Signed-off-by: Paul Gofman pgofman@codeweavers.com --- v4: - added patch.
dlls/ntdll/exception.c | 12 ++++++++++++ dlls/ntdll/ntdll_misc.h | 2 ++ dlls/ntdll/signal_arm.c | 4 ++-- dlls/ntdll/signal_arm64.c | 4 ++-- dlls/ntdll/signal_i386.c | 6 ++++-- dlls/ntdll/signal_x86_64.c | 10 ++++++---- 6 files changed, 28 insertions(+), 10 deletions(-)
diff --git a/dlls/ntdll/exception.c b/dlls/ntdll/exception.c index c3714e8369b..02bf672f8fb 100644 --- a/dlls/ntdll/exception.c +++ b/dlls/ntdll/exception.c @@ -1065,3 +1065,15 @@ NTSTATUS WINAPI RtlCopyExtendedContext( CONTEXT_EX *dst, ULONG context_flags, CO memcpy( &dst_xs->YmmContext, &src_xs->YmmContext, sizeof(dst_xs->YmmContext) ); return STATUS_SUCCESS; } + + +/************************************************************************* + * RtlCaptureStackBackTrace (NTDLL.@) + */ +USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) +{ + ULONG ret; + + ret = capture_stack_back_trace( skip, count, buffer, hash ); + return min( ret, ~(USHORT)0 ); +} diff --git a/dlls/ntdll/ntdll_misc.h b/dlls/ntdll/ntdll_misc.h index 34af6b780cf..31a33b04dbf 100644 --- a/dlls/ntdll/ntdll_misc.h +++ b/dlls/ntdll/ntdll_misc.h @@ -57,6 +57,8 @@ extern void WINAPI KiUserCallbackDispatcher(ULONG,void*,ULONG) DECLSPEC_HIDDEN; extern RUNTIME_FUNCTION *lookup_function_info( ULONG_PTR pc, ULONG_PTR *base, LDR_DATA_TABLE_ENTRY **module ) DECLSPEC_HIDDEN; #endif
+extern ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) DECLSPEC_HIDDEN; + /* debug helpers */ extern LPCSTR debugstr_us( const UNICODE_STRING *str ) DECLSPEC_HIDDEN; extern const char *debugstr_exception_code( DWORD code ) DECLSPEC_HIDDEN; diff --git a/dlls/ntdll/signal_arm.c b/dlls/ntdll/signal_arm.c index 0ef210a0331..241ddc3ce70 100644 --- a/dlls/ntdll/signal_arm.c +++ b/dlls/ntdll/signal_arm.c @@ -300,9 +300,9 @@ __ASM_STDCALL_FUNC( RtlRaiseException, 4, "bl " __ASM_NAME("RtlRaiseStatus") )
/************************************************************************* - * RtlCaptureStackBackTrace (NTDLL.@) + * capture_stack_back_trace */ -USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) +ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) { FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash ); return 0; diff --git a/dlls/ntdll/signal_arm64.c b/dlls/ntdll/signal_arm64.c index 290639b676b..1bffbe7efe9 100644 --- a/dlls/ntdll/signal_arm64.c +++ b/dlls/ntdll/signal_arm64.c @@ -1473,9 +1473,9 @@ __ASM_STDCALL_FUNC( RtlRaiseException, 4, "bl " __ASM_NAME("RtlRaiseStatus") /* does not return */ );
/************************************************************************* - * RtlCaptureStackBackTrace (NTDLL.@) + * capture_stack_back_trace */ -USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) +ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) { FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash ); return 0; diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c index 14971032ce6..26150ce877b 100644 --- a/dlls/ntdll/signal_i386.c +++ b/dlls/ntdll/signal_i386.c @@ -481,14 +481,16 @@ __ASM_STDCALL_FUNC( RtlRaiseException, 4,
/************************************************************************* - * RtlCaptureStackBackTrace (NTDLL.@) + * capture_stack_back_trace */ -USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) +ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) { CONTEXT context; ULONG i; ULONG *frame;
+ ++skip; + RtlCaptureContext( &context ); if (hash) *hash = 0; frame = (ULONG *)context.Ebp; diff --git a/dlls/ntdll/signal_x86_64.c b/dlls/ntdll/signal_x86_64.c index ef32eba68b7..5f3c8f70208 100644 --- a/dlls/ntdll/signal_x86_64.c +++ b/dlls/ntdll/signal_x86_64.c @@ -1490,19 +1490,21 @@ static inline ULONG hash_pointers( void **ptrs, ULONG count )
/************************************************************************* - * RtlCaptureStackBackTrace (NTDLL.@) + * capture_stack_back_trace */ -USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) +ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) { UNWIND_HISTORY_TABLE table; DISPATCHER_CONTEXT dispatch; CONTEXT context; NTSTATUS status; ULONG i; - USHORT num_entries = 0; + ULONG num_entries = 0;
TRACE( "(%u, %u, %p, %p)\n", skip, count, buffer, hash );
+ ++skip; + RtlCaptureContext( &context ); dispatch.TargetIp = 0; dispatch.ContextRecord = &context; @@ -1529,7 +1531,7 @@ USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, if (i >= skip) buffer[num_entries++] = (void *)context.Rip; } if (hash && num_entries > 0) *hash = hash_pointers( buffer, num_entries ); - TRACE( "captured %hu frames\n", num_entries ); + TRACE( "captured %u frames\n", num_entries ); return num_entries; }
Signed-off-by: Paul Gofman pgofman@codeweavers.com --- v4: - use helper common with RtlCaptureStackBackTrace() and avoid using temporary buffer.
dlls/ntdll/exception.c | 24 ++++++++- dlls/ntdll/ntdll.spec | 2 +- dlls/ntdll/signal_i386.c | 17 +++--- dlls/ntdll/signal_x86_64.c | 7 +-- dlls/ntdll/tests/exception.c | 83 +++++++++++++++++++++++++++++ dlls/ntoskrnl.exe/ntoskrnl.exe.spec | 2 +- include/ddk/ntddk.h | 3 ++ include/winnt.h | 2 + 8 files changed, 124 insertions(+), 16 deletions(-)
diff --git a/dlls/ntdll/exception.c b/dlls/ntdll/exception.c index 02bf672f8fb..ea0d0df6694 100644 --- a/dlls/ntdll/exception.c +++ b/dlls/ntdll/exception.c @@ -30,6 +30,7 @@ #define WIN32_NO_STATUS #include "windef.h" #include "winternl.h" +#include "ddk/ntddk.h" #include "ddk/wdm.h" #include "wine/exception.h" #include "wine/list.h" @@ -1074,6 +1075,25 @@ USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, { ULONG ret;
- ret = capture_stack_back_trace( skip, count, buffer, hash ); - return min( ret, ~(USHORT)0 ); + ret = capture_stack_back_trace( skip, skip + count, buffer, hash ); + if (ret < skip) return 0; + return min( ret - skip, ~(USHORT)0 ); +} + + +/********************************************************************** + * RtlWalkFrameChain (NTDLL.@) + */ +ULONG WINAPI RtlWalkFrameChain( void **callers, ULONG count, ULONG skip ) +{ + TRACE( "callers %p, count %u, skip %#x.\n", callers, count, skip ); + + if (skip & ~(0xff << RTL_STACK_WALKING_MODE_FRAMES_TO_SKIP_SHIFT)) + { + WARN( "Invalid flags %#x.\n", skip ); + return 0; + } + skip >>= RTL_STACK_WALKING_MODE_FRAMES_TO_SKIP_SHIFT; + + return capture_stack_back_trace( skip, count, callers, NULL ); } diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec index 13e65f65139..c54b2e205aa 100644 --- a/dlls/ntdll/ntdll.spec +++ b/dlls/ntdll/ntdll.spec @@ -1073,7 +1073,7 @@ @ stdcall RtlWakeAddressSingle(ptr) @ stdcall RtlWakeAllConditionVariable(ptr) @ stdcall RtlWakeConditionVariable(ptr) -@ stub RtlWalkFrameChain +@ stdcall RtlWalkFrameChain(ptr long long) @ stdcall RtlWalkHeap(long ptr) @ stdcall RtlWow64EnableFsRedirection(long) @ stdcall RtlWow64EnableFsRedirectionEx(long ptr) diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c index 26150ce877b..ff3e837c784 100644 --- a/dlls/ntdll/signal_i386.c +++ b/dlls/ntdll/signal_i386.c @@ -488,27 +488,26 @@ ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, U CONTEXT context; ULONG i; ULONG *frame; + ULONG num_entries = 0;
++skip; + ++count;
RtlCaptureContext( &context ); if (hash) *hash = 0; frame = (ULONG *)context.Ebp;
- while (skip--) - { - if (!is_valid_frame( frame )) return 0; - frame = (ULONG *)*frame; - } - for (i = 0; i < count; i++) { if (!is_valid_frame( frame )) break; - buffer[i] = (void *)frame[1]; - if (hash) *hash += frame[1]; + if (i >= skip) + { + buffer[num_entries++] = (void *)frame[1]; + if (hash) *hash += frame[1]; + } frame = (ULONG *)*frame; } - return i; + return i ? i - 1 : 0; }
diff --git a/dlls/ntdll/signal_x86_64.c b/dlls/ntdll/signal_x86_64.c index 5f3c8f70208..4a9c7d4b9ff 100644 --- a/dlls/ntdll/signal_x86_64.c +++ b/dlls/ntdll/signal_x86_64.c @@ -1504,16 +1504,17 @@ ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, U TRACE( "(%u, %u, %p, %p)\n", skip, count, buffer, hash );
++skip; + ++count;
RtlCaptureContext( &context ); dispatch.TargetIp = 0; dispatch.ContextRecord = &context; dispatch.HistoryTable = &table; if (hash) *hash = 0; - for (i = 0; i < skip + count; i++) + for (i = 0; i < count; i++) { status = virtual_unwind( UNW_FLAG_NHANDLER, &dispatch, &context ); - if (status != STATUS_SUCCESS) return i; + if (status != STATUS_SUCCESS) break;
if (!dispatch.EstablisherFrame) break;
@@ -1532,7 +1533,7 @@ ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, U } if (hash && num_entries > 0) *hash = hash_pointers( buffer, num_entries ); TRACE( "captured %u frames\n", num_entries ); - return num_entries; + return i ? i - 1 : 0; }
diff --git a/dlls/ntdll/tests/exception.c b/dlls/ntdll/tests/exception.c index 6af68317732..d73e75ee529 100644 --- a/dlls/ntdll/tests/exception.c +++ b/dlls/ntdll/tests/exception.c @@ -28,6 +28,7 @@ #include "winnt.h" #include "winreg.h" #include "winternl.h" +#include "ddk/ntddk.h" #include "ddk/wdm.h" #include "excpt.h" #include "wine/test.h" @@ -9113,6 +9114,87 @@ static void test_copy_context(void) } #endif
+static void test_walk_stack(void) +{ + ULONG count, expected, frame_count, requested_count, skip_count; + void *addrs[256], *addrs2[256]; + void *start, *end; + unsigned int i, j; + + memset(addrs, 0xcc, sizeof(addrs)); + memset(addrs2, 0xcc, sizeof(addrs2)); + + frame_count = RtlCaptureStackBackTrace(0, ARRAY_SIZE(addrs), addrs, NULL); + count = RtlWalkFrameChain(addrs2, ARRAY_SIZE(addrs2), 0); + + trace("frame_count %u.\n", frame_count); + + ok(frame_count > 1, "Got zero frame_count.\n"); + ok(count == frame_count, "Got unexpected frame_count %u, count %u.\n", frame_count, count); + + start = test_walk_stack; + end = (BYTE *)start + 0x1000; + todo_wine_if(sizeof(void *) == 4) + ok(addrs[0] >= start && addrs[0] < end, "Address is not inside test function, start %p, end %p, addr %p.\n", + start, end, addrs[0]); + todo_wine_if(sizeof(void *) == 4) + ok(addrs2[0] >= start && addrs2[0] < end, "Address is not inside test function, start %p, end %p, addr %p.\n", + start, end, addrs2[0]); + + for (i = 1; i < frame_count; ++i) + { + ok(addrs[i] == addrs2[i], "i %u, addresses do not match, %p vs %p.\n", i, addrs[i], addrs2[i]); + } + todo_wine ok(!!addrs[frame_count - 1], "Expected non-NULL last address.\n"); + + for (requested_count = frame_count - 1; requested_count < frame_count + 1; ++requested_count) + { + for (i = 0; i < 32; ++i) + { + winetest_push_context("requested_count %u, i %u", requested_count, i); + skip_count = (1 << i) >> 8; + + if (i < RTL_STACK_WALKING_MODE_FRAMES_TO_SKIP_SHIFT + || i >= RTL_STACK_WALKING_MODE_FRAMES_TO_SKIP_SHIFT + 8) + expected = 0; + else + expected = min(frame_count, requested_count); + + memset(addrs2, 0xcc, sizeof(addrs2)); + count = RtlWalkFrameChain(addrs2, requested_count, 1 << i); + ok(count == expected, "Got unexpected frame_count %u, expected %u.\n", count, expected); + + if (skip_count < count) + count -= skip_count; + else + count = 0; + + for (j = 0; j < count; ++j) + ok( addrs2[j] != (void *)(ULONG_PTR)0xcccccccccccccccc, "Address is not set, j %u.\n", j ); + for (; j < ARRAY_SIZE(addrs2); ++j) + ok( addrs2[j] == (void *)(ULONG_PTR)0xcccccccccccccccc, "Address is set, j %u.\n", j ); + + if (!count) + { + winetest_pop_context(); + continue; + } + + memset(addrs, 0xcc, sizeof(addrs)); + expected = skip_count > frame_count ? 0 : min(frame_count - skip_count, requested_count); + count = RtlCaptureStackBackTrace(skip_count, requested_count, addrs, NULL); + ok(count == expected, "Got unexpected frame_count %u, expected %u. i %u.\n", count, expected, i); + + count = min(frame_count, requested_count) - skip_count; + for (j = 0; j < count; ++j) + { + ok(addrs[j] == addrs2[j], "Addresses do not match, j %u, %p, %p.\n", j, addrs[j], addrs2[j]); + } + winetest_pop_context(); + } + } +} + START_TEST(exception) { HMODULE hntdll = GetModuleHandleA("ntdll.dll"); @@ -9339,5 +9421,6 @@ START_TEST(exception) test_suspend_thread(); test_suspend_process(); test_unload_trace(); + test_walk_stack(); VirtualFree(code_mem, 0, MEM_RELEASE); } diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec index 0208e2f633f..b94e58ccb26 100644 --- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec +++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec @@ -1300,7 +1300,7 @@ @ stdcall RtlVerifyVersionInfo(ptr long int64) @ stdcall -arch=arm64,x86_64 RtlVirtualUnwind(long long long ptr ptr ptr ptr ptr) @ stub RtlVolumeDeviceToDosName -@ stub RtlWalkFrameChain +@ stdcall RtlWalkFrameChain(ptr long long) @ stdcall RtlWriteRegistryValue(long ptr ptr long ptr long) @ stub RtlZeroHeap @ stdcall RtlZeroMemory(ptr long) diff --git a/include/ddk/ntddk.h b/include/ddk/ntddk.h index 41ad3d721bd..ce558139aa6 100644 --- a/include/ddk/ntddk.h +++ b/include/ddk/ntddk.h @@ -245,6 +245,8 @@ typedef EXPAND_STACK_CALLOUT *PEXPAND_STACK_CALLOUT; typedef GUID UUID; #endif
+#define RTL_STACK_WALKING_MODE_FRAMES_TO_SKIP_SHIFT 8 + NTSTATUS WINAPI ExUuidCreate(UUID*); NTSTATUS WINAPI IoQueryDeviceDescription(PINTERFACE_TYPE,PULONG,PCONFIGURATION_TYPE,PULONG, PCONFIGURATION_TYPE,PULONG,PIO_QUERY_DEVICE_ROUTINE,PVOID); @@ -267,5 +269,6 @@ NTSTATUS WINAPI PsSetCreateThreadNotifyRoutine(PCREATE_THREAD_NOTIFY_ROUTINE); NTSTATUS WINAPI PsSetLoadImageNotifyRoutine(PLOAD_IMAGE_NOTIFY_ROUTINE); void WINAPI RtlInitializeGenericTableAvl(PRTL_AVL_TABLE,PRTL_AVL_COMPARE_ROUTINE,PRTL_AVL_ALLOCATE_ROUTINE, PRTL_AVL_FREE_ROUTINE,void *); void WINAPI RtlInsertElementGenericTableAvl(PRTL_AVL_TABLE,void *,ULONG,BOOL*); +ULONG WINAPI RtlWalkFrameChain(void **,ULONG,ULONG);
#endif diff --git a/include/winnt.h b/include/winnt.h index ef731e29c52..eb1bd165720 100644 --- a/include/winnt.h +++ b/include/winnt.h @@ -1840,6 +1840,8 @@ NTSYSAPI PVOID WINAPI RtlVirtualUnwind(DWORD,ULONG_PTR,ULONG_PTR,RUNTIME_FUNCT
#endif
+NTSYSAPI USHORT WINAPI RtlCaptureStackBackTrace(ULONG,ULONG,void **,ULONG *); + /* * Product types */
Hi,
On 01/11/21 12:13, Paul Gofman wrote:
- for (requested_count = frame_count - 1; requested_count < frame_count + 1; ++requested_count)
- {
for (i = 0; i < 32; ++i){winetest_push_context("requested_count %u, i %u", requested_count, i);skip_count = (1 << i) >> 8;if (i < RTL_STACK_WALKING_MODE_FRAMES_TO_SKIP_SHIFT|| i >= RTL_STACK_WALKING_MODE_FRAMES_TO_SKIP_SHIFT + 8)expected = 0;elseexpected = min(frame_count, requested_count);
Notice that requested_count is either frame_count or frame_count - 1, so that min() always returns requested_count. Not sure if you also meant to test requested_count == frame_count + 1 and got on off by one.
Giovanni.
Signed-off-by: Paul Gofman pgofman@codeweavers.com --- v4: - now when extra frame is provided by the helper no need in asm wrapper.
dlls/ntdll/signal_i386.c | 5 +---- dlls/ntdll/tests/exception.c | 2 -- 2 files changed, 1 insertion(+), 6 deletions(-)
diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c index ff3e837c784..b28684839b7 100644 --- a/dlls/ntdll/signal_i386.c +++ b/dlls/ntdll/signal_i386.c @@ -490,9 +490,6 @@ ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, U ULONG *frame; ULONG num_entries = 0;
- ++skip; - ++count; - RtlCaptureContext( &context ); if (hash) *hash = 0; frame = (ULONG *)context.Ebp; @@ -507,7 +504,7 @@ ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, U } frame = (ULONG *)*frame; } - return i ? i - 1 : 0; + return i; }
diff --git a/dlls/ntdll/tests/exception.c b/dlls/ntdll/tests/exception.c index d73e75ee529..121fbedc72e 100644 --- a/dlls/ntdll/tests/exception.c +++ b/dlls/ntdll/tests/exception.c @@ -9134,10 +9134,8 @@ static void test_walk_stack(void)
start = test_walk_stack; end = (BYTE *)start + 0x1000; - todo_wine_if(sizeof(void *) == 4) ok(addrs[0] >= start && addrs[0] < end, "Address is not inside test function, start %p, end %p, addr %p.\n", start, end, addrs[0]); - todo_wine_if(sizeof(void *) == 4) ok(addrs2[0] >= start && addrs2[0] < end, "Address is not inside test function, start %p, end %p, addr %p.\n", start, end, addrs2[0]);
Signed-off-by: Paul Gofman pgofman@codeweavers.com --- dlls/ntdll/signal_i386.c | 2 +- dlls/ntdll/signal_x86_64.c | 2 +- dlls/ntdll/tests/exception.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c index b28684839b7..5613af4bce0 100644 --- a/dlls/ntdll/signal_i386.c +++ b/dlls/ntdll/signal_i386.c @@ -496,7 +496,7 @@ ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, U
for (i = 0; i < count; i++) { - if (!is_valid_frame( frame )) break; + if (!is_valid_frame( frame ) || !frame[1]) break; if (i >= skip) { buffer[num_entries++] = (void *)frame[1]; diff --git a/dlls/ntdll/signal_x86_64.c b/dlls/ntdll/signal_x86_64.c index 4a9c7d4b9ff..0b6bbc09ed0 100644 --- a/dlls/ntdll/signal_x86_64.c +++ b/dlls/ntdll/signal_x86_64.c @@ -1516,7 +1516,7 @@ ULONG WINAPI capture_stack_back_trace( ULONG skip, ULONG count, PVOID *buffer, U status = virtual_unwind( UNW_FLAG_NHANDLER, &dispatch, &context ); if (status != STATUS_SUCCESS) break;
- if (!dispatch.EstablisherFrame) break; + if (!dispatch.EstablisherFrame || !context.Rip) break;
if ((dispatch.EstablisherFrame & 7) || dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit || diff --git a/dlls/ntdll/tests/exception.c b/dlls/ntdll/tests/exception.c index 121fbedc72e..078881e363f 100644 --- a/dlls/ntdll/tests/exception.c +++ b/dlls/ntdll/tests/exception.c @@ -9143,7 +9143,7 @@ static void test_walk_stack(void) { ok(addrs[i] == addrs2[i], "i %u, addresses do not match, %p vs %p.\n", i, addrs[i], addrs2[i]); } - todo_wine ok(!!addrs[frame_count - 1], "Expected non-NULL last address.\n"); + ok(!!addrs[frame_count - 1], "Expected non-NULL last address.\n");
for (requested_count = frame_count - 1; requested_count < frame_count + 1; ++requested_count) {
Hi,
While running your changed tests, I think I found new failures. Being a bot and all I'm not very good at pattern recognition, so I might be wrong, but could you please double-check?
Full results can be found at: https://testbot.winehq.org/JobDetails.pl?Key=101109
Your paranoid android.
=== w1064_2qxl (64 bit report) ===
ntdll: exception.c:4451: Test failed: cs64: rsp not inside 64-bit stack 00000000030FF170 / 0000000002CF0000-0000000002D2FD20
=== w1064_tsign (64 bit report) ===
ntdll: exception.c:4451: Test failed: cs64: rsp not inside 64-bit stack 0000000002AFF368 / 0000000000630000-000000000066FD20
Hi,
On 01/11/21 12:13, Paul Gofman wrote:
+USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) +{
- ULONG ret;
- ret = capture_stack_back_trace( skip, count, buffer, hash );
- return min( ret, ~(USHORT)0 );
I don't think this does what you mean: even if you cast to USHORT, the operand gets implicitly promoted to int when you pass it to operator ~, so the result of that expression is 0xffffffff, not 0xffff, which I guess is what you meant.
See for example https://godbolt.org/z/azzejdWM6.
I would suggest to just write 0xffff, or USHRT_MAX.
Thanks, Giovanni.
On 11/2/21 18:06, Giovanni Mascellani wrote:
Hi,
On 01/11/21 12:13, Paul Gofman wrote:
+USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) +{ + ULONG ret;
+ ret = capture_stack_back_trace( skip, count, buffer, hash ); + return min( ret, ~(USHORT)0 );
I don't think this does what you mean: even if you cast to USHORT, the operand gets implicitly promoted to int when you pass it to operator ~, so the result of that expression is 0xffffffff, not 0xffff, which I guess is what you meant.
See for example https://godbolt.org/z/azzejdWM6.
I would suggest to just write 0xffff, or USHRT_MAX.
Thanks, Giovanni.
Indeed, thanks!
-
Giovanni Mascellani -
Marvin -
Paul Gofman