FYI: Shark debug LLVM 2.6 API fix and Shark debugging tips.

[Xerxes Rånby]

The attached and committed patch fixed the following Shark compile error
during debug builds when using LLVM 2.6 or later.

/home/xerxes/icedtea6-1.6/openjdk-ecj/hotspot/src/share/vm/shark/sharkBuilder.cpp:
In member function 'llvm::CallInst* SharkBuilder::CreateDump(llvm::Value*)':
/home/xerxes/icedtea6-1.6/openjdk-ecj/hotspot/src/share/vm/shark/sharkBuilder.cpp:518:
error: 'class llvm::StringRef' has no member named 'c_str'
make[7]: *** [sharkBuilder.o] Error 1

If you want to create a Shark debug build then apply the mixtec-hacks.patch found in
http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2009-April/005361.html

it enables some more shark specific debug options like:
-XX:+SharkTraceInstalls     that will print when compiled methods are inserted into the jvm
-XX:SharkPrintBitcodeOf=methodName    displays the llvm ir for the method
-XX:SharkPrintAsmOf=methodName        displays the generated asm for the compiled method

... and makes shark generally more debugger friendly.

Cheers
Xerxes

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