Factor: a practical stack language: Frame-based structured ...
Factor for the use of exception handlers guided, registered managers are guided AddVectoredExceptionHandler however somewhat problematic. A manager of vectors is always called before any frame-based managers to factor could ultimately false report exceptions if the FFI is used to call an internal library that uses HEU. This prompted me to switch to exception handlers based on the images. Unfortunately, they are much more complex to use, and implementation varies between 32-bit and 64-bit Windows.
I spoke briefly HEU framework based on Windows 32-bit in my previous post.During the transition to 64-bit, Microsoft get rid of the old implementation SEH frame-based and has introduced a new approach less general. Instead of push and pop exception handlers in a linked list at runtime, the system maintains a set of function tables, where each table stores feature exceptional handling and the stack frame unwinding of the information.
Normally, the Windows 64-bit function tables are written to the file executable by the native compiler. However, language implementations generate code enforcement must be able to define new tables dynamic function.This is done with the RtlAddFunctionTable () function.
It took me a while to find the right way of calling this function. I found the source file os_windows_x86.cpp Sun Java HotSpot Implementation has been very helpful, and I based on the function code of this file.
Factor and HotSpot use arrays only operate in a very simple to set up an exception handler. table function can also be used to define the behavior of stack unwinding, thereby generating Backtrace debuggers, and so on. Doing this is more complicated and I do not understand how it works, so I will not attempt to discuss here.
The API requires that it be within the pile of code enforcement. To circumvent this restriction, the two virtual machines allocated a small trampoline in the pile of code that simply jumps to the exception handler, and use a pointer to the trampoline instead.
Source: Factor: a practical stack language: Frame-based structured ...
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