Initial framework for win32 backtrace

Makefile.am

@@ -96,10 +96,12 @@ UTIL_FILES   =		\
     version.hpp
 
 
-if HAVE_EXECINFO
+if PLATFORM_LINUX
 UTIL_FILES += backtrace_execinfo.cpp
-else
-UTIL_FILES += backtrace_null.cpp
+endif
+
+if PLATFORM_WIN32
+UTIL_FILES += backtrace_win32.cpp
 endif
 
 CLEANFILES = json.cpp version.cpp ip.cpp

backtrace.hpp

@@ -15,8 +15,9 @@ namespace debug {
             const decltype(m_frames)& frames(void) const
                 { return m_frames; }
     };
+
+    std::ostream&
+    operator <<(std::ostream&, const debug::backtrace&);
 }
 
-std::ostream&
-operator <<(std::ostream&, const debug::backtrace&);
 

backtrace_execinfo.cpp

@@ -23,7 +23,7 @@ debug::backtrace::backtrace (void):
 
 
 ostream&
-operator <<(ostream &os, const debug::backtrace &rhs) {
+debug::operator <<(ostream &os, const debug::backtrace &rhs) {
     const auto frames = rhs.frames ();
 
     typedef unique_ptr<char *[], decltype(&std::free)> unique_str;

backtrace_win32.cpp

@@ -0,0 +1,48 @@
+#include "backtrace.hpp"
+
+#include "debug.hpp"
+#include "except.hpp"
+#include "memory.hpp"
+
+#include <cstdlib>
+#include <iostream>
+#include <windows.h>
+#include <dbghelp.h>
+
+
+debug::backtrace::backtrace (void) {
+    m_frames.resize (DEFAULT_DEPTH);
+
+    auto process = GetCurrentProcess();
+    if (!SymInitialize (process, NULL, TRUE))
+        win32_error::throw_code ();
+
+    while (CaptureStackBackTrace (1, m_frames.size (), m_frames.data (), NULL) == m_frames.size ())
+        m_frames.resize (m_frames.size () * 2);
+}
+
+
+std::ostream&
+debug::operator <<(std::ostream &os, const debug::backtrace &rhs) {
+    os << "Fuck Windows and it's stupid backtracing\n";
+    return os;
+
+    auto process = GetCurrentProcess ();
+    if (!process)
+        win32_error::throw_code ();
+
+    static const size_t MAX_LENGTH = 255;
+    scoped_malloc<void> symbol_mem (calloc (sizeof (SYMBOL_INFO) + MAX_LENGTH + 1, 1));
+
+    SYMBOL_INFO *symbol  = static_cast<SYMBOL_INFO*> (symbol_mem.get ());
+    symbol->MaxNameLen   = MAX_LENGTH;
+    symbol->SizeOfStruct = sizeof (SYMBOL_INFO);
+
+    for (void *frame: rhs.frames ()) {
+        std::cerr << process << " " << frame << " " << symbol << "\n";
+        SymFromAddr (process, (DWORD64)frame, 0, symbol);
+        std::cerr << frame << "\t" << symbol->Name << "\n";
+    }
+
+    return os;
+}

configure.ac

@@ -95,9 +95,14 @@ COMMON_CFLAGS="$COMMON_CFLAGS -D_GNU_SOURCE"
 
 case $host_os in
     mingw32)
+        AM_CONDITIONAL([PLATFORM_WIN32], [true])
+        AM_CONDITIONAL([PLATFORM_LINUX], [false])
+        COMMON_LDFLAGS="$COMMON_LDFLAGS -ldbghelp"
         ;;
 
     linux-gnu)
+        AM_CONDITIONAL([PLATFORM_WIN32], [false])
+        AM_CONDITIONAL([PLATFORM_LINUX], [true])
         ;;
 
     *)