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
27 # Add compiling options
28 redef class ToolContext
30 var opt_output
= new OptionString("Output file", "-o", "--output")
32 var opt_dir
= new OptionString("Output directory", "--dir")
34 var opt_no_cc
= new OptionBool("Do not invoke C compiler", "--no-cc")
36 var opt_no_main
= new OptionBool("Do not generate main entry point", "--no-main")
38 var opt_make_flags
= new OptionString("Additional options to make", "--make-flags")
40 var opt_max_c_lines
= new OptionInt("Maximum number of lines in generated C files. Use 0 for unlimited", 10000, "--max-c-lines")
42 var opt_group_c_files
= new OptionBool("Group all generated code in the same series of files", "--group-c-files")
44 var opt_compile_dir
= new OptionString("Directory used to generate temporary files", "--compile-dir")
46 var opt_hardening
= new OptionBool("Generate contracts in the C code against bugs in the compiler", "--hardening")
47 # --no-check-covariance
48 var opt_no_check_covariance
= new OptionBool("Disable type tests of covariant parameters (dangerous)", "--no-check-covariance")
49 # --no-check-attr-isset
50 var opt_no_check_attr_isset
= new OptionBool("Disable isset tests before each attribute access (dangerous)", "--no-check-attr-isset")
52 var opt_no_check_assert
= new OptionBool("Disable the evaluation of explicit 'assert' and 'as' (dangerous)", "--no-check-assert")
54 var opt_no_check_autocast
= new OptionBool("Disable implicit casts on unsafe expression usage (dangerous)", "--no-check-autocast")
56 var opt_no_check_null
= new OptionBool("Disable tests of null receiver (dangerous)", "--no-check-null")
58 var opt_no_check_all
= new OptionBool("Disable all tests (dangerous)", "--no-check-all")
59 # --typing-test-metrics
60 var opt_typing_test_metrics
= new OptionBool("Enable static and dynamic count of all type tests", "--typing-test-metrics")
61 # --invocation-metrics
62 var opt_invocation_metrics
= new OptionBool("Enable static and dynamic count of all method invocations", "--invocation-metrics")
63 # --isset-checks-metrics
64 var opt_isset_checks_metrics
= new OptionBool("Enable static and dynamic count of isset checks before attributes access", "--isset-checks-metrics")
66 var opt_stacktrace
= new OptionString("Control the generation of stack traces", "--stacktrace")
68 var opt_no_gcc_directive
= new OptionArray("Disable a advanced gcc directives for optimization", "--no-gcc-directive")
70 var opt_release
= new OptionBool("Compile in release mode and finalize application", "--release")
75 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
)
76 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
)
77 self.option_context
.add_option
(self.opt_typing_test_metrics
, self.opt_invocation_metrics
, self.opt_isset_checks_metrics
)
78 self.option_context
.add_option
(self.opt_stacktrace
)
79 self.option_context
.add_option
(self.opt_no_gcc_directive
)
80 self.option_context
.add_option
(self.opt_release
)
81 self.option_context
.add_option
(self.opt_max_c_lines
, self.opt_group_c_files
)
83 opt_no_main
.hidden
= true
86 redef fun process_options
(args
)
90 var st
= opt_stacktrace
.value
91 if st
== "none" or st
== "libunwind" or st
== "nitstack" then
93 else if st
== "auto" or st
== null then
95 opt_stacktrace
.value
= "nitstack"
97 print
"Error: unknown value `{st}` for --stacktrace. Use `none`, `libunwind`, `nitstack` or `auto`."
101 if opt_output
.value
!= null and opt_dir
.value
!= null then
102 print
"Error: cannot use both --dir and --output"
106 if opt_no_check_all
.value
then
107 opt_no_check_covariance
.value
= true
108 opt_no_check_attr_isset
.value
= true
109 opt_no_check_assert
.value
= true
110 opt_no_check_autocast
.value
= true
111 opt_no_check_null
.value
= true
116 redef class ModelBuilder
117 # The compilation directory
118 var compile_dir
: String
120 # Simple indirection to `Toolchain::write_and_make`
121 protected fun write_and_make
(compiler
: AbstractCompiler)
123 var platform
= compiler
.mainmodule
.target_platform
125 if platform
== null then
126 toolchain
= new MakefileToolchain(toolcontext
)
128 toolchain
= platform
.toolchain
(toolcontext
)
130 compile_dir
= toolchain
.compile_dir
131 toolchain
.write_and_make compiler
136 fun toolchain
(toolcontext
: ToolContext): Toolchain is abstract
140 var toolcontext
: ToolContext
142 fun compile_dir
: String
144 var compile_dir
= toolcontext
.opt_compile_dir
.value
145 if compile_dir
== null then compile_dir
= ".nit_compile"
149 fun write_and_make
(compiler
: AbstractCompiler) is abstract
152 class MakefileToolchain
155 redef fun write_and_make
(compiler
)
157 var compile_dir
= compile_dir
159 # Generate the .h and .c files
160 # A single C file regroups many compiled rumtime functions
161 # 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
163 self.toolcontext
.info
("*** WRITING C ***", 1)
167 var cfiles
= new Array[String]
168 write_files
(compiler
, compile_dir
, cfiles
)
170 # Generate the Makefile
172 write_makefile
(compiler
, compile_dir
, cfiles
)
175 self.toolcontext
.info
("*** END WRITING C: {time1-time0} ***", 2)
177 # Execute the Makefile
179 if self.toolcontext
.opt_no_cc
.value
then return
182 self.toolcontext
.info
("*** COMPILING C ***", 1)
184 compile_c_code
(compiler
, compile_dir
)
187 self.toolcontext
.info
("*** END COMPILING C: {time1-time0} ***", 2)
190 fun write_files
(compiler
: AbstractCompiler, compile_dir
: String, cfiles
: Array[String])
192 var platform
= compiler
.mainmodule
.target_platform
193 if self.toolcontext
.opt_stacktrace
.value
== "nitstack" and (platform
== null or platform
.supports_libunwind
) then compiler
.build_c_to_nit_bindings
194 var cc_opt_with_libgc
= "-DWITH_LIBGC"
195 if platform
!= null and not platform
.supports_libgc
then cc_opt_with_libgc
= ""
197 # Add gc_choser.h to aditionnal bodies
198 var gc_chooser
= new ExternCFile("gc_chooser.c", cc_opt_with_libgc
)
199 if cc_opt_with_libgc
!= "" then gc_chooser
.pkgconfigs
.add
"bdw-gc"
200 compiler
.extern_bodies
.add
(gc_chooser
)
201 var clib
= toolcontext
.nit_dir
/ "clib"
202 compiler
.files_to_copy
.add
"{clib}/gc_chooser.c"
203 compiler
.files_to_copy
.add
"{clib}/gc_chooser.h"
206 for m
in compiler
.mainmodule
.in_importation
.greaters
do
207 compiler
.finalize_ffi_for_module
(m
)
210 # Copy original .[ch] files to compile_dir
211 for src
in compiler
.files_to_copy
do
212 var basename
= src
.basename
("")
213 var dst
= "{compile_dir}/{basename}"
217 var hfilename
= compiler
.header
.file
.name
+ ".h"
218 var hfilepath
= "{compile_dir}/{hfilename}"
219 var h
= new OFStream.open
(hfilepath
)
220 for l
in compiler
.header
.decl_lines
do
224 for l
in compiler
.header
.lines
do
230 var max_c_lines
= toolcontext
.opt_max_c_lines
.value
231 for f
in compiler
.files
do
234 var file
: nullable OFStream = null
235 for vis
in f
.writers
do
236 if vis
== compiler
.header
then continue
237 var total_lines
= vis
.lines
.length
+ vis
.decl_lines
.length
238 if total_lines
== 0 then continue
240 if file
== null or (count
> max_c_lines
and max_c_lines
> 0) then
242 if file
!= null then file
.close
243 var cfilename
= "{f.name}.{i}.c"
244 var cfilepath
= "{compile_dir}/{cfilename}"
245 self.toolcontext
.info
("new C source files to compile: {cfilepath}", 3)
246 cfiles
.add
(cfilename
)
247 file
= new OFStream.open
(cfilepath
)
248 file
.write
"#include \"{f.name}.0.h\
"\n"
251 for l
in vis
.decl_lines
do
255 for l
in vis
.lines
do
260 if file
== null then continue
263 var cfilename
= "{f.name}.0.h"
264 var cfilepath
= "{compile_dir}/{cfilename}"
265 var hfile
: nullable OFStream = null
266 hfile
= new OFStream.open
(cfilepath
)
267 hfile
.write
"#include \"{hfilename}\
"\n"
268 for key
in f
.required_declarations
do
269 if not compiler
.provided_declarations
.has_key
(key
) then
270 var node
= compiler
.requirers_of_declarations
.get_or_null
(key
)
272 node
.debug
"No provided declaration for {key}"
274 print
"No provided declaration for {key}"
278 hfile
.write compiler
.provided_declarations
[key
]
284 self.toolcontext
.info
("Total C source files to compile: {cfiles.length}", 2)
287 fun makefile_name
(mainmodule
: MModule): String do return "{mainmodule.c_name}.mk"
289 fun default_outname
(mainmodule
: MModule): String
291 # Search a non fictive module
292 var res
= mainmodule
.name
293 while mainmodule
.is_fictive
do
294 mainmodule
= mainmodule
.in_importation
.direct_greaters
.first
295 res
= mainmodule
.name
300 # Combine options and platform informations to get the final path of the outfile
301 fun outfile
(mainmodule
: MModule): String
303 var res
= self.toolcontext
.opt_output
.value
304 if res
!= null then return res
305 res
= default_outname
(mainmodule
)
306 var dir
= self.toolcontext
.opt_dir
.value
307 if dir
!= null then return dir
.join_path
(res
)
311 fun write_makefile
(compiler
: AbstractCompiler, compile_dir
: String, cfiles
: Array[String])
313 var mainmodule
= compiler
.mainmodule
314 var platform
= compiler
.mainmodule
.target_platform
316 var outname
= outfile
(mainmodule
)
318 var outpath
= compile_dir
.relpath
(outname
)
319 var makename
= makefile_name
(mainmodule
)
320 var makepath
= "{compile_dir}/{makename}"
321 var makefile
= new OFStream.open
(makepath
)
323 var linker_options
= new HashSet[String]
324 for m
in mainmodule
.in_importation
.greaters
do
325 var libs
= m
.collect_linker_libs
326 if libs
!= null then linker_options
.add_all
(libs
)
329 makefile
.write
("CC = ccache cc\nCXX = ccache c++\nCFLAGS = -g -O2 -Wno-unused-value -Wno-switch\nCINCL =\nLDFLAGS ?= \nLDLIBS ?= -lm {linker_options.join(" ")}\n\n")
331 var ost
= toolcontext
.opt_stacktrace
.value
332 if (ost
== "libunwind" or ost
== "nitstack") and (platform
== null or platform
.supports_libunwind
) then makefile
.write
("NEED_LIBUNWIND := YesPlease\n")
334 # Dynamic adaptations
335 # While `platform` enable complex toolchains, they are statically applied
336 # For a dynamic adaptsation of the compilation, the generated Makefile should check and adapt things itself
338 # Check and adapt the targeted system
339 makefile
.write
("uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')\n")
340 makefile
.write
("ifeq ($(uname_S),Darwin)\n")
341 # remove -lunwind since it is already included on macosx
342 makefile
.write
("\tNEED_LIBUNWIND :=\n")
343 makefile
.write
("endif\n\n")
345 # Check and adapt for the compiler used
346 # clang need an additionnal `-Qunused-arguments`
347 makefile
.write
("clang_check := $(shell sh -c '$(CC) -v 2>&1 | grep -q clang; echo $$?')\nifeq ($(clang_check), 0)\n\tCFLAGS += -Qunused-arguments\nendif\n")
349 makefile
.write
("ifdef NEED_LIBUNWIND\n\tLDLIBS += -lunwind\nendif\n")
351 makefile
.write
("all: {outpath}\n\n")
353 var ofiles
= new Array[String]
354 var dep_rules
= new Array[String]
355 # Compile each generated file
357 var o
= f
.strip_extension
(".c") + ".o"
358 makefile
.write
("{o}: {f}\n\t$(CC) $(CFLAGS) $(CINCL) -c -o {o} {f}\n\n")
363 var java_files
= new Array[ExternFile]
365 var pkgconfigs
= new Array[String]
366 for f
in compiler
.extern_bodies
do
367 pkgconfigs
.add_all f
.pkgconfigs
370 if not pkgconfigs
.is_empty
then
372 # does pkg-config exists?
373 ifneq ($(shell which pkg-config >/dev/null; echo $$?), 0)
374 $(error "Command `pkg-config` not found. Please install it")
377 for p
in pkgconfigs
do
379 # Check for library {{{p}}}
380 ifneq ($(shell pkg-config --exists '{{{p}}}'; echo $$?), 0)
381 $(error "pkg-config: package {{{p}}} is not found.")
387 # Compile each required extern body into a specific .o
388 for f
in compiler
.extern_bodies
do
389 var o
= f
.makefile_rule_name
390 var ff
= f
.filename
.basename
("")
391 makefile
.write
("{o}: {ff}\n")
392 makefile
.write
("\t{f.makefile_rule_content}\n\n")
393 dep_rules
.add
(f
.makefile_rule_name
)
395 if f
.compiles_to_o_file
then ofiles
.add
(o
)
396 if f
.add_to_jar
then java_files
.add
(f
)
399 if not java_files
.is_empty
then
400 var jar_file
= "{outpath}.jar"
402 var class_files_array
= new Array[String]
403 for f
in java_files
do class_files_array
.add
(f
.makefile_rule_name
)
404 var class_files
= class_files_array
.join
(" ")
406 makefile
.write
("{jar_file}: {class_files}\n")
407 makefile
.write
("\tjar cf {jar_file} {class_files}\n\n")
408 dep_rules
.add jar_file
413 if not pkgconfigs
.is_empty
then
414 pkg
= "`pkg-config --libs {pkgconfigs.join(" ")}`"
416 makefile
.write
("{outpath}: {dep_rules.join(" ")}\n\t$(CC) $(LDFLAGS) -o {outpath} {ofiles.join(" ")} $(LDLIBS) {pkg}\n\n")
418 makefile
.write
("clean:\n\trm {ofiles.join(" ")} 2>/dev/null\n\n")
420 self.toolcontext
.info
("Generated makefile: {makepath}", 2)
422 makepath
.file_copy_to
"{compile_dir}/Makefile"
425 fun compile_c_code
(compiler
: AbstractCompiler, compile_dir
: String)
427 var makename
= makefile_name
(compiler
.mainmodule
)
429 var makeflags
= self.toolcontext
.opt_make_flags
.value
430 if makeflags
== null then makeflags
= ""
431 self.toolcontext
.info
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags}", 2)
434 if self.toolcontext
.verbose_level
>= 3 then
435 res
= sys
.system
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1")
437 res
= sys
.system
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1 >/dev/null")
440 toolcontext
.error
(null, "make failed! Error code: {res}.")
445 # Singleton that store the knowledge about the compilation process
446 abstract class AbstractCompiler
447 type VISITOR: AbstractCompilerVisitor
449 # Table corresponding c_names to nit names (methods)
450 var names
= new HashMap[String, String]
452 # The main module of the program currently compiled
453 # Is assigned during the separate compilation
454 var mainmodule
: MModule is writable
456 # The real main module of the program
457 var realmainmodule
: MModule is noinit
459 # The modelbuilder used to know the model and the AST
460 var modelbuilder
: ModelBuilder is protected writable
462 # Is hardening asked? (see --hardening)
463 fun hardening
: Bool do return self.modelbuilder
.toolcontext
.opt_hardening
.value
467 self.realmainmodule
= mainmodule
470 # Force the creation of a new file
471 # The point is to avoid contamination between must-be-compiled-separately files
472 fun new_file
(name
: String): CodeFile
474 if modelbuilder
.toolcontext
.opt_group_c_files
.value
then
475 if self.files
.is_empty
then
476 var f
= new CodeFile(mainmodule
.c_name
)
479 return self.files
.first
481 var f
= new CodeFile(name
)
486 # The list of all associated files
487 # Used to generate .c files
488 var files
= new List[CodeFile]
490 # Initialize a visitor specific for a compiler engine
491 fun new_visitor
: VISITOR is abstract
493 # Where global declaration are stored (the main .h)
494 var header
: CodeWriter is writable, noinit
496 # Provide a declaration that can be requested (before or latter) by a visitor
497 fun provide_declaration
(key
: String, s
: String)
499 if self.provided_declarations
.has_key
(key
) then
500 assert self.provided_declarations
[key
] == s
502 self.provided_declarations
[key
] = s
505 private var provided_declarations
= new HashMap[String, String]
507 private var requirers_of_declarations
= new HashMap[String, ANode]
509 # Builds the .c and .h files to be used when generating a Stack Trace
510 # Binds the generated C function names to Nit function names
511 fun build_c_to_nit_bindings
513 var compile_dir
= modelbuilder
.compile_dir
515 var stream
= new OFStream.open
("{compile_dir}/c_functions_hash.c")
516 stream
.write
("#include <string.h>\n")
517 stream
.write
("#include <stdlib.h>\n")
518 stream
.write
("#include \"c_functions_hash
.h\
"\n")
519 stream
.write
("typedef struct C_Nit_Names\{char* name; char* nit_name;\}C_Nit_Names;\n")
520 stream
.write
("const char* get_nit_name(register const char* procproc, register unsigned int len)\{\n")
521 stream
.write
("char* procname = malloc(len+1);")
522 stream
.write
("memcpy(procname, procproc, len);")
523 stream
.write
("procname[len] = '\\0';")
524 stream
.write
("static const C_Nit_Names map[{names.length}] = \{\n")
525 for i
in names
.keys
do
528 stream.write("\
",\"")
529 stream.write(names[i])
530 stream.write("\
"\},\n")
532 stream
.write
("\};\n")
533 stream
.write
("int i;")
534 stream
.write
("for(i = 0; i < {names.length}; i++)\{")
535 stream
.write
("if(strcmp(procname,map[i].name) == 0)\{")
536 stream
.write
("free(procname);")
537 stream
.write
("return map[i].nit_name;")
540 stream
.write
("free(procname);")
541 stream
.write
("return NULL;")
545 stream
= new OFStream.open
("{compile_dir}/c_functions_hash.h")
546 stream
.write
("const char* get_nit_name(register const char* procname, register unsigned int len);\n")
549 extern_bodies
.add
(new ExternCFile("{compile_dir}/c_functions_hash.c", ""))
553 # This method call compile_header_strucs method that has to be refined
554 fun compile_header
do
555 self.header
.add_decl
("#include <stdlib.h>")
556 self.header
.add_decl
("#include <stdio.h>")
557 self.header
.add_decl
("#include <string.h>")
558 self.header
.add_decl
("#include \"gc_chooser
.h\
"")
559 self.header
.add_decl
("#ifdef ANDROID")
560 self.header
.add_decl
(" #include <android/log.h>")
561 self.header
.add_decl
(" #define PRINT_ERROR(...) (void)__android_log_print(ANDROID_LOG_WARN, \"Nit\
", __VA_ARGS__)")
562 self.header
.add_decl
("#else")
563 self.header
.add_decl
(" #define PRINT_ERROR(...) fprintf(stderr, __VA_ARGS__)")
564 self.header
.add_decl
("#endif")
566 compile_header_structs
567 compile_nitni_structs
569 var gccd_disable
= modelbuilder
.toolcontext
.opt_no_gcc_directive
.value
570 if gccd_disable
.has
("noreturn") or gccd_disable
.has
("all") then
571 # Signal handler function prototype
572 self.header
.add_decl
("void show_backtrace(int);")
574 self.header
.add_decl
("void show_backtrace(int) __attribute__ ((noreturn));")
577 if gccd_disable
.has
("likely") or gccd_disable
.has
("all") then
578 self.header
.add_decl
("#define likely(x) (x)")
579 self.header
.add_decl
("#define unlikely(x) (x)")
580 else if gccd_disable
.has
("correct-likely") then
581 # invert the `likely` definition
582 # Used by masochists to bench the worst case
583 self.header
.add_decl
("#define likely(x) __builtin_expect((x),0)")
584 self.header
.add_decl
("#define unlikely(x) __builtin_expect((x),1)")
586 self.header
.add_decl
("#define likely(x) __builtin_expect((x),1)")
587 self.header
.add_decl
("#define unlikely(x) __builtin_expect((x),0)")
590 # Global variable used by intern methods
591 self.header
.add_decl
("extern int glob_argc;")
592 self.header
.add_decl
("extern char **glob_argv;")
593 self.header
.add_decl
("extern val *glob_sys;")
596 # Declaration of structures for live Nit types
597 protected fun compile_header_structs
is abstract
599 # Declaration of structures for nitni undelying the FFI
600 protected fun compile_nitni_structs
602 self.header
.add_decl
"""
603 /* Native reference to Nit objects */
604 /* This structure is used to represent every Nit type in extern methods and custom C code. */
606 struct nitni_ref *next,
607 *prev; /* adjacent global references in global list */
608 int count; /* number of time this global reference has been marked */
611 /* List of global references from C code to Nit objects */
612 /* Instanciated empty at init of Nit system and filled explicitly by user in C code */
613 struct nitni_global_ref_list_t {
614 struct nitni_ref *head, *tail;
616 extern struct nitni_global_ref_list_t *nitni_global_ref_list;
618 /* Initializer of global reference list */
619 extern void nitni_global_ref_list_init();
621 /* Intern function to add a global reference to the list */
622 extern void nitni_global_ref_add( struct nitni_ref *ref );
624 /* Intern function to remove a global reference from the list */
625 extern void nitni_global_ref_remove( struct nitni_ref *ref );
627 /* Increase count on an existing global reference */
628 extern void nitni_global_ref_incr( struct nitni_ref *ref );
630 /* Decrease count on an existing global reference */
631 extern void nitni_global_ref_decr( struct nitni_ref *ref );
635 fun compile_finalizer_function
637 var finalizable_type
= mainmodule
.finalizable_type
638 if finalizable_type
== null then return
640 var finalize_meth
= mainmodule
.try_get_primitive_method
("finalize", finalizable_type
.mclass
)
642 if finalize_meth
== null then
643 modelbuilder
.toolcontext
.error
(null, "The `Finalizable` class doesn't declare the `finalize` method.")
647 var v
= self.new_visitor
648 v
.add_decl
"void gc_finalize (void *obj, void *client_data) \{"
649 var recv
= v
.new_expr
("obj", finalizable_type
)
650 v
.send
(finalize_meth
, [recv
])
654 # Generate the main C function.
658 # * allocate the Sys object if it exists
659 # * call init if is exists
660 # * call main if it exists
661 fun compile_main_function
663 var v
= self.new_visitor
664 v
.add_decl
("#include <signal.h>")
665 var ost
= modelbuilder
.toolcontext
.opt_stacktrace
.value
666 var platform
= mainmodule
.target_platform
668 if platform
!= null and not platform
.supports_libunwind
then ost
= "none"
670 var no_main
= (platform
!= null and platform
.no_main
) or modelbuilder
.toolcontext
.opt_no_main
.value
672 if ost
== "nitstack" or ost
== "libunwind" then
673 v
.add_decl
("#define UNW_LOCAL_ONLY")
674 v
.add_decl
("#include <libunwind.h>")
675 if ost
== "nitstack" then
676 v
.add_decl
("#include \"c_functions_hash
.h\
"")
679 v
.add_decl
("int glob_argc;")
680 v
.add_decl
("char **glob_argv;")
681 v
.add_decl
("val *glob_sys;")
683 if self.modelbuilder
.toolcontext
.opt_typing_test_metrics
.value
then
684 for tag
in count_type_test_tags
do
685 v
.add_decl
("long count_type_test_resolved_{tag};")
686 v
.add_decl
("long count_type_test_unresolved_{tag};")
687 v
.add_decl
("long count_type_test_skipped_{tag};")
688 v
.compiler
.header
.add_decl
("extern long count_type_test_resolved_{tag};")
689 v
.compiler
.header
.add_decl
("extern long count_type_test_unresolved_{tag};")
690 v
.compiler
.header
.add_decl
("extern long count_type_test_skipped_{tag};")
694 if self.modelbuilder
.toolcontext
.opt_invocation_metrics
.value
then
695 v
.add_decl
("long count_invoke_by_tables;")
696 v
.add_decl
("long count_invoke_by_direct;")
697 v
.add_decl
("long count_invoke_by_inline;")
698 v
.compiler
.header
.add_decl
("extern long count_invoke_by_tables;")
699 v
.compiler
.header
.add_decl
("extern long count_invoke_by_direct;")
700 v
.compiler
.header
.add_decl
("extern long count_invoke_by_inline;")
703 if self.modelbuilder
.toolcontext
.opt_isset_checks_metrics
.value
then
704 v
.add_decl
("long count_attr_reads = 0;")
705 v
.add_decl
("long count_isset_checks = 0;")
706 v
.compiler
.header
.add_decl
("extern long count_attr_reads;")
707 v
.compiler
.header
.add_decl
("extern long count_isset_checks;")
710 v
.add_decl
("void sig_handler(int signo)\{")
711 v
.add_decl
("PRINT_ERROR(\"Caught signal
: %s\\n\
", strsignal(signo));")
712 v
.add_decl
("show_backtrace(signo);")
715 v
.add_decl
("void show_backtrace (int signo) \{")
716 if ost
== "nitstack" or ost
== "libunwind" then
717 v
.add_decl
("char* opt = getenv(\"NIT_NO_STACK\
");")
718 v
.add_decl
("unw_cursor_t cursor;")
719 v
.add_decl
("if(opt==NULL)\{")
720 v
.add_decl
("unw_context_t uc;")
721 v
.add_decl
("unw_word_t ip;")
722 v
.add_decl
("char* procname = malloc(sizeof(char) * 100);")
723 v
.add_decl
("unw_getcontext(&uc);")
724 v
.add_decl
("unw_init_local(&cursor, &uc);")
725 v
.add_decl
("PRINT_ERROR(\"-------------------------------------------------\\n\
");")
726 v
.add_decl
("PRINT_ERROR(\"-- Stack Trace ------------------------------\\n\
");")
727 v
.add_decl
("PRINT_ERROR(\"-------------------------------------------------\\n\
");")
728 v
.add_decl
("while (unw_step(&cursor) > 0) \{")
729 v
.add_decl
(" unw_get_proc_name(&cursor, procname, 100, &ip);")
730 if ost
== "nitstack" then
731 v
.add_decl
(" const char* recv = get_nit_name(procname, strlen(procname));")
732 v
.add_decl
(" if (recv != NULL)\{")
733 v
.add_decl
(" PRINT_ERROR(\"` %s\\n\", recv);")
734 v.add_decl(" \}else\{")
735 v.add_decl(" PRINT_ERROR(\"` %s\\n\
", procname);")
738 v
.add_decl
(" PRINT_ERROR(\"` %s \\n\",procname);")
741 v.add_decl("PRINT_ERROR(\"-------------------------------------------------\\n\");")
742 v.add_decl("free(procname);")
745 v.add_decl("exit(signo);")
749 v.add_decl("int nit_main(int argc, char** argv) \{")
751 v.add_decl("int main(int argc, char** argv) \{")
754 v.add("signal(SIGABRT, sig_handler);")
755 v.add("signal(SIGFPE, sig_handler);")
756 v.add("signal(SIGILL, sig_handler);")
757 v.add("signal(SIGINT, sig_handler);")
758 v.add("signal(SIGTERM, sig_handler);")
759 v.add("signal(SIGSEGV, sig_handler);")
760 v.add("signal(SIGPIPE, sig_handler);")
762 v.add("glob_argc = argc; glob_argv = argv;")
763 v.add("initialize_gc_option();")
765 v.add "initialize_nitni_global_refs();"
767 var main_type = mainmodule.sys_type
768 if main_type != null then
769 var mainmodule = v.compiler.mainmodule
770 var glob_sys = v.init_instance(main_type)
771 v.add("glob_sys = {glob_sys};")
772 var main_init = mainmodule.try_get_primitive_method("init", main_type.mclass)
773 if main_init != null then
774 v.send(main_init, [glob_sys])
776 var main_method = mainmodule.try_get_primitive_method("run", main_type.mclass) or else
777 mainmodule.try_get_primitive_method("main", main_type.mclass)
778 if main_method != null then
779 v.send(main_method, [glob_sys])
783 if self.modelbuilder.toolcontext.opt_typing_test_metrics.value then
784 v.add_decl("long count_type_test_resolved_total = 0;")
785 v.add_decl("long count_type_test_unresolved_total = 0;")
786 v.add_decl("long count_type_test_skipped_total = 0;")
787 v.add_decl("long count_type_test_total_total = 0;")
788 for tag in count_type_test_tags do
789 v.add_decl("long count_type_test_total_{tag};")
790 v.add("count_type_test_total_{tag} = count_type_test_resolved_{tag} + count_type_test_unresolved_{tag} + count_type_test_skipped_{tag};")
791 v.add("count_type_test_resolved_total += count_type_test_resolved_{tag};")
792 v.add("count_type_test_unresolved_total += count_type_test_unresolved_{tag};")
793 v.add("count_type_test_skipped_total += count_type_test_skipped_{tag};")
794 v.add("count_type_test_total_total += count_type_test_total_{tag};")
796 v.add("printf(\"# dynamic count_type_test: total %l\\n\");")
797 v.add("printf(\"\\tresolved\\tunresolved\\tskipped\\ttotal\\n\");")
798 var tags = count_type_test_tags.to_a
801 v.add("printf(\"{tag}\");")
802 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_resolved_{tag}, 100.0*count_type_test_resolved_{tag}/count_type_test_total_total);")
803 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_unresolved_{tag}, 100.0*count_type_test_unresolved_{tag}/count_type_test_total_total);")
804 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_skipped_{tag}, 100.0*count_type_test_skipped_{tag}/count_type_test_total_total);")
805 v.add("printf(\"\\t%ld (%.2f%%)\\n\", count_type_test_total_{tag}, 100.0*count_type_test_total_{tag}/count_type_test_total_total);")
809 if self.modelbuilder.toolcontext.opt_invocation_metrics.value then
810 v.add_decl("long count_invoke_total;")
811 v.add("count_invoke_total = count_invoke_by_tables + count_invoke_by_direct + count_invoke_by_inline;")
812 v.add("printf(\"# dynamic count_invocation: total %ld\\n\", count_invoke_total);")
813 v.add("printf(\"by table: %ld (%.2f%%)\\n\", count_invoke_by_tables, 100.0*count_invoke_by_tables/count_invoke_total);")
814 v.add("printf(\"direct: %ld (%.2f%%)\\n\", count_invoke_by_direct, 100.0*count_invoke_by_direct/count_invoke_total);")
815 v.add("printf(\"inlined: %ld (%.2f%%)\\n\", count_invoke_by_inline, 100.0*count_invoke_by_inline/count_invoke_total);")
818 if self.modelbuilder.toolcontext.opt_isset_checks_metrics.value then
819 v.add("printf(\"# dynamic attribute reads: %ld\\n\", count_attr_reads);")
820 v.add("printf(\"# dynamic isset checks: %ld\\n\", count_isset_checks);")
827 # Copile all C functions related to the [incr|decr]_ref features of the FFI
828 fun compile_nitni_global_ref_functions
830 var v = self.new_visitor
832 struct nitni_global_ref_list_t *nitni_global_ref_list;
833 void initialize_nitni_global_refs() {
834 nitni_global_ref_list = (struct nitni_global_ref_list_t*)nit_alloc(sizeof(struct nitni_global_ref_list_t));
835 nitni_global_ref_list->head = NULL;
836 nitni_global_ref_list->tail = NULL;
839 void nitni_global_ref_add( struct nitni_ref *ref ) {
840 if ( nitni_global_ref_list->head == NULL ) {
841 nitni_global_ref_list->head = ref;
844 nitni_global_ref_list->tail->next = ref;
845 ref->prev = nitni_global_ref_list->tail;
847 nitni_global_ref_list->tail = ref;
852 void nitni_global_ref_remove( struct nitni_ref *ref ) {
853 if ( ref->prev == NULL ) {
854 nitni_global_ref_list->head = ref->next;
856 ref->prev->next = ref->next;
859 if ( ref->next == NULL ) {
860 nitni_global_ref_list->tail = ref->prev;
862 ref->next->prev = ref->prev;
866 extern void nitni_global_ref_incr( struct nitni_ref *ref ) {
867 if ( ref->count == 0 ) /* not registered */
870 nitni_global_ref_add( ref );
876 extern void nitni_global_ref_decr( struct nitni_ref *ref ) {
877 if ( ref->count == 1 ) /* was last reference */
879 /* remove from list */
880 nitni_global_ref_remove( ref );
888 # List of additional files required to compile (FFI)
889 var extern_bodies = new Array[ExternFile]
891 # List of source files to copy over to the compile dir
892 var files_to_copy = new Array[String]
894 # This is used to avoid adding an extern file more than once
895 private var seen_extern = new ArraySet[String]
897 # Generate code that initialize the attributes on a new instance
898 fun generate_init_attr(v: VISITOR, recv: RuntimeVariable, mtype: MClassType)
900 var cds = mtype.collect_mclassdefs(self.mainmodule).to_a
901 self.mainmodule.linearize_mclassdefs(cds)
903 if not self.modelbuilder.mclassdef2nclassdef.has_key(cd) then continue
904 var n = self.modelbuilder.mclassdef2nclassdef[cd]
905 for npropdef in n.n_propdefs do
906 if npropdef isa AAttrPropdef then
907 npropdef.init_expr(v, recv)
913 # Generate code that check if an attribute is correctly initialized
914 fun generate_check_attr(v: VISITOR, recv: RuntimeVariable, mtype: MClassType)
916 var cds = mtype.collect_mclassdefs(self.mainmodule).to_a
917 self.mainmodule.linearize_mclassdefs(cds)
919 if not self.modelbuilder.mclassdef2nclassdef.has_key(cd) then continue
920 var n = self.modelbuilder.mclassdef2nclassdef[cd]
921 for npropdef in n.n_propdefs do
922 if npropdef isa AAttrPropdef then
923 npropdef.check_expr(v, recv)
931 var count_type_test_tags: Array[String] = ["isa", "as", "auto", "covariance", "erasure"]
932 var count_type_test_resolved: HashMap[String, Int] = init_count_type_test_tags
933 var count_type_test_unresolved: HashMap[String, Int] = init_count_type_test_tags
934 var count_type_test_skipped: HashMap[String, Int] = init_count_type_test_tags
936 protected fun init_count_type_test_tags: HashMap[String, Int]
938 var res = new HashMap[String, Int]
939 for tag in count_type_test_tags do
945 # Display stats about compilation process
949 # * type tests against resolved types (`x
isa Collection[Animal]`)
950 # * type tests against unresolved types (`x
isa Collection[E
]`)
951 # * type tests skipped
955 if self.modelbuilder.toolcontext.opt_typing_test_metrics.value then
956 print "# static count_type_test"
957 print "\tresolved:\tunresolved\tskipped\ttotal"
958 var count_type_test_total = init_count_type_test_tags
959 count_type_test_resolved["total"] = 0
960 count_type_test_unresolved["total"] = 0
961 count_type_test_skipped["total"] = 0
962 count_type_test_total["total"] = 0
963 for tag in count_type_test_tags do
964 count_type_test_total[tag] = count_type_test_resolved[tag] + count_type_test_unresolved[tag] + count_type_test_skipped[tag]
965 count_type_test_resolved["total"] += count_type_test_resolved[tag]
966 count_type_test_unresolved["total"] += count_type_test_unresolved[tag]
967 count_type_test_skipped["total"] += count_type_test_skipped[tag]
968 count_type_test_total["total"] += count_type_test_total[tag]
970 var count_type_test = count_type_test_total["total"]
971 var tags = count_type_test_tags.to_a
975 printn "\t{count_type_test_resolved[tag]} ({div(count_type_test_resolved[tag],count_type_test)}%)"
976 printn "\t{count_type_test_unresolved[tag]} ({div(count_type_test_unresolved[tag],count_type_test)}%)"
977 printn "\t{count_type_test_skipped[tag]} ({div(count_type_test_skipped[tag],count_type_test)}%)"
978 printn "\t{count_type_test_total[tag]} ({div(count_type_test_total[tag],count_type_test)}%)"
984 fun finalize_ffi_for_module(mmodule: MModule) do mmodule.finalize_ffi(self)
987 # Avoid division by zero by returning the string "n/a"
988 fun div(a,b:Int):String
990 if b == 0 then return "n/a"
991 return ((a*10000/b).to_f / 100.0).to_precision(2)
995 # A file unit (may be more than one file if
996 # A file unit aim to be autonomous and is made or one or more `CodeWriter`s
999 var writers = new Array[CodeWriter]
1000 var required_declarations = new HashSet[String]
1003 # Where to store generated lines
1006 var lines: List[String] = new List[String]
1007 var decl_lines: List[String] = new List[String]
1009 # Add a line in the main part of the generated C
1010 fun add(s: String) do self.lines.add(s)
1013 # (used for local or global declaration)
1014 fun add_decl(s: String) do self.decl_lines.add(s)
1018 file.writers.add(self)
1022 # A visitor on the AST of property definition that generate the C code.
1023 abstract class AbstractCompilerVisitor
1025 type COMPILER: AbstractCompiler
1027 # The associated compiler
1028 var compiler: COMPILER
1030 # The current visited AST node
1031 var current_node: nullable ANode = null is writable
1033 # The current `Frame`
1034 var frame: nullable Frame = null is writable
1036 # Alias for self.compiler.mainmodule.object_type
1037 fun object_type: MClassType do return self.compiler.mainmodule.object_type
1039 # Alias for self.compiler.mainmodule.bool_type
1040 fun bool_type: MClassType do return self.compiler.mainmodule.bool_type
1042 var writer: CodeWriter is noinit
1046 self.writer = new CodeWriter(compiler.files.last)
1049 # Force to get the primitive class named `name
` or abort
1050 fun get_class(name: String): MClass do return self.compiler.mainmodule.get_primitive_class(name)
1052 # Force to get the primitive property named `name
` in the instance `recv
` or abort
1053 fun get_property(name: String, recv: MType): MMethod
1055 assert recv isa MClassType
1056 return self.compiler.modelbuilder.force_get_primitive_method(self.current_node, name, recv.mclass, self.compiler.mainmodule)
1059 fun compile_callsite(callsite: CallSite, arguments: Array[RuntimeVariable]): nullable RuntimeVariable
1061 var initializers = callsite.mpropdef.initializers
1062 if not initializers.is_empty then
1063 var recv = arguments.first
1066 for p in initializers do
1067 if p isa MMethod then
1069 for x in p.intro.msignature.mparameters do
1070 args.add arguments[i]
1074 else if p isa MAttribute then
1075 self.write_attribute(p, recv, arguments[i])
1079 assert i == arguments.length
1081 return self.send(callsite.mproperty, [recv])
1084 return self.send(callsite.mproperty, arguments)
1087 fun native_array_instance(elttype: MType, length: RuntimeVariable): RuntimeVariable is abstract
1089 fun calloc_array(ret_type: MType, arguments: Array[RuntimeVariable]) is abstract
1091 fun native_array_def(pname: String, ret_type: nullable MType, arguments: Array[RuntimeVariable]) is abstract
1093 # Evaluate `args
` as expressions in the call of `mpropdef
` on `recv
`.
1094 # This method is used to manage varargs in signatures and returns the real array
1095 # of runtime variables to use in the call.
1096 fun varargize(mpropdef: MMethodDef, recv: RuntimeVariable, args: SequenceRead[AExpr]): Array[RuntimeVariable]
1098 var msignature = mpropdef.new_msignature or else mpropdef.msignature.as(not null)
1099 var res = new Array[RuntimeVariable]
1102 if args.is_empty then return res
1104 var vararg_rank = msignature.vararg_rank
1105 var vararg_len = args.length - msignature.arity
1106 if vararg_len < 0 then vararg_len = 0
1108 for i in [0..msignature.arity[ do
1109 if i == vararg_rank then
1111 if ne isa AVarargExpr then
1112 var e = self.expr(ne.n_expr, null)
1116 var vararg = new Array[RuntimeVariable]
1117 for j in [vararg_rank..vararg_rank+vararg_len] do
1118 var e = self.expr(args[j], null)
1121 var elttype = msignature.mparameters[vararg_rank].mtype
1122 var arg = self.vararg_instance(mpropdef, recv, vararg, elttype)
1126 if i > vararg_rank then j += vararg_len
1127 var e = self.expr(args[j], null)
1136 # Anchor a type to the main module and the current receiver
1137 fun anchor(mtype: MType): MType
1139 if not mtype.need_anchor then return mtype
1140 return mtype.anchor_to(self.compiler.mainmodule, self.frame.receiver)
1143 fun resolve_for(mtype: MType, recv: RuntimeVariable): MType
1145 if not mtype.need_anchor then return mtype
1146 return mtype.resolve_for(recv.mcasttype, self.frame.receiver, self.compiler.mainmodule, true)
1149 # Unsafely cast a value to a new type
1150 # ie the result share the same C variable but my have a different mcasttype
1151 # NOTE: if the adaptation is useless then `value
` is returned as it.
1152 # ENSURE: `result
.name
== value
.name
`
1153 fun autoadapt(value: RuntimeVariable, mtype: MType): RuntimeVariable
1155 mtype = self.anchor(mtype)
1156 var valmtype = value.mcasttype
1157 if valmtype.is_subtype(self.compiler.mainmodule, null, mtype) then
1161 if valmtype isa MNullableType and valmtype.mtype.is_subtype(self.compiler.mainmodule, null, mtype) then
1162 var res = new RuntimeVariable(value.name, valmtype, valmtype.mtype)
1165 var res = new RuntimeVariable(value.name, valmtype, mtype)
1170 # Generate a super call from a method definition
1171 fun supercall(m: MMethodDef, recvtype: MClassType, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1173 # Adapt the arguments of a method according to targetted `MMethodDef`
1174 fun adapt_signature(m: MMethodDef, args: Array[RuntimeVariable]) is abstract
1176 # Unbox all the arguments of a method when implemented `extern` or `intern`
1177 fun unbox_signature_extern(m: MMethodDef, args: Array[RuntimeVariable]) is abstract
1179 # Box or unbox a value to another type iff a C type conversion is needed
1180 # ENSURE: `result
.mtype
.ctype
== mtype
.ctype
`
1181 fun autobox(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1183 # Box extern classes to be used in the generated code
1184 fun box_extern(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1186 # Unbox extern classes to be used in extern code (legacy NI and FFI)
1187 fun unbox_extern(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1189 # Generate a polymorphic subtype test
1190 fun type_test(value: RuntimeVariable, mtype: MType, tag: String): RuntimeVariable is abstract
1192 # Generate the code required to dynamically check if 2 objects share the same runtime type
1193 fun is_same_type_test(value1, value2: RuntimeVariable): RuntimeVariable is abstract
1195 # Generate a Nit "is" for two runtime_variables
1196 fun equal_test(value1, value2: RuntimeVariable): RuntimeVariable is abstract
1200 # Generate a static call on a method definition
1201 fun call(m: MMethodDef, recvtype: MClassType, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1203 # Generate a polymorphic send for the method `m
` and the arguments `args
`
1204 fun send(m: MMethod, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1206 # Generate a monomorphic send for the method `m
`, the type `t
` and the arguments `args
`
1207 fun monomorphic_send(m: MMethod, t: MType, args: Array[RuntimeVariable]): nullable RuntimeVariable
1209 assert t isa MClassType
1210 var propdef = m.lookup_first_definition(self.compiler.mainmodule, t)
1211 return self.call(propdef, t, args)
1214 # Generate a monomorphic super send from the method `m
`, the type `t
` and the arguments `args
`
1215 fun monomorphic_super_send(m: MMethodDef, t: MType, args: Array[RuntimeVariable]): nullable RuntimeVariable
1217 assert t isa MClassType
1218 m = m.lookup_next_definition(self.compiler.mainmodule, t)
1219 return self.call(m, t, args)
1222 # Attributes handling
1224 # Generate a polymorphic attribute is_set test
1225 fun isset_attribute(a: MAttribute, recv: RuntimeVariable): RuntimeVariable is abstract
1227 # Generate a polymorphic attribute read
1228 fun read_attribute(a: MAttribute, recv: RuntimeVariable): RuntimeVariable is abstract
1230 # Generate a polymorphic attribute write
1231 fun write_attribute(a: MAttribute, recv: RuntimeVariable, value: RuntimeVariable) is abstract
1235 # Add a check and an abort for a null receiver if needed
1236 fun check_recv_notnull(recv: RuntimeVariable)
1238 if self.compiler.modelbuilder.toolcontext.opt_no_check_null.value then return
1240 var maybenull = recv.mcasttype isa MNullableType or recv.mcasttype isa MNullType
1242 self.add("if (unlikely({recv} == NULL)) \{")
1243 self.add_abort("Receiver is null")
1250 private var names = new HashSet[String]
1251 private var last: Int = 0
1253 # Return a new name based on `s
` and unique in the visitor
1254 fun get_name(s: String): String
1256 if not self.names.has(s) then
1260 var i = self.last + 1
1263 if not self.names.has(s2) then
1272 # Return an unique and stable identifier associated with an escapemark
1273 fun escapemark_name(e: nullable EscapeMark): String
1276 if escapemark_names.has_key(e) then return escapemark_names[e]
1278 if name == null then name = "label"
1279 name = get_name(name)
1280 escapemark_names[e] = name
1284 # Insert a C label for associated with an escapemark
1285 fun add_escape_label(e: nullable EscapeMark)
1287 if e == null then return
1288 if e.escapes.is_empty then return
1289 add("BREAK_{escapemark_name(e)}: (void)0;")
1292 private var escapemark_names = new HashMap[EscapeMark, String]
1294 # Return a "const char*" variable associated to the classname of the dynamic type of an object
1295 # NOTE: we do not return a `RuntimeVariable` "NativeString" as the class may not exist in the module/program
1296 fun class_name_string(value: RuntimeVariable): String is abstract
1298 # Variables handling
1300 protected var variables = new HashMap[Variable, RuntimeVariable]
1302 # Return the local runtime_variable associated to a Nit local variable
1303 fun variable(variable: Variable): RuntimeVariable
1305 if self.variables.has_key(variable) then
1306 return self.variables[variable]
1308 var name = self.get_name("var_{variable.name}")
1309 var mtype = variable.declared_type.as(not null)
1310 mtype = self.anchor(mtype)
1311 var res = new RuntimeVariable(name, mtype, mtype)
1312 self.add_decl("{mtype.ctype} {name} /* var {variable}: {mtype} */;")
1313 self.variables[variable] = res
1318 # Return a new uninitialized local runtime_variable
1319 fun new_var(mtype: MType): RuntimeVariable
1321 mtype = self.anchor(mtype)
1322 var name = self.get_name("var")
1323 var res = new RuntimeVariable(name, mtype, mtype)
1324 self.add_decl("{mtype.ctype} {name} /* : {mtype} */;")
1328 # The difference with `new_var
` is the C static type of the local variable
1329 fun new_var_extern(mtype: MType): RuntimeVariable
1331 mtype = self.anchor(mtype)
1332 var name = self.get_name("var")
1333 var res = new RuntimeVariable(name, mtype, mtype)
1334 self.add_decl("{mtype.ctype_extern} {name} /* : {mtype} for extern */;")
1338 # Return a new uninitialized named runtime_variable
1339 fun new_named_var(mtype: MType, name: String): RuntimeVariable
1341 mtype = self.anchor(mtype)
1342 var res = new RuntimeVariable(name, mtype, mtype)
1343 self.add_decl("{mtype.ctype} {name} /* : {mtype} */;")
1347 # Correctly assign a left and a right value
1348 # Boxing and unboxing is performed if required
1349 fun assign(left, right: RuntimeVariable)
1351 right = self.autobox(right, left.mtype)
1352 self.add("{left} = {right};")
1355 # Generate instances
1357 # Generate a alloc-instance + init-attributes
1358 fun init_instance(mtype: MClassType): RuntimeVariable is abstract
1360 # Set a GC finalizer on `recv
`, only if `recv
` isa Finalizable
1361 fun set_finalizer(recv: RuntimeVariable)
1363 var mtype = recv.mtype
1364 var finalizable_type = compiler.mainmodule.finalizable_type
1365 if finalizable_type != null and not mtype.need_anchor and
1366 mtype.is_subtype(compiler.mainmodule, null, finalizable_type) then
1367 add "gc_register_finalizer({recv});"
1371 # Generate an integer value
1372 fun int_instance(value: Int): RuntimeVariable
1374 var res = self.new_var(self.get_class("Int").mclass_type)
1375 self.add("{res} = {value};")
1379 # Generate an integer value
1380 fun bool_instance(value: Bool): RuntimeVariable
1382 var res = self.new_var(self.get_class("Bool").mclass_type)
1384 self.add("{res} = 1;")
1386 self.add("{res} = 0;")
1391 # Generate a string value
1392 fun string_instance(string: String): RuntimeVariable
1394 var mtype = self.get_class("String").mclass_type
1395 var name = self.get_name("varonce")
1396 self.add_decl("static {mtype.ctype} {name};")
1397 var res = self.new_var(mtype)
1398 self.add("if ({name}) \{")
1399 self.add("{res} = {name};")
1400 self.add("\} else \{")
1401 var native_mtype = self.get_class("NativeString").mclass_type
1402 var nat = self.new_var(native_mtype)
1403 self.add("{nat} = \"{string.escape_to_c}\";")
1404 var length = self.int_instance(string.length)
1405 self.add("{res} = {self.send(self.get_property("to_s_with_length", native_mtype), [nat, length]).as(not null)};")
1406 self.add("{name} = {res};")
1411 fun value_instance(object: Object): RuntimeVariable
1413 if object isa Int then
1414 return int_instance(object)
1415 else if object isa Bool then
1416 return bool_instance(object)
1417 else if object isa String then
1418 return string_instance(object)
1424 # Generate an array value
1425 fun array_instance(array: Array[RuntimeVariable], elttype: MType): RuntimeVariable is abstract
1427 # Get an instance of a array for a vararg
1428 fun vararg_instance(mpropdef: MPropDef, recv: RuntimeVariable, varargs: Array[RuntimeVariable], elttype: MType): RuntimeVariable is abstract
1432 # Add a line in the main part of the generated C
1433 fun add(s: String) do self.writer.lines.add(s)
1436 # (used for local or global declaration)
1437 fun add_decl(s: String) do self.writer.decl_lines.add(s)
1439 # Request the presence of a global declaration
1440 fun require_declaration(key: String)
1442 var reqs = self.writer.file.required_declarations
1443 if reqs.has(key) then return
1445 var node = current_node
1446 if node != null then compiler.requirers_of_declarations[key] = node
1449 # Add a declaration in the local-header
1450 # The declaration is ensured to be present once
1451 fun declare_once(s: String)
1453 self.compiler.provide_declaration(s, s)
1454 self.require_declaration(s)
1457 # look for a needed .h and .c file for a given .nit source-file
1458 # FIXME: bad API, parameter should be a `MModule`, not its source-file
1459 fun add_extern(file: String)
1461 file = file.strip_extension(".nit")
1462 var tryfile = file + ".nit.h"
1463 if tryfile.file_exists then
1464 self.declare_once("#include \"{tryfile.basename("")}\"")
1465 self.compiler.files_to_copy.add(tryfile)
1467 tryfile = file + "_nit.h"
1468 if tryfile.file_exists then
1469 self.declare_once("#include \"{tryfile.basename("")}\"")
1470 self.compiler.files_to_copy.add(tryfile)
1473 if self.compiler.seen_extern.has(file) then return
1474 self.compiler.seen_extern.add(file)
1475 tryfile = file + ".nit.c"
1476 if not tryfile.file_exists then
1477 tryfile = file + "_nit.c"
1478 if not tryfile.file_exists then return
1480 var f = new ExternCFile(tryfile.basename(""), "")
1481 self.compiler.extern_bodies.add(f)
1482 self.compiler.files_to_copy.add(tryfile)
1485 # Return a new local runtime_variable initialized with the C expression `cexpr
`.
1486 fun new_expr(cexpr: String, mtype: MType): RuntimeVariable
1488 var res = new_var(mtype)
1489 self.add("{res} = {cexpr};")
1493 # Generate generic abort
1494 # used by aborts, asserts, casts, etc.
1495 fun add_abort(message: String)
1497 self.add("PRINT_ERROR(\"Runtime error: %s\", \"{message.escape_to_c}\");")
1503 if self.current_node != null and self.current_node.location.file != null then
1504 self.add("PRINT_ERROR(\" (%s:%d)\\n\", \"{self.current_node.location.file.filename.escape_to_c}\", {current_node.location.line_start});")
1506 self.add("PRINT_ERROR(\"\\n\");")
1508 self.add("show_backtrace(1);")
1511 # Add a dynamic cast
1512 fun add_cast(value: RuntimeVariable, mtype: MType, tag: String)
1514 var res = self.type_test(value, mtype, tag)
1515 self.add("if (unlikely(!{res})) \{")
1516 var cn = self.class_name_string(value)
1517 self.add("PRINT_ERROR(\"Runtime error: Cast failed. Expected `%s
`, got `%s
`\", \"{mtype.to_s.escape_to_c}\", {cn});")
1522 # Generate a return with the value `s
`
1523 fun ret(s: RuntimeVariable)
1525 self.assign(self.frame.returnvar.as(not null), s)
1526 self.add("goto {self.frame.returnlabel.as(not null)};")
1529 # Compile a statement (if any)
1530 fun stmt(nexpr: nullable AExpr)
1532 if nexpr == null then return
1533 var old = self.current_node
1534 self.current_node = nexpr
1536 self.current_node = old
1539 # Compile an expression an return its result
1540 # `mtype
` is the expected return type, pass null if no specific type is expected.
1541 fun expr(nexpr: AExpr, mtype: nullable MType): RuntimeVariable
1543 var old = self.current_node
1544 self.current_node = nexpr
1545 var res = nexpr.expr(self).as(not null)
1546 if mtype != null then
1547 mtype = self.anchor(mtype)
1548 res = self.autobox(res, mtype)
1550 res = autoadapt(res, nexpr.mtype.as(not null))
1551 var implicit_cast_to = nexpr.implicit_cast_to
1552 if implicit_cast_to != null and not self.compiler.modelbuilder.toolcontext.opt_no_check_autocast.value then
1553 add_cast(res, implicit_cast_to, "auto")
1554 res = autoadapt(res, implicit_cast_to)
1556 self.current_node = old
1560 # Alias for `self.expr
(nexpr
, self.bool_type
)`
1561 fun expr_bool(nexpr: AExpr): RuntimeVariable do return expr(nexpr, bool_type)
1563 # Safely show a debug message on the current node and repeat the message in the C code as a comment
1564 fun debug(message: String)
1566 var node = self.current_node
1567 if node == null then
1568 print "?: {message}"
1572 self.add("/* DEBUG: {message} */")
1576 # A C function associated to a Nit method
1577 # Because of customization, a given Nit method can be compiler more that once
1578 abstract class AbstractRuntimeFunction
1580 type COMPILER: AbstractCompiler
1581 type VISITOR: AbstractCompilerVisitor
1583 # The associated Nit method
1584 var mmethoddef: MMethodDef
1586 # The mangled c name of the runtime_function
1587 # Subclasses should redefine `build_c_name
` instead
1590 var res = self.c_name_cache
1591 if res != null then return res
1592 res = self.build_c_name
1593 self.c_name_cache = res
1597 # Non cached version of `c_name
`
1598 protected fun build_c_name: String is abstract
1600 protected var c_name_cache: nullable String = null is writable
1602 # Implements a call of the runtime_function
1603 # May inline the body or generate a C function call
1604 fun call(v: VISITOR, arguments: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1606 # Generate the code for the `AbstractRuntimeFunction`
1607 # Warning: compile more than once compilation makes CC unhappy
1608 fun compile_to_c(compiler: COMPILER) is abstract
1611 # A runtime variable hold a runtime value in C.
1612 # Runtime variables are associated to Nit local variables and intermediate results in Nit expressions.
1614 # 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.
1615 class RuntimeVariable
1616 # The name of the variable in the C code
1619 # The static type of the variable (as declard in C)
1622 # The current casted type of the variable (as known in Nit)
1623 var mcasttype: MType is writable
1625 # If the variable exaclty a mcasttype?
1626 # false (usual value) means that the variable is a mcasttype or a subtype.
1627 var is_exact: Bool = false is writable
1631 assert not mtype.need_anchor
1632 assert not mcasttype.need_anchor
1635 redef fun to_s do return name
1640 if self.is_exact then
1641 exact_str = " exact"
1646 if self.mtype == self.mcasttype then
1647 type_str = "{mtype}{exact_str}"
1649 type_str = "{mtype}({mcasttype}{exact_str})"
1651 return "<{name}:{type_str}>"
1655 # A frame correspond to a visited property in a `GlobalCompilerVisitor`
1658 type VISITOR: AbstractCompilerVisitor
1660 # The associated visitor
1661 var visitor: VISITOR
1663 # The executed property.
1664 # A Method in case of a call, an attribute in case of a default initialization.
1665 var mpropdef: MPropDef
1667 # The static type of the receiver
1668 var receiver: MClassType
1670 # Arguments of the method (the first is the receiver)
1671 var arguments: Array[RuntimeVariable]
1673 # The runtime_variable associated to the return (in a function)
1674 var returnvar: nullable RuntimeVariable = null is writable
1676 # The label at the end of the property
1677 var returnlabel: nullable String = null is writable
1681 # Return the C type associated to a given Nit static type
1682 fun ctype: String do return "val*"
1684 # C type outside of the compiler code and in boxes
1685 fun ctype_extern: String do return "val*"
1687 # Short name of the `ctype
` to use in unions
1688 fun ctypename: String do return "val"
1690 # Return the name of the C structure associated to a Nit live type
1691 fun c_name: String is abstract
1692 protected var c_name_cache: nullable String is protected writable
1695 redef class MClassType
1698 var res = self.c_name_cache
1699 if res != null then return res
1700 res = "{mclass.intro_mmodule.c_name}__{mclass.name.to_cmangle}"
1701 self.c_name_cache = res
1705 redef fun ctype: String
1707 if mclass.name == "Int" then
1709 else if mclass.name == "Bool" then
1711 else if mclass.name == "Char" then
1713 else if mclass.name == "Float" then
1715 else if mclass.name == "NativeString" then
1717 else if mclass.name == "NativeArray" then
1724 redef fun ctype_extern: String
1726 if mclass.kind == extern_kind then
1733 redef fun ctypename: String
1735 if mclass.name == "Int" then
1737 else if mclass.name == "Bool" then
1739 else if mclass.name == "Char" then
1741 else if mclass.name == "Float" then
1743 else if mclass.name == "NativeString" then
1745 else if mclass.name == "NativeArray" then
1746 #return "{self.arguments.first.ctype}*"
1754 redef class MGenericType
1757 var res = self.c_name_cache
1758 if res != null then return res
1760 for t in self.arguments do
1761 res = res + t.c_name
1763 self.c_name_cache = res
1768 redef class MParameterType
1771 var res = self.c_name_cache
1772 if res != null then return res
1773 res = "{self.mclass.c_name}_FT{self.rank}"
1774 self.c_name_cache = res
1779 redef class MVirtualType
1782 var res = self.c_name_cache
1783 if res != null then return res
1784 res = "{self.mproperty.intro.mclassdef.mclass.c_name}_VT{self.mproperty.name}"
1785 self.c_name_cache = res
1790 redef class MNullableType
1793 var res = self.c_name_cache
1794 if res != null then return res
1795 res = "nullable_{self.mtype.c_name}"
1796 self.c_name_cache = res
1802 # Return the name of the C structure associated to a Nit class
1803 fun c_name: String do
1804 var res = self.c_name_cache
1805 if res != null then return res
1806 res = "{intro_mmodule.c_name}__{name.to_cmangle}"
1807 self.c_name_cache = res
1810 private var c_name_cache: nullable String
1813 redef class MProperty
1814 fun c_name: String do
1815 var res = self.c_name_cache
1816 if res != null then return res
1817 res = "{self.intro.c_name}"
1818 self.c_name_cache = res
1821 private var c_name_cache: nullable String
1824 redef class MPropDef
1825 type VISITOR: AbstractCompilerVisitor
1827 private var c_name_cache: nullable String
1829 # The mangled name associated to the property
1832 var res = self.c_name_cache
1833 if res != null then return res
1834 res = "{self.mclassdef.mmodule.c_name}__{self.mclassdef.mclass.name.to_cmangle}__{self.mproperty.name.to_cmangle}"
1835 self.c_name_cache = res
1840 redef class MMethodDef
1841 # Can the body be inlined?
1842 fun can_inline(v: VISITOR): Bool
1844 if is_abstract then return true
1845 var modelbuilder = v.compiler.modelbuilder
1846 if modelbuilder.mpropdef2npropdef.has_key(self) then
1847 var npropdef = modelbuilder.mpropdef2npropdef[self]
1848 return npropdef.can_inline
1849 else if self.mproperty.is_root_init then
1850 # Automatic free init is always inlined since it is empty or contains only attribtes assigments
1857 # Inline the body in another visitor
1858 fun compile_inside_to_c(v: VISITOR, arguments: Array[RuntimeVariable]): nullable RuntimeVariable
1860 var modelbuilder = v.compiler.modelbuilder
1861 var val = constant_value
1862 if modelbuilder.mpropdef2npropdef.has_key(self) then
1863 var npropdef = modelbuilder.mpropdef2npropdef[self]
1864 var oldnode = v.current_node
1865 v.current_node = npropdef
1866 self.compile_parameter_check(v, arguments)
1867 npropdef.compile_to_c(v, self, arguments)
1868 v.current_node = oldnode
1869 else if self.mproperty.is_root_init then
1870 var nclassdef = modelbuilder.mclassdef2nclassdef[self.mclassdef]
1871 var oldnode = v.current_node
1872 v.current_node = nclassdef
1873 self.compile_parameter_check(v, arguments)
1874 nclassdef.compile_to_c(v, self, arguments)
1875 v.current_node = oldnode
1876 else if val != null then
1877 v.ret(v.value_instance(val))
1884 # Generate type checks in the C code to check covariant parameters
1885 fun compile_parameter_check(v: VISITOR, arguments: Array[RuntimeVariable])
1887 if v.compiler.modelbuilder.toolcontext.opt_no_check_covariance.value then return
1889 for i in [0..msignature.arity[ do
1890 # skip test for vararg since the array is instantiated with the correct polymorphic type
1891 if msignature.vararg_rank == i then continue
1893 # skip if the cast is not required
1894 var origmtype = self.mproperty.intro.msignature.mparameters[i].mtype
1895 if not origmtype.need_anchor then continue
1897 # get the parameter type
1898 var mtype = self.msignature.mparameters[i].mtype
1901 # note that v decides if and how to implements the cast
1902 v.add("/* Covariant cast for argument {i} ({self.msignature.mparameters[i].name}) {arguments[i+1].inspect} isa {mtype} */")
1903 v.add_cast(arguments[i+1], mtype, "covariance")
1910 redef class APropdef
1911 fun compile_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
1913 v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name} {mpropdef} at {location.to_s}\\n\");")
1914 debug("Not yet implemented")
1917 fun can_inline: Bool do return true
1920 redef class AMethPropdef
1921 redef fun compile_to_c(v, mpropdef, arguments)
1923 if mpropdef.is_abstract then
1924 var cn = v.class_name_string(arguments.first)
1925 v.add("PRINT_ERROR(\"Runtime error: Abstract method `%s
` called on `%s
`\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
1930 # Call the implicit super-init
1931 var auto_super_inits = self.auto_super_inits
1932 if auto_super_inits != null then
1933 var args = [arguments.first]
1934 for auto_super_init in auto_super_inits do
1935 assert auto_super_init.mproperty != mpropdef.mproperty
1937 for i in [0..auto_super_init.msignature.arity+1[ do
1938 args.add(arguments[i])
1940 assert auto_super_init.mproperty != mpropdef.mproperty
1941 v.compile_callsite(auto_super_init, args)
1944 if auto_super_call then
1945 v.supercall(mpropdef, arguments.first.mtype.as(MClassType), arguments)
1948 # Try special compilation
1949 if mpropdef.is_intern then
1950 if compile_intern_to_c(v, mpropdef, arguments) then return
1951 else if mpropdef.is_extern then
1952 if mpropdef.mproperty.is_init then
1953 if compile_externinit_to_c(v, mpropdef, arguments) then return
1955 if compile_externmeth_to_c(v, mpropdef, arguments) then return
1959 # Compile block if any
1960 var n_block = n_block
1961 if n_block != null then
1962 for i in [0..mpropdef.msignature.arity[ do
1963 var variable = self.n_signature.n_params[i].variable.as(not null)
1964 v.assign(v.variable(variable), arguments[i+1])
1971 var cn = v.class_name_string(arguments.first)
1972 v.add("PRINT_ERROR(\"Runtime error: uncompiled method `%s
` called on `%s
`. NOT YET IMPLEMENTED\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
1976 redef fun can_inline
1978 if self.auto_super_inits != null then return false
1979 var nblock = self.n_block
1980 if nblock == null then return true
1981 if (mpropdef.mproperty.name == "==" or mpropdef.mproperty.name == "!=") and mpropdef.mclassdef.mclass.name == "Object" then return true
1982 if nblock isa ABlockExpr and nblock.n_expr.length == 0 then return true
1986 fun compile_intern_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
1988 var pname = mpropdef.mproperty.name
1989 var cname = mpropdef.mclassdef.mclass.name
1990 var ret = mpropdef.msignature.return_mtype
1992 ret = v.resolve_for(ret, arguments.first)
1994 if pname != "==" and pname != "!=" then
1995 v.adapt_signature(mpropdef, arguments)
1996 v.unbox_signature_extern(mpropdef, arguments)
1998 if cname == "Int" then
1999 if pname == "output" then
2000 v.add("printf(\"%ld\\n\", {arguments.first});")
2002 else if pname == "object_id" then
2003 v.ret(arguments.first)
2005 else if pname == "+" then
2006 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2008 else if pname == "-" then
2009 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2011 else if pname == "unary -" then
2012 v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
2014 else if pname == "*" then
2015 v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
2017 else if pname == "/" then
2018 v.ret(v.new_expr("{arguments[0]} / {arguments[1]}", ret.as(not null)))
2020 else if pname == "%" then
2021 v.ret(v.new_expr("{arguments[0]} % {arguments[1]}", ret.as(not null)))
2023 else if pname == "lshift" then
2024 v.ret(v.new_expr("{arguments[0]} << {arguments[1]}", ret.as(not null)))
2026 else if pname == "rshift" then
2027 v.ret(v.new_expr("{arguments[0]} >> {arguments[1]}", ret.as(not null)))
2029 else if pname == "==" then
2030 v.ret(v.equal_test(arguments[0], arguments[1]))
2032 else if pname == "!=" then
2033 var res = v.equal_test(arguments[0], arguments[1])
2034 v.ret(v.new_expr("!{res}", ret.as(not null)))
2036 else if pname == "<" then
2037 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2039 else if pname == ">" then
2040 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2042 else if pname == "<=" then
2043 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2045 else if pname == ">=" then
2046 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2048 else if pname == "to_f" then
2049 v.ret(v.new_expr("(double){arguments[0]}", ret.as(not null)))
2051 else if pname == "ascii" then
2052 v.ret(v.new_expr("{arguments[0]}", ret.as(not null)))
2055 else if cname == "Char" then
2056 if pname == "output" then
2057 v.add("printf(\"%c\", {arguments.first});")
2059 else if pname == "object_id" then
2060 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2062 else if pname == "successor" then
2063 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2065 else if pname == "predecessor" then
2066 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2068 else if pname == "==" then
2069 v.ret(v.equal_test(arguments[0], arguments[1]))
2071 else if pname == "!=" then
2072 var res = v.equal_test(arguments[0], arguments[1])
2073 v.ret(v.new_expr("!{res}", ret.as(not null)))
2075 else if pname == "<" then
2076 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2078 else if pname == ">" then
2079 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2081 else if pname == "<=" then
2082 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2084 else if pname == ">=" then
2085 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2087 else if pname == "to_i" then
2088 v.ret(v.new_expr("{arguments[0]}-'0'", ret.as(not null)))
2090 else if pname == "ascii" then
2091 v.ret(v.new_expr("(unsigned char){arguments[0]}", ret.as(not null)))
2094 else if cname == "Bool" then
2095 if pname == "output" then
2096 v.add("printf({arguments.first}?\"true\\n\":\"false\\n\");")
2098 else if pname == "object_id" then
2099 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2101 else if pname == "==" then
2102 v.ret(v.equal_test(arguments[0], arguments[1]))
2104 else if pname == "!=" then
2105 var res = v.equal_test(arguments[0], arguments[1])
2106 v.ret(v.new_expr("!{res}", ret.as(not null)))
2109 else if cname == "Float" then
2110 if pname == "output" then
2111 v.add("printf(\"%f\\n\", {arguments.first});")
2113 else if pname == "object_id" then
2114 v.ret(v.new_expr("(double){arguments.first}", ret.as(not null)))
2116 else if pname == "+" then
2117 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2119 else if pname == "-" then
2120 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2122 else if pname == "unary -" then
2123 v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
2125 else if pname == "succ" then
2126 v.ret(v.new_expr("{arguments[0]}+1", ret.as(not null)))
2128 else if pname == "prec" then
2129 v.ret(v.new_expr("{arguments[0]}-1", ret.as(not null)))
2131 else if pname == "*" then
2132 v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
2134 else if pname == "/" then
2135 v.ret(v.new_expr("{arguments[0]} / {arguments[1]}", ret.as(not null)))
2137 else if pname == "==" then
2138 v.ret(v.equal_test(arguments[0], arguments[1]))
2140 else if pname == "!=" then
2141 var res = v.equal_test(arguments[0], arguments[1])
2142 v.ret(v.new_expr("!{res}", ret.as(not null)))
2144 else if pname == "<" then
2145 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2147 else if pname == ">" then
2148 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2150 else if pname == "<=" then
2151 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2153 else if pname == ">=" then
2154 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2156 else if pname == "to_i" then
2157 v.ret(v.new_expr("(long){arguments[0]}", ret.as(not null)))
2160 else if cname == "NativeString" then
2161 if pname == "[]" then
2162 v.ret(v.new_expr("{arguments[0]}[{arguments[1]}]", ret.as(not null)))
2164 else if pname == "[]=" then
2165 v.add("{arguments[0]}[{arguments[1]}]={arguments[2]};")
2167 else if pname == "copy_to" then
2168 v.add("memmove({arguments[1]}+{arguments[4]},{arguments[0]}+{arguments[3]},{arguments[2]});")
2170 else if pname == "atoi" then
2171 v.ret(v.new_expr("atoi({arguments[0]});", ret.as(not null)))
2173 else if pname == "new" then
2174 v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
2177 else if cname == "NativeArray" then
2178 v.native_array_def(pname, ret, arguments)
2181 if pname == "exit" then
2182 v.add("exit({arguments[1]});")
2184 else if pname == "sys" then
2185 v.ret(v.new_expr("glob_sys", ret.as(not null)))
2187 else if pname == "calloc_string" then
2188 v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
2190 else if pname == "calloc_array" then
2191 v.calloc_array(ret.as(not null), arguments)
2193 else if pname == "object_id" then
2194 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2196 else if pname == "is_same_type" then
2197 v.ret(v.is_same_type_test(arguments[0], arguments[1]))
2199 else if pname == "is_same_instance" then
2200 v.ret(v.equal_test(arguments[0], arguments[1]))
2202 else if pname == "output_class_name" then
2203 var nat = v.class_name_string(arguments.first)
2204 v.add("printf(\"%s\\n\", {nat});")
2206 else if pname == "native_class_name" then
2207 var nat = v.class_name_string(arguments.first)
2208 v.ret(v.new_expr("(char*){nat}", ret.as(not null)))
2210 else if pname == "force_garbage_collection" then
2211 v.add("nit_gcollect();")
2213 else if pname == "native_argc" then
2214 v.ret(v.new_expr("glob_argc", ret.as(not null)))
2216 else if pname == "native_argv" then
2217 v.ret(v.new_expr("glob_argv[{arguments[1]}]", ret.as(not null)))
2223 # Compile an extern method
2224 # Return `true` if the compilation was successful, `false` if a fall-back is needed
2225 fun compile_externmeth_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2228 var at = self.get_single_annotation("extern", v.compiler.modelbuilder)
2230 externname = at.arg_as_string(v.compiler.modelbuilder)
2231 if externname == null then return false
2235 if location.file != null then
2236 var file = location.file.filename
2239 var res: nullable RuntimeVariable = null
2240 var ret = mpropdef.msignature.return_mtype
2242 ret = v.resolve_for(ret, arguments.first)
2243 res = v.new_var_extern(ret)
2245 v.adapt_signature(mpropdef, arguments)
2246 v.unbox_signature_extern(mpropdef, arguments)
2249 v.add("{externname}({arguments.join(", ")});")
2251 v.add("{res} = {externname}({arguments.join(", ")});")
2252 res = v.box_extern(res, ret.as(not null))
2258 # Compile an extern factory
2259 # Return `true` if the compilation was successful, `false` if a fall-back is needed
2260 fun compile_externinit_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2263 var at = self.get_single_annotation("extern", v.compiler.modelbuilder)
2265 externname = at.arg_as_string(v.compiler.modelbuilder)
2266 if externname == null then return false
2270 if location.file != null then
2271 var file = location.file.filename
2274 v.adapt_signature(mpropdef, arguments)
2275 v.unbox_signature_extern(mpropdef, arguments)
2276 var ret = arguments.first.mtype
2277 var res = v.new_var_extern(ret)
2281 v.add("{res} = {externname}({arguments.join(", ")});")
2282 res = v.box_extern(res, ret)
2288 redef class AAttrPropdef
2289 redef fun compile_to_c(v, mpropdef, arguments)
2291 if mpropdef == mreadpropdef then
2292 assert arguments.length == 1
2293 var recv = arguments.first
2297 var ret = self.mpropdef.static_mtype
2298 var useiset = ret.ctype == "val*" and not ret isa MNullableType
2299 var guard = self.mlazypropdef.mproperty
2301 set = v.isset_attribute(self.mpropdef.mproperty, recv)
2303 set = v.read_attribute(guard, recv)
2305 v.add("if(likely({set})) \{")
2306 res = v.read_attribute(self.mpropdef.mproperty, recv)
2309 var value = evaluate_expr(v, recv)
2311 v.assign(res, value)
2313 var true_v = v.new_expr("1", v.bool_type)
2314 v.write_attribute(guard, arguments.first, true_v)
2318 res = v.read_attribute(self.mpropdef.mproperty, arguments.first)
2320 v.assign(v.frame.returnvar.as(not null), res)
2321 else if mpropdef == mwritepropdef then
2322 assert arguments.length == 2
2323 v.write_attribute(self.mpropdef.mproperty, arguments.first, arguments[1])
2325 var ret = self.mpropdef.static_mtype
2326 var useiset = ret.ctype == "val*" and not ret isa MNullableType
2328 v.write_attribute(self.mlazypropdef.mproperty, arguments.first, v.new_expr("1", v.bool_type))
2336 fun init_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable)
2338 if has_value and not is_lazy then evaluate_expr(v, recv)
2341 # Evaluate, store and return the default value of the attribute
2342 private fun evaluate_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable): RuntimeVariable
2344 var oldnode = v.current_node
2345 v.current_node = self
2346 var old_frame = v.frame
2347 var frame = new Frame(v, self.mpropdef.as(not null), recv.mcasttype.as(MClassType), [recv])
2351 var mtype = self.mpropdef.static_mtype
2352 assert mtype != null
2354 var nexpr = self.n_expr
2355 var nblock = self.n_block
2356 if nexpr != null then
2357 value = v.expr(nexpr, mtype)
2358 else if nblock != null then
2359 value = v.new_var(mtype)
2360 frame.returnvar = value
2361 frame.returnlabel = v.get_name("RET_LABEL")
2364 v.add("{frame.returnlabel.as(not null)}:(void)0;")
2370 v.write_attribute(self.mpropdef.mproperty, recv, value)
2373 v.current_node = oldnode
2378 fun check_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable)
2380 var nexpr = self.n_expr
2381 if nexpr != null then return
2383 var oldnode = v.current_node
2384 v.current_node = self
2385 var old_frame = v.frame
2386 var frame = new Frame(v, self.mpropdef.as(not null), recv.mtype.as(MClassType), [recv])
2388 # Force read to check the initialization
2389 v.read_attribute(self.mpropdef.mproperty, recv)
2391 v.current_node = oldnode
2395 redef class AClassdef
2396 private fun compile_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
2398 if mpropdef == self.mfree_init then
2399 assert mpropdef.mproperty.is_root_init
2400 assert arguments.length == 1
2401 if not mpropdef.is_intro then
2402 v.supercall(mpropdef, arguments.first.mtype.as(MClassType), arguments)
2412 # Try to compile self as an expression
2413 # Do not call this method directly, use `v
.expr
` instead
2414 private fun expr(v: AbstractCompilerVisitor): nullable RuntimeVariable
2416 v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name}:{location.to_s}\\n\");")
2417 var mtype = self.mtype
2418 if mtype == null then
2421 var res = v.new_var(mtype)
2422 v.add("/* {res} = NOT YET {class_name} */")
2427 # Try to compile self as a statement
2428 # Do not call this method directly, use `v
.stmt
` instead
2429 private fun stmt(v: AbstractCompilerVisitor)
2435 redef class ABlockExpr
2438 for e in self.n_expr do v.stmt(e)
2442 var last = self.n_expr.last
2443 for e in self.n_expr do
2444 if e == last then break
2447 return v.expr(last, null)
2451 redef class AVardeclExpr
2454 var variable = self.variable.as(not null)
2455 var ne = self.n_expr
2457 var i = v.expr(ne, variable.declared_type)
2458 v.assign(v.variable(variable), i)
2463 redef class AVarExpr
2466 var res = v.variable(self.variable.as(not null))
2467 var mtype = self.mtype.as(not null)
2468 return v.autoadapt(res, mtype)
2472 redef class AVarAssignExpr
2475 var variable = self.variable.as(not null)
2476 var i = v.expr(self.n_value, variable.declared_type)
2477 v.assign(v.variable(variable), i)
2482 redef class AVarReassignExpr
2485 var variable = self.variable.as(not null)
2486 var vari = v.variable(variable)
2487 var value = v.expr(self.n_value, variable.declared_type)
2488 var res = v.compile_callsite(self.reassign_callsite.as(not null), [vari, value])
2490 v.assign(v.variable(variable), res)
2494 redef class ASelfExpr
2495 redef fun expr(v) do return v.frame.arguments.first
2498 redef class AEscapeExpr
2499 redef fun stmt(v) do v.add("goto BREAK_{v.escapemark_name(self.escapemark)};")
2502 redef class AReturnExpr
2505 var nexpr = self.n_expr
2506 if nexpr != null then
2507 var returnvar = v.frame.returnvar.as(not null)
2508 var i = v.expr(nexpr, returnvar.mtype)
2509 v.assign(returnvar, i)
2511 v.add("goto {v.frame.returnlabel.as(not null)};")
2515 redef class AAbortExpr
2516 redef fun stmt(v) do v.add_abort("Aborted")
2522 var cond = v.expr_bool(self.n_expr)
2523 v.add("if ({cond})\{")
2532 var res = v.new_var(self.mtype.as(not null))
2533 var cond = v.expr_bool(self.n_expr)
2534 v.add("if ({cond})\{")
2535 v.assign(res, v.expr(self.n_then.as(not null), null))
2537 v.assign(res, v.expr(self.n_else.as(not null), null))
2543 redef class AIfexprExpr
2546 var res = v.new_var(self.mtype.as(not null))
2547 var cond = v.expr_bool(self.n_expr)
2548 v.add("if ({cond})\{")
2549 v.assign(res, v.expr(self.n_then, null))
2551 v.assign(res, v.expr(self.n_else, null))
2560 v.stmt(self.n_block)
2561 v.add_escape_label(break_mark)
2565 redef class AWhileExpr
2569 var cond = v.expr_bool(self.n_expr)
2570 v.add("if (!{cond}) break;")
2571 v.stmt(self.n_block)
2572 v.add_escape_label(continue_mark)
2574 v.add_escape_label(break_mark)
2578 redef class ALoopExpr
2582 v.stmt(self.n_block)
2583 v.add_escape_label(continue_mark)
2585 v.add_escape_label(break_mark)
2589 redef class AForExpr
2592 var cl = v.expr(self.n_expr, null)
2593 var it_meth = self.method_iterator
2594 assert it_meth != null
2595 var it = v.compile_callsite(it_meth, [cl])
2598 var isok_meth = self.method_is_ok
2599 assert isok_meth != null
2600 var ok = v.compile_callsite(isok_meth, [it])
2602 v.add("if(!{ok}) break;")
2603 if self.variables.length == 1 then
2604 var item_meth = self.method_item
2605 assert item_meth != null
2606 var i = v.compile_callsite(item_meth, [it])
2608 v.assign(v.variable(variables.first), i)
2609 else if self.variables.length == 2 then
2610 var key_meth = self.method_key
2611 assert key_meth != null
2612 var i = v.compile_callsite(key_meth, [it])
2614 v.assign(v.variable(variables[0]), i)
2615 var item_meth = self.method_item
2616 assert item_meth != null
2617 i = v.compile_callsite(item_meth, [it])
2619 v.assign(v.variable(variables[1]), i)
2623 v.stmt(self.n_block)
2624 v.add_escape_label(continue_mark)
2625 var next_meth = self.method_next
2626 assert next_meth != null
2627 v.compile_callsite(next_meth, [it])
2629 v.add_escape_label(break_mark)
2631 var method_finish = self.method_finish
2632 if method_finish != null then
2633 # TODO: Find a way to call this also in long escape (e.g. return)
2634 v.compile_callsite(method_finish, [it])
2639 redef class AAssertExpr
2642 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return
2644 var cond = v.expr_bool(self.n_expr)
2645 v.add("if (unlikely(!{cond})) \{")
2649 v.add_abort("Assert '{nid.text}' failed")
2651 v.add_abort("Assert failed")
2660 var res = v.new_var(self.mtype.as(not null))
2661 var i1 = v.expr_bool(self.n_expr)
2662 v.add("if ({i1}) \{")
2665 var i2 = v.expr_bool(self.n_expr2)
2666 v.add("{res} = {i2};")
2672 redef class AImpliesExpr
2675 var res = v.new_var(self.mtype.as(not null))
2676 var i1 = v.expr_bool(self.n_expr)
2677 v.add("if (!{i1}) \{")
2680 var i2 = v.expr_bool(self.n_expr2)
2681 v.add("{res} = {i2};")
2687 redef class AAndExpr
2690 var res = v.new_var(self.mtype.as(not null))
2691 var i1 = v.expr_bool(self.n_expr)
2692 v.add("if (!{i1}) \{")
2695 var i2 = v.expr_bool(self.n_expr2)
2696 v.add("{res} = {i2};")
2702 redef class ANotExpr
2705 var cond = v.expr_bool(self.n_expr)
2706 return v.new_expr("!{cond}", self.mtype.as(not null))
2710 redef class AOrElseExpr
2713 var res = v.new_var(self.mtype.as(not null))
2714 var i1 = v.expr(self.n_expr, null)
2715 v.add("if ({i1}!=NULL) \{")
2718 var i2 = v.expr(self.n_expr2, null)
2725 redef class AIntExpr
2726 redef fun expr(v) do return v.new_expr("{self.value.to_s}", self.mtype.as(not null))
2729 redef class AFloatExpr
2730 redef fun expr(v) do return v.new_expr("{self.n_float.text}", self.mtype.as(not null)) # FIXME use value, not n_float
2733 redef class ACharExpr
2734 redef fun expr(v) do return v.new_expr("'{self.value.to_s.escape_to_c}'", self.mtype.as(not null))
2737 redef class AArrayExpr
2740 var mtype = self.mtype.as(MClassType).arguments.first
2741 var array = new Array[RuntimeVariable]
2742 for nexpr in self.n_exprs.n_exprs do
2743 var i = v.expr(nexpr, mtype)
2746 return v.array_instance(array, mtype)
2750 redef class AStringFormExpr
2751 redef fun expr(v) do return v.string_instance(self.value.as(not null))
2754 redef class ASuperstringExpr
2757 var array = new Array[RuntimeVariable]
2758 for ne in self.n_exprs do
2759 if ne isa AStringFormExpr and ne.value == "" then continue # skip empty sub-strings
2760 var i = v.expr(ne, null)
2763 var a = v.array_instance(array, v.object_type)
2764 var res = v.send(v.get_property("to_s", a.mtype), [a])
2769 redef class ACrangeExpr
2772 var i1 = v.expr(self.n_expr, null)
2773 var i2 = v.expr(self.n_expr2, null)
2774 var mtype = self.mtype.as(MClassType)
2775 var res = v.init_instance(mtype)
2776 v.compile_callsite(init_callsite.as(not null), [res, i1, i2])
2781 redef class AOrangeExpr
2784 var i1 = v.expr(self.n_expr, null)
2785 var i2 = v.expr(self.n_expr2, null)
2786 var mtype = self.mtype.as(MClassType)
2787 var res = v.init_instance(mtype)
2788 v.compile_callsite(init_callsite.as(not null), [res, i1, i2])
2793 redef class ATrueExpr
2794 redef fun expr(v) do return v.new_expr("1", self.mtype.as(not null))
2797 redef class AFalseExpr
2798 redef fun expr(v) do return v.new_expr("0", self.mtype.as(not null))
2801 redef class ANullExpr
2802 redef fun expr(v) do return v.new_expr("NULL", self.mtype.as(not null))
2805 redef class AIsaExpr
2808 var i = v.expr(self.n_expr, null)
2809 return v.type_test(i, self.cast_type.as(not null), "isa")
2813 redef class AAsCastExpr
2816 var i = v.expr(self.n_expr, null)
2817 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return i
2819 v.add_cast(i, self.mtype.as(not null), "as")
2824 redef class AAsNotnullExpr
2827 var i = v.expr(self.n_expr, null)
2828 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return i
2830 if i.mtype.ctype != "val*" then return i
2832 v.add("if (unlikely({i} == NULL)) \{")
2833 v.add_abort("Cast failed")
2839 redef class AParExpr
2840 redef fun expr(v) do return v.expr(self.n_expr, null)
2843 redef class AOnceExpr
2846 var mtype = self.mtype.as(not null)
2847 var name = v.get_name("varonce")
2848 var guard = v.get_name(name + "_guard")
2849 v.add_decl("static {mtype.ctype} {name};")
2850 v.add_decl("static int {guard};")
2851 var res = v.new_var(mtype)
2852 v.add("if ({guard}) \{")
2853 v.add("{res} = {name};")
2855 var i = v.expr(self.n_expr, mtype)
2856 v.add("{res} = {i};")
2857 v.add("{name} = {res};")
2858 v.add("{guard} = 1;")
2864 redef class ASendExpr
2867 var recv = v.expr(self.n_expr, null)
2868 var callsite = self.callsite.as(not null)
2869 var args = v.varargize(callsite.mpropdef, recv, self.raw_arguments)
2870 return v.compile_callsite(callsite, args)
2874 redef class ASendReassignFormExpr
2877 var recv = v.expr(self.n_expr, null)
2878 var callsite = self.callsite.as(not null)
2879 var args = v.varargize(callsite.mpropdef, recv, self.raw_arguments)
2881 var value = v.expr(self.n_value, null)
2883 var left = v.compile_callsite(callsite, args)
2886 var res = v.compile_callsite(self.reassign_callsite.as(not null), [left, value])
2890 v.compile_callsite(self.write_callsite.as(not null), args)
2894 redef class ASuperExpr
2897 var recv = v.frame.arguments.first
2899 var callsite = self.callsite
2900 if callsite != null then
2901 var args = v.varargize(callsite.mpropdef, recv, self.n_args.n_exprs)
2903 # Add additional arguments for the super init call
2904 if args.length == 1 then
2905 for i in [0..callsite.msignature.arity[ do
2906 args.add(v.frame.arguments[i+1])
2910 var res = v.compile_callsite(callsite, args)
2914 var mpropdef = self.mpropdef.as(not null)
2915 var args = v.varargize(mpropdef, recv, self.n_args.n_exprs)
2916 if args.length == 1 then
2917 args = v.frame.arguments
2920 # stantard call-next-method
2921 return v.supercall(mpropdef, recv.mtype.as(MClassType), args)
2925 redef class ANewExpr
2928 var mtype = self.recvtype
2929 assert mtype != null
2931 var ctype = mtype.ctype
2932 if mtype.mclass.name == "NativeArray" then
2933 assert self.n_args.n_exprs.length == 1
2934 var l = v.expr(self.n_args.n_exprs.first, null)
2935 assert mtype isa MGenericType
2936 var elttype = mtype.arguments.first
2937 return v.native_array_instance(elttype, l)
2938 else if ctype == "val*" then
2939 recv = v.init_instance(mtype)
2940 else if ctype == "char*" then
2941 recv = v.new_expr("NULL/*special!*/", mtype)
2943 recv = v.new_expr("({ctype})0/*special!*/", mtype)
2946 var callsite = self.callsite.as(not null)
2947 var args = v.varargize(callsite.mpropdef, recv, self.n_args.n_exprs)
2948 var res2 = v.compile_callsite(callsite, args)
2949 if res2 != null then
2950 #self.debug("got {res2} from {mproperty}. drop {recv}")
2957 redef class AAttrExpr
2960 var recv = v.expr(self.n_expr, null)
2961 var mproperty = self.mproperty.as(not null)
2962 return v.read_attribute(mproperty, recv)
2966 redef class AAttrAssignExpr
2969 var recv = v.expr(self.n_expr, null)
2970 var i = v.expr(self.n_value, null)
2971 var mproperty = self.mproperty.as(not null)
2972 v.write_attribute(mproperty, recv, i)
2977 redef class AAttrReassignExpr
2980 var recv = v.expr(self.n_expr, null)
2981 var value = v.expr(self.n_value, null)
2982 var mproperty = self.mproperty.as(not null)
2983 var attr = v.read_attribute(mproperty, recv)
2984 var res = v.compile_callsite(self.reassign_callsite.as(not null), [attr, value])
2986 v.write_attribute(mproperty, recv, res)
2990 redef class AIssetAttrExpr
2993 var recv = v.expr(self.n_expr, null)
2994 var mproperty = self.mproperty.as(not null)
2995 return v.isset_attribute(mproperty, recv)
2999 redef class ADebugTypeExpr
3008 redef class Array[E]
3009 # Return a new `Array` with the elements only contened in self and not in `o
`
3010 fun -(o: Array[E]): Array[E] do
3011 var res = new Array[E]
3012 for e in self do if not o.has(e) then res.add(e)
3018 # Return the name of the global C identifier associated to `self`.
3019 # This name is used to prefix files and other C identifiers associated with `self`.
3020 var c_name: String is lazy do
3023 if g != null and g.mproject.name != name then
3024 res = g.mproject.name.to_cmangle + "__" + name.to_cmangle
3026 res = name.to_cmangle
3031 # All `MProperty` associated to all `MClassDef` of `mclass
`
3032 fun properties(mclass: MClass): Set[MProperty] do
3033 if not self.properties_cache.has_key(mclass) then
3034 var properties = new HashSet[MProperty]
3035 var parents = new Array[MClass]
3036 if self.flatten_mclass_hierarchy.has(mclass) then
3037 parents.add_all(mclass.in_hierarchy(self).direct_greaters)
3039 for parent in parents do
3040 properties.add_all(self.properties(parent))
3042 for mclassdef in mclass.mclassdefs do
3043 if not self.in_importation <= mclassdef.mmodule then continue
3044 for mprop in mclassdef.intro_mproperties do
3045 properties.add(mprop)
3048 self.properties_cache[mclass] = properties
3050 return properties_cache[mclass]
3052 private var properties_cache: Map[MClass, Set[MProperty]] = new HashMap[MClass, Set[MProperty]]
3054 # Write FFI and nitni results to file
3055 fun finalize_ffi(c: AbstractCompiler) do end
3057 # Give requided addinional system libraries (as given to LD_LIBS)
3058 # Note: can return null instead of an empty set
3059 fun collect_linker_libs: nullable Set[String] do return null
3062 # Create a tool context to handle options and paths
3063 var toolcontext = new ToolContext
3065 toolcontext.tooldescription = "Usage: nitg [OPTION]... file.nit...\nCompiles Nit programs."
3067 # We do not add other options, so process them now!
3068 toolcontext.process_options(args)
3070 # We need a model to collect stufs
3071 var model = new Model
3072 # An a model builder to parse files
3073 var modelbuilder = new ModelBuilder(model, toolcontext)
3075 var arguments = toolcontext.option_context.rest
3076 if arguments.length > 1 and toolcontext.opt_output.value != null then
3077 print "Error: --output needs a single source file. Do you prefer --dir?"
3081 # Here we load an process all modules passed on the command line
3082 var mmodules = modelbuilder.parse(arguments)
3084 if mmodules.is_empty then return
3085 modelbuilder.run_phases
3087 for mmodule in mmodules do
3088 toolcontext.info("*** PROCESS {mmodule} ***", 1)
3090 toolcontext.run_global_phases(ms)