From 2d0d9ef78501a0d3c9b6ab77bd31afa845db7cd3 Mon Sep 17 00:00:00 2001
From: Dwayne Boone <dwayne@zeroc.com>
Date: Thu, 7 May 2009 09:44:25 -0230
Subject: Bug 2664 - show stack traces with C++

---
 cpp/src/IceUtil/Exception.cpp | 143 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)

(limited to 'cpp/src/IceUtil/Exception.cpp')

diff --git a/cpp/src/IceUtil/Exception.cpp b/cpp/src/IceUtil/Exception.cpp
index 55a32df57c2..6c4cb6624ce 100644
--- a/cpp/src/IceUtil/Exception.cpp
+++ b/cpp/src/IceUtil/Exception.cpp
@@ -13,6 +13,11 @@
 #include <ostream>
 #include <cstdlib>
 
+#ifdef __GNUC__
+#  include <execinfo.h>
+#  include <cxxabi.h>
+#endif
+
 using namespace std;
 
 namespace IceUtil
@@ -22,15 +27,147 @@ bool ICE_DECLSPEC_EXPORT nullHandleAbort = false;
 
 };
 
+#ifdef __GNUC__
+namespace
+{
+
+string
+getStackTrace()
+{
+    string stackTrace;
+
+    const size_t maxDepth = 100;
+    void *stackAddrs[maxDepth];
+
+    size_t stackDepth = backtrace(stackAddrs, maxDepth);
+    char **stackStrings = backtrace_symbols(stackAddrs, stackDepth);
+
+    bool checkException = true;
+    for (size_t i = 1; i < stackDepth; i++)
+    {
+        string line(stackStrings[i]);
+
+        //
+        // Don't add the traces for the Exception constructors.
+        //
+        if(checkException)
+        {
+            if(line.find("ExceptionC") != string::npos)
+            {
+                continue;
+            }
+            else
+            {
+                checkException = false;
+            }
+        }
+        else
+        {
+            stackTrace += "\n";
+        }
+
+        stackTrace += "  ";
+        
+        //
+        // For each line attempt to parse the mangled function name as well
+        // as the source library/executable.
+        //
+        string mangled;
+        string::size_type openParen = line.find_first_of('(');
+        if(openParen != string::npos)
+        {
+            //
+            // Format: "/opt/Ice/lib/libIceUtil.so.33(_ZN7IceUtil9ExceptionC2EPKci+0x51) [0x73b267]"
+            //
+            string::size_type closeParen = line.find_first_of(')', openParen);
+            if(closeParen != string::npos)
+            {
+                string tmp = line.substr(openParen + 1, closeParen - openParen - 1);
+                string::size_type plus = tmp.find_last_of('+');
+                if(plus != string::npos)
+                {
+                    mangled = tmp.substr(0 , plus);
+
+                    stackTrace += line.substr(0, openParen); 
+                }
+            }
+        }
+        else
+        {
+            //
+            // Format: "1    libIce.3.3.1.dylib   0x000933a1 _ZN7IceUtil9ExceptionC2EPKci + 71"
+            //
+            string::size_type plus = line.find_last_of('+');
+	    if(plus != string::npos)
+    	    {
+	        string tmp = line.substr(0, plus - 1);
+                string::size_type space = tmp.find_last_of(" \t");
+                if(space != string::npos)
+                {
+                    tmp = tmp.substr(space + 1, tmp.size() - space);
+
+                    string::size_type start = line.find_first_not_of(" \t", 3);
+                    if(start != string::npos)
+                    {
+                        string::size_type finish = line.find_first_of(" \t", start);
+                        if(finish != string::npos)
+                        {
+                            mangled = tmp;
+
+                            stackTrace += line.substr(start, finish - start);
+                        }
+                    }
+                }
+	    }
+        }
+        if(mangled.size() != 0)
+        {
+            stackTrace += ": ";
+
+            //
+            // Unmangle the function name
+            //
+            int status;
+            char* unmangled = abi::__cxa_demangle(mangled.c_str(), 0, 0, &status);
+            if(unmangled)
+            {
+                stackTrace += unmangled;
+                free(unmangled);
+            }
+            else
+            {
+                stackTrace += mangled;
+                stackTrace += "()";
+            }
+        }
+        else
+        {
+            stackTrace += line;
+        }
+    }
+    free(stackStrings);
+
+    return stackTrace;
+}
+
+};
+#endif
+
 IceUtil::Exception::Exception() :
     _file(0),
     _line(0)
+#ifdef __GNUC__
+    , _stackTrace(getStackTrace())
+#endif
 {
 }
     
 IceUtil::Exception::Exception(const char* file, int line) :
     _file(file),
     _line(line)
+#ifdef __GNUC__
+    , _stackTrace(getStackTrace())
+#endif
 {
 }
     
@@ -102,6 +239,12 @@ IceUtil::Exception::ice_line() const
     return _line;
 }
 
+const string&
+IceUtil::Exception::ice_stackTrace() const
+{
+    return _stackTrace;
+}
+
 ostream&
 IceUtil::operator<<(ostream& out, const IceUtil::Exception& ex)
 {
-- 
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