The regular HELPER_METHOD_FRAME_BEGIN/END assumes that it is right next to the stack frame of jitted code.
<stack frame of the method with HELPER_METHOD_FRAME> <stack frame of jitted method> Your change probably made stack frames to look like this: <stack frame of the method with HELPER_METHOD_FRAME> <stack frame of your new code> <stack frame of jitted method> One way to fix it is to jump instead of call at the end of your assembly - this will eliminate the intermediate stack frame, but it may not be an option for you if you need to do some bookkeeping after the call to JIT_NewArr1 as well. The other option is to specify Frame::FRAME_ATTR_CAPTURE_DEPTH_2 as attribute for HELPER_METHOD_FRAME. This will tell the stackwalking infrastructure that there is an intermediate frame. Check how it is done in ArrayStoreCheck in clr\src\VM\i386\cgenx86.cpp. Also, if you haven't stepped through your new assembly code in debugger and verified that everything work properly, there is a good chance that something is getting corrupted by your code. If the answer above does not helpful, I would recommend stepping through your assembly code in debugger and double check everything - I have found many of my mistakes this way in the past. -Jan This posting is provided "AS IS" with no warranties, and confers no rights. -----Original Message----- From: Discussion of the Rotor Shared Source CLI implementation [mailto:[EMAIL PROTECTED] On Behalf Of John Locke Sent: Wednesday, August 13, 2003 4:55 PM To: [EMAIL PROTECTED] Subject: [DOTNET-ROTOR] Wrapping the JIT_NewArr1 helper function. I'm changing the implementation of get_jit_helper(newarray) so that at first invocation of get_jit_helper, I create new assembly on the fly and then return the address of that new assembly. The new assembly does some bookkeeping and then attempts to call JIT_NewArr1. At the end of JIT_NewArr1 in HELPER_METHOD_FRAME_END, a null reference exception is thrown at line 109 of gmsx86.cpp. Any suggestions? Do I need to emit the equivalent of HELPER_METHOD_FRAME_END in the assembly code I generate on the fly? What about generating the code added by HCIMPL2 as well? Help! John __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com
