1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2012 Jean Privat <jean@pryen.org>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
18 module abstract_compiler
24 private import annotation
26 # Add compiling options
27 redef class ToolContext
29 var opt_output
: OptionString = new OptionString("Output file", "-o", "--output")
31 var opt_dir
: OptionString = new OptionString("Output directory", "--dir")
33 var opt_no_cc
: OptionBool = new OptionBool("Do not invoke C compiler", "--no-cc")
35 var opt_no_main
: OptionBool = new OptionBool("Do not generate main entry point", "--no-main")
37 var opt_cc_path
: OptionArray = new OptionArray("Set include path for C header files (may be used more than once)", "--cc-path")
39 var opt_make_flags
: OptionString = new OptionString("Additional options to make", "--make-flags")
41 var opt_compile_dir
: OptionString = new OptionString("Directory used to generate temporary files", "--compile-dir")
43 var opt_hardening
: OptionBool = new OptionBool("Generate contracts in the C code against bugs in the compiler", "--hardening")
45 var opt_no_shortcut_range
: OptionBool = new OptionBool("Always insantiate a range and its iterator on 'for' loops", "--no-shortcut-range")
46 # --no-check-covariance
47 var opt_no_check_covariance
: OptionBool = new OptionBool("Disable type tests of covariant parameters (dangerous)", "--no-check-covariance")
48 # --no-check-attr-isset
49 var opt_no_check_attr_isset
: OptionBool = new OptionBool("Disable isset tests before each attribute access (dangerous)", "--no-check-attr-isset")
51 var opt_no_check_assert
: OptionBool = new OptionBool("Disable the evaluation of explicit 'assert' and 'as' (dangerous)", "--no-check-assert")
53 var opt_no_check_autocast
: OptionBool = new OptionBool("Disable implicit casts on unsafe expression usage (dangerous)", "--no-check-autocast")
55 var opt_no_check_null
: OptionBool = new OptionBool("Disable tests of null receiver (dangerous)", "--no-check-null")
57 var opt_no_check_all
: OptionBool = new OptionBool("Disable all tests (dangerous)", "--no-check-all")
58 # --typing-test-metrics
59 var opt_typing_test_metrics
: OptionBool = new OptionBool("Enable static and dynamic count of all type tests", "--typing-test-metrics")
60 # --invocation-metrics
61 var opt_invocation_metrics
: OptionBool = new OptionBool("Enable static and dynamic count of all method invocations", "--invocation-metrics")
62 # --isset-checks-metrics
63 var opt_isset_checks_metrics
: OptionBool = new OptionBool("Enable static and dynamic count of isset checks before attributes access", "--isset-checks-metrics")
65 var opt_stacktrace
: OptionString = new OptionString("Control the generation of stack traces", "--stacktrace")
67 var opt_no_gcc_directive
= new OptionArray("Disable a advanced gcc directives for optimization", "--no-gcc-directive")
69 var opt_release
= new OptionBool("Compile in release mode and finalize application", "--release")
74 self.option_context
.add_option
(self.opt_output
, self.opt_dir
, self.opt_no_cc
, self.opt_no_main
, self.opt_make_flags
, self.opt_compile_dir
, self.opt_hardening
, self.opt_no_shortcut_range
)
75 self.option_context
.add_option
(self.opt_no_check_covariance
, self.opt_no_check_attr_isset
, self.opt_no_check_assert
, self.opt_no_check_autocast
, self.opt_no_check_null
, self.opt_no_check_all
)
76 self.option_context
.add_option
(self.opt_typing_test_metrics
, self.opt_invocation_metrics
, self.opt_isset_checks_metrics
)
77 self.option_context
.add_option
(self.opt_stacktrace
)
78 self.option_context
.add_option
(self.opt_no_gcc_directive
)
79 self.option_context
.add_option
(self.opt_release
)
82 redef fun process_options
(args
)
86 var st
= opt_stacktrace
.value
87 if st
== "none" or st
== "libunwind" or st
== "nitstack" then
89 else if st
== "auto" or st
== null then
91 opt_stacktrace
.value
= "nitstack"
93 print
"Error: unknown value `{st}` for --stacktrace. Use `none`, `libunwind`, `nitstack` or `auto`."
97 if opt_output
.value
!= null and opt_dir
.value
!= null then
98 print
"Error: cannot use both --dir and --output"
102 if opt_no_check_all
.value
then
103 opt_no_check_covariance
.value
= true
104 opt_no_check_attr_isset
.value
= true
105 opt_no_check_assert
.value
= true
106 opt_no_check_autocast
.value
= true
107 opt_no_check_null
.value
= true
112 redef class ModelBuilder
113 # The compilation directory
114 var compile_dir
: String
116 # Simple indirection to `Toolchain::write_and_make`
117 protected fun write_and_make
(compiler
: AbstractCompiler)
119 var platform
= compiler
.mainmodule
.target_platform
121 if platform
== null then
122 toolchain
= new MakefileToolchain(toolcontext
)
124 toolchain
= platform
.toolchain
(toolcontext
)
126 compile_dir
= toolchain
.compile_dir
127 toolchain
.write_and_make compiler
132 fun toolchain
(toolcontext
: ToolContext): Toolchain is abstract
136 var toolcontext
: ToolContext
138 fun compile_dir
: String
140 var compile_dir
= toolcontext
.opt_compile_dir
.value
141 if compile_dir
== null then compile_dir
= ".nit_compile"
145 fun write_and_make
(compiler
: AbstractCompiler) is abstract
148 class MakefileToolchain
150 # The list of directories to search for included C headers (-I for C compilers)
151 # The list is initially set with :
152 # * the toolcontext --cc-path option
153 # * the NIT_CC_PATH environment variable
154 # * `toolcontext.nit_dir`
155 # Path can be added (or removed) by the client
156 var cc_paths
= new Array[String]
158 protected fun gather_cc_paths
160 # Look for the the Nit clib path
161 var path_env
= toolcontext
.nit_dir
162 if path_env
!= null then
163 var libname
= "{path_env}/clib"
164 if libname
.file_exists
then cc_paths
.add
(libname
)
167 if cc_paths
.is_empty
then
168 toolcontext
.error
(null, "Cannot determine the nit clib path. define envvar NIT_DIR.")
171 # Add user defined cc_paths
172 cc_paths
.append
(toolcontext
.opt_cc_path
.value
)
174 path_env
= "NIT_CC_PATH".environ
175 if not path_env
.is_empty
then
176 cc_paths
.append
(path_env
.split_with
(':'))
180 redef fun write_and_make
(compiler
)
184 var mainmodule
= compiler
.mainmodule
185 var compile_dir
= compile_dir
187 # Generate the .h and .c files
188 # A single C file regroups many compiled rumtime functions
189 # Note that we do not try to be clever an a small change in a Nit source file may change the content of all the generated .c files
191 self.toolcontext
.info
("*** WRITING C ***", 1)
195 var cfiles
= new Array[String]
196 write_files
(compiler
, compile_dir
, cfiles
)
198 # Generate the Makefile
200 write_makefile
(compiler
, compile_dir
, cfiles
)
203 self.toolcontext
.info
("*** END WRITING C: {time1-time0} ***", 2)
205 # Execute the Makefile
207 if self.toolcontext
.opt_no_cc
.value
then return
210 self.toolcontext
.info
("*** COMPILING C ***", 1)
212 compile_c_code
(compiler
, compile_dir
)
215 self.toolcontext
.info
("*** END COMPILING C: {time1-time0} ***", 2)
218 fun write_files
(compiler
: AbstractCompiler, compile_dir
: String, cfiles
: Array[String])
220 var platform
= compiler
.mainmodule
.target_platform
221 if self.toolcontext
.opt_stacktrace
.value
== "nitstack" and (platform
== null or platform
.supports_libunwind
) then compiler
.build_c_to_nit_bindings
222 var cc_opt_with_libgc
= "-DWITH_LIBGC"
223 if platform
!= null and not platform
.supports_libgc
then cc_opt_with_libgc
= ""
225 # Add gc_choser.h to aditionnal bodies
226 var gc_chooser
= new ExternCFile("gc_chooser.c", cc_opt_with_libgc
)
227 compiler
.extern_bodies
.add
(gc_chooser
)
228 compiler
.files_to_copy
.add
"{cc_paths.first}/gc_chooser.c"
229 compiler
.files_to_copy
.add
"{cc_paths.first}/gc_chooser.h"
232 var m2m
= toolcontext
.modelbuilder
.mmodule2nmodule
233 for m
in compiler
.mainmodule
.in_importation
.greaters
do
234 compiler
.finalize_ffi_for_module
(m
)
237 # Copy original .[ch] files to compile_dir
238 for src
in compiler
.files_to_copy
do
239 var basename
= src
.basename
("")
240 var dst
= "{compile_dir}/{basename}"
244 var hfilename
= compiler
.header
.file
.name
+ ".h"
245 var hfilepath
= "{compile_dir}/{hfilename}"
246 var h
= new OFStream.open
(hfilepath
)
247 for l
in compiler
.header
.decl_lines
do
251 for l
in compiler
.header
.lines
do
257 for f
in compiler
.files
do
259 var hfile
: nullable OFStream = null
261 var cfilename
= "{f.name}.0.h"
262 var cfilepath
= "{compile_dir}/{cfilename}"
263 hfile
= new OFStream.open
(cfilepath
)
264 hfile
.write
"#include \"{hfilename}\
"\n"
265 for key
in f
.required_declarations
do
266 if not compiler
.provided_declarations
.has_key
(key
) then
267 var node
= compiler
.requirers_of_declarations
.get_or_null
(key
)
269 node
.debug
"No provided declaration for {key}"
271 print
"No provided declaration for {key}"
275 hfile
.write compiler
.provided_declarations
[key
]
279 var file
: nullable OFStream = null
280 for vis
in f
.writers
do
281 if vis
== compiler
.header
then continue
282 var total_lines
= vis
.lines
.length
+ vis
.decl_lines
.length
283 if total_lines
== 0 then continue
285 if file
== null or count
> 10000 then
287 if file
!= null then file
.close
288 cfilename
= "{f.name}.{i}.c"
289 cfilepath
= "{compile_dir}/{cfilename}"
290 self.toolcontext
.info
("new C source files to compile: {cfilepath}", 3)
291 cfiles
.add
(cfilename
)
292 file
= new OFStream.open
(cfilepath
)
293 file
.write
"#include \"{f.name}.0.h\
"\n"
296 for l
in vis
.decl_lines
do
300 for l
in vis
.lines
do
305 if file
!= null then file
.close
308 self.toolcontext
.info
("Total C source files to compile: {cfiles.length}", 2)
311 fun makefile_name
(mainmodule
: MModule): String do return "{mainmodule.name}.mk"
313 fun default_outname
(mainmodule
: MModule): String do return mainmodule
.name
315 # Combine options and platform informations to get the final path of the outfile
316 fun outfile
(mainmodule
: MModule): String
318 var res
= self.toolcontext
.opt_output
.value
319 if res
!= null then return res
320 res
= default_outname
(mainmodule
)
321 var dir
= self.toolcontext
.opt_dir
.value
322 if dir
!= null then return dir
.join_path
(res
)
326 fun write_makefile
(compiler
: AbstractCompiler, compile_dir
: String, cfiles
: Array[String])
328 var mainmodule
= compiler
.mainmodule
329 var platform
= compiler
.mainmodule
.target_platform
331 var outname
= outfile
(mainmodule
)
333 var orig_dir
=".." # FIXME only works if `compile_dir` is a subdirectory of cwd
334 var outpath
= orig_dir
.join_path
(outname
).simplify_path
335 var makename
= makefile_name
(mainmodule
)
336 var makepath
= "{compile_dir}/{makename}"
337 var makefile
= new OFStream.open
(makepath
)
341 cc_includes
+= " -I \"" + p + "\
""
344 var linker_options
= new HashSet[String]
345 var m2m
= toolcontext
.modelbuilder
.mmodule2nmodule
346 for m
in mainmodule
.in_importation
.greaters
do
347 var libs
= m
.collect_linker_libs
348 if libs
!= null then linker_options
.add_all
(libs
)
351 makefile
.write
("CC = ccache cc\nCXX = ccache c++\nCFLAGS = -g -O2 -Wno-unused-value -Wno-switch\nCINCL = {cc_includes}\nLDFLAGS ?= \nLDLIBS ?= -lm -lgc {linker_options.join(" ")}\n\n")
353 var ost
= toolcontext
.opt_stacktrace
.value
354 if (ost
== "libunwind" or ost
== "nitstack") and (platform
== null or platform
.supports_libunwind
) then makefile
.write
("NEED_LIBUNWIND := YesPlease\n")
356 # Dynamic adaptations
357 # While `platform` enable complex toolchains, they are statically applied
358 # For a dynamic adaptsation of the compilation, the generated Makefile should check and adapt things itself
360 # Check and adapt the targeted system
361 makefile
.write
("uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')\n")
362 makefile
.write
("ifeq ($(uname_S),Darwin)\n")
363 # remove -lunwind since it is already included on macosx
364 makefile
.write
("\tNEED_LIBUNWIND :=\n")
365 makefile
.write
("endif\n\n")
367 # Check and adapt for the compiler used
368 # clang need an additionnal `-Qunused-arguments`
369 makefile
.write
("clang_check := $(shell sh -c '$(CC) -v 2>&1 | grep -q clang; echo $$?')\nifeq ($(clang_check), 0)\n\tCFLAGS += -Qunused-arguments\nendif\n")
371 makefile
.write
("ifdef NEED_LIBUNWIND\n\tLDLIBS += -lunwind\nendif\n")
373 makefile
.write
("all: {outpath}\n\n")
375 var ofiles
= new Array[String]
376 var dep_rules
= new Array[String]
377 # Compile each generated file
379 var o
= f
.strip_extension
(".c") + ".o"
380 makefile
.write
("{o}: {f}\n\t$(CC) $(CFLAGS) $(CINCL) -c -o {o} {f}\n\n")
385 var java_files
= new Array[ExternFile]
387 # Compile each required extern body into a specific .o
388 for f
in compiler
.extern_bodies
do
389 var o
= f
.makefile_rule_name
390 var ff
= f
.filename
.basename
("")
391 makefile
.write
("{o}: {ff}\n")
392 makefile
.write
("\t{f.makefile_rule_content}\n\n")
393 dep_rules
.add
(f
.makefile_rule_name
)
395 if f
.compiles_to_o_file
then ofiles
.add
(o
)
396 if f
.add_to_jar
then java_files
.add
(f
)
399 if not java_files
.is_empty
then
400 var jar_file
= "{outpath}.jar"
402 var class_files_array
= new Array[String]
403 for f
in java_files
do class_files_array
.add
(f
.makefile_rule_name
)
404 var class_files
= class_files_array
.join
(" ")
406 makefile
.write
("{jar_file}: {class_files}\n")
407 makefile
.write
("\tjar cf {jar_file} {class_files}\n\n")
408 dep_rules
.add jar_file
412 makefile
.write
("{outpath}: {dep_rules.join(" ")}\n\t$(CC) $(LDFLAGS) -o {outpath} {ofiles.join(" ")} $(LDLIBS)\n\n")
414 makefile
.write
("clean:\n\trm {ofiles.join(" ")} 2>/dev/null\n\n")
416 self.toolcontext
.info
("Generated makefile: {makepath}", 2)
419 fun compile_c_code
(compiler
: AbstractCompiler, compile_dir
: String)
421 var makename
= makefile_name
(compiler
.mainmodule
)
423 var makeflags
= self.toolcontext
.opt_make_flags
.value
424 if makeflags
== null then makeflags
= ""
425 self.toolcontext
.info
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags}", 2)
428 if self.toolcontext
.verbose_level
>= 3 then
429 res
= sys
.system
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1")
431 res
= sys
.system
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1 >/dev/null")
434 toolcontext
.error
(null, "make failed! Error code: {res}.")
439 # Singleton that store the knowledge about the compilation process
440 abstract class AbstractCompiler
441 type VISITOR: AbstractCompilerVisitor
443 # Table corresponding c_names to nit names (methods)
444 var names
= new HashMap[String, String]
446 # The main module of the program currently compiled
447 # Is assigned during the separate compilation
448 var mainmodule
: MModule is writable
450 # The real main module of the program
451 var realmainmodule
: MModule
453 # The modeulbuilder used to know the model and the AST
454 var modelbuilder
: ModelBuilder is protected writable
456 # Is hardening asked? (see --hardening)
457 fun hardening
: Bool do return self.modelbuilder
.toolcontext
.opt_hardening
.value
459 init(mainmodule
: MModule, modelbuilder
: ModelBuilder)
461 self.mainmodule
= mainmodule
462 self.realmainmodule
= mainmodule
463 self.modelbuilder
= modelbuilder
466 # Force the creation of a new file
467 # The point is to avoid contamination between must-be-compiled-separately files
468 fun new_file
(name
: String): CodeFile
470 var f
= new CodeFile(name
)
475 # The list of all associated files
476 # Used to generate .c files
477 var files
: List[CodeFile] = new List[CodeFile]
479 # Initialize a visitor specific for a compiler engine
480 fun new_visitor
: VISITOR is abstract
482 # Where global declaration are stored (the main .h)
483 var header
: CodeWriter is writable
485 # Provide a declaration that can be requested (before or latter) by a visitor
486 fun provide_declaration
(key
: String, s
: String)
488 if self.provided_declarations
.has_key
(key
) then
489 assert self.provided_declarations
[key
] == s
491 self.provided_declarations
[key
] = s
494 private var provided_declarations
= new HashMap[String, String]
496 private var requirers_of_declarations
= new HashMap[String, ANode]
498 # Builds the .c and .h files to be used when generating a Stack Trace
499 # Binds the generated C function names to Nit function names
500 fun build_c_to_nit_bindings
502 var compile_dir
= modelbuilder
.compile_dir
504 var stream
= new OFStream.open
("{compile_dir}/c_functions_hash.c")
505 stream
.write
("#include <string.h>\n")
506 stream
.write
("#include <stdlib.h>\n")
507 stream
.write
("#include \"c_functions_hash
.h\
"\n")
508 stream
.write
("typedef struct C_Nit_Names\{char* name; char* nit_name;\}C_Nit_Names;\n")
509 stream
.write
("const char* get_nit_name(register const char* procproc, register unsigned int len)\{\n")
510 stream
.write
("char* procname = malloc(len+1);")
511 stream
.write
("memcpy(procname, procproc, len);")
512 stream
.write
("procname[len] = '\\0';")
513 stream
.write
("static const C_Nit_Names map[{names.length}] = \{\n")
514 for i
in names
.keys
do
517 stream.write("\
",\"")
518 stream.write(names[i])
519 stream.write("\
"\},\n")
521 stream
.write
("\};\n")
522 stream
.write
("int i;")
523 stream
.write
("for(i = 0; i < {names.length}; i++)\{")
524 stream
.write
("if(strcmp(procname,map[i].name) == 0)\{")
525 stream
.write
("free(procname);")
526 stream
.write
("return map[i].nit_name;")
529 stream
.write
("free(procname);")
530 stream
.write
("return NULL;")
534 stream
= new OFStream.open
("{compile_dir}/c_functions_hash.h")
535 stream
.write
("const char* get_nit_name(register const char* procname, register unsigned int len);\n")
538 extern_bodies
.add
(new ExternCFile("{compile_dir}/c_functions_hash.c", ""))
542 # This method call compile_header_strucs method that has to be refined
543 fun compile_header
do
545 var toolctx
= modelbuilder
.toolcontext
546 self.header
.add_decl
("#include <stdlib.h>")
547 self.header
.add_decl
("#include <stdio.h>")
548 self.header
.add_decl
("#include <string.h>")
549 self.header
.add_decl
("#include \"gc_chooser
.h\
"")
550 self.header
.add_decl
("#ifdef ANDROID")
551 self.header
.add_decl
(" #include <android/log.h>")
552 self.header
.add_decl
(" #define PRINT_ERROR(...) (void)__android_log_print(ANDROID_LOG_WARN, \"Nit\
", __VA_ARGS__)")
553 self.header
.add_decl
("#else")
554 self.header
.add_decl
(" #define PRINT_ERROR(...) fprintf(stderr, __VA_ARGS__)")
555 self.header
.add_decl
("#endif")
557 compile_header_structs
558 compile_nitni_structs
560 var gccd_disable
= modelbuilder
.toolcontext
.opt_no_gcc_directive
.value
561 if gccd_disable
.has
("noreturn") or gccd_disable
.has
("all") then
562 # Signal handler function prototype
563 self.header
.add_decl
("void show_backtrace(int);")
565 self.header
.add_decl
("void show_backtrace(int) __attribute__ ((noreturn));")
568 if gccd_disable
.has
("likely") or gccd_disable
.has
("all") then
569 self.header
.add_decl
("#define likely(x) (x)")
570 self.header
.add_decl
("#define unlikely(x) (x)")
571 else if gccd_disable
.has
("correct-likely") then
572 # invert the `likely` definition
573 # Used by masochists to bench the worst case
574 self.header
.add_decl
("#define likely(x) __builtin_expect((x),0)")
575 self.header
.add_decl
("#define unlikely(x) __builtin_expect((x),1)")
577 self.header
.add_decl
("#define likely(x) __builtin_expect((x),1)")
578 self.header
.add_decl
("#define unlikely(x) __builtin_expect((x),0)")
581 # Global variable used by intern methods
582 self.header
.add_decl
("extern int glob_argc;")
583 self.header
.add_decl
("extern char **glob_argv;")
584 self.header
.add_decl
("extern val *glob_sys;")
587 # Declaration of structures for live Nit types
588 protected fun compile_header_structs
is abstract
590 # Declaration of structures for nitni undelying the FFI
591 protected fun compile_nitni_structs
593 self.header
.add_decl
"""
594 /* Native reference to Nit objects */
595 /* This structure is used to represent every Nit type in extern methods and custom C code. */
597 struct nitni_ref *next,
598 *prev; /* adjacent global references in global list */
599 int count; /* number of time this global reference has been marked */
602 /* List of global references from C code to Nit objects */
603 /* Instanciated empty at init of Nit system and filled explicitly by user in C code */
604 struct nitni_global_ref_list_t {
605 struct nitni_ref *head, *tail;
607 extern struct nitni_global_ref_list_t *nitni_global_ref_list;
609 /* Initializer of global reference list */
610 extern void nitni_global_ref_list_init();
612 /* Intern function to add a global reference to the list */
613 extern void nitni_global_ref_add( struct nitni_ref *ref );
615 /* Intern function to remove a global reference from the list */
616 extern void nitni_global_ref_remove( struct nitni_ref *ref );
618 /* Increase count on an existing global reference */
619 extern void nitni_global_ref_incr( struct nitni_ref *ref );
621 /* Decrease count on an existing global reference */
622 extern void nitni_global_ref_decr( struct nitni_ref *ref );
626 fun compile_finalizer_function
628 var finalizable_type
= mainmodule
.finalizable_type
629 if finalizable_type
== null then return
631 var finalize_meth
= mainmodule
.try_get_primitive_method
("finalize", finalizable_type
.mclass
)
633 if finalize_meth
== null then
634 modelbuilder
.toolcontext
.error
(null, "The `Finalizable` class doesn't declare the `finalize` method.")
638 var v
= self.new_visitor
639 v
.add_decl
"void gc_finalize (void *obj, void *client_data) \{"
640 var recv
= v
.new_expr
("obj", finalizable_type
)
641 v
.send
(finalize_meth
, [recv
])
645 # Generate the main C function.
649 # * allocate the Sys object if it exists
650 # * call init if is exists
651 # * call main if it exists
652 fun compile_main_function
654 var v
= self.new_visitor
655 v
.add_decl
("#include <signal.h>")
656 var ost
= modelbuilder
.toolcontext
.opt_stacktrace
.value
657 var platform
= mainmodule
.target_platform
659 if platform
!= null and not platform
.supports_libunwind
then ost
= "none"
661 var no_main
= (platform
!= null and platform
.no_main
) or modelbuilder
.toolcontext
.opt_no_main
.value
663 if ost
== "nitstack" or ost
== "libunwind" then
664 v
.add_decl
("#define UNW_LOCAL_ONLY")
665 v
.add_decl
("#include <libunwind.h>")
666 if ost
== "nitstack" then
667 v
.add_decl
("#include \"c_functions_hash
.h\
"")
670 v
.add_decl
("int glob_argc;")
671 v
.add_decl
("char **glob_argv;")
672 v
.add_decl
("val *glob_sys;")
674 if self.modelbuilder
.toolcontext
.opt_typing_test_metrics
.value
then
675 for tag
in count_type_test_tags
do
676 v
.add_decl
("long count_type_test_resolved_{tag};")
677 v
.add_decl
("long count_type_test_unresolved_{tag};")
678 v
.add_decl
("long count_type_test_skipped_{tag};")
679 v
.compiler
.header
.add_decl
("extern long count_type_test_resolved_{tag};")
680 v
.compiler
.header
.add_decl
("extern long count_type_test_unresolved_{tag};")
681 v
.compiler
.header
.add_decl
("extern long count_type_test_skipped_{tag};")
685 if self.modelbuilder
.toolcontext
.opt_invocation_metrics
.value
then
686 v
.add_decl
("long count_invoke_by_tables;")
687 v
.add_decl
("long count_invoke_by_direct;")
688 v
.add_decl
("long count_invoke_by_inline;")
689 v
.compiler
.header
.add_decl
("extern long count_invoke_by_tables;")
690 v
.compiler
.header
.add_decl
("extern long count_invoke_by_direct;")
691 v
.compiler
.header
.add_decl
("extern long count_invoke_by_inline;")
694 if self.modelbuilder
.toolcontext
.opt_isset_checks_metrics
.value
then
695 v
.add_decl
("long count_attr_reads = 0;")
696 v
.add_decl
("long count_isset_checks = 0;")
697 v
.compiler
.header
.add_decl
("extern long count_attr_reads;")
698 v
.compiler
.header
.add_decl
("extern long count_isset_checks;")
701 v
.add_decl
("void sig_handler(int signo)\{")
702 v
.add_decl
("PRINT_ERROR(\"Caught signal
: %s\\n\
", strsignal(signo));")
703 v
.add_decl
("show_backtrace(signo);")
706 v
.add_decl
("void show_backtrace (int signo) \{")
707 if ost
== "nitstack" or ost
== "libunwind" then
708 v
.add_decl
("char* opt = getenv(\"NIT_NO_STACK\
");")
709 v
.add_decl
("unw_cursor_t cursor;")
710 v
.add_decl
("if(opt==NULL)\{")
711 v
.add_decl
("unw_context_t uc;")
712 v
.add_decl
("unw_word_t ip;")
713 v
.add_decl
("char* procname = malloc(sizeof(char) * 100);")
714 v
.add_decl
("unw_getcontext(&uc);")
715 v
.add_decl
("unw_init_local(&cursor, &uc);")
716 v
.add_decl
("PRINT_ERROR(\"-------------------------------------------------\\n\
");")
717 v
.add_decl
("PRINT_ERROR(\"-- Stack Trace ------------------------------\\n\
");")
718 v
.add_decl
("PRINT_ERROR(\"-------------------------------------------------\\n\
");")
719 v
.add_decl
("while (unw_step(&cursor) > 0) \{")
720 v
.add_decl
(" unw_get_proc_name(&cursor, procname, 100, &ip);")
721 if ost
== "nitstack" then
722 v
.add_decl
(" const char* recv = get_nit_name(procname, strlen(procname));")
723 v
.add_decl
(" if (recv != NULL)\{")
724 v
.add_decl
(" PRINT_ERROR(\"` %s\\n\", recv);")
725 v.add_decl(" \}else\{")
726 v.add_decl(" PRINT_ERROR(\"` %s\\n\
", procname);")
729 v
.add_decl
(" PRINT_ERROR(\"` %s \\n\",procname);")
732 v.add_decl("PRINT_ERROR(\"-------------------------------------------------\\n\");")
733 v.add_decl("free(procname);")
736 v.add_decl("exit(signo);")
740 v.add_decl("int nit_main(int argc, char** argv) \{")
742 v.add_decl("int main(int argc, char** argv) \{")
745 v.add("signal(SIGABRT, sig_handler);")
746 v.add("signal(SIGFPE, sig_handler);")
747 v.add("signal(SIGILL, sig_handler);")
748 v.add("signal(SIGINT, sig_handler);")
749 v.add("signal(SIGTERM, sig_handler);")
750 v.add("signal(SIGSEGV, sig_handler);")
751 v.add("signal(SIGPIPE, sig_handler);")
753 v.add("glob_argc = argc; glob_argv = argv;")
754 v.add("initialize_gc_option();")
756 v.add "initialize_nitni_global_refs();"
758 var main_type = mainmodule.sys_type
759 if main_type != null then
760 var mainmodule = v.compiler.mainmodule
761 var glob_sys = v.init_instance(main_type)
762 v.add("glob_sys = {glob_sys};")
763 var main_init = mainmodule.try_get_primitive_method("init", main_type.mclass)
764 if main_init != null then
765 v.send(main_init, [glob_sys])
767 var main_method = mainmodule.try_get_primitive_method("run", main_type.mclass) or else
768 mainmodule.try_get_primitive_method("main", main_type.mclass)
769 if main_method != null then
770 v.send(main_method, [glob_sys])
774 if self.modelbuilder.toolcontext.opt_typing_test_metrics.value then
775 v.add_decl("long count_type_test_resolved_total = 0;")
776 v.add_decl("long count_type_test_unresolved_total = 0;")
777 v.add_decl("long count_type_test_skipped_total = 0;")
778 v.add_decl("long count_type_test_total_total = 0;")
779 for tag in count_type_test_tags do
780 v.add_decl("long count_type_test_total_{tag};")
781 v.add("count_type_test_total_{tag} = count_type_test_resolved_{tag} + count_type_test_unresolved_{tag} + count_type_test_skipped_{tag};")
782 v.add("count_type_test_resolved_total += count_type_test_resolved_{tag};")
783 v.add("count_type_test_unresolved_total += count_type_test_unresolved_{tag};")
784 v.add("count_type_test_skipped_total += count_type_test_skipped_{tag};")
785 v.add("count_type_test_total_total += count_type_test_total_{tag};")
787 v.add("printf(\"# dynamic count_type_test: total %l\\n\");")
788 v.add("printf(\"\\tresolved\\tunresolved\\tskipped\\ttotal\\n\");")
789 var tags = count_type_test_tags.to_a
792 v.add("printf(\"{tag}\");")
793 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_resolved_{tag}, 100.0*count_type_test_resolved_{tag}/count_type_test_total_total);")
794 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_unresolved_{tag}, 100.0*count_type_test_unresolved_{tag}/count_type_test_total_total);")
795 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_skipped_{tag}, 100.0*count_type_test_skipped_{tag}/count_type_test_total_total);")
796 v.add("printf(\"\\t%ld (%.2f%%)\\n\", count_type_test_total_{tag}, 100.0*count_type_test_total_{tag}/count_type_test_total_total);")
800 if self.modelbuilder.toolcontext.opt_invocation_metrics.value then
801 v.add_decl("long count_invoke_total;")
802 v.add("count_invoke_total = count_invoke_by_tables + count_invoke_by_direct + count_invoke_by_inline;")
803 v.add("printf(\"# dynamic count_invocation: total %ld\\n\", count_invoke_total);")
804 v.add("printf(\"by table: %ld (%.2f%%)\\n\", count_invoke_by_tables, 100.0*count_invoke_by_tables/count_invoke_total);")
805 v.add("printf(\"direct: %ld (%.2f%%)\\n\", count_invoke_by_direct, 100.0*count_invoke_by_direct/count_invoke_total);")
806 v.add("printf(\"inlined: %ld (%.2f%%)\\n\", count_invoke_by_inline, 100.0*count_invoke_by_inline/count_invoke_total);")
809 if self.modelbuilder.toolcontext.opt_isset_checks_metrics.value then
810 v.add("printf(\"# dynamic attribute reads: %ld\\n\", count_attr_reads);")
811 v.add("printf(\"# dynamic isset checks: %ld\\n\", count_isset_checks);")
818 # Copile all C functions related to the [incr|decr]_ref features of the FFI
819 fun compile_nitni_global_ref_functions
821 var v = self.new_visitor
823 struct nitni_global_ref_list_t *nitni_global_ref_list;
824 void initialize_nitni_global_refs() {
825 nitni_global_ref_list = (struct nitni_global_ref_list_t*)nit_alloc(sizeof(struct nitni_global_ref_list_t));
826 nitni_global_ref_list->head = NULL;
827 nitni_global_ref_list->tail = NULL;
830 void nitni_global_ref_add( struct nitni_ref *ref ) {
831 if ( nitni_global_ref_list->head == NULL ) {
832 nitni_global_ref_list->head = ref;
835 nitni_global_ref_list->tail->next = ref;
836 ref->prev = nitni_global_ref_list->tail;
838 nitni_global_ref_list->tail = ref;
843 void nitni_global_ref_remove( struct nitni_ref *ref ) {
844 if ( ref->prev == NULL ) {
845 nitni_global_ref_list->head = ref->next;
847 ref->prev->next = ref->next;
850 if ( ref->next == NULL ) {
851 nitni_global_ref_list->tail = ref->prev;
853 ref->next->prev = ref->prev;
857 extern void nitni_global_ref_incr( struct nitni_ref *ref ) {
858 if ( ref->count == 0 ) /* not registered */
861 nitni_global_ref_add( ref );
867 extern void nitni_global_ref_decr( struct nitni_ref *ref ) {
868 if ( ref->count == 1 ) /* was last reference */
870 /* remove from list */
871 nitni_global_ref_remove( ref );
879 # List of additional files required to compile (FFI)
880 var extern_bodies = new Array[ExternFile]
882 # List of source files to copy over to the compile dir
883 var files_to_copy = new Array[String]
885 # This is used to avoid adding an extern file more than once
886 private var seen_extern = new ArraySet[String]
888 # Generate code that initialize the attributes on a new instance
889 fun generate_init_attr(v: VISITOR, recv: RuntimeVariable, mtype: MClassType)
891 var cds = mtype.collect_mclassdefs(self.mainmodule).to_a
892 self.mainmodule.linearize_mclassdefs(cds)
894 var n = self.modelbuilder.mclassdef2nclassdef[cd]
895 for npropdef in n.n_propdefs do
896 if npropdef isa AAttrPropdef then
897 npropdef.init_expr(v, recv)
903 # Generate code that check if an attribute is correctly initialized
904 fun generate_check_attr(v: VISITOR, recv: RuntimeVariable, mtype: MClassType)
906 var cds = mtype.collect_mclassdefs(self.mainmodule).to_a
907 self.mainmodule.linearize_mclassdefs(cds)
909 var n = self.modelbuilder.mclassdef2nclassdef[cd]
910 for npropdef in n.n_propdefs do
911 if npropdef isa AAttrPropdef then
912 npropdef.check_expr(v, recv)
920 var count_type_test_tags: Array[String] = ["isa", "as", "auto", "covariance", "erasure"]
921 var count_type_test_resolved: HashMap[String, Int] = init_count_type_test_tags
922 var count_type_test_unresolved: HashMap[String, Int] = init_count_type_test_tags
923 var count_type_test_skipped: HashMap[String, Int] = init_count_type_test_tags
925 protected fun init_count_type_test_tags: HashMap[String, Int]
927 var res = new HashMap[String, Int]
928 for tag in count_type_test_tags do
934 # Display stats about compilation process
938 # * type tests against resolved types (`x
isa Collection[Animal]`)
939 # * type tests against unresolved types (`x
isa Collection[E
]`)
940 # * type tests skipped
944 if self.modelbuilder.toolcontext.opt_typing_test_metrics.value then
945 print "# static count_type_test"
946 print "\tresolved:\tunresolved\tskipped\ttotal"
947 var count_type_test_total = init_count_type_test_tags
948 count_type_test_resolved["total"] = 0
949 count_type_test_unresolved["total"] = 0
950 count_type_test_skipped["total"] = 0
951 count_type_test_total["total"] = 0
952 for tag in count_type_test_tags do
953 count_type_test_total[tag] = count_type_test_resolved[tag] + count_type_test_unresolved[tag] + count_type_test_skipped[tag]
954 count_type_test_resolved["total"] += count_type_test_resolved[tag]
955 count_type_test_unresolved["total"] += count_type_test_unresolved[tag]
956 count_type_test_skipped["total"] += count_type_test_skipped[tag]
957 count_type_test_total["total"] += count_type_test_total[tag]
959 var count_type_test = count_type_test_total["total"]
960 var tags = count_type_test_tags.to_a
964 printn "\t{count_type_test_resolved[tag]} ({div(count_type_test_resolved[tag],count_type_test)}%)"
965 printn "\t{count_type_test_unresolved[tag]} ({div(count_type_test_unresolved[tag],count_type_test)}%)"
966 printn "\t{count_type_test_skipped[tag]} ({div(count_type_test_skipped[tag],count_type_test)}%)"
967 printn "\t{count_type_test_total[tag]} ({div(count_type_test_total[tag],count_type_test)}%)"
973 fun finalize_ffi_for_module(mmodule: MModule) do mmodule.finalize_ffi(self)
976 # Avoid division by zero by returning the string "n/a"
977 fun div(a,b:Int):String
979 if b == 0 then return "n/a"
980 return ((a*10000/b).to_f / 100.0).to_precision(2)
984 # A file unit (may be more than one file if
985 # A file unit aim to be autonomous and is made or one or more `CodeWriter`s
988 var writers = new Array[CodeWriter]
989 var required_declarations = new HashSet[String]
992 # Where to store generated lines
995 var lines: List[String] = new List[String]
996 var decl_lines: List[String] = new List[String]
998 # Add a line in the main part of the generated C
999 fun add(s: String) do self.lines.add(s)
1002 # (used for local or global declaration)
1003 fun add_decl(s: String) do self.decl_lines.add(s)
1005 init(file: CodeFile)
1008 file.writers.add(self)
1012 # A visitor on the AST of property definition that generate the C code.
1013 abstract class AbstractCompilerVisitor
1015 type COMPILER: AbstractCompiler
1017 # The associated compiler
1018 var compiler: COMPILER
1020 # The current visited AST node
1021 var current_node: nullable ANode = null is writable
1023 # The current `Frame`
1024 var frame: nullable Frame is writable
1026 # Alias for self.compiler.mainmodule.object_type
1027 fun object_type: MClassType do return self.compiler.mainmodule.object_type
1029 # Alias for self.compiler.mainmodule.bool_type
1030 fun bool_type: MClassType do return self.compiler.mainmodule.bool_type
1032 var writer: CodeWriter
1034 init(compiler: COMPILER)
1036 self.compiler = compiler
1037 self.writer = new CodeWriter(compiler.files.last)
1040 # Force to get the primitive class named `name
` or abort
1041 fun get_class(name: String): MClass do return self.compiler.mainmodule.get_primitive_class(name)
1043 # Force to get the primitive property named `name
` in the instance `recv
` or abort
1044 fun get_property(name: String, recv: MType): MMethod
1046 assert recv isa MClassType
1047 return self.compiler.modelbuilder.force_get_primitive_method(self.current_node.as(not null), name, recv.mclass, self.compiler.mainmodule)
1050 fun compile_callsite(callsite: CallSite, arguments: Array[RuntimeVariable]): nullable RuntimeVariable
1052 var initializers = callsite.mpropdef.initializers
1053 if not initializers.is_empty then
1054 var recv = arguments.first
1056 assert initializers.length == arguments.length - 1 else debug("expected {initializers.length}, got {arguments.length - 1}")
1058 for p in initializers do
1059 if p isa MMethod then
1060 self.send(p, [recv, arguments[i]])
1061 else if p isa MAttribute then
1062 self.write_attribute(p, recv, arguments[i])
1067 return self.send(callsite.mproperty, [recv])
1070 return self.send(callsite.mproperty, arguments)
1073 fun native_array_instance(elttype: MType, length: RuntimeVariable): RuntimeVariable is abstract
1075 fun calloc_array(ret_type: MType, arguments: Array[RuntimeVariable]) is abstract
1077 fun native_array_def(pname: String, ret_type: nullable MType, arguments: Array[RuntimeVariable]) is abstract
1079 # Transform varargs, in raw arguments, into a single argument of type `Array`
1080 # Note: this method modify the given `args
`
1081 # If there is no vararg, then `args
` is not modified.
1082 fun varargize(mpropdef: MPropDef, msignature: MSignature, args: Array[RuntimeVariable])
1084 var recv = args.first
1085 var vararg_rank = msignature.vararg_rank
1086 if vararg_rank >= 0 then
1087 assert args.length >= msignature.arity + 1 # because of self
1089 args = new Array[RuntimeVariable]
1091 args.add(rawargs.first) # recv
1093 for i in [0..vararg_rank[ do
1094 args.add(rawargs[i+1])
1097 var vararg_lastrank = vararg_rank + rawargs.length-1-msignature.arity
1098 var vararg = new Array[RuntimeVariable]
1099 for i in [vararg_rank..vararg_lastrank] do
1100 vararg.add(rawargs[i+1])
1103 var elttype = msignature.mparameters[vararg_rank].mtype
1104 args.add(self.vararg_instance(mpropdef, recv, vararg, elttype))
1106 for i in [vararg_lastrank+1..rawargs.length-1[ do
1107 args.add(rawargs[i+1])
1110 rawargs.add_all(args)
1116 # Anchor a type to the main module and the current receiver
1117 fun anchor(mtype: MType): MType
1119 if not mtype.need_anchor then return mtype
1120 return mtype.anchor_to(self.compiler.mainmodule, self.frame.receiver)
1123 fun resolve_for(mtype: MType, recv: RuntimeVariable): MType
1125 if not mtype.need_anchor then return mtype
1126 return mtype.resolve_for(recv.mcasttype, self.frame.receiver, self.compiler.mainmodule, true)
1129 # Unsafely cast a value to a new type
1130 # ie the result share the same C variable but my have a different mcasttype
1131 # NOTE: if the adaptation is useless then `value
` is returned as it.
1132 # ENSURE: `result
.name
== value
.name
`
1133 fun autoadapt(value: RuntimeVariable, mtype: MType): RuntimeVariable
1135 mtype = self.anchor(mtype)
1136 var valmtype = value.mcasttype
1137 if valmtype.is_subtype(self.compiler.mainmodule, null, mtype) then
1141 if valmtype isa MNullableType and valmtype.mtype.is_subtype(self.compiler.mainmodule, null, mtype) then
1142 var res = new RuntimeVariable(value.name, valmtype, valmtype.mtype)
1145 var res = new RuntimeVariable(value.name, valmtype, mtype)
1150 # Generate a super call from a method definition
1151 fun supercall(m: MMethodDef, recvtype: MClassType, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1153 fun adapt_signature(m: MMethodDef, args: Array[RuntimeVariable]) is abstract
1155 # Box or unbox a value to another type iff a C type conversion is needed
1156 # ENSURE: `result
.mtype
.ctype
== mtype
.ctype
`
1157 fun autobox(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1159 # Generate a polymorphic subtype test
1160 fun type_test(value: RuntimeVariable, mtype: MType, tag: String): RuntimeVariable is abstract
1162 # Generate the code required to dynamically check if 2 objects share the same runtime type
1163 fun is_same_type_test(value1, value2: RuntimeVariable): RuntimeVariable is abstract
1165 # Generate a Nit "is" for two runtime_variables
1166 fun equal_test(value1, value2: RuntimeVariable): RuntimeVariable is abstract
1170 # Generate a static call on a method definition
1171 fun call(m: MMethodDef, recvtype: MClassType, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1173 # Generate a polymorphic send for the method `m
` and the arguments `args
`
1174 fun send(m: MMethod, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1176 # Generate a monomorphic send for the method `m
`, the type `t
` and the arguments `args
`
1177 fun monomorphic_send(m: MMethod, t: MType, args: Array[RuntimeVariable]): nullable RuntimeVariable
1179 assert t isa MClassType
1180 var propdef = m.lookup_first_definition(self.compiler.mainmodule, t)
1181 return self.call(propdef, t, args)
1184 # Generate a monomorphic super send from the method `m
`, the type `t
` and the arguments `args
`
1185 fun monomorphic_super_send(m: MMethodDef, t: MType, args: Array[RuntimeVariable]): nullable RuntimeVariable
1187 assert t isa MClassType
1188 m = m.lookup_next_definition(self.compiler.mainmodule, t)
1189 return self.call(m, t, args)
1192 # Attributes handling
1194 # Generate a polymorphic attribute is_set test
1195 fun isset_attribute(a: MAttribute, recv: RuntimeVariable): RuntimeVariable is abstract
1197 # Generate a polymorphic attribute read
1198 fun read_attribute(a: MAttribute, recv: RuntimeVariable): RuntimeVariable is abstract
1200 # Generate a polymorphic attribute write
1201 fun write_attribute(a: MAttribute, recv: RuntimeVariable, value: RuntimeVariable) is abstract
1205 # Add a check and an abort for a null reciever if needed
1206 fun check_recv_notnull(recv: RuntimeVariable)
1208 if self.compiler.modelbuilder.toolcontext.opt_no_check_null.value then return
1210 var maybenull = recv.mcasttype isa MNullableType or recv.mcasttype isa MNullType
1212 self.add("if (unlikely({recv} == NULL)) \{")
1213 self.add_abort("Receiver is null")
1220 private var names: HashSet[String] = new HashSet[String]
1221 private var last: Int = 0
1223 # Return a new name based on `s
` and unique in the visitor
1224 fun get_name(s: String): String
1226 if not self.names.has(s) then
1230 var i = self.last + 1
1233 if not self.names.has(s2) then
1242 # Return an unique and stable identifier associated with an escapemark
1243 fun escapemark_name(e: nullable EscapeMark): String
1246 if escapemark_names.has_key(e) then return escapemark_names[e]
1248 if name == null then name = "label"
1249 name = get_name(name)
1250 escapemark_names[e] = name
1254 private var escapemark_names = new HashMap[EscapeMark, String]
1256 # Return a "const char*" variable associated to the classname of the dynamic type of an object
1257 # NOTE: we do not return a `RuntimeVariable` "NativeString" as the class may not exist in the module/program
1258 fun class_name_string(value: RuntimeVariable): String is abstract
1260 # Variables handling
1262 protected var variables: HashMap[Variable, RuntimeVariable] = new HashMap[Variable, RuntimeVariable]
1264 # Return the local runtime_variable associated to a Nit local variable
1265 fun variable(variable: Variable): RuntimeVariable
1267 if self.variables.has_key(variable) then
1268 return self.variables[variable]
1270 var name = self.get_name("var_{variable.name}")
1271 var mtype = variable.declared_type.as(not null)
1272 mtype = self.anchor(mtype)
1273 var res = new RuntimeVariable(name, mtype, mtype)
1274 self.add_decl("{mtype.ctype} {name} /* var {variable}: {mtype} */;")
1275 self.variables[variable] = res
1280 # Return a new uninitialized local runtime_variable
1281 fun new_var(mtype: MType): RuntimeVariable
1283 mtype = self.anchor(mtype)
1284 var name = self.get_name("var")
1285 var res = new RuntimeVariable(name, mtype, mtype)
1286 self.add_decl("{mtype.ctype} {name} /* : {mtype} */;")
1290 # Return a new uninitialized named runtime_variable
1291 fun new_named_var(mtype: MType, name: String): RuntimeVariable
1293 mtype = self.anchor(mtype)
1294 var res = new RuntimeVariable(name, mtype, mtype)
1295 self.add_decl("{mtype.ctype} {name} /* : {mtype} */;")
1299 # Correctly assign a left and a right value
1300 # Boxing and unboxing is performed if required
1301 fun assign(left, right: RuntimeVariable)
1303 right = self.autobox(right, left.mtype)
1304 self.add("{left} = {right};")
1307 # Generate instances
1309 # Generate a alloc-instance + init-attributes
1310 fun init_instance(mtype: MClassType): RuntimeVariable is abstract
1312 # Set a GC finalizer on `recv
`, only if `recv
` isa Finalizable
1313 fun set_finalizer(recv: RuntimeVariable)
1315 var mtype = recv.mtype
1316 var finalizable_type = compiler.mainmodule.finalizable_type
1317 if finalizable_type != null and not mtype.need_anchor and
1318 mtype.is_subtype(compiler.mainmodule, null, finalizable_type) then
1319 add "gc_register_finalizer({recv});"
1323 # Generate an integer value
1324 fun int_instance(value: Int): RuntimeVariable
1326 var res = self.new_var(self.get_class("Int").mclass_type)
1327 self.add("{res} = {value};")
1331 # Generate a string value
1332 fun string_instance(string: String): RuntimeVariable
1334 var mtype = self.get_class("String").mclass_type
1335 var name = self.get_name("varonce")
1336 self.add_decl("static {mtype.ctype} {name};")
1337 var res = self.new_var(mtype)
1338 self.add("if ({name}) \{")
1339 self.add("{res} = {name};")
1340 self.add("\} else \{")
1341 var native_mtype = self.get_class("NativeString").mclass_type
1342 var nat = self.new_var(native_mtype)
1343 self.add("{nat} = \"{string.escape_to_c}\";")
1344 var length = self.int_instance(string.length)
1345 self.add("{res} = {self.send(self.get_property("to_s_with_length", native_mtype), [nat, length]).as(not null)};")
1346 self.add("{name} = {res};")
1351 # Generate an array value
1352 fun array_instance(array: Array[RuntimeVariable], elttype: MType): RuntimeVariable is abstract
1354 # Get an instance of a array for a vararg
1355 fun vararg_instance(mpropdef: MPropDef, recv: RuntimeVariable, varargs: Array[RuntimeVariable], elttype: MType): RuntimeVariable is abstract
1359 # Add a line in the main part of the generated C
1360 fun add(s: String) do self.writer.lines.add(s)
1363 # (used for local or global declaration)
1364 fun add_decl(s: String) do self.writer.decl_lines.add(s)
1366 # Request the presence of a global declaration
1367 fun require_declaration(key: String)
1369 var reqs = self.writer.file.required_declarations
1370 if reqs.has(key) then return
1372 var node = current_node
1373 if node != null then compiler.requirers_of_declarations[key] = node
1376 # Add a declaration in the local-header
1377 # The declaration is ensured to be present once
1378 fun declare_once(s: String)
1380 self.compiler.provide_declaration(s, s)
1381 self.require_declaration(s)
1384 # look for a needed .h and .c file for a given .nit source-file
1385 # FIXME: bad API, parameter should be a `MModule`, not its source-file
1386 fun add_extern(file: String)
1388 file = file.strip_extension(".nit")
1389 var tryfile = file + ".nit.h"
1390 if tryfile.file_exists then
1391 self.declare_once("#include \"{tryfile.basename("")}\"")
1392 self.compiler.files_to_copy.add(tryfile)
1394 tryfile = file + "_nit.h"
1395 if tryfile.file_exists then
1396 self.declare_once("#include \"{tryfile.basename("")}\"")
1397 self.compiler.files_to_copy.add(tryfile)
1400 if self.compiler.seen_extern.has(file) then return
1401 self.compiler.seen_extern.add(file)
1402 tryfile = file + ".nit.c"
1403 if not tryfile.file_exists then
1404 tryfile = file + "_nit.c"
1405 if not tryfile.file_exists then return
1407 var f = new ExternCFile(tryfile.basename(""), "")
1408 self.compiler.extern_bodies.add(f)
1409 self.compiler.files_to_copy.add(tryfile)
1412 # Return a new local runtime_variable initialized with the C expression `cexpr
`.
1413 fun new_expr(cexpr: String, mtype: MType): RuntimeVariable
1415 var res = new_var(mtype)
1416 self.add("{res} = {cexpr};")
1420 # Generate generic abort
1421 # used by aborts, asserts, casts, etc.
1422 fun add_abort(message: String)
1424 self.add("PRINT_ERROR(\"Runtime error: %s\", \"{message.escape_to_c}\");")
1430 if self.current_node != null and self.current_node.location.file != null then
1431 self.add("PRINT_ERROR(\" (%s:%d)\\n\", \"{self.current_node.location.file.filename.escape_to_c}\", {current_node.location.line_start});")
1433 self.add("PRINT_ERROR(\"\\n\");")
1435 self.add("show_backtrace(1);")
1438 # Add a dynamic cast
1439 fun add_cast(value: RuntimeVariable, mtype: MType, tag: String)
1441 var res = self.type_test(value, mtype, tag)
1442 self.add("if (unlikely(!{res})) \{")
1443 var cn = self.class_name_string(value)
1444 self.add("PRINT_ERROR(\"Runtime error: Cast failed. Expected `%s
`, got `%s
`\", \"{mtype.to_s.escape_to_c}\", {cn});")
1449 # Generate a return with the value `s
`
1450 fun ret(s: RuntimeVariable)
1452 self.assign(self.frame.returnvar.as(not null), s)
1453 self.add("goto {self.frame.returnlabel.as(not null)};")
1456 # Compile a statement (if any)
1457 fun stmt(nexpr: nullable AExpr)
1459 if nexpr == null then return
1460 var old = self.current_node
1461 self.current_node = nexpr
1463 self.current_node = old
1466 # Compile an expression an return its result
1467 # `mtype
` is the expected return type, pass null if no specific type is expected.
1468 fun expr(nexpr: AExpr, mtype: nullable MType): RuntimeVariable
1470 var old = self.current_node
1471 self.current_node = nexpr
1472 var res = nexpr.expr(self).as(not null)
1473 if mtype != null then
1474 mtype = self.anchor(mtype)
1475 res = self.autobox(res, mtype)
1477 res = autoadapt(res, nexpr.mtype.as(not null))
1478 var implicit_cast_to = nexpr.implicit_cast_to
1479 if implicit_cast_to != null and not self.compiler.modelbuilder.toolcontext.opt_no_check_autocast.value then
1480 add_cast(res, implicit_cast_to, "auto")
1481 res = autoadapt(res, implicit_cast_to)
1483 self.current_node = old
1487 # Alias for `self.expr
(nexpr
, self.bool_type
)`
1488 fun expr_bool(nexpr: AExpr): RuntimeVariable do return expr(nexpr, bool_type)
1490 # Safely show a debug message on the current node and repeat the message in the C code as a comment
1491 fun debug(message: String)
1493 var node = self.current_node
1494 if node == null then
1495 print "?: {message}"
1499 self.add("/* DEBUG: {message} */")
1503 # A C function associated to a Nit method
1504 # Because of customization, a given Nit method can be compiler more that once
1505 abstract class AbstractRuntimeFunction
1507 type COMPILER: AbstractCompiler
1508 type VISITOR: AbstractCompilerVisitor
1510 # The associated Nit method
1511 var mmethoddef: MMethodDef
1513 # The mangled c name of the runtime_function
1514 # Subclasses should redefine `build_c_name
` instead
1517 var res = self.c_name_cache
1518 if res != null then return res
1519 res = self.build_c_name
1520 self.c_name_cache = res
1524 # Non cached version of `c_name
`
1525 protected fun build_c_name: String is abstract
1527 protected var c_name_cache: nullable String = null is writable
1529 # Implements a call of the runtime_function
1530 # May inline the body or generate a C function call
1531 fun call(v: VISITOR, arguments: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1533 # Generate the code for the `AbstractRuntimeFunction`
1534 # Warning: compile more than once compilation makes CC unhappy
1535 fun compile_to_c(compiler: COMPILER) is abstract
1538 # A runtime variable hold a runtime value in C.
1539 # Runtime variables are associated to Nit local variables and intermediate results in Nit expressions.
1541 # The tricky point is that a single C variable can be associated to more than one `RuntimeVariable` because the static knowledge of the type of an expression can vary in the C code.
1542 class RuntimeVariable
1543 # The name of the variable in the C code
1546 # The static type of the variable (as declard in C)
1549 # The current casted type of the variable (as known in Nit)
1550 var mcasttype: MType is writable
1552 # If the variable exaclty a mcasttype?
1553 # false (usual value) means that the variable is a mcasttype or a subtype.
1554 var is_exact: Bool = false is writable
1556 init(name: String, mtype: MType, mcasttype: MType)
1560 self.mcasttype = mcasttype
1561 assert not mtype.need_anchor
1562 assert not mcasttype.need_anchor
1565 redef fun to_s do return name
1570 if self.is_exact then
1571 exact_str = " exact"
1576 if self.mtype == self.mcasttype then
1577 type_str = "{mtype}{exact_str}"
1579 type_str = "{mtype}({mcasttype}{exact_str})"
1581 return "<{name}:{type_str}>"
1585 # A frame correspond to a visited property in a `GlobalCompilerVisitor`
1588 type VISITOR: AbstractCompilerVisitor
1590 # The associated visitor
1591 var visitor: VISITOR
1593 # The executed property.
1594 # A Method in case of a call, an attribute in case of a default initialization.
1595 var mpropdef: MPropDef
1597 # The static type of the receiver
1598 var receiver: MClassType
1600 # Arguments of the method (the first is the receiver)
1601 var arguments: Array[RuntimeVariable]
1603 # The runtime_variable associated to the return (in a function)
1604 var returnvar: nullable RuntimeVariable = null is writable
1606 # The label at the end of the property
1607 var returnlabel: nullable String = null is writable
1611 # Return the C type associated to a given Nit static type
1612 fun ctype: String do return "val*"
1614 fun ctypename: String do return "val"
1616 # Return the name of the C structure associated to a Nit live type
1617 fun c_name: String is abstract
1618 protected var c_name_cache: nullable String is protected writable
1621 redef class MClassType
1624 var res = self.c_name_cache
1625 if res != null then return res
1626 res = "{mclass.intro_mmodule.name.to_cmangle}__{mclass.name.to_cmangle}"
1627 self.c_name_cache = res
1631 redef fun ctype: String
1633 if mclass.name == "Int" then
1635 else if mclass.name == "Bool" then
1637 else if mclass.name == "Char" then
1639 else if mclass.name == "Float" then
1641 else if mclass.name == "NativeString" then
1643 else if mclass.name == "NativeArray" then
1645 else if mclass.kind == extern_kind then
1652 redef fun ctypename: String
1654 if mclass.name == "Int" then
1656 else if mclass.name == "Bool" then
1658 else if mclass.name == "Char" then
1660 else if mclass.name == "Float" then
1662 else if mclass.name == "NativeString" then
1664 else if mclass.name == "NativeArray" then
1665 #return "{self.arguments.first.ctype}*"
1667 else if mclass.kind == extern_kind then
1675 redef class MGenericType
1678 var res = self.c_name_cache
1679 if res != null then return res
1681 for t in self.arguments do
1682 res = res + t.c_name
1684 self.c_name_cache = res
1689 redef class MParameterType
1692 var res = self.c_name_cache
1693 if res != null then return res
1694 res = "{self.mclass.c_name}_FT{self.rank}"
1695 self.c_name_cache = res
1700 redef class MVirtualType
1703 var res = self.c_name_cache
1704 if res != null then return res
1705 res = "{self.mproperty.intro.mclassdef.mclass.c_name}_VT{self.mproperty.name}"
1706 self.c_name_cache = res
1711 redef class MNullableType
1714 var res = self.c_name_cache
1715 if res != null then return res
1716 res = "nullable_{self.mtype.c_name}"
1717 self.c_name_cache = res
1723 # Return the name of the C structure associated to a Nit class
1724 fun c_name: String do
1725 var res = self.c_name_cache
1726 if res != null then return res
1727 res = "{intro_mmodule.name.to_cmangle}__{name.to_cmangle}"
1728 self.c_name_cache = res
1731 private var c_name_cache: nullable String
1734 redef class MProperty
1735 fun c_name: String do
1736 var res = self.c_name_cache
1737 if res != null then return res
1738 res = "{self.intro.c_name}"
1739 self.c_name_cache = res
1742 private var c_name_cache: nullable String
1745 redef class MPropDef
1746 type VISITOR: AbstractCompilerVisitor
1748 private var c_name_cache: nullable String
1750 # The mangled name associated to the property
1753 var res = self.c_name_cache
1754 if res != null then return res
1755 res = "{self.mclassdef.mmodule.name.to_cmangle}__{self.mclassdef.mclass.name.to_cmangle}__{self.mproperty.name.to_cmangle}"
1756 self.c_name_cache = res
1761 redef class MMethodDef
1762 # Can the body be inlined?
1763 fun can_inline(v: VISITOR): Bool
1765 if is_abstract then return true
1766 var modelbuilder = v.compiler.modelbuilder
1767 if modelbuilder.mpropdef2npropdef.has_key(self) then
1768 var npropdef = modelbuilder.mpropdef2npropdef[self]
1769 return npropdef.can_inline
1770 else if self.mproperty.name == "init" then
1771 # Automatic free init is always inlined since it is empty or contains only attribtes assigments
1778 # Inline the body in another visitor
1779 fun compile_inside_to_c(v: VISITOR, arguments: Array[RuntimeVariable]): nullable RuntimeVariable
1781 var modelbuilder = v.compiler.modelbuilder
1782 if modelbuilder.mpropdef2npropdef.has_key(self) then
1783 var npropdef = modelbuilder.mpropdef2npropdef[self]
1784 var oldnode = v.current_node
1785 v.current_node = npropdef
1786 self.compile_parameter_check(v, arguments)
1787 npropdef.compile_to_c(v, self, arguments)
1788 v.current_node = oldnode
1789 else if self.mproperty.name == "init" then
1790 var nclassdef = modelbuilder.mclassdef2nclassdef[self.mclassdef]
1791 var oldnode = v.current_node
1792 v.current_node = nclassdef
1793 self.compile_parameter_check(v, arguments)
1794 nclassdef.compile_to_c(v, self, arguments)
1795 v.current_node = oldnode
1802 # Generate type checks in the C code to check covariant parameters
1803 fun compile_parameter_check(v: VISITOR, arguments: Array[RuntimeVariable])
1805 if v.compiler.modelbuilder.toolcontext.opt_no_check_covariance.value then return
1807 for i in [0..msignature.arity[ do
1808 # skip test for vararg since the array is instantiated with the correct polymorphic type
1809 if msignature.vararg_rank == i then continue
1811 # skip if the cast is not required
1812 var origmtype = self.mproperty.intro.msignature.mparameters[i].mtype
1813 if not origmtype.need_anchor then continue
1815 # get the parameter type
1816 var mtype = self.msignature.mparameters[i].mtype
1819 # note that v decides if and how to implements the cast
1820 v.add("/* Covariant cast for argument {i} ({self.msignature.mparameters[i].name}) {arguments[i+1].inspect} isa {mtype} */")
1821 v.add_cast(arguments[i+1], mtype, "covariance")
1828 redef class APropdef
1829 fun compile_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
1831 v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name} {mpropdef} at {location.to_s}\\n\");")
1832 debug("Not yet implemented")
1835 fun can_inline: Bool do return true
1838 redef class AMethPropdef
1839 redef fun compile_to_c(v, mpropdef, arguments)
1841 if mpropdef.is_abstract then
1842 var cn = v.class_name_string(arguments.first)
1843 v.add("PRINT_ERROR(\"Runtime error: Abstract method `%s
` called on `%s
`\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
1848 # Call the implicit super-init
1849 var auto_super_inits = self.auto_super_inits
1850 if auto_super_inits != null then
1851 var args = [arguments.first]
1852 for auto_super_init in auto_super_inits do
1853 assert auto_super_init.mproperty != mpropdef.mproperty
1855 for i in [0..auto_super_init.msignature.arity+1[ do
1856 args.add(arguments[i])
1858 assert auto_super_init.mproperty != mpropdef.mproperty
1859 v.compile_callsite(auto_super_init, args)
1862 if auto_super_call then
1863 v.supercall(mpropdef, arguments.first.mtype.as(MClassType), arguments)
1866 # Try special compilation
1867 if mpropdef.is_intern then
1868 if compile_intern_to_c(v, mpropdef, arguments) then return
1869 else if mpropdef.is_extern then
1870 if mpropdef.mproperty.is_init then
1871 if compile_externinit_to_c(v, mpropdef, arguments) then return
1873 if compile_externmeth_to_c(v, mpropdef, arguments) then return
1877 # Compile block if any
1878 var n_block = n_block
1879 if n_block != null then
1880 for i in [0..mpropdef.msignature.arity[ do
1881 var variable = self.n_signature.n_params[i].variable.as(not null)
1882 v.assign(v.variable(variable), arguments[i+1])
1889 var cn = v.class_name_string(arguments.first)
1890 v.add("PRINT_ERROR(\"Runtime error: uncompiled method `%s
` called on `%s
`. NOT YET IMPLEMENTED\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
1894 redef fun can_inline
1896 if self.auto_super_inits != null then return false
1897 var nblock = self.n_block
1898 if nblock == null then return true
1899 if (mpropdef.mproperty.name == "==" or mpropdef.mproperty.name == "!=") and mpropdef.mclassdef.mclass.name == "Object" then return true
1900 if nblock isa ABlockExpr and nblock.n_expr.length == 0 then return true
1904 fun compile_intern_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
1906 var pname = mpropdef.mproperty.name
1907 var cname = mpropdef.mclassdef.mclass.name
1908 var ret = mpropdef.msignature.return_mtype
1910 ret = v.resolve_for(ret, arguments.first)
1911 else if mpropdef.mproperty.is_new then
1912 ret = arguments.first.mcasttype
1914 if pname != "==" and pname != "!=" then
1915 v.adapt_signature(mpropdef, arguments)
1917 if cname == "Int" then
1918 if pname == "output" then
1919 v.add("printf(\"%ld\\n\", {arguments.first});")
1921 else if pname == "object_id" then
1922 v.ret(arguments.first)
1924 else if pname == "+" then
1925 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
1927 else if pname == "-" then
1928 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
1930 else if pname == "unary -" then
1931 v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
1933 else if pname == "*" then
1934 v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
1936 else if pname == "/" then
1937 v.ret(v.new_expr("{arguments[0]} / {arguments[1]}", ret.as(not null)))
1939 else if pname == "%" then
1940 v.ret(v.new_expr("{arguments[0]} % {arguments[1]}", ret.as(not null)))
1942 else if pname == "lshift" then
1943 v.ret(v.new_expr("{arguments[0]} << {arguments[1]}", ret.as(not null)))
1945 else if pname == "rshift" then
1946 v.ret(v.new_expr("{arguments[0]} >> {arguments[1]}", ret.as(not null)))
1948 else if pname == "==" then
1949 v.ret(v.equal_test(arguments[0], arguments[1]))
1951 else if pname == "!=" then
1952 var res = v.equal_test(arguments[0], arguments[1])
1953 v.ret(v.new_expr("!{res}", ret.as(not null)))
1955 else if pname == "<" then
1956 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
1958 else if pname == ">" then
1959 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
1961 else if pname == "<=" then
1962 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
1964 else if pname == ">=" then
1965 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
1967 else if pname == "to_f" then
1968 v.ret(v.new_expr("(double){arguments[0]}", ret.as(not null)))
1970 else if pname == "ascii" then
1971 v.ret(v.new_expr("{arguments[0]}", ret.as(not null)))
1974 else if cname == "Char" then
1975 if pname == "output" then
1976 v.add("printf(\"%c\", {arguments.first});")
1978 else if pname == "object_id" then
1979 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
1981 else if pname == "successor" then
1982 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
1984 else if pname == "predecessor" then
1985 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
1987 else if pname == "==" then
1988 v.ret(v.equal_test(arguments[0], arguments[1]))
1990 else if pname == "!=" then
1991 var res = v.equal_test(arguments[0], arguments[1])
1992 v.ret(v.new_expr("!{res}", ret.as(not null)))
1994 else if pname == "<" then
1995 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
1997 else if pname == ">" then
1998 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2000 else if pname == "<=" then
2001 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2003 else if pname == ">=" then
2004 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2006 else if pname == "to_i" then
2007 v.ret(v.new_expr("{arguments[0]}-'0'", ret.as(not null)))
2009 else if pname == "ascii" then
2010 v.ret(v.new_expr("(unsigned char){arguments[0]}", ret.as(not null)))
2013 else if cname == "Bool" then
2014 if pname == "output" then
2015 v.add("printf({arguments.first}?\"true\\n\":\"false\\n\");")
2017 else if pname == "object_id" then
2018 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2020 else if pname == "==" then
2021 v.ret(v.equal_test(arguments[0], arguments[1]))
2023 else if pname == "!=" then
2024 var res = v.equal_test(arguments[0], arguments[1])
2025 v.ret(v.new_expr("!{res}", ret.as(not null)))
2028 else if cname == "Float" then
2029 if pname == "output" then
2030 v.add("printf(\"%f\\n\", {arguments.first});")
2032 else if pname == "object_id" then
2033 v.ret(v.new_expr("(double){arguments.first}", ret.as(not null)))
2035 else if pname == "+" then
2036 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2038 else if pname == "-" then
2039 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2041 else if pname == "unary -" then
2042 v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
2044 else if pname == "succ" then
2045 v.ret(v.new_expr("{arguments[0]}+1", ret.as(not null)))
2047 else if pname == "prec" then
2048 v.ret(v.new_expr("{arguments[0]}-1", ret.as(not null)))
2050 else if pname == "*" then
2051 v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
2053 else if pname == "/" then
2054 v.ret(v.new_expr("{arguments[0]} / {arguments[1]}", ret.as(not null)))
2056 else if pname == "==" then
2057 v.ret(v.equal_test(arguments[0], arguments[1]))
2059 else if pname == "!=" then
2060 var res = v.equal_test(arguments[0], arguments[1])
2061 v.ret(v.new_expr("!{res}", ret.as(not null)))
2063 else if pname == "<" then
2064 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2066 else if pname == ">" then
2067 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2069 else if pname == "<=" then
2070 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2072 else if pname == ">=" then
2073 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2075 else if pname == "to_i" then
2076 v.ret(v.new_expr("(long){arguments[0]}", ret.as(not null)))
2079 else if cname == "NativeString" then
2080 if pname == "[]" then
2081 v.ret(v.new_expr("{arguments[0]}[{arguments[1]}]", ret.as(not null)))
2083 else if pname == "[]=" then
2084 v.add("{arguments[0]}[{arguments[1]}]={arguments[2]};")
2086 else if pname == "copy_to" then
2087 v.add("memmove({arguments[1]}+{arguments[4]},{arguments[0]}+{arguments[3]},{arguments[2]});")
2089 else if pname == "atoi" then
2090 v.ret(v.new_expr("atoi({arguments[0]});", ret.as(not null)))
2092 else if pname == "init" then
2093 v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
2096 else if cname == "NativeArray" then
2097 v.native_array_def(pname, ret, arguments)
2100 if pname == "exit" then
2101 v.add("exit({arguments[1]});")
2103 else if pname == "sys" then
2104 v.ret(v.new_expr("glob_sys", ret.as(not null)))
2106 else if pname == "calloc_string" then
2107 v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
2109 else if pname == "calloc_array" then
2110 v.calloc_array(ret.as(not null), arguments)
2112 else if pname == "object_id" then
2113 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2115 else if pname == "is_same_type" then
2116 v.ret(v.is_same_type_test(arguments[0], arguments[1]))
2118 else if pname == "is_same_instance" then
2119 v.ret(v.equal_test(arguments[0], arguments[1]))
2121 else if pname == "output_class_name" then
2122 var nat = v.class_name_string(arguments.first)
2123 v.add("printf(\"%s\\n\", {nat});")
2125 else if pname == "native_class_name" then
2126 var nat = v.class_name_string(arguments.first)
2127 v.ret(v.new_expr("(char*){nat}", ret.as(not null)))
2129 else if pname == "force_garbage_collection" then
2130 v.add("nit_gcollect();")
2132 else if pname == "native_argc" then
2133 v.ret(v.new_expr("glob_argc", ret.as(not null)))
2135 else if pname == "native_argv" then
2136 v.ret(v.new_expr("glob_argv[{arguments[1]}]", ret.as(not null)))
2142 # Compile an extern method
2143 # Return `true` if the compilation was successful, `false` if a fall-back is needed
2144 fun compile_externmeth_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2147 var at = self.get_single_annotation("extern", v.compiler.modelbuilder)
2149 externname = at.arg_as_string(v.compiler.modelbuilder)
2150 if externname == null then return false
2152 var nextern = self.n_extern
2153 if nextern == null then return false
2154 externname = nextern.text.substring(1, nextern.text.length-2)
2156 if location.file != null then
2157 var file = location.file.filename
2160 var res: nullable RuntimeVariable = null
2161 var ret = mpropdef.msignature.return_mtype
2163 ret = v.resolve_for(ret, arguments.first)
2164 res = v.new_var(ret)
2166 v.adapt_signature(mpropdef, arguments)
2169 v.add("{externname}({arguments.join(", ")});")
2171 v.add("{res} = {externname}({arguments.join(", ")});")
2177 # Compile an extern factory
2178 # Return `true` if the compilation was successful, `false` if a fall-back is needed
2179 fun compile_externinit_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2182 var at = self.get_single_annotation("extern", v.compiler.modelbuilder)
2184 externname = at.arg_as_string(v.compiler.modelbuilder)
2185 if externname == null then return false
2187 var nextern = self.n_extern
2188 if nextern == null then return false
2189 externname = nextern.text.substring(1, nextern.text.length-2)
2191 if location.file != null then
2192 var file = location.file.filename
2195 v.adapt_signature(mpropdef, arguments)
2196 var ret = arguments.first.mtype
2197 var res = v.new_var(ret)
2201 v.add("{res} = {externname}({arguments.join(", ")});")
2207 redef class AAttrPropdef
2208 redef fun compile_to_c(v, mpropdef, arguments)
2210 if mpropdef == mreadpropdef then
2211 assert arguments.length == 1
2215 assert nexpr != null
2217 var ret = self.mpropdef.static_mtype
2218 var useiset = ret.ctype == "val*" and not ret isa MNullableType
2219 var guard = self.mlazypropdef.mproperty
2221 set = v.isset_attribute(self.mpropdef.mproperty, arguments.first)
2223 set = v.read_attribute(guard, arguments.first)
2225 v.add("if(likely({set})) \{")
2226 res = v.read_attribute(self.mpropdef.mproperty, arguments.first)
2228 var value = v.expr(nexpr, self.mpropdef.static_mtype)
2229 v.write_attribute(self.mpropdef.mproperty, arguments.first, value)
2230 v.assign(res, value)
2232 var true_v = v.new_expr("1", v.bool_type)
2233 v.write_attribute(guard, arguments.first, true_v)
2237 res = v.read_attribute(self.mpropdef.mproperty, arguments.first)
2239 v.assign(v.frame.returnvar.as(not null), res)
2240 else if mpropdef == mwritepropdef then
2241 assert arguments.length == 2
2242 v.write_attribute(self.mpropdef.mproperty, arguments.first, arguments[1])
2244 var ret = self.mpropdef.static_mtype
2245 var useiset = ret.ctype == "val*" and not ret isa MNullableType
2247 v.write_attribute(self.mlazypropdef.mproperty, arguments.first, v.new_expr("1", v.bool_type))
2255 fun init_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable)
2257 var nexpr = self.n_expr
2258 if nexpr != null and not is_lazy then
2259 var oldnode = v.current_node
2260 v.current_node = self
2261 var old_frame = v.frame
2262 var frame = new Frame(v, self.mpropdef.as(not null), recv.mtype.as(MClassType), [recv])
2264 var value = v.expr(nexpr, self.mpropdef.static_mtype)
2265 v.write_attribute(self.mpropdef.mproperty, recv, value)
2267 v.current_node = oldnode
2271 fun check_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable)
2273 var nexpr = self.n_expr
2274 if nexpr != null then return
2276 var oldnode = v.current_node
2277 v.current_node = self
2278 var old_frame = v.frame
2279 var frame = new Frame(v, self.mpropdef.as(not null), recv.mtype.as(MClassType), [recv])
2281 # Force read to check the initialization
2282 v.read_attribute(self.mpropdef.mproperty, recv)
2284 v.current_node = oldnode
2288 redef class AClassdef
2289 private fun compile_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
2291 if mpropdef == self.mfree_init then
2292 if mpropdef.mproperty.is_root_init then
2293 assert self.super_inits == null
2294 assert arguments.length == 1
2295 if not mpropdef.is_intro then
2296 v.supercall(mpropdef, arguments.first.mtype.as(MClassType), arguments)
2301 var super_inits = self.super_inits
2302 if super_inits != null then
2303 var args_of_super = arguments
2304 if arguments.length > 1 then args_of_super = [arguments.first]
2305 for su in super_inits do
2306 v.send(su, args_of_super)
2310 var recv = arguments.first
2312 # Collect undefined attributes
2313 for npropdef in self.n_propdefs do
2314 if npropdef isa AAttrPropdef and npropdef.n_expr == null and not npropdef.noinit then
2315 v.write_attribute(npropdef.mpropdef.mproperty, recv, arguments[i])
2326 # Try to compile self as an expression
2327 # Do not call this method directly, use `v
.expr
` instead
2328 private fun expr(v: AbstractCompilerVisitor): nullable RuntimeVariable
2330 v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name}:{location.to_s}\\n\");")
2331 var mtype = self.mtype
2332 if mtype == null then
2335 var res = v.new_var(mtype)
2336 v.add("/* {res} = NOT YET {class_name} */")
2341 # Try to compile self as a statement
2342 # Do not call this method directly, use `v
.stmt
` instead
2343 private fun stmt(v: AbstractCompilerVisitor)
2346 if res != null then v.add("{res};")
2350 redef class ABlockExpr
2353 for e in self.n_expr do v.stmt(e)
2357 var last = self.n_expr.last
2358 for e in self.n_expr do
2359 if e == last then break
2362 return v.expr(last, null)
2366 redef class AVardeclExpr
2369 var variable = self.variable.as(not null)
2370 var ne = self.n_expr
2372 var i = v.expr(ne, variable.declared_type)
2373 v.assign(v.variable(variable), i)
2378 redef class AVarExpr
2381 var res = v.variable(self.variable.as(not null))
2382 var mtype = self.mtype.as(not null)
2383 return v.autoadapt(res, mtype)
2387 redef class AVarAssignExpr
2390 var variable = self.variable.as(not null)
2391 var i = v.expr(self.n_value, variable.declared_type)
2392 v.assign(v.variable(variable), i)
2396 var variable = self.variable.as(not null)
2397 var i = v.expr(self.n_value, variable.declared_type)
2398 v.assign(v.variable(variable), i)
2403 redef class AVarReassignExpr
2406 var variable = self.variable.as(not null)
2407 var vari = v.variable(variable)
2408 var value = v.expr(self.n_value, variable.declared_type)
2409 var res = v.compile_callsite(self.reassign_callsite.as(not null), [vari, value])
2411 v.assign(v.variable(variable), res)
2415 redef class ASelfExpr
2416 redef fun expr(v) do return v.frame.arguments.first
2419 redef class AContinueExpr
2420 redef fun stmt(v) do v.add("goto CONTINUE_{v.escapemark_name(self.escapemark)};")
2423 redef class ABreakExpr
2424 redef fun stmt(v) do v.add("goto BREAK_{v.escapemark_name(self.escapemark)};")
2427 redef class AReturnExpr
2430 var nexpr = self.n_expr
2431 if nexpr != null then
2432 var returnvar = v.frame.returnvar.as(not null)
2433 var i = v.expr(nexpr, returnvar.mtype)
2434 v.assign(returnvar, i)
2436 v.add("goto {v.frame.returnlabel.as(not null)};")
2440 redef class AAbortExpr
2441 redef fun stmt(v) do v.add_abort("Aborted")
2447 var cond = v.expr_bool(self.n_expr)
2448 v.add("if ({cond})\{")
2457 var res = v.new_var(self.mtype.as(not null))
2458 var cond = v.expr_bool(self.n_expr)
2459 v.add("if ({cond})\{")
2460 v.assign(res, v.expr(self.n_then.as(not null), null))
2462 v.assign(res, v.expr(self.n_else.as(not null), null))
2468 redef class AIfexprExpr
2471 var res = v.new_var(self.mtype.as(not null))
2472 var cond = v.expr_bool(self.n_expr)
2473 v.add("if ({cond})\{")
2474 v.assign(res, v.expr(self.n_then, null))
2476 v.assign(res, v.expr(self.n_else, null))
2485 v.stmt(self.n_block)
2486 var escapemark = self.escapemark
2487 if escapemark != null then
2488 v.add("BREAK_{v.escapemark_name(escapemark)}: (void)0;")
2493 redef class AWhileExpr
2497 var cond = v.expr_bool(self.n_expr)
2498 v.add("if (!{cond}) break;")
2499 v.stmt(self.n_block)
2500 v.add("CONTINUE_{v.escapemark_name(escapemark)}: (void)0;")
2502 v.add("BREAK_{v.escapemark_name(escapemark)}: (void)0;")
2506 redef class ALoopExpr
2510 v.stmt(self.n_block)
2511 v.add("CONTINUE_{v.escapemark_name(escapemark)}: (void)0;")
2513 v.add("BREAK_{v.escapemark_name(escapemark)}: (void)0;")
2517 redef class AForExpr
2520 # Shortcut on explicit range
2521 # Avoid the instantiation of the range and the iterator
2522 var nexpr = self.n_expr
2523 if self.variables.length == 1 and nexpr isa ARangeExpr and not v.compiler.modelbuilder.toolcontext.opt_no_shortcut_range.value then
2524 var from = v.expr(nexpr.n_expr, null)
2525 var to = v.expr(nexpr.n_expr2, null)
2526 var variable = v.variable(variables.first)
2527 var one = v.new_expr("1", v.get_class("Int").mclass_type)
2529 v.assign(variable, from)
2530 v.add("for(;;) \{ /* shortcut range */")
2533 if nexpr isa AOrangeExpr then
2534 ok = v.send(v.get_property("<", variable.mtype), [variable, to])
2536 ok = v.send(v.get_property("<=", variable.mtype), [variable, to])
2539 v.add("if(!{ok}) break;")
2541 v.stmt(self.n_block)
2543 v.add("CONTINUE_{v.escapemark_name(escapemark)}: (void)0;")
2544 var succ = v.send(v.get_property("successor", variable.mtype), [variable, one])
2546 v.assign(variable, succ)
2548 v.add("BREAK_{v.escapemark_name(escapemark)}: (void)0;")
2552 var cl = v.expr(self.n_expr, null)
2553 var it_meth = self.method_iterator
2554 assert it_meth != null
2555 var it = v.compile_callsite(it_meth, [cl])
2558 var isok_meth = self.method_is_ok
2559 assert isok_meth != null
2560 var ok = v.compile_callsite(isok_meth, [it])
2562 v.add("if(!{ok}) break;")
2563 if self.variables.length == 1 then
2564 var item_meth = self.method_item
2565 assert item_meth != null
2566 var i = v.compile_callsite(item_meth, [it])
2568 v.assign(v.variable(variables.first), i)
2569 else if self.variables.length == 2 then
2570 var key_meth = self.method_key
2571 assert key_meth != null
2572 var i = v.compile_callsite(key_meth, [it])
2574 v.assign(v.variable(variables[0]), i)
2575 var item_meth = self.method_item
2576 assert item_meth != null
2577 i = v.compile_callsite(item_meth, [it])
2579 v.assign(v.variable(variables[1]), i)
2583 v.stmt(self.n_block)
2584 v.add("CONTINUE_{v.escapemark_name(escapemark)}: (void)0;")
2585 var next_meth = self.method_next
2586 assert next_meth != null
2587 v.compile_callsite(next_meth, [it])
2589 v.add("BREAK_{v.escapemark_name(escapemark)}: (void)0;")
2593 redef class AAssertExpr
2596 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return
2598 var cond = v.expr_bool(self.n_expr)
2599 v.add("if (unlikely(!{cond})) \{")
2603 v.add_abort("Assert '{nid.text}' failed")
2605 v.add_abort("Assert failed")
2614 var res = v.new_var(self.mtype.as(not null))
2615 var i1 = v.expr_bool(self.n_expr)
2616 v.add("if ({i1}) \{")
2619 var i2 = v.expr_bool(self.n_expr2)
2620 v.add("{res} = {i2};")
2626 redef class AImpliesExpr
2629 var res = v.new_var(self.mtype.as(not null))
2630 var i1 = v.expr_bool(self.n_expr)
2631 v.add("if (!{i1}) \{")
2634 var i2 = v.expr_bool(self.n_expr2)
2635 v.add("{res} = {i2};")
2641 redef class AAndExpr
2644 var res = v.new_var(self.mtype.as(not null))
2645 var i1 = v.expr_bool(self.n_expr)
2646 v.add("if (!{i1}) \{")
2649 var i2 = v.expr_bool(self.n_expr2)
2650 v.add("{res} = {i2};")
2656 redef class ANotExpr
2659 var cond = v.expr_bool(self.n_expr)
2660 return v.new_expr("!{cond}", self.mtype.as(not null))
2664 redef class AOrElseExpr
2667 var res = v.new_var(self.mtype.as(not null))
2668 var i1 = v.expr(self.n_expr, null)
2669 v.add("if ({i1}!=NULL) \{")
2672 var i2 = v.expr(self.n_expr2, null)
2679 redef class AIntExpr
2680 redef fun expr(v) do return v.new_expr("{self.value.to_s}", self.mtype.as(not null))
2683 redef class AFloatExpr
2684 redef fun expr(v) do return v.new_expr("{self.n_float.text}", self.mtype.as(not null)) # FIXME use value, not n_float
2687 redef class ACharExpr
2688 redef fun expr(v) do return v.new_expr("'{self.value.to_s.escape_to_c}'", self.mtype.as(not null))
2691 redef class AArrayExpr
2694 var mtype = self.mtype.as(MClassType).arguments.first
2695 var array = new Array[RuntimeVariable]
2696 for nexpr in self.n_exprs.n_exprs do
2697 var i = v.expr(nexpr, mtype)
2700 return v.array_instance(array, mtype)
2704 redef class AStringFormExpr
2705 redef fun expr(v) do return v.string_instance(self.value.as(not null))
2708 redef class ASuperstringExpr
2711 var array = new Array[RuntimeVariable]
2712 for ne in self.n_exprs do
2713 if ne isa AStringFormExpr and ne.value == "" then continue # skip empty sub-strings
2714 var i = v.expr(ne, null)
2717 var a = v.array_instance(array, v.object_type)
2718 var res = v.send(v.get_property("to_s", a.mtype), [a])
2723 redef class ACrangeExpr
2726 var i1 = v.expr(self.n_expr, null)
2727 var i2 = v.expr(self.n_expr2, null)
2728 var mtype = self.mtype.as(MClassType)
2729 var res = v.init_instance(mtype)
2730 var it = v.compile_callsite(init_callsite.as(not null), [res, i1, i2])
2735 redef class AOrangeExpr
2738 var i1 = v.expr(self.n_expr, null)
2739 var i2 = v.expr(self.n_expr2, null)
2740 var mtype = self.mtype.as(MClassType)
2741 var res = v.init_instance(mtype)
2742 var it = v.compile_callsite(init_callsite.as(not null), [res, i1, i2])
2747 redef class ATrueExpr
2748 redef fun expr(v) do return v.new_expr("1", self.mtype.as(not null))
2751 redef class AFalseExpr
2752 redef fun expr(v) do return v.new_expr("0", self.mtype.as(not null))
2755 redef class ANullExpr
2756 redef fun expr(v) do return v.new_expr("NULL", self.mtype.as(not null))
2759 redef class AIsaExpr
2762 var i = v.expr(self.n_expr, null)
2763 return v.type_test(i, self.cast_type.as(not null), "isa")
2767 redef class AAsCastExpr
2770 var i = v.expr(self.n_expr, null)
2771 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return i
2773 v.add_cast(i, self.mtype.as(not null), "as")
2778 redef class AAsNotnullExpr
2781 var i = v.expr(self.n_expr, null)
2782 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return i
2784 if i.mtype.ctype != "val*" then return i
2786 v.add("if (unlikely({i} == NULL)) \{")
2787 v.add_abort("Cast failed")
2793 redef class AParExpr
2794 redef fun expr(v) do return v.expr(self.n_expr, null)
2797 redef class AOnceExpr
2800 var mtype = self.mtype.as(not null)
2801 var name = v.get_name("varonce")
2802 var guard = v.get_name(name + "_guard")
2803 v.add_decl("static {mtype.ctype} {name};")
2804 v.add_decl("static int {guard};")
2805 var res = v.new_var(mtype)
2806 v.add("if ({guard}) \{")
2807 v.add("{res} = {name};")
2809 var i = v.expr(self.n_expr, mtype)
2810 v.add("{res} = {i};")
2811 v.add("{name} = {res};")
2812 v.add("{guard} = 1;")
2818 redef class ASendExpr
2821 var recv = v.expr(self.n_expr, null)
2823 for a in self.raw_arguments do
2824 args.add(v.expr(a, null))
2826 return v.compile_callsite(self.callsite.as(not null), args)
2830 redef class ASendReassignFormExpr
2833 var recv = v.expr(self.n_expr, null)
2835 for a in self.raw_arguments do
2836 args.add(v.expr(a, null))
2838 var value = v.expr(self.n_value, null)
2840 var left = v.compile_callsite(self.callsite.as(not null), args)
2843 var res = v.compile_callsite(self.reassign_callsite.as(not null), [left, value])
2847 v.compile_callsite(self.write_callsite.as(not null), args)
2851 redef class ASuperExpr
2854 var recv = v.frame.arguments.first
2856 for a in self.n_args.n_exprs do
2857 args.add(v.expr(a, null))
2860 var callsite = self.callsite
2861 if callsite != null then
2862 # Add additionnals arguments for the super init call
2863 if args.length == 1 then
2864 for i in [0..callsite.msignature.arity[ do
2865 args.add(v.frame.arguments[i+1])
2869 var res = v.compile_callsite(callsite, args)
2873 if args.length == 1 then
2874 args = v.frame.arguments
2877 # stantard call-next-method
2878 return v.supercall(mpropdef.as(not null), recv.mtype.as(MClassType), args)
2882 redef class ANewExpr
2885 var mtype = self.mtype.as(MClassType)
2887 var ctype = mtype.ctype
2888 if mtype.mclass.name == "NativeArray" then
2889 assert self.n_args.n_exprs.length == 1
2890 var l = v.expr(self.n_args.n_exprs.first, null)
2891 assert mtype isa MGenericType
2892 var elttype = mtype.arguments.first
2893 return v.native_array_instance(elttype, l)
2894 else if ctype == "val*" then
2895 recv = v.init_instance(mtype)
2896 else if ctype == "void*" then
2897 recv = v.new_expr("NULL/*special!*/", mtype)
2899 recv = v.new_expr("({ctype})0/*special!*/", mtype)
2902 for a in self.n_args.n_exprs do
2903 args.add(v.expr(a, null))
2905 var res2 = v.compile_callsite(self.callsite.as(not null), args)
2906 if res2 != null then
2907 #self.debug("got {res2} from {mproperty}. drop {recv}")
2914 redef class AAttrExpr
2917 var recv = v.expr(self.n_expr, null)
2918 var mproperty = self.mproperty.as(not null)
2919 return v.read_attribute(mproperty, recv)
2923 redef class AAttrAssignExpr
2926 var recv = v.expr(self.n_expr, null)
2927 var i = v.expr(self.n_value, null)
2928 var mproperty = self.mproperty.as(not null)
2929 v.write_attribute(mproperty, recv, i)
2933 redef class AAttrReassignExpr
2936 var recv = v.expr(self.n_expr, null)
2937 var value = v.expr(self.n_value, null)
2938 var mproperty = self.mproperty.as(not null)
2939 var attr = v.read_attribute(mproperty, recv)
2940 var res = v.compile_callsite(self.reassign_callsite.as(not null), [attr, value])
2942 v.write_attribute(mproperty, recv, res)
2946 redef class AIssetAttrExpr
2949 var recv = v.expr(self.n_expr, null)
2950 var mproperty = self.mproperty.as(not null)
2951 return v.isset_attribute(mproperty, recv)
2955 redef class ADebugTypeExpr
2964 redef class Array[E]
2965 # Return a new `Array` with the elements only contened in self and not in `o
`
2966 fun -(o: Array[E]): Array[E] do
2967 var res = new Array[E]
2968 for e in self do if not o.has(e) then res.add(e)
2974 # All `MProperty` associated to all `MClassDef` of `mclass
`
2975 fun properties(mclass: MClass): Set[MProperty] do
2976 if not self.properties_cache.has_key(mclass) then
2977 var properties = new HashSet[MProperty]
2978 var parents = new Array[MClass]
2979 if self.flatten_mclass_hierarchy.has(mclass) then
2980 parents.add_all(mclass.in_hierarchy(self).direct_greaters)
2982 for parent in parents do
2983 properties.add_all(self.properties(parent))
2985 for mclassdef in mclass.mclassdefs do
2986 if not self.in_importation <= mclassdef.mmodule then continue
2987 for mprop in mclassdef.intro_mproperties do
2988 properties.add(mprop)
2991 self.properties_cache[mclass] = properties
2993 return properties_cache[mclass]
2995 private var properties_cache: Map[MClass, Set[MProperty]] = new HashMap[MClass, Set[MProperty]]
2997 # Write FFI and nitni results to file
2998 fun finalize_ffi(c: AbstractCompiler) do end
3000 # Give requided addinional system libraries (as given to LD_LIBS)
3001 # Note: can return null instead of an empty set
3002 fun collect_linker_libs: nullable Set[String] do return null
3005 # Create a tool context to handle options and paths
3006 var toolcontext = new ToolContext
3008 var opt_mixins = new OptionArray("Additionals module to min-in", "-m")
3009 toolcontext.option_context.add_option(opt_mixins)
3011 toolcontext.tooldescription = "Usage: nitg [OPTION]... file.nit...\nCompiles Nit programs."
3013 # We do not add other options, so process them now!
3014 toolcontext.process_options(args)
3016 # We need a model to collect stufs
3017 var model = new Model
3018 # An a model builder to parse files
3019 var modelbuilder = new ModelBuilder(model, toolcontext)
3021 var arguments = toolcontext.option_context.rest
3022 if arguments.length > 1 and toolcontext.opt_output.value != null then
3023 print "Error: --output needs a single source file. Do you prefer --dir?"
3027 # Here we load an process all modules passed on the command line
3028 var mmodules = modelbuilder.parse(arguments)
3029 var mixins = modelbuilder.parse(opt_mixins.value)
3031 if mmodules.is_empty then return
3032 modelbuilder.run_phases
3034 for mmodule in mmodules do
3035 toolcontext.info("*** PROCESS {mmodule} ***", 1)
3037 if not mixins.is_empty then
3040 toolcontext.run_global_phases(ms)