From ef7c2bda6b4c88f8007ed663b1108cd4651598c8 Mon Sep 17 00:00:00 2001 From: Hongxu Jia Date: Wed, 16 Mar 2016 02:27:43 -0400 Subject: [PATCH] gcc/libcpp: support -ffile-prefix-map== Similar -fdebug-prefix-map, add option -ffile-prefix-map to map one directory name (old) to another (new) in __FILE__, __BASE_FILE__ and __builtin_FILE (). https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70268 Upstream-Status: Submitted [gcc-patches@gcc.gnu.org] Signed-off-by: Hongxu Jia --- gcc/c-family/c-opts.c | 6 ++++ gcc/c-family/c.opt | 4 +++ gcc/dwarf2out.c | 1 + gcc/gimplify.c | 2 ++ libcpp/Makefile.in | 10 +++--- libcpp/file-map.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++ libcpp/include/file-map.h | 30 ++++++++++++++++ libcpp/macro.c | 2 ++ 8 files changed, 142 insertions(+), 5 deletions(-) create mode 100644 libcpp/file-map.c create mode 100644 libcpp/include/file-map.h diff --git a/gcc/c-family/c-opts.c b/gcc/c-family/c-opts.c index 718a052..3f93c56 100644 --- a/gcc/c-family/c-opts.c +++ b/gcc/c-family/c-opts.c @@ -46,6 +46,7 @@ along with GCC; see the file COPYING3. If not see #include "opts.h" #include "plugin.h" /* For PLUGIN_INCLUDE_FILE event. */ #include "mkdeps.h" +#include "file-map.h" #include "c-target.h" #include "tm.h" /* For BYTES_BIG_ENDIAN, DOLLARS_IN_IDENTIFIERS, @@ -510,6 +511,11 @@ c_common_handle_option (size_t scode, const char *arg, int value, cpp_opts->narrow_charset = arg; break; + case OPT_ffile_prefix_map_: + if (add_file_prefix_map (arg) < 0) + error ("invalid argument %qs to -ffile-prefix-map", arg); + break; + case OPT_fwide_exec_charset_: cpp_opts->wide_charset = arg; break; diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt index 453ec8e..30ad053 100644 --- a/gcc/c-family/c.opt +++ b/gcc/c-family/c.opt @@ -1117,6 +1117,10 @@ fexec-charset= C ObjC C++ ObjC++ Joined RejectNegative -fexec-charset= Convert all strings and character constants to character set +ffile-prefix-map= +C ObjC C++ ObjC++ Joined RejectNegative +-ffile-prefix-map= Map one directory name to another in __FILE__, __BASE_FILE__ and __builtin_FILE () + fextended-identifiers C ObjC C++ ObjC++ Permit universal character names (\\u and \\U) in identifiers diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index 526f114..438a475 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -19671,6 +19671,7 @@ gen_producer_string (void) case OPT_fltrans_output_list_: case OPT_fresolution_: case OPT_fdebug_prefix_map_: + case OPT_ffile_prefix_map_: /* Ignore these. */ continue; default: diff --git a/gcc/gimplify.c b/gcc/gimplify.c index c85f83a..1ffe1e1 100644 --- a/gcc/gimplify.c +++ b/gcc/gimplify.c @@ -87,6 +87,7 @@ along with GCC; see the file COPYING3. If not see #include "gimple-low.h" #include "cilk.h" #include "gomp-constants.h" +#include "file-map.h" #include "langhooks-def.h" /* FIXME: for lhd_set_decl_assembler_name */ #include "tree-pass.h" /* FIXME: only for PROP_gimple_any */ @@ -2370,6 +2371,7 @@ gimplify_call_expr (tree *expr_p, gimple_seq *pre_p, bool want_value) case BUILT_IN_FILE: { const char *locfile = LOCATION_FILE (EXPR_LOCATION (*expr_p)); + locfile = remap_file_filename (locfile); *expr_p = build_string_literal (strlen (locfile) + 1, locfile); return GS_OK; } diff --git a/libcpp/Makefile.in b/libcpp/Makefile.in index ad35563..c210ff9 100644 --- a/libcpp/Makefile.in +++ b/libcpp/Makefile.in @@ -84,12 +84,12 @@ DEPMODE = $(CXXDEPMODE) libcpp_a_OBJS = charset.o directives.o directives-only.o errors.o \ - expr.o files.o identifiers.o init.o lex.o line-map.o macro.o \ - mkdeps.o pch.o symtab.o traditional.o + expr.o file-map.o files.o identifiers.o init.o lex.o line-map.o \ + macro.o mkdeps.o pch.o symtab.o traditional.o libcpp_a_SOURCES = charset.c directives.c directives-only.c errors.c \ - expr.c files.c identifiers.c init.c lex.c line-map.c macro.c \ - mkdeps.c pch.c symtab.c traditional.c + expr.c file-map.c files.c identifiers.c init.c lex.c line-map.c \ + macro.c mkdeps.c pch.c symtab.c traditional.c all: libcpp.a $(USED_CATALOGS) @@ -263,7 +263,7 @@ po/$(PACKAGE).pot: $(libcpp_a_SOURCES) TAGS_SOURCES = $(libcpp_a_SOURCES) internal.h ucnid.h \ include/line-map.h include/symtab.h include/cpp-id-data.h \ - include/cpplib.h include/mkdeps.h system.h + include/cpplib.h include/mkdeps.h system.h include/file-map.h TAGS: $(TAGS_SOURCES) cd $(srcdir) && etags $(TAGS_SOURCES) diff --git a/libcpp/file-map.c b/libcpp/file-map.c new file mode 100644 index 0000000..04e851b --- /dev/null +++ b/libcpp/file-map.c @@ -0,0 +1,92 @@ +/* Map one directory name to another in __FILE__, __BASE_FILE__ + and __builtin_FILE (). + Copyright (C) 2001-2016 Free Software Foundation, Inc. + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 3, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; see the file COPYING3. If not see +. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! */ + +#include "config.h" +#include "system.h" +#include "file-map.h" + +/* Structure recording the mapping from source file and directory + names at compile time to __FILE__ */ +typedef struct file_prefix_map +{ + const char *old_prefix; + const char *new_prefix; + size_t old_len; + size_t new_len; + struct file_prefix_map *next; +} file_prefix_map; + +/* Linked list of such structures. */ +static file_prefix_map *file_prefix_maps; + +/* Record prefix mapping of __FILE__. ARG is the argument to + -ffile-prefix-map and must be of the form OLD=NEW. */ +int +add_file_prefix_map (const char *arg) +{ + file_prefix_map *map; + const char *p; + + p = strchr (arg, '='); + if (!p) + { + fprintf(stderr, "invalid argument %qs to -ffile-prefix-map", arg); + return -1; + } + map = XNEW (file_prefix_map); + map->old_prefix = xstrndup (arg, p - arg); + map->old_len = p - arg; + p++; + map->new_prefix = xstrdup (p); + map->new_len = strlen (p); + map->next = file_prefix_maps; + file_prefix_maps = map; + + return 0; +} + +/* Perform user-specified mapping of __FILE__ prefixes. Return + the new name corresponding to filename. */ + +const char * +remap_file_filename (const char *filename) +{ + file_prefix_map *map; + char *s; + const char *name; + size_t name_len; + + for (map = file_prefix_maps; map; map = map->next) + if (filename_ncmp (filename, map->old_prefix, map->old_len) == 0) + break; + if (!map) + return filename; + name = filename + map->old_len; + name_len = strlen (name) + 1; + s = (char *) alloca (name_len + map->new_len); + memcpy (s, map->new_prefix, map->new_len); + memcpy (s + map->new_len, name, name_len); + + return xstrdup (s); +} + + diff --git a/libcpp/include/file-map.h b/libcpp/include/file-map.h new file mode 100644 index 0000000..e6f8cbf --- /dev/null +++ b/libcpp/include/file-map.h @@ -0,0 +1,30 @@ +/* Map one directory name to another in __FILE__, __BASE_FILE__ + and __builtin_FILE (). + Copyright (C) 2001-2016 Free Software Foundation, Inc. + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 3, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; see the file COPYING3. If not see +. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! */ + +#ifndef LIBCPP_FILE_MAP_H +#define LIBCPP_FILE_MAP_H + +const char * remap_file_filename (const char *filename); + +int add_file_prefix_map (const char *arg); + +#endif /* !LIBCPP_FILE_MAP_H */ diff --git a/libcpp/macro.c b/libcpp/macro.c index 1e0a0b5..c3d330c 100644 --- a/libcpp/macro.c +++ b/libcpp/macro.c @@ -26,6 +26,7 @@ along with this program; see the file COPYING3. If not see #include "system.h" #include "cpplib.h" #include "internal.h" +#include "file-map.h" typedef struct macro_arg macro_arg; /* This structure represents the tokens of a macro argument. These @@ -297,6 +298,7 @@ _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node) if (!name) abort (); } + name = remap_file_filename (name); len = strlen (name); buf = _cpp_unaligned_alloc (pfile, len * 2 + 3); result = buf; -- 1.9.1