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ntdll: Implement RtlCaptureStackBackTrace() for x86_64. 

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=40868
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47101
Signed-off-by: Chip Davis <cdavis@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
stable
Chip Davis 2019-07-31 16:57:10 -05:00 committed by Alexandre Julliard
parent 1010857a00
commit 4e4aa46775
1 changed files with 109 additions and 2 deletions
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111
dlls/ntdll/signal_x86_64.c
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@ -4436,13 +4436,120 @@ __ASM_GLOBAL_FUNC( RtlRaiseException,
"call " __ASM_NAME("RtlRaiseStatus") /* does not return */ );
static inline ULONG hash_pointers( void **ptrs, ULONG count )
{
/* Based on MurmurHash2, which is in the public domain */
static const ULONG m = 0x5bd1e995;
static const ULONG r = 24;
ULONG hash = count * sizeof(void*);
for (; count > 0; ptrs++, count--)
{
ULONG_PTR data = (ULONG_PTR)*ptrs;
ULONG k1 = (ULONG)(data & 0xffffffff), k2 = (ULONG)(data >> 32);
k1 *= m;
k1 = (k1 ^ (k1 >> r)) * m;
k2 *= m;
k2 = (k2 ^ (k2 >> r)) * m;
hash = (((hash * m) ^ k1) * m) ^ k2;
}
hash = (hash ^ (hash >> 13)) * m;
return hash ^ (hash >> 15);
}
/*************************************************************************
* RtlCaptureStackBackTrace (NTDLL.@)
*/
USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
{
FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
return 0;
UNWIND_HISTORY_TABLE table;
DISPATCHER_CONTEXT dispatch;
CONTEXT context;
LDR_MODULE *module;
NTSTATUS status;
ULONG i;
USHORT num_entries = 0;
TRACE( "(%u, %u, %p, %p)", skip, count, buffer, hash );
RtlCaptureContext( &context );
dispatch.TargetIp = 0;
dispatch.ContextRecord = &context;
dispatch.HistoryTable = &table;
if (hash) *hash = 0;
for (i = 0; i < skip + count; i++)
{
/* FIXME: should use the history table to make things faster */
dispatch.ImageBase = 0;
dispatch.ControlPc = context.Rip;
dispatch.ScopeIndex = 0;
/* first look for PE exception information */
if ((dispatch.FunctionEntry = lookup_function_info( dispatch.ControlPc, &dispatch.ImageBase, &module )))
{
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase, dispatch.ControlPc,
dispatch.FunctionEntry, &context, &dispatch.HandlerData,
&dispatch.EstablisherFrame, NULL );
goto unwind_done;
}
/* then look for host system exception information */
if (!module || (module->Flags & LDR_WINE_INTERNAL))
{
BOOL got_info = FALSE;
struct dwarf_eh_bases bases;
const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(dispatch.ControlPc - 1), &bases );
if (fde)
{
status = dwarf_virtual_unwind( dispatch.ControlPc, &dispatch.EstablisherFrame, &context,
fde, &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
if (status != STATUS_SUCCESS) return status;
got_info = TRUE;
}
#ifdef HAVE_LIBUNWIND_H
else
{
status = libunwind_virtual_unwind( dispatch.ControlPc, &got_info, &dispatch.EstablisherFrame, &context,
&dispatch.LanguageHandler, &dispatch.HandlerData );
if (status != STATUS_SUCCESS) return i;
}
#endif
if (got_info)
{
dispatch.FunctionEntry = NULL;
goto unwind_done;
}
}
else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
context.Rip = *(ULONG64 *)context.Rsp;
context.Rsp = context.Rsp + sizeof(ULONG64);
dispatch.EstablisherFrame = context.Rsp;
unwind_done:
if (!dispatch.EstablisherFrame) break;
if ((dispatch.EstablisherFrame & 7) ||
dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
{
ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
break;
}
if (context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
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 );
return num_entries;
}