Windows callstack inspection plumbing.

client/TracyCallstack.hpp

@@ -0,0 +1,52 @@
+#ifndef __TRACYCALLSTACK_HPP__
+#define __TRACYCALLSTACK_HPP__
+
+#ifdef _WIN32
+#  define TRACY_HAS_CALLSTACK
+#  ifndef MAXLONG
+extern "C" __declspec(dllimport) unsigned short __stdcall RtlCaptureStackBackTrace( unsigned long, unsigned long, void**, unsigned long* );
+#  endif
+#endif
+
+#ifdef TRACY_HAS_CALLSTACK
+
+#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;
+};
+
+#ifdef _WIN32
+
+void InitCallstack();
+CallstackEntry DecodeCallstackPtr( uint64_t ptr );
+
+tracy_force_inline const char* Callstack()
+{
+    enum { StackDepth = 24 };
+    static_assert( StackDepth <= 63, "Stack depth can't be greater than 63." );
+
+    auto trace = (uint64_t*)tracy_malloc( ( 1 + StackDepth ) * sizeof( uint64_t ) );
+    const auto num = RtlCaptureStackBackTrace( 0, StackDepth, (void**)( trace+1 ), nullptr );
+    *trace = num;
+
+    return (const char*)trace;
+}
+
+#endif
+
+}
+
+#endif
+
+#endif