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kernel32/tests: Add tests for committing stack guard pages. 

Signed-off-by: Sebastian Lackner <sebastian@fds-team.de>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Sebastian Lackner 2015-11-28 21:28:48 +01:00 committed by Alexandre Julliard
parent 7b66f9f6b4
commit 0346040889
1 changed files with 76 additions and 0 deletions
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76
dlls/kernel32/tests/virtual.c
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@ -2048,6 +2048,81 @@ static void test_guard_page(void)
VirtualFree( base, 0, MEM_FREE );
}
static DWORD WINAPI stack_commit_func( void *arg )
{
volatile char *p = (char *)&p;
/* trigger all guard pages, to ensure that the pages are committed */
while (p >= (char *)pNtCurrentTeb()->DeallocationStack + 3 * 0x1000)
{
p[0] |= 0;
p -= 0x1000;
}
ok( arg == (void *)0xdeadbeef, "expected 0xdeadbeef, got %p\n", arg );
return 42;
}
static void test_stack_commit(void)
{
static const char code_call_on_stack[] = {
0x55, /* pushl %ebp */
0x56, /* pushl %esi */
0x89, 0xe6, /* movl %esp,%esi */
0x8b, 0x4c, 0x24, 0x0c, /* movl 12(%esp),%ecx - func */
0x8b, 0x54, 0x24, 0x10, /* movl 16(%esp),%edx - arg */
0x8b, 0x44, 0x24, 0x14, /* movl 20(%esp),%eax - stack */
0x83, 0xe0, 0xf0, /* andl $~15,%eax */
0x83, 0xe8, 0x0c, /* subl $12,%eax */
0x89, 0xc4, /* movl %eax,%esp */
0x52, /* pushl %edx */
0x31, 0xed, /* xorl %ebp,%ebp */
0xff, 0xd1, /* call *%ecx */
0x89, 0xf4, /* movl %esi,%esp */
0x5e, /* popl %esi */
0x5d, /* popl %ebp */
0xc2, 0x0c, 0x00 }; /* ret $12 */
DWORD (WINAPI *call_on_stack)( DWORD (WINAPI *func)(void *), void *arg, void *stack );
void *old_stack, *old_stack_base, *old_stack_limit;
void *new_stack, *new_stack_base;
DWORD result;
if (!pNtCurrentTeb)
{
win_skip( "NtCurrentTeb not supported\n" );
return;
}
call_on_stack = VirtualAlloc( 0, 0x1000, MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE );
ok( call_on_stack != NULL, "VirtualAlloc failed %u\n", GetLastError() );
memcpy( call_on_stack, code_call_on_stack, sizeof(code_call_on_stack) );
/* allocate a new stack, only the first guard page is committed */
new_stack = VirtualAlloc( 0, 0x400000, MEM_RESERVE, PAGE_READWRITE );
ok( new_stack != NULL, "VirtualAlloc failed %u\n", GetLastError() );
new_stack_base = (char *)new_stack + 0x400000;
VirtualAlloc( (char *)new_stack_base - 0x1000, 0x1000, MEM_COMMIT, PAGE_READWRITE | PAGE_GUARD );
old_stack = pNtCurrentTeb()->DeallocationStack;
old_stack_base = pNtCurrentTeb()->Tib.StackBase;
old_stack_limit = pNtCurrentTeb()->Tib.StackLimit;
pNtCurrentTeb()->DeallocationStack = new_stack;
pNtCurrentTeb()->Tib.StackBase = new_stack_base;
pNtCurrentTeb()->Tib.StackLimit = new_stack_base;
result = call_on_stack( stack_commit_func, (void *)0xdeadbeef, new_stack_base );
ok( result == 42, "expected 42, got %u\n", result );
pNtCurrentTeb()->DeallocationStack = old_stack;
pNtCurrentTeb()->Tib.StackBase = old_stack_base;
pNtCurrentTeb()->Tib.StackLimit = old_stack_limit;
VirtualFree( new_stack, 0, MEM_FREE );
VirtualFree( call_on_stack, 0, MEM_FREE );
}
DWORD num_execute_fault_calls;
static DWORD execute_fault_seh_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
@ -3772,6 +3847,7 @@ START_TEST(virtual)
test_write_watch();
#ifdef __i386__
test_guard_page();
test_stack_commit();
/* The following tests should be executed as a last step, and in exactly this
* order, since ATL thunk emulation cannot be enabled anymore on Windows. */
test_atl_thunk_emulation( MEM_EXECUTE_OPTION_ENABLE );