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Support namespaces / modules in bif. Checkpoint.
(now actually commiting all the files) This change is actually two-fold: a) bif's now accept module XYZ; statements and module::ID for function, const, event, enum, etc. declartation b) Added C++-namespaces to variables, functions, etc. that are declared in bif but accessed from C++ This required some (lightweight) re-factoring of the C++ codes. Note, event's don't have their own C++ namespace yet, since this would require a rather huge re-factoring. Compiles and passes test suite. New namespace feature not tested yet. Documentation to follow.
This commit is contained in:
Gregor Maier
parent
86fdd1dcf3
commit
f79ea244fa
31 changed files with 332 additions and 228 deletions
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@ -9,6 +9,10 @@ using namespace std;
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#include <stdio.h>
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#include <stdlib.h>
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#include "module_util.h"
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using namespace std;
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extern int line_number;
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extern char* input_filename;
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@ -23,39 +27,128 @@ extern FILE* fp_netvar_def;
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extern FILE* fp_netvar_init;
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int in_c_code = 0;
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string current_module = GLOBAL_MODULE_NAME;
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int definition_type;
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const char* bro_prefix;
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const char* c_prefix;
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enum {
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C_SEGMENT_DEF,
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FUNC_DEF,
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REWRITER_DEF,
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EVENT_DEF,
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ENUM_DEF,
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CONST_DEF,
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RECORD_DEF,
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};
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// Holds the name of a declared object (function, enum, record type, event,
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// etc. and information about namespaces, etc.
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struct decl_struct {
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string module_name;
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string bare_name; // name without module or namespace
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string c_namespace_start; // "opening" namespace for use in netvar_*
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string c_namespace_end; // closing "}" for all the above namespaces
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string c_fullname; // fully qualified name (namespace::....) for use in netvar_init
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string bro_fullname; // fully qualified bro name, for netvar (and lookup_ID())
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string bro_name; // the name as we read it from input. What we write into the .bro file
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// special cases for events. Events have an EventHandlerPtr
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// and a generate_* function. This name is for the generate_* function
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string generate_bare_name;
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string generate_c_fullname;
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string generate_c_namespace_start;
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string generate_c_namespace_end;
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} decl;
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void set_definition_type(int type)
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{
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definition_type = type;
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switch ( type ) {
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case FUNC_DEF:
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bro_prefix = "";
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c_prefix = "bro_";
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}
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void set_decl_name(const char *name)
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{
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decl.module_name = extract_module_name(name);
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decl.bare_name = extract_var_name(name);
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decl.c_namespace_start = "";
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decl.c_namespace_end = "";
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decl.c_fullname = "";
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decl.bro_fullname = "";
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decl.bro_name = "";
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decl.generate_c_fullname = "";
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decl.generate_bare_name = string("generate_") + decl.bare_name;
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decl.generate_c_namespace_start = "";
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decl.generate_c_namespace_end = "";
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switch ( definition_type ) {
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case ENUM_DEF:
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decl.c_namespace_start = "namespace BifTypePtr { namespace Enum { ";
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decl.c_namespace_end = " } }";
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decl.c_fullname = "BifTypePtr::Enum::";
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break;
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case RECORD_DEF:
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decl.c_namespace_start = "namespace BifTypePtr { namespace Record { ";
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decl.c_namespace_end = " } }";
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decl.c_fullname = "BifTypePtr::Record::";
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break;
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case CONST_DEF:
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decl.c_namespace_start = "namespace BifConst { ";
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decl.c_namespace_end = " } ";
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decl.c_fullname = "BifConst::";
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break;
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case REWRITER_DEF:
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bro_prefix = "rewrite_";
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c_prefix = "bro_rewrite_";
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// XXX: Legacy. No module names / namespaces supported
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// If support for namespaces is desired: add a namespace
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// to c_namespace_* and bro_fullname and get rid of
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// the hack to bro_name.
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decl.c_namespace_start = "";
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decl.c_namespace_end = "";
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decl.bare_name = "rewrite_" + decl.bare_name;
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decl.bro_name = "rewrite_";
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break;
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case FUNC_DEF:
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decl.c_namespace_start = "namespace BifFunc { ";
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decl.c_namespace_end = " } ";
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decl.c_fullname = "BifFunc::";
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break;
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case EVENT_DEF:
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bro_prefix = "";
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c_prefix = "bro_event_";
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decl.c_namespace_start = "";
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decl.c_namespace_end = "";
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decl.c_fullname = "";
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decl.generate_c_namespace_start = "namespace BifEvent { ";
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decl.generate_c_namespace_end = " } ";
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decl.generate_c_fullname = "BifEvent::";
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break;
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case C_SEGMENT_DEF:
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default:
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break;
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}
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if (decl.module_name != GLOBAL_MODULE_NAME)
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{
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decl.c_namespace_start += "namespace " + decl.module_name + " { ";
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decl.c_namespace_end += string(" }");
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decl.c_fullname += decl.module_name + "::";
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decl.bro_fullname += decl.module_name + "::";
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decl.generate_c_namespace_start += "namespace " + decl.module_name + " { ";
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decl.generate_c_namespace_end += " } ";
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decl.generate_c_fullname += decl.module_name + "::";
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}
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decl.bro_fullname += decl.bare_name;
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if (definition_type == FUNC_DEF)
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decl.bare_name = string("bro_") + decl.bare_name;
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decl.c_fullname += decl.bare_name;
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decl.bro_name += name;
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decl.generate_c_fullname += decl.generate_bare_name;
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}
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const char* arg_list_name = "BiF_ARGS";
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@ -63,7 +156,6 @@ const char* trace_rewriter_name = "trace_rewriter";
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#include "bif_arg.h"
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extern const char* decl_name;
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int var_arg; // whether the number of arguments is variable
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std::vector<BuiltinFuncArg*> args;
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@ -87,9 +179,15 @@ char* concat(const char* str1, const char* str2)
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}
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// Print the bro_event_* function prototype in C++, without the ending ';'
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void print_event_c_prototype(FILE *fp)
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void print_event_c_prototype(FILE *fp, bool is_header)
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{
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fprintf(fp, "void %s%s(Analyzer* analyzer%s", c_prefix, decl_name,
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if (is_header)
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fprintf(fp, "%s void %s(Analyzer* analyzer%s",
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decl.generate_c_namespace_start.c_str(), decl.generate_bare_name.c_str(),
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args.size() ? ", " : "" );
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else
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fprintf(fp, "void %s(Analyzer* analyzer%s",
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decl.generate_c_fullname.c_str(),
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args.size() ? ", " : "" );
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for ( int i = 0; i < (int) args.size(); ++i )
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{
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@ -98,6 +196,10 @@ void print_event_c_prototype(FILE *fp)
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args[i]->PrintCArg(fp, i);
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}
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fprintf(fp, ")");
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if (is_header)
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fprintf(fp, "; %s\n", decl.generate_c_namespace_end.c_str());
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else
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fprintf(fp, "\n");
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}
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// Print the bro_event_* function body in C++.
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@ -106,9 +208,9 @@ void print_event_c_body(FILE *fp)
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fprintf(fp, "\t{\n");
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fprintf(fp, "\t// Note that it is intentional that here we do not\n");
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fprintf(fp, "\t// check if %s is NULL, which should happen *before*\n",
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decl_name);
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fprintf(fp, "\t// bro_event_%s is called to avoid unnecessary Val\n",
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decl_name);
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decl.c_fullname.c_str());
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fprintf(fp, "\t// %s is called to avoid unnecessary Val\n",
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decl.generate_c_fullname.c_str());
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fprintf(fp, "\t// allocation.\n");
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fprintf(fp, "\n");
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@ -138,7 +240,7 @@ void print_event_c_body(FILE *fp)
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fprintf(fp, "\n");
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fprintf(fp, "\tmgr.QueueEvent(%s, vl, SOURCE_LOCAL, analyzer->GetID(), timer_mgr",
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decl_name);
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decl.c_fullname.c_str());
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if ( connection_arg )
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// Pass the connection to the EventMgr as the "cookie"
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@ -146,13 +248,14 @@ void print_event_c_body(FILE *fp)
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fprintf(fp, ");\n");
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fprintf(fp, "\t} // event generation\n");
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//fprintf(fp, "%s // end namespace\n", decl.generate_c_namespace_end.c_str());
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}
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%}
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%token TOK_LPP TOK_RPP TOK_LPB TOK_RPB TOK_LPPB TOK_RPPB TOK_VAR_ARG
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%token TOK_BOOL
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%token TOK_FUNCTION TOK_REWRITER TOK_EVENT TOK_CONST TOK_ENUM
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%token TOK_TYPE TOK_RECORD
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%token TOK_TYPE TOK_RECORD TOK_MODULE
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%token TOK_WRITE TOK_PUSH TOK_EOF TOK_TRACE
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%token TOK_ARGS TOK_ARG TOK_ARGC
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%token TOK_ID TOK_ATTR TOK_CSTR TOK_LF TOK_WS TOK_COMMENT
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@ -170,7 +273,15 @@ void print_event_c_body(FILE *fp)
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%%
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definitions: definitions definition opt_ws
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builtin_lang: definitions
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{
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fprintf(fp_bro_init, "} # end of export section\n");
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fprintf(fp_bro_init, "module %s;\n", GLOBAL_MODULE_NAME);
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}
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definitions: definitions definition opt_ws
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{ fprintf(fp_func_def, "%s", $3); }
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| opt_ws
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{
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@ -189,6 +300,7 @@ definitions: definitions definition opt_ws
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fprintf(fp_netvar_h, "// %s\n\n", auto_gen_comment);
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fprintf(fp_netvar_init, "// %s\n\n", auto_gen_comment);
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fprintf(fp_bro_init, "export {\n");
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fprintf(fp_func_def, "%s", $1);
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}
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;
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@ -200,9 +312,16 @@ definition: event_def
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| enum_def
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| const_def
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| type_def
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| module_def
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;
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module_def: TOK_MODULE opt_ws TOK_ID opt_ws ';'
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{
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current_module = $2;
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fprintf(fp_bro_init, "module %s;\n", $2);
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}
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// XXX: Add the netvar glue so that the event engine knows about
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// the type. One still has to define the type in bro.init.
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// Would be nice, if we could just define the record type here
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@ -213,26 +332,26 @@ definition: event_def
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// TODO: add other types (tables, sets)
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type_def: TOK_TYPE opt_ws TOK_ID opt_ws ':' opt_ws TOK_RECORD opt_ws ';'
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{
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fprintf(fp_netvar_h,
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"namespace BroTypePtr { namespace Record { extern RecordType* %s; } }\n", $3);
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fprintf(fp_netvar_def,
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"namespace BroTypePtr { namespace Record { RecordType* %s; } }\n", $3);
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set_definition_type(RECORD_DEF);
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set_decl_name($3);
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fprintf(fp_netvar_h, "%s extern RecordType * %s; %s\n",
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decl.c_namespace_start.c_str(), decl.bare_name.c_str(), decl.c_namespace_end.c_str());
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fprintf(fp_netvar_def, "%s RecordType * %s; %s\n",
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decl.c_namespace_start.c_str(), decl.bare_name.c_str(), decl.c_namespace_end.c_str());
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fprintf(fp_netvar_init,
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"\tBroTypePtr::Record::%s = internal_type(\"%s\")->AsRecordType();\n",
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$3, $3);
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"\t%s = internal_type(\"%s\")->AsRecordType();\n",
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decl.c_fullname.c_str(), decl.bro_fullname.c_str());
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}
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;
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event_def: event_prefix opt_ws plain_head opt_attr end_of_head ';'
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{
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print_event_c_prototype(fp_func_h);
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fprintf(fp_func_h, ";\n");
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print_event_c_prototype(fp_func_def);
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fprintf(fp_func_def, "\n");
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print_event_c_prototype(fp_func_h, true);
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print_event_c_prototype(fp_func_def, false);
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print_event_c_body(fp_func_def);
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}
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;
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func_def: func_prefix opt_ws typed_head end_of_head body
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;
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@ -243,24 +362,34 @@ enum_def: enum_def_1 enum_list TOK_RPB
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{
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// First, put an end to the enum type decl.
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fprintf(fp_bro_init, "};\n");
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fprintf(fp_netvar_h, "}; }\n");
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if (decl.module_name != GLOBAL_MODULE_NAME)
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fprintf(fp_netvar_h, "}; } }\n");
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else
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fprintf(fp_netvar_h, "}; }\n");
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// Now generate the netvar's.
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fprintf(fp_netvar_h,
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"namespace BroTypePtr { namespace Enum { extern EnumType* %s;\n } }", decl_name);
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fprintf(fp_netvar_def,
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"namespace BroTypePtr { namespace Enum { EnumType* %s; } }\n", decl_name);
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fprintf(fp_netvar_h, "%s extern EnumType * %s; %s\n",
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decl.c_namespace_start.c_str(), decl.bare_name.c_str(), decl.c_namespace_end.c_str());
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fprintf(fp_netvar_def, "%s EnumType * %s; %s\n",
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decl.c_namespace_start.c_str(), decl.bare_name.c_str(), decl.c_namespace_end.c_str());
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fprintf(fp_netvar_init,
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"\tBroTypePtr::Enum::%s = internal_type(\"%s\")->AsEnumType();\n",
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decl_name, decl_name);
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"\t%s = internal_type(\"%s\")->AsEnumType();\n",
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decl.c_fullname.c_str(), decl.bro_fullname.c_str());
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}
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;
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enum_def_1: TOK_ENUM opt_ws TOK_ID opt_ws TOK_LPB opt_ws
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{
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decl_name = $3;
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fprintf(fp_bro_init, "type %s: enum %s{%s", $3, $4, $6);
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fprintf(fp_netvar_h, "namespace BroEnum { ");
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set_definition_type(ENUM_DEF);
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set_decl_name($3);
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fprintf(fp_bro_init, "type %s: enum %s{%s", decl.bro_name.c_str(), $4, $6);
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// this is the namespace were the enumerators are defined, not where
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// the type is defined.
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// We don't support fully qualified names as enumerators. Use a module name
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fprintf(fp_netvar_h, "namespace BifEnum { ");
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if (decl.module_name != GLOBAL_MODULE_NAME)
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fprintf(fp_netvar_h, "namespace %s { ", decl.module_name.c_str());
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fprintf(fp_netvar_h, "enum %s {\n", $3);
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}
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;
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@ -281,18 +410,21 @@ enum_list: enum_list TOK_ID opt_ws ',' opt_ws
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const_def: const_def_1 const_init opt_attr ';'
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{
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fprintf(fp_bro_init, ";\n");
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fprintf(fp_netvar_h, "extern int %s;\n", decl_name);
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fprintf(fp_netvar_def, "int %s;\n", decl_name);
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fprintf(fp_netvar_h, "%s extern int %s; %s\n",
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decl.c_namespace_start.c_str(), decl.bare_name.c_str(), decl.c_namespace_end.c_str());
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fprintf(fp_netvar_def, "%s int %s; %s\n",
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decl.c_namespace_start.c_str(), decl.bare_name.c_str(), decl.c_namespace_end.c_str());
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fprintf(fp_netvar_init, "\t%s = internal_val(\"%s\")->AsBool();\n",
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decl_name, decl_name);
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decl.c_fullname.c_str(), decl.bro_fullname.c_str());
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}
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;
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const_def_1: TOK_CONST opt_ws TOK_ID opt_ws
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{
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decl_name = $3;
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set_definition_type(CONST_DEF);
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set_decl_name($3);
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fprintf(fp_bro_init, "const%s", $2);
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fprintf(fp_bro_init, "%s: bool%s", $3, $4);
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fprintf(fp_bro_init, "%s: bool%s", decl.bro_name.c_str(), $4);
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}
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;
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@ -364,7 +496,7 @@ plain_head: head_1 args arg_end opt_ws
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head_1: TOK_ID opt_ws arg_begin
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{
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const char* method_type = 0;
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decl_name = $1;
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set_decl_name($1);
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if ( definition_type == FUNC_DEF || definition_type == REWRITER_DEF )
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{
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@ -376,40 +508,37 @@ head_1: TOK_ID opt_ws arg_begin
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if ( method_type )
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fprintf(fp_bro_init,
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"global %s%s: %s%s(",
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bro_prefix, decl_name, method_type, $2);
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"global %s: %s%s(",
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decl.bro_name.c_str(), method_type, $2);
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if ( definition_type == FUNC_DEF || definition_type == REWRITER_DEF )
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{
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fprintf(fp_func_init,
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"\textern Val* %s%s(Frame* frame, val_list*);\n",
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c_prefix, decl_name);
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fprintf(fp_func_init,
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"\t(void) new BuiltinFunc(%s%s, \"%s%s\", 0);\n",
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c_prefix, decl_name, bro_prefix, decl_name);
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"\t(void) new BuiltinFunc(%s, \"%s\", 0);\n",
|
||||
decl.c_fullname.c_str(), decl.bro_fullname.c_str());
|
||||
|
||||
fprintf(fp_func_h,
|
||||
"extern Val* %s%s(Frame* frame, val_list*);\n",
|
||||
c_prefix, decl_name);
|
||||
"%sextern Val* %s(Frame* frame, val_list*);\n %s",
|
||||
decl.c_namespace_start.c_str(), decl.bare_name.c_str(), decl.c_namespace_end.c_str());
|
||||
|
||||
fprintf(fp_func_def,
|
||||
"Val* %s%s(Frame* frame, val_list* %s)",
|
||||
c_prefix, decl_name, arg_list_name);
|
||||
"Val* %s(Frame* frame, val_list* %s)",
|
||||
decl.c_fullname.c_str(), arg_list_name);
|
||||
}
|
||||
else if ( definition_type == EVENT_DEF )
|
||||
{
|
||||
// TODO: add namespace for events here
|
||||
fprintf(fp_netvar_h,
|
||||
"extern EventHandlerPtr %s;\n",
|
||||
decl_name);
|
||||
"%sextern EventHandlerPtr %s; %s\n",
|
||||
decl.c_namespace_start.c_str(), decl.bare_name.c_str(), decl.c_namespace_end.c_str());
|
||||
|
||||
fprintf(fp_netvar_def,
|
||||
"EventHandlerPtr %s;\n",
|
||||
decl_name);
|
||||
"%sEventHandlerPtr %s; %s\n",
|
||||
decl.c_namespace_start.c_str(), decl.bare_name.c_str(), decl.c_namespace_end.c_str());
|
||||
|
||||
fprintf(fp_netvar_init,
|
||||
"\t%s = internal_handler(\"%s\");\n",
|
||||
decl_name, decl_name);
|
||||
decl.c_fullname.c_str(), decl.bro_fullname.c_str());
|
||||
|
||||
// C++ prototypes of bro_event_* functions will
|
||||
// be generated later.
|
||||
|
|
@ -455,7 +584,7 @@ return_type: ':' opt_ws TOK_ID opt_ws
|
|||
|
||||
body: body_start c_body body_end
|
||||
{
|
||||
fprintf(fp_func_def, " // end of %s\n", decl_name);
|
||||
fprintf(fp_func_def, " // end of %s\n", decl.c_fullname.c_str());
|
||||
print_line_directive(fp_func_def);
|
||||
}
|
||||
;
|
||||
|
|
@ -492,7 +621,7 @@ body_start: TOK_LPB c_code_begin
|
|||
fprintf(fp_func_def, "\t\t{\n");
|
||||
fprintf(fp_func_def,
|
||||
"\t\trun_time(\"%s() takes exactly %d argument(s)\");\n",
|
||||
decl_name, argc);
|
||||
decl.bro_fullname.c_str(), argc);
|
||||
fprintf(fp_func_def, "\t\treturn 0;\n");
|
||||
fprintf(fp_func_def, "\t\t}\n");
|
||||
}
|
||||
|
|
@ -502,7 +631,7 @@ body_start: TOK_LPB c_code_begin
|
|||
fprintf(fp_func_def, "\t\t{\n");
|
||||
fprintf(fp_func_def,
|
||||
"\t\trun_time(\"%s() takes at least %d argument(s)\");\n",
|
||||
decl_name, argc);
|
||||
decl.bro_fullname.c_str(), argc);
|
||||
fprintf(fp_func_def, "\t\treturn 0;\n");
|
||||
fprintf(fp_func_def, "\t\t}\n");
|
||||
}
|
||||
|
|
@ -586,7 +715,6 @@ opt_ws: opt_ws TOK_WS
|
|||
extern char* yytext;
|
||||
extern char* input_filename;
|
||||
extern int line_number;
|
||||
const char* decl_name;
|
||||
void err_exit(void);
|
||||
|
||||
void print_msg(const char msg[])
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue