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Shared Source CLI Essentials
book

Shared Source CLI Essentials

by David Stutz, Geoff Shilling, Ted Neward
March 2003
Intermediate to advanced content levelIntermediate to advanced
384 pages
10h 55m
English
O'Reilly Media, Inc.
Content preview from Shared Source CLI Essentials

JIT Compiler Macros

The JIT compiler uses a large system of interrelated macros. The following verifier macros can be found in clr/src/fjit/fjitverifier.h:

CHECK_STACK
CHECK_STACK_SIZE

When verification is turned on, these macros will verify that the evaluation stack is deep enough to be valid or that it matches an exact depth.

FJIT_FAIL

This macro will cause the current JIT compilation to fail and return an error code.

VALIDITY_CHECK

If verification is turned on, this macro will conditionally terminate a JIT compilation and return an error code that indicates that invalid code was provided.

VERIFICATION_CHECK

If verification is turned on, this macro will conditionally emit code to throw a verification exception. It is used within the JIT compiler.

There is a large series of macros used to emit code, which is contained in clr/src/fjit/fjitdef.h and is augmented by platform-specific redefinition files that can be found in subdirectories named after their processor targets:

x86_*

These are low-level, x86-specific macros used by fjitdef.h.

ppc_*

These are low-level, PowerPC-specific macros used by fjitdef.h.

emit_*

These are high-level, macros defined in fjitdef.h that can be redefined by platform-specific low-level macros.

emit_<IL OPCODE NAME>_*

These are portable macros that implement opcodes, and are frequently separated by the size of the stack and frame registers.

ARG_*

These definitions represent argument registers.

RETURN_*

These definitions represent return value registers. ...

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Publisher Resources

ISBN: 059600351XCatalog PageErrata