Retrieve GENERIC function body in plugin
Hi, I am writing a plugin to analyse C code by walking the AST in GENERIC format, and have trouble getting the body of function declarations. The plugin registers a callback to PLUGIN_FINISH_UNIT, and therein retrieves function_decl nodes of the current translation unit by iterating over cgraph_nodes. However, getting the function body using DECL_SAVED_TREE(node) always returns NULL. I verified the output of -fdump-translation-unit, and there the function body is available, as output by DECL_SAVED_TREE in tree-dump.c. Am I hooking into the wrong plugin event, or is there something else that I am missing? Thanks, Peter
Re: Retrieve GENERIC function body in plugin
On Wed, Oct 24, 2012 at 12:55:23PM -0400, Peter Colberg wrote: > The plugin registers a callback to PLUGIN_FINISH_UNIT, and therein > retrieves function_decl nodes of the current translation unit by > iterating over cgraph_nodes. However, getting the function body > using DECL_SAVED_TREE(node) always returns NULL. Never mind, I figured out a solution. One may register a callback for PLUGIN_PRE_GENERICIZE, which receives a function declaration as the first argument. This declaration contains the body. Peter
Rename IDENTIFIER_NODE in a plugin
Hello, I am in the process of writing a plugin that parses the header files of a C library using GCC, walks the AST in GENERIC format, and translates to C code for a foreign function interface (for LuaJIT). Many libraries internally use different C type names than those part of the API, using the C preprocessor for name mangling. I would like to rename certain tree nodes back to their known API name, before generating the C output code. How does one reassign the IDENTIFIER_POINTER of an IDENTIFIER_NODE? How is the memory of the identifier string allocated and freed? I have looked at build_string() in tree.c, but this function seems to apply only to STRING_CST nodes. There are also the functions make_node_stat() and build*_stat(), but I cannot find any call to these functions with tree code IDENTIFIER_NODE. I would be thankful for any pointers. Peter
Re: Rename IDENTIFIER_NODE in a plugin
On Tue, Oct 30, 2012 at 01:39:59PM -0400, Peter Colberg wrote: > How does one reassign the IDENTIFIER_POINTER of an IDENTIFIER_NODE? My question does not make sense, since identifiers are immutable. I found an alternative solution used throughout the GCC code: DECL_NAME(decl) = get_identifier(name) get_identifier is mentioned in the documentation as well… http://gcc.gnu.org/onlinedocs/gccint/Identifiers.html#Identifiers Peter
[ANN] gcc-lua: Lua plugin for the GNU Compiler Collection
Hi, It is my pleasure to announce gcc-lua: gcc‑lua extends the GNU Compiler Collection with the ability to run Lua scripts. The plugin provides an interface to register callback functions for plugin events, and inspect the abstract syntax tree of a translation unit. The plugin is useful for static C code analysis. gcc‑lua supports GCC 4.6 or 4.7, and, Lua 5.1 or 5.2, or LuaJIT. http://colberg.org/gcc-lua/ Regards, Peter
