2010/11/26 Christoph Cullmann <cullm...@absint.de>:
> Hi,
>
> I would like to create automagically backtraces (including function names or
> line info, given debug info is around) on crashs.
>
> I found some code that seems to work ok for 32bit mingw:
> http://code.google.com/p/backtrace-mingw/
>
> Is there some similar stuff around for the 64bit version?
> I searched bit the mailing list archives and the net, but found nothing
> working.
>
> Greetings
> Christoph
This small example could give you a good idea how to implement a
backtrace for x64 windows.
#include <windows.h>
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
// Define the function prototypes and structures used by the unwind routines
// not included in the Platform SDK headers
// ???
typedef PVOID PEXCEPTION_ROUTINE;
// http://msdg.microsoft.com/en-us/library/ms680617(VS.85).aspx
typedef struct _KNONVOLATILE_CONTEXT_POINTERS
{
PM128A FloatingContext[16];
PULONG64 IntegerContext[16];
} KNONVOLATILE_CONTEXT_POINTERS, *PKNONVOLATILE_CONTEXT_POINTERS;
PEXCEPTION_ROUTINE WINAPI RtlVirtualUnwind
(ULONG HandlerType, ULONG64 ImageBase, ULONG64 ControlPc,
PRUNTIME_FUNCTION FunctionEntry, PCONTEXT ContextRecord,
PVOID *HandlerData, PULONG64 EstablisherFrame,
PKNONVOLATILE_CONTEXT_POINTERS ContextPointers OPTIONAL);
#define UNWIND_HISTORY_TABLE_SIZE 12
typedef struct _UNWIND_HISTORY_TABLE_ENTRY {
ULONG64 ImageBase;
PRUNTIME_FUNCTION FunctionEntry;
} UNWIND_HISTORY_TABLE_ENTRY, *PUNWIND_HISTORY_TABLE_ENTRY;
#define UNWIND_HISTORY_TABLE_NONE 0
#define UNWIND_HISTORY_TABLE_GLOBAL 1
#define UNWIND_HISTORY_TABLE_LOCAL 2
typedef struct _UNWIND_HISTORY_TABLE {
ULONG Count;
UCHAR Search;
ULONG64 LowAddress;
ULONG64 HighAddress;
UNWIND_HISTORY_TABLE_ENTRY Entry[UNWIND_HISTORY_TABLE_SIZE];
} UNWIND_HISTORY_TABLE, *PUNWIND_HISTORY_TABLE;
PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry
(ULONG64 ControlPc, PULONG64 ImageBase,
PUNWIND_HISTORY_TABLE HistoryTable OPTIONAL);
#ifdef __cplusplus
}
#endif
static void
dump_context (CONTEXT *c)
{
int i;
printf("ACDBx : %016I64x %016I64x %016I64x %016I64x\n",
c->Rax, c->Rcx, c->Rdx, c->Rbx);
printf("SBpSDi: %016I64x %016I64x %016I64x %016I64x\n",
c->Rsp, c->Rbp, c->Rsi, c->Rdi);
printf("r8-11 : %016I64x %016I64x %016I64x %016I64x\n",
c->R8, c->R9, c->R10, c->R11);
printf("r12-15: %016I64x %016I64x %016I64x %016I64x\n",
c->R12, c->R13, c->R14, c->R15);
for (i = 0; i < 16; i += 2)
printf("x%02d-%02d: %016I64x.%016I64x %016I64x.%016I64x\n",
i, i+1,
c->FloatSave.XmmRegisters[i].High,
c->FloatSave.XmmRegisters[i].Low,
c->FloatSave.XmmRegisters[i + 1].High,
c->FloatSave.XmmRegisters[i + 1].Low);
fflush (stdout);
}
void
backtrace (void)
{
CONTEXT context;
int i;
context.ContextFlags = CONTEXT_ALL;
RtlCaptureContext (&context);
for (i = 0; ; i++)
{
PRUNTIME_FUNCTION entry;
ULONG64 ControlPC;
ULONG64 ImageBase;
PVOID HandlerData;
ULONG64 EstablisherFrame;
ControlPC = context.Rip;
entry = RtlLookupFunctionEntry (ControlPC, &ImageBase, NULL);
if (entry == NULL)
break;
printf ("\n#%d %016I64x %p%s\n", i, ControlPC, entry,
(i == 0 ? "(backtrace)" : ""));
dump_context (&context);
RtlVirtualUnwind (0, ImageBase, ControlPC, entry, &context,
&HandlerData, &EstablisherFrame, NULL);
}
}
Regards,
Kai
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