tracy/client/TracyCallstack.hpp

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#ifndef __TRACYCALLSTACK_HPP__
#define __TRACYCALLSTACK_HPP__
#include "TracyCallstack.h"
#if TRACY_HAS_CALLSTACK == 1
extern "C"
{
typedef unsigned long (__stdcall *t_RtlWalkFrameChain)( void**, unsigned long, unsigned long );
extern t_RtlWalkFrameChain RtlWalkFrameChain;
}
#elif TRACY_HAS_CALLSTACK == 2
# include <unwind.h>
#elif TRACY_HAS_CALLSTACK == 3
# include <execinfo.h>
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#endif
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#ifdef TRACY_HAS_CALLSTACK
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#include <assert.h>
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#include <stdint.h>
#include <string.h>
#include "../common/TracyAlloc.hpp"
#include "../common/TracyForceInline.hpp"
namespace tracy
{
struct CallstackEntry
{
const char* name;
const char* file;
uint32_t line;
};
struct CallstackEntryData
{
const CallstackEntry* data;
uint8_t size;
};
CallstackEntryData DecodeCallstackPtr( uint64_t ptr );
void InitCallstack();
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#if TRACY_HAS_CALLSTACK == 1
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static tracy_force_inline void* Callstack( int depth )
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{
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assert( depth >= 1 && depth < 63 );
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auto trace = (uintptr_t*)tracy_malloc( ( 1 + depth ) * sizeof( uintptr_t ) );
const auto num = RtlWalkFrameChain( (void**)( trace + 1 ), depth, 0 );
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*trace = num;
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return trace;
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}
#elif TRACY_HAS_CALLSTACK == 2
struct BacktraceState
{
void** current;
void** end;
};
static _Unwind_Reason_Code tracy_unwind_callback( struct _Unwind_Context* ctx, void* arg )
{
auto state = (BacktraceState*)arg;
uintptr_t pc = _Unwind_GetIP( ctx );
if( pc )
{
if( state->current == state->end ) return _URC_END_OF_STACK;
*state->current++ = (void*)pc;
}
return _URC_NO_REASON;
}
static tracy_force_inline void* Callstack( int depth )
{
assert( depth >= 1 && depth < 63 );
auto trace = (uintptr_t*)tracy_malloc( ( 1 + depth ) * sizeof( uintptr_t ) );
BacktraceState state = { (void**)(trace+1), (void**)(trace+1+depth) };
_Unwind_Backtrace( tracy_unwind_callback, &state );
*trace = (uintptr_t*)state.current - trace + 1;
return trace;
}
#elif TRACY_HAS_CALLSTACK == 3
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static tracy_force_inline void* Callstack( int depth )
{
assert( depth >= 1 );
auto trace = (uintptr_t*)tracy_malloc( ( 1 + depth ) * sizeof( uintptr_t ) );
const auto num = backtrace( (void**)(trace+1), depth );
*trace = num;
return trace;
}
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#endif
}
#endif
#endif