Module: wine Branch: master Commit: 03460408894899b7cb073c8d7e4d7b3a130d7d5f URL: http://source.winehq.org/git/wine.git/?a=commit;h=03460408894899b7cb073c8d7e...
Author: Sebastian Lackner sebastian@fds-team.de Date: Sat Nov 28 21:28:48 2015 +0100
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
---
dlls/kernel32/tests/virtual.c | 76 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+)
diff --git a/dlls/kernel32/tests/virtual.c b/dlls/kernel32/tests/virtual.c index e80ba38..e614bde 100644 --- a/dlls/kernel32/tests/virtual.c +++ b/dlls/kernel32/tests/virtual.c @@ -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 );