS)
SetUnhandledExceptionFilter(&handle_exception_nested_gpr_aflags_spill_insertion_outer);
# endif
/* Test restore on fault for gpr reserved in multiple phases, with
* nested spill regions, and the insertion phase spill being the outer one.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_multi_phase_gpr_nested_spill_regions_insertion_outer();
}
/* Test restore on fault for aflags reserved in multiple phases, with
* nested spill regions, and the insertion phase spill being the outer one.
*/
if (SIGSETJMP(mark) == 0) {
test_asm_fault_restore_multi_phase_aflags_nested_spill_regions_insertion_outer();
}
/* XXX i#511: add more fault tests and other tricky corner cases */
print("drreg-test finished\n");
return 0;
}
#else /* asm code *************************************************************/
# include "asm_defines.asm"
# include "drreg-test-shared.h"
START_FILE
#ifdef X64
# define FRAME_PADDING 0
#else
# define FRAME_PADDING 0
#endif
#define FUNCNAME test_asm
DECLARE_FUNC_SEH(FUNCNAME)
GLOBAL_LABEL(FUNCNAME:)
#ifdef X86
PUSH_CALLEE_SAVED_REGS()
sub REG_XSP, FRAME_PADDING /* align */
END_PROLOG
jmp test1
/* Test 1: separate write and read of reserved reg */
test1:
mov TEST_REG_ASM, DRREG_TEST_1_ASM
mov TEST_REG_ASM, DRREG_TEST_1_ASM
mov TEST_REG_ASM, REG_XSP
mov REG_XBX, PTRSZ [TEST_REG_ASM]
jmp test2_init
test2_init:
/* Initializing register for additional test on top of this one, see
* instru2instru.
*/
mov TEST_REG2_ASM, MAKE_HEX_ASM(0)
jmp test2
test2:
/* Test 2: same instr writes and reads reserved reg */
mov TEST_REG_ASM, DRREG_TEST_2_ASM
mov TEST_REG_ASM, DRREG_TEST_2_ASM
mov TEST_REG_ASM, REG_XSP
mov PTRSZ [TEST_REG_ASM - 8], TEST_REG_ASM
mov TEST_REG_ASM, PTRSZ [TEST_REG_ASM - 8]
/* Test accessing the reg again to ensure the app spill slot and tool value
* are handled in the proper order:
*/
mov TEST_REG_ASM, PTRSZ [TEST_REG_ASM]
jmp test4
/* Test 4: read and write of reserved aflags */
test4:
mov TEST_REG_ASM, DRREG_TEST_4_ASM
mov TEST_REG_ASM, DRREG_TEST_4_ASM
setne TEST_REG_ASM_LSB
cmp TEST_REG_ASM, REG_XSP
jmp test11
/* Store aflags to dead XAX, and restore when XAX is live */
test11:
mov TEST_REG_ASM, DRREG_TEST_11_ASM
mov TEST_REG_ASM, DRREG_TEST_11_ASM
cmp TEST_REG_ASM, TEST_REG_ASM
push TEST_11_CONST
pop REG_XAX
mov REG_XAX, TEST_REG_ASM
mov TEST_REG_ASM, REG_XAX
je test11_done
/* Null deref if we have incorrect eflags */
xor TEST_REG_ASM, TEST_REG_ASM
mov PTRSZ [TEST_REG_ASM], TEST_REG_ASM
jmp test11_done
test11_done:
jmp test12
/* Test 12: drreg_statelessly_restore_app_value */
test12:
mov TEST_REG_ASM, DRREG_TEST_12_ASM
mov TEST_REG_ASM, DRREG_TEST_12_ASM
mov REG_XAX, TEST_12_CONST
cmp REG_XAX, TEST_12_CONST
je test12_done
/* Null deref if we have incorrect eflags */
xor TEST_REG_ASM, TEST_REG_ASM
mov PTRSZ [TEST_REG_ASM], TEST_REG_ASM
jmp test12_done
test12_done:
jmp test13
/* Test 13: Multi-phase reg spill slot conflicts. */
test13:
mov TEST_REG_ASM, DRREG_TEST_13_ASM
mov TEST_REG_ASM, DRREG_TEST_13_ASM
/* app2app phase will reserve TEST_REG_ASM here. */
mov TEST_REG2_ASM, TEST_INSTRUMENTATION_MARKER_1
/* insertion phase will reserve TEST_REG_ASM here. */
mov TEST_REG2_ASM, TEST_INSTRUMENTATION_MARKER_2
/* insertion phase will unreserve TEST_REG_ASM here. */
mov TEST_REG2_ASM, TEST_INSTRUMENTATION_MARKER_3
/* app2app phase will unreserve TEST_REG_ASM here. */
jmp test13_done
test13_done:
/* Fail if reg was not restored correctly. */
cmp TEST_REG_ASM, DRREG_TEST_13_ASM
je test22
ud2
/* Test 22: Multi-phase aflags spill slot conflicts. */
test22:
mov TEST_REG_ASM, DRREG_TEST_22_ASM
mov TEST_REG_ASM, DRREG_TEST_22_ASM
/* Set overflow bit. */
mov al, 100
add al, 100
/* Set other aflags. */
mov ah, DRREG_TEST_AFLAGS_ASM
sahf
/* app2app phase will reserve aflags here. */
mov TEST_REG2_ASM, TEST_INSTRUMENTATION_MARKER_1
/* insertion phase will reserve aflags here. */
mov TEST_REG2_ASM, TEST_INSTRUMENTATION_MARKER_2
/* insertion phase will unreserve aflags here. */
mov TEST_REG2_ASM, TEST_INSTRUMENTATION_MARKER_3
/* app2app phase will unreserve aflags here. */
jmp test22_done
test22_done:
/* Fail if aflags were not restored correctly. */
lahf
seto al
cmp ah, DRREG_TEST_AFLAGS_ASM
jne test22_fail
cmp al, 1
jne test22_fail
jmp test28
test22_fail:
ud2
/* Unreachable, but we want this bb to end here. */
jmp test28
/* Test 28: Aflags spilled to xax, and xax statelessly restored. */
test28: