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author | Xavier Leroy <xavier.leroy@inria.fr> | 2015-10-11 17:43:59 +0200 |
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committer | Xavier Leroy <xavier.leroy@inria.fr> | 2015-10-11 17:43:59 +0200 |
commit | 7a6bb90048db7a254e959b1e3c308bac5fe6c418 (patch) | |
tree | 6119d963ce34b56386f79693972e8ce86d9c0e87 /common/Behaviors.v | |
parent | 659b735ed2dbefcbe8bcb2ec2123b66019ddaf14 (diff) | |
download | compcert-7a6bb90048db7a254e959b1e3c308bac5fe6c418.tar.gz compcert-7a6bb90048db7a254e959b1e3c308bac5fe6c418.zip |
Use Coq strings instead of idents to name external and builtin functions.
The AST.ident type represents source-level identifiers as unique positive numbers. However, the mapping identifiers <-> AST.ident differs between runs of CompCert on different source files. This is problematic when we need to produce or recognize external functions and builtin functions with fixed names, for example:
* in $ARCH/Machregs.v to define the register conventions for builtin functions;
* in the VST program logic from Princeton to treat thread primitives specially.
So far, we used AST.ident_of_string to recover the ident associated with a string. However, this function is defined in OCaml and doesn't execute within Coq. This is a problem both for VST and for future executability of CompCert within Coq.
This commit replaces "ident" by "string" in the arguments of EF_external, EF_builtin, EF_inline_asm, EF_annot, and EF_annot_val. This provides stable names for externals and builtins, as needed. For inline asm and annotations, it's a matter of taste, but using strings feels more natural. EF_debug keeps using idents, since some kinds of EF_debug annotations talk about program variables.
Diffstat (limited to 'common/Behaviors.v')
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