/* Collect static initialization info into data structures that can be
traversed by C++ initialization and finalization routines.
- Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1992-2013 Free Software Foundation, Inc.
Contributed by Chris Smith (csmith@convex.com).
Heavily modified by Michael Meissner (meissner@cygnus.com),
Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com).
GCC 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 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* Build tables of static constructors and destructors and run ld. */
#include "system.h"
#include "coretypes.h"
#include "tm.h"
-#include <signal.h>
-#if ! defined( SIGCHLD ) && defined( SIGCLD )
-# define SIGCHLD SIGCLD
-#endif
+#include "filenames.h"
+#include "file-find.h"
-#ifdef vfork /* Autoconf may define this to fork for us. */
-# define VFORK_STRING "fork"
-#else
-# define VFORK_STRING "vfork"
-#endif
-#ifdef HAVE_VFORK_H
-#include <vfork.h>
-#endif
-#ifdef VMS
-#define vfork() (decc$$alloc_vfork_blocks() >= 0 ? \
- lib$get_current_invo_context(decc$$get_vfork_jmpbuf()) : -1)
-#endif /* VMS */
+/* TARGET_64BIT may be defined to use driver specific functionality. */
+#undef TARGET_64BIT
+#define TARGET_64BIT TARGET_64BIT_DEFAULT
#ifndef LIBRARY_PATH_ENV
#define LIBRARY_PATH_ENV "LIBRARY_PATH"
#define COLLECT
#include "collect2.h"
+#include "collect2-aix.h"
+#include "diagnostic.h"
#include "demangle.h"
#include "obstack.h"
#include "intl.h"
the utilities are not correct for a cross-compiler; we have to hope that
cross-versions are in the proper directories. */
-#ifdef CROSS_COMPILE
-#undef SUNOS4_SHARED_LIBRARIES
+#ifdef CROSS_DIRECTORY_STRUCTURE
+#ifndef CROSS_AIX_SUPPORT
#undef OBJECT_FORMAT_COFF
+#endif
#undef MD_EXEC_PREFIX
#undef REAL_LD_FILE_NAME
#undef REAL_NM_FILE_NAME
#ifdef OBJECT_FORMAT_COFF
+#ifndef CROSS_DIRECTORY_STRUCTURE
#include <a.out.h>
#include <ar.h>
#endif
#include <ldfcn.h>
+#endif
/* Some systems have an ISCOFF macro, but others do not. In some cases
the macro may be wrong. MY_ISCOFF is defined in tm.h files for machines
fprintf ((STREAM), "void _GLOBAL__DD() {\n\t%s();\n}\n", (FUNC))
#endif
-#if defined (LDD_SUFFIX) || SUNOS4_SHARED_LIBRARIES
+#ifdef LDD_SUFFIX
#define SCAN_LIBRARIES
#endif
+#ifndef SHLIB_SUFFIX
+#define SHLIB_SUFFIX ".so"
+#endif
+
#ifdef USE_COLLECT2
int do_collecting = 1;
#else
int do_collecting = 0;
#endif
-#ifndef COLLECT_PARSE_FLAG
-#define COLLECT_PARSE_FLAG(FLAG)
+/* Cook up an always defined indication of whether we proceed the
+ "EXPORT_LIST" way. */
+
+#ifdef COLLECT_EXPORT_LIST
+#define DO_COLLECT_EXPORT_LIST 1
+#else
+#define DO_COLLECT_EXPORT_LIST 0
#endif
/* Nonzero if we should suppress the automatic demangling of identifiers
int number;
};
-/* Enumeration giving which pass this is for scanning the program file. */
-
-enum pass {
- PASS_FIRST, /* without constructors */
- PASS_OBJ, /* individual objects */
- PASS_LIB, /* looking for shared libraries */
- PASS_SECOND /* with constructors linked in */
-};
-
-int vflag; /* true if -v */
+bool vflag; /* true if -v or --version */
static int rflag; /* true if -r */
static int strip_flag; /* true if -s */
#ifdef COLLECT_EXPORT_LIST
static int export_flag; /* true if -bE */
static int aix64_flag; /* true if -b64 */
+static int aixrtl_flag; /* true if -brtl */
#endif
-int debug; /* true if -debug */
+enum lto_mode_d {
+ LTO_MODE_NONE, /* Not doing LTO. */
+ LTO_MODE_LTO, /* Normal LTO. */
+ LTO_MODE_WHOPR /* WHOPR. */
+};
+
+/* Current LTO mode. */
+static enum lto_mode_d lto_mode = LTO_MODE_NONE;
+
+bool debug; /* true if -debug */
+bool helpflag; /* true if --help */
-static int shared_obj; /* true if -shared */
+static int shared_obj; /* true if -shared */
static const char *c_file; /* <xxx>.c for constructor/destructor list. */
static const char *o_file; /* <xxx>.o for constructor/destructor list. */
#ifdef COLLECT_EXPORT_LIST
-static const char *export_file; /* <xxx>.x for AIX export list. */
+static const char *export_file; /* <xxx>.x for AIX export list. */
#endif
-const char *ldout; /* File for ld errors. */
+static char **lto_o_files; /* Output files for LTO. */
+const char *ldout; /* File for ld stdout. */
+const char *lderrout; /* File for ld stderr. */
static const char *output_file; /* Output file for ld. */
static const char *nm_file_name; /* pathname of nm */
#ifdef LDD_SUFFIX
static const char *ldd_file_name; /* pathname of ldd (or equivalent) */
#endif
static const char *strip_file_name; /* pathname of strip */
-const char *c_file_name; /* pathname of gcc */
+const char *c_file_name; /* pathname of gcc */
static char *initname, *fininame; /* names of init and fini funcs */
static struct head constructors; /* list of constructors found */
#endif
static struct head frame_tables; /* list of frame unwind info tables */
+static bool at_file_supplied; /* Whether to use @file arguments */
+static char *response_file; /* Name of any current response file */
+
struct obstack temporary_obstack;
char * temporary_firstobj;
-/* Holds the return value of pexecute and fork. */
-int pid;
-
-/* Structure to hold all the directories in which to search for files to
- execute. */
-
-struct prefix_list
-{
- const char *prefix; /* String to prepend to the path. */
- struct prefix_list *next; /* Next in linked list. */
-};
+/* A string that must be prepended to a target OS path in order to find
+ it on the host system. */
+#ifdef TARGET_SYSTEM_ROOT
+static const char *target_system_root = TARGET_SYSTEM_ROOT;
+#else
+static const char *target_system_root = "";
+#endif
-struct path_prefix
-{
- struct prefix_list *plist; /* List of prefixes to try */
- int max_len; /* Max length of a prefix in PLIST */
- const char *name; /* Name of this list (used in config stuff) */
-};
+/* Whether we may unlink the output file, which should be set as soon as we
+ know we have successfully produced it. This is typically useful to prevent
+ blindly attempting to unlink a read-only output that the target linker
+ would leave untouched. */
+bool may_unlink_output_file = false;
#ifdef COLLECT_EXPORT_LIST
/* Lists to keep libraries to be scanned for global constructors/destructors. */
static struct path_prefix libpath_lib_dirs; /* directories in LIBPATH */
static struct path_prefix *libpaths[3] = {&cmdline_lib_dirs,
&libpath_lib_dirs, NULL};
-static const char *const libexts[3] = {"a", "so", NULL}; /* possible library extensions */
#endif
+/* List of names of object files containing LTO information.
+ These are a subset of the object file names appearing on the
+ command line, and must be identical, in the sense of pointer
+ equality, with the names passed to maybe_run_lto_and_relink(). */
+
+struct lto_object
+{
+ const char *name; /* Name of object file. */
+ struct lto_object *next; /* Next in linked list. */
+};
+
+struct lto_object_list
+{
+ struct lto_object *first; /* First list element. */
+ struct lto_object *last; /* Last list element. */
+};
+
+static struct lto_object_list lto_objects;
+
+/* Special kinds of symbols that a name may denote. */
+
+typedef enum {
+ SYM_REGULAR = 0, /* nothing special */
+
+ SYM_CTOR = 1, /* constructor */
+ SYM_DTOR = 2, /* destructor */
+ SYM_INIT = 3, /* shared object routine that calls all the ctors */
+ SYM_FINI = 4, /* shared object routine that calls all the dtors */
+ SYM_DWEH = 5 /* DWARF exception handling table */
+} symkind;
+
+static symkind is_ctor_dtor (const char *);
+
static void handler (int);
-static int is_ctor_dtor (const char *);
-static char *find_a_file (struct path_prefix *, const char *);
-static void add_prefix (struct path_prefix *, const char *);
-static void prefix_from_env (const char *, struct path_prefix *);
-static void prefix_from_string (const char *, struct path_prefix *);
-static void do_wait (const char *);
+static void do_wait (const char *, struct pex_obj *);
static void fork_execute (const char *, char **);
static void maybe_unlink (const char *);
+static void maybe_unlink_list (char **);
static void add_to_list (struct head *, const char *);
static int extract_init_priority (const char *);
static void sort_ids (struct head *);
#ifndef LD_INIT_SWITCH
static void write_c_file_glob (FILE *, const char *);
#endif
-static void scan_prog_file (const char *, enum pass);
#ifdef SCAN_LIBRARIES
static void scan_libraries (const char *);
#endif
-#if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
-static int is_in_args (const char *, const char **, const char **);
-#endif
#ifdef COLLECT_EXPORT_LIST
#if 0
static int is_in_list (const char *, struct id *);
static char *resolve_lib_name (const char *);
#endif
static char *extract_string (const char **);
-\f
-#ifndef HAVE_DUP2
-static int
-dup2 (int oldfd, int newfd)
-{
- int fdtmp[256];
- int fdx = 0;
- int fd;
-
- if (oldfd == newfd)
- return oldfd;
- close (newfd);
- while ((fd = dup (oldfd)) != newfd && fd >= 0) /* good enough for low fd's */
- fdtmp[fdx++] = fd;
- while (fdx > 0)
- close (fdtmp[--fdx]);
-
- return fd;
-}
-#endif /* ! HAVE_DUP2 */
+static void post_ld_pass (bool);
+static void process_args (int *argcp, char **argv);
+
+/* Enumerations describing which pass this is for scanning the
+ program file ... */
+
+typedef enum {
+ PASS_FIRST, /* without constructors */
+ PASS_OBJ, /* individual objects */
+ PASS_LIB, /* looking for shared libraries */
+ PASS_SECOND, /* with constructors linked in */
+ PASS_LTOINFO /* looking for objects with LTO info */
+} scanpass;
+
+/* ... and which kinds of symbols are to be considered. */
+
+enum scanfilter_masks {
+ SCAN_NOTHING = 0,
+
+ SCAN_CTOR = 1 << SYM_CTOR,
+ SCAN_DTOR = 1 << SYM_DTOR,
+ SCAN_INIT = 1 << SYM_INIT,
+ SCAN_FINI = 1 << SYM_FINI,
+ SCAN_DWEH = 1 << SYM_DWEH,
+ SCAN_ALL = ~0
+};
+
+/* This type is used for parameters and variables which hold
+ combinations of the flags in enum scanfilter_masks. */
+typedef int scanfilter;
+
+/* Scan the name list of the loaded program for the symbols g++ uses for
+ static constructors and destructors.
+
+ The SCANPASS argument tells which collect processing pass this is for and
+ the SCANFILTER argument tells which kinds of symbols to consider in this
+ pass. Symbols of a special kind not in the filter mask are considered as
+ regular ones.
+
+ The constructor table begins at __CTOR_LIST__ and contains a count of the
+ number of pointers (or -1 if the constructors are built in a separate
+ section by the linker), followed by the pointers to the constructor
+ functions, terminated with a null pointer. The destructor table has the
+ same format, and begins at __DTOR_LIST__. */
+
+static void scan_prog_file (const char *, scanpass, scanfilter);
+
\f
/* Delete tempfiles and exit function. */
maybe_unlink (export_file);
#endif
+ if (lto_o_files)
+ maybe_unlink_list (lto_o_files);
+
if (ldout != 0 && ldout[0])
{
- dump_file (ldout);
+ dump_ld_file (ldout, stdout);
maybe_unlink (ldout);
}
+ if (lderrout != 0 && lderrout[0])
+ {
+ dump_ld_file (lderrout, stderr);
+ maybe_unlink (lderrout);
+ }
+
if (status != 0 && output_file != 0 && output_file[0])
maybe_unlink (output_file);
+ if (response_file)
+ maybe_unlink (response_file);
+
exit (status);
}
\f
/* Notify user of a non-error. */
void
-notice (const char *msgid, ...)
-{
- va_list ap;
-
- va_start (ap, msgid);
- vfprintf (stderr, _(msgid), ap);
- va_end (ap);
-}
-
-/* Die when sys call fails. */
-
-void
-fatal_perror (const char * msgid, ...)
+notice (const char *cmsgid, ...)
{
- int e = errno;
va_list ap;
- va_start (ap, msgid);
- fprintf (stderr, "collect2: ");
- vfprintf (stderr, _(msgid), ap);
- fprintf (stderr, ": %s\n", xstrerror (e));
+ va_start (ap, cmsgid);
+ vfprintf (stderr, _(cmsgid), ap);
va_end (ap);
-
- collect_exit (FATAL_EXIT_CODE);
}
-/* Just die. */
-
+/* Notify user of a non-error, without translating the format string. */
void
-fatal (const char * msgid, ...)
+notice_translated (const char *cmsgid, ...)
{
va_list ap;
- va_start (ap, msgid);
- fprintf (stderr, "collect2: ");
- vfprintf (stderr, _(msgid), ap);
- fprintf (stderr, "\n");
+ va_start (ap, cmsgid);
+ vfprintf (stderr, cmsgid, ap);
va_end (ap);
-
- collect_exit (FATAL_EXIT_CODE);
-}
-
-/* Write error message. */
-
-void
-error (const char * msgid, ...)
-{
- va_list ap;
-
- va_start (ap, msgid);
- fprintf (stderr, "collect2: ");
- vfprintf (stderr, _(msgid), ap);
- fprintf (stderr, "\n");
- va_end(ap);
-}
-
-/* In case obstack is linked in, and abort is defined to fancy_abort,
- provide a default entry. */
-
-void
-fancy_abort (void)
-{
- fatal ("internal error");
}
\f
static void
if (ldout != 0 && ldout[0])
maybe_unlink (ldout);
+ if (lderrout != 0 && lderrout[0])
+ maybe_unlink (lderrout);
+
#ifdef COLLECT_EXPORT_LIST
if (export_file != 0 && export_file[0])
maybe_unlink (export_file);
#endif
+ if (lto_o_files)
+ maybe_unlink_list (lto_o_files);
+
+ if (response_file)
+ maybe_unlink (response_file);
+
signal (signo, SIG_DFL);
- kill (getpid (), signo);
+ raise (signo);
}
\f
obstack_1grow (&temporary_obstack, '\0');
*pp = p;
- return obstack_finish (&temporary_obstack);
+ return XOBFINISH (&temporary_obstack, char *);
}
\f
void
-dump_file (const char *name)
+dump_ld_file (const char *name, FILE *to)
{
FILE *stream = fopen (name, "r");
const char *word, *p;
char *result;
obstack_1grow (&temporary_obstack, '\0');
- word = obstack_finish (&temporary_obstack);
+ word = XOBFINISH (&temporary_obstack, const char *);
if (*word == '.')
- ++word, putc ('.', stderr);
+ ++word, putc ('.', to);
p = word;
if (!strncmp (p, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)))
p += strlen (USER_LABEL_PREFIX);
+#ifdef HAVE_LD_DEMANGLE
+ result = 0;
+#else
if (no_demangle)
result = 0;
else
result = cplus_demangle (p, DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE);
+#endif
if (result)
{
int diff;
- fputs (result, stderr);
+ fputs (result, to);
diff = strlen (word) - strlen (result);
while (diff > 0 && c == ' ')
- --diff, putc (' ', stderr);
- while (diff < 0 && c == ' ')
- ++diff, c = getc (stream);
+ --diff, putc (' ', to);
+ if (diff < 0 && c == ' ')
+ {
+ while (diff < 0 && c == ' ')
+ ++diff, c = getc (stream);
+ if (!ISSPACE (c))
+ {
+ /* Make sure we output at least one space, or
+ the demangled symbol name will run into
+ whatever text follows. */
+ putc (' ', to);
+ }
+ }
free (result);
}
else
- fputs (word, stderr);
+ fputs (word, to);
- fflush (stderr);
+ fflush (to);
obstack_free (&temporary_obstack, temporary_firstobj);
}
if (c == EOF)
break;
- putc (c, stderr);
+ putc (c, to);
}
fclose (stream);
}
\f
-/* Decide whether the given symbol is: a constructor (1), a destructor
- (2), a routine in a shared object that calls all the constructors
- (3) or destructors (4), a DWARF exception-handling table (5), or
- nothing special (0). */
+/* Return the kind of symbol denoted by name S. */
-static int
+static symkind
is_ctor_dtor (const char *s)
{
- struct names { const char *const name; const int len; const int ret;
+ struct names { const char *const name; const int len; symkind ret;
const int two_underscores; };
const struct names *p;
static const struct names special[] = {
#ifndef NO_DOLLAR_IN_LABEL
- { "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, 1, 0 },
- { "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, 2, 0 },
+ { "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, SYM_CTOR, 0 },
+ { "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, SYM_DTOR, 0 },
#else
#ifndef NO_DOT_IN_LABEL
- { "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, 1, 0 },
- { "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, 2, 0 },
+ { "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, SYM_CTOR, 0 },
+ { "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, SYM_DTOR, 0 },
#endif /* NO_DOT_IN_LABEL */
#endif /* NO_DOLLAR_IN_LABEL */
- { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, 1, 0 },
- { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, 2, 0 },
- { "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, 5, 0 },
- { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, 3, 0 },
- { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, 4, 0 },
- { NULL, 0, 0, 0 }
+ { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, SYM_CTOR, 0 },
+ { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, SYM_DTOR, 0 },
+ { "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, SYM_DWEH, 0 },
+ { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, SYM_INIT, 0 },
+ { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, SYM_FINI, 0 },
+ { NULL, 0, SYM_REGULAR, 0 }
};
while ((ch = *s) == '_')
++s;
if (s == orig_s)
- return 0;
+ return SYM_REGULAR;
for (p = &special[0]; p->len > 0; p++)
{
return p->ret;
}
}
- return 0;
+ return SYM_REGULAR;
}
\f
/* We maintain two prefix lists: one from COMPILER_PATH environment variable
static struct path_prefix cpath, path;
-#ifdef CROSS_COMPILE
+#ifdef CROSS_DIRECTORY_STRUCTURE
/* This is the name of the target machine. We use it to form the name
of the files to execute. */
Return 0 if not found, otherwise return its name, allocated with malloc. */
-static char *
-find_a_file (struct path_prefix *pprefix, const char *name)
-{
- char *temp;
- struct prefix_list *pl;
- int len = pprefix->max_len + strlen (name) + 1;
-
- if (debug)
- fprintf (stderr, "Looking for '%s'\n", name);
-
-#ifdef HOST_EXECUTABLE_SUFFIX
- len += strlen (HOST_EXECUTABLE_SUFFIX);
-#endif
-
- temp = xmalloc (len);
+#ifdef OBJECT_FORMAT_NONE
- /* Determine the filename to execute (special case for absolute paths). */
+/* Add an entry for the object file NAME to object file list LIST.
+ New entries are added at the end of the list. The original pointer
+ value of NAME is preserved, i.e., no string copy is performed. */
- if (*name == '/'
-#ifdef HAVE_DOS_BASED_FILE_SYSTEM
- || (*name && name[1] == ':')
-#endif
- )
- {
- if (access (name, X_OK) == 0)
- {
- strcpy (temp, name);
+static void
+add_lto_object (struct lto_object_list *list, const char *name)
+{
+ struct lto_object *n = XNEW (struct lto_object);
+ n->name = name;
+ n->next = NULL;
- if (debug)
- fprintf (stderr, " - found: absolute path\n");
+ if (list->last)
+ list->last->next = n;
+ else
+ list->first = n;
- return temp;
- }
+ list->last = n;
+}
+#endif /* OBJECT_FORMAT_NONE */
-#ifdef HOST_EXECUTABLE_SUFFIX
- /* Some systems have a suffix for executable files.
- So try appending that. */
- strcpy (temp, name);
- strcat (temp, HOST_EXECUTABLE_SUFFIX);
- if (access (temp, X_OK) == 0)
- return temp;
-#endif
+/* Perform a link-time recompilation and relink if any of the object
+ files contain LTO info. The linker command line LTO_LD_ARGV
+ represents the linker command that would produce a final executable
+ without the use of LTO. OBJECT_LST is a vector of object file names
+ appearing in LTO_LD_ARGV that are to be considered for link-time
+ recompilation, where OBJECT is a pointer to the last valid element.
+ (This awkward convention avoids an impedance mismatch with the
+ usage of similarly-named variables in main().) The elements of
+ OBJECT_LST must be identical, i.e., pointer equal, to the
+ corresponding arguments in LTO_LD_ARGV.
+
+ Upon entry, at least one linker run has been performed without the
+ use of any LTO info that might be present. Any recompilations
+ necessary for template instantiations have been performed, and
+ initializer/finalizer tables have been created if needed and
+ included in the linker command line LTO_LD_ARGV. If any of the
+ object files contain LTO info, we run the LTO back end on all such
+ files, and perform the final link with the LTO back end output
+ substituted for the LTO-optimized files. In some cases, a final
+ link with all link-time generated code has already been performed,
+ so there is no need to relink if no LTO info is found. In other
+ cases, our caller has not produced the final executable, and is
+ relying on us to perform the required link whether LTO info is
+ present or not. In that case, the FORCE argument should be true.
+ Note that the linker command line argument LTO_LD_ARGV passed into
+ this function may be modified in place. */
- if (debug)
- fprintf (stderr, " - failed to locate using absolute path\n");
- }
- else
- for (pl = pprefix->plist; pl; pl = pl->next)
- {
- struct stat st;
+static void
+maybe_run_lto_and_relink (char **lto_ld_argv, char **object_lst,
+ const char **object, bool force)
+{
+ const char **object_file = CONST_CAST2 (const char **, char **, object_lst);
- strcpy (temp, pl->prefix);
- strcat (temp, name);
+ int num_lto_c_args = 1; /* Allow space for the terminating NULL. */
- if (stat (temp, &st) >= 0
- && ! S_ISDIR (st.st_mode)
- && access (temp, X_OK) == 0)
- return temp;
+ while (object_file < object)
+ {
+ /* If file contains LTO info, add it to the list of LTO objects. */
+ scan_prog_file (*object_file++, PASS_LTOINFO, SCAN_ALL);
-#ifdef HOST_EXECUTABLE_SUFFIX
- /* Some systems have a suffix for executable files.
- So try appending that. */
- strcat (temp, HOST_EXECUTABLE_SUFFIX);
+ /* Increment the argument count by the number of object file arguments
+ we will add. An upper bound suffices, so just count all of the
+ object files regardless of whether they contain LTO info. */
+ num_lto_c_args++;
+ }
- if (stat (temp, &st) >= 0
- && ! S_ISDIR (st.st_mode)
- && access (temp, X_OK) == 0)
- return temp;
-#endif
- }
+ if (lto_objects.first)
+ {
+ char **lto_c_argv;
+ const char **lto_c_ptr;
+ char **p;
+ char **lto_o_ptr;
+ struct lto_object *list;
+ char *lto_wrapper = getenv ("COLLECT_LTO_WRAPPER");
+ struct pex_obj *pex;
+ const char *prog = "lto-wrapper";
+ int lto_ld_argv_size = 0;
+ char **out_lto_ld_argv;
+ int out_lto_ld_argv_size;
+ size_t num_files;
- if (debug && pprefix->plist == NULL)
- fprintf (stderr, " - failed: no entries in prefix list\n");
+ if (!lto_wrapper)
+ fatal_error ("COLLECT_LTO_WRAPPER must be set");
- free (temp);
- return 0;
-}
+ num_lto_c_args++;
-/* Add an entry for PREFIX to prefix list PPREFIX. */
+ /* There is at least one object file containing LTO info,
+ so we need to run the LTO back end and relink.
-static void
-add_prefix (struct path_prefix *pprefix, const char *prefix)
-{
- struct prefix_list *pl, **prev;
- int len;
+ To do so we build updated ld arguments with first
+ LTO object replaced by all partitions and other LTO
+ objects removed. */
- if (pprefix->plist)
- {
- for (pl = pprefix->plist; pl->next; pl = pl->next)
- ;
- prev = &pl->next;
- }
- else
- prev = &pprefix->plist;
+ lto_c_argv = (char **) xcalloc (sizeof (char *), num_lto_c_args);
+ lto_c_ptr = CONST_CAST2 (const char **, char **, lto_c_argv);
- /* Keep track of the longest prefix. */
+ *lto_c_ptr++ = lto_wrapper;
- len = strlen (prefix);
- if (len > pprefix->max_len)
- pprefix->max_len = len;
+ /* Add LTO objects to the wrapper command line. */
+ for (list = lto_objects.first; list; list = list->next)
+ *lto_c_ptr++ = list->name;
- pl = xmalloc (sizeof (struct prefix_list));
- pl->prefix = xstrdup (prefix);
+ *lto_c_ptr = NULL;
- if (*prev)
- pl->next = *prev;
- else
- pl->next = (struct prefix_list *) 0;
- *prev = pl;
-}
-\f
-/* Take the value of the environment variable ENV, break it into a path, and
- add of the entries to PPREFIX. */
+ /* Run the LTO back end. */
+ pex = collect_execute (prog, lto_c_argv, NULL, NULL, PEX_SEARCH);
+ {
+ int c;
+ FILE *stream;
+ size_t i;
+ char *start, *end;
-static void
-prefix_from_env (const char *env, struct path_prefix *pprefix)
-{
- const char *p;
- GET_ENVIRONMENT (p, env);
+ stream = pex_read_output (pex, 0);
+ gcc_assert (stream);
- if (p)
- prefix_from_string (p, pprefix);
-}
+ num_files = 0;
+ while ((c = getc (stream)) != EOF)
+ {
+ obstack_1grow (&temporary_obstack, c);
+ if (c == '\n')
+ ++num_files;
+ }
-static void
-prefix_from_string (const char *p, struct path_prefix *pprefix)
-{
- const char *startp, *endp;
- char *nstore = xmalloc (strlen (p) + 3);
+ lto_o_files = XNEWVEC (char *, num_files + 1);
+ lto_o_files[num_files] = NULL;
+ start = XOBFINISH (&temporary_obstack, char *);
+ for (i = 0; i < num_files; ++i)
+ {
+ end = start;
+ while (*end != '\n')
+ ++end;
+ *end = '\0';
- if (debug)
- fprintf (stderr, "Convert string '%s' into prefixes, separator = '%c'\n", p, PATH_SEPARATOR);
+ lto_o_files[i] = xstrdup (start);
- startp = endp = p;
- while (1)
- {
- if (*endp == PATH_SEPARATOR || *endp == 0)
- {
- strncpy (nstore, startp, endp-startp);
- if (endp == startp)
- {
- strcpy (nstore, "./");
- }
- else if (! IS_DIR_SEPARATOR (endp[-1]))
- {
- nstore[endp-startp] = DIR_SEPARATOR;
- nstore[endp-startp+1] = 0;
- }
- else
- nstore[endp-startp] = 0;
+ start = end + 1;
+ }
- if (debug)
- fprintf (stderr, " - add prefix: %s\n", nstore);
+ obstack_free (&temporary_obstack, temporary_firstobj);
+ }
+ do_wait (prog, pex);
+ pex = NULL;
- add_prefix (pprefix, nstore);
- if (*endp == 0)
+ /* Compute memory needed for new LD arguments. At most number of original arguemtns
+ plus number of partitions. */
+ for (lto_ld_argv_size = 0; lto_ld_argv[lto_ld_argv_size]; lto_ld_argv_size++)
+ ;
+ out_lto_ld_argv = XCNEWVEC(char *, num_files + lto_ld_argv_size + 1);
+ out_lto_ld_argv_size = 0;
+
+ /* After running the LTO back end, we will relink, substituting
+ the LTO output for the object files that we submitted to the
+ LTO. Here, we modify the linker command line for the relink. */
+
+ /* Copy all arguments until we find first LTO file. */
+ p = lto_ld_argv;
+ while (*p != NULL)
+ {
+ for (list = lto_objects.first; list; list = list->next)
+ if (*p == list->name) /* Note test for pointer equality! */
+ break;
+ if (list)
break;
- endp = startp = endp + 1;
- }
- else
- endp++;
+ out_lto_ld_argv[out_lto_ld_argv_size++] = *p++;
+ }
+
+ /* Now insert all LTO partitions. */
+ lto_o_ptr = lto_o_files;
+ while (*lto_o_ptr)
+ out_lto_ld_argv[out_lto_ld_argv_size++] = *lto_o_ptr++;
+
+ /* ... and copy the rest. */
+ while (*p != NULL)
+ {
+ for (list = lto_objects.first; list; list = list->next)
+ if (*p == list->name) /* Note test for pointer equality! */
+ break;
+ if (!list)
+ out_lto_ld_argv[out_lto_ld_argv_size++] = *p;
+ p++;
+ }
+ out_lto_ld_argv[out_lto_ld_argv_size++] = 0;
+
+ /* Run the linker again, this time replacing the object files
+ optimized by the LTO with the temporary file generated by the LTO. */
+ fork_execute ("ld", out_lto_ld_argv);
+ post_ld_pass (true);
+ free (lto_ld_argv);
+
+ maybe_unlink_list (lto_o_files);
+ }
+ else if (force)
+ {
+ /* Our caller is relying on us to do the link
+ even though there is no LTO back end work to be done. */
+ fork_execute ("ld", lto_ld_argv);
+ post_ld_pass (false);
}
}
\f
int
main (int argc, char **argv)
{
- static const char *const ld_suffix = "ld";
+ enum linker_select
+ {
+ USE_DEFAULT_LD,
+ USE_PLUGIN_LD,
+ USE_GOLD_LD,
+ USE_BFD_LD,
+ USE_LD_MAX
+ } selected_linker = USE_DEFAULT_LD;
+ static const char *const ld_suffixes[USE_LD_MAX] =
+ {
+ "ld",
+ PLUGIN_LD_SUFFIX,
+ "ld.gold",
+ "ld.bfd"
+ };
static const char *const real_ld_suffix = "real-ld";
static const char *const collect_ld_suffix = "collect-ld";
static const char *const nm_suffix = "nm";
static const char *const strip_suffix = "strip";
static const char *const gstrip_suffix = "gstrip";
-#ifdef CROSS_COMPILE
+ const char *full_ld_suffixes[USE_LD_MAX];
+#ifdef CROSS_DIRECTORY_STRUCTURE
/* If we look for a program in the compiler directories, we just use
the short name, since these directories are already system-specific.
But it we look for a program in the system directories, we need to
qualify the program name with the target machine. */
- const char *const full_ld_suffix =
- concat(target_machine, "-", ld_suffix, NULL);
const char *const full_nm_suffix =
concat (target_machine, "-", nm_suffix, NULL);
const char *const full_gnm_suffix =
const char *const full_gstrip_suffix =
concat (target_machine, "-", gstrip_suffix, NULL);
#else
- const char *const full_ld_suffix = ld_suffix;
- const char *const full_nm_suffix = nm_suffix;
- const char *const full_gnm_suffix = gnm_suffix;
#ifdef LDD_SUFFIX
const char *const full_ldd_suffix = ldd_suffix;
#endif
+ const char *const full_nm_suffix = nm_suffix;
+ const char *const full_gnm_suffix = gnm_suffix;
const char *const full_strip_suffix = strip_suffix;
const char *const full_gstrip_suffix = gstrip_suffix;
-#endif /* CROSS_COMPILE */
+#endif /* CROSS_DIRECTORY_STRUCTURE */
const char *arg;
FILE *outf;
const char **c_ptr;
char **ld1_argv;
const char **ld1;
+ bool use_plugin = false;
+ bool use_collect_ld = false;
+
+ /* The kinds of symbols we will have to consider when scanning the
+ outcome of a first pass link. This is ALL to start with, then might
+ be adjusted before getting to the first pass link per se, typically on
+ AIX where we perform an early scan of objects and libraries to fetch
+ the list of global ctors/dtors and make sure they are not garbage
+ collected. */
+ scanfilter ld1_filter = SCAN_ALL;
+
char **ld2_argv;
const char **ld2;
char **object_lst;
const char **object;
+#ifdef TARGET_AIX_VERSION
+ int object_nbr = argc;
+#endif
int first_file;
- int num_c_args = argc+9;
+ int num_c_args;
+ char **old_argv;
+ int i;
+
+ for (i = 0; i < USE_LD_MAX; i++)
+ full_ld_suffixes[i]
+#ifdef CROSS_DIRECTORY_STRUCTURE
+ = concat (target_machine, "-", ld_suffixes[i], NULL);
+#else
+ = ld_suffixes[i];
+#endif
+
+ p = argv[0] + strlen (argv[0]);
+ while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
+ --p;
+ progname = p;
+
+ xmalloc_set_program_name (progname);
+ old_argv = argv;
+ expandargv (&argc, &argv);
+ if (argv != old_argv)
+ at_file_supplied = 1;
+
+ process_args (&argc, argv);
+
+ num_c_args = argc + 9;
+
+#ifndef HAVE_LD_DEMANGLE
no_demangle = !! getenv ("COLLECT_NO_DEMANGLE");
/* Suppress demangling by the real linker, which may be broken. */
- putenv (xstrdup ("COLLECT_NO_DEMANGLE="));
+ putenv (xstrdup ("COLLECT_NO_DEMANGLE=1"));
+#endif
#if defined (COLLECT2_HOST_INITIALIZATION)
/* Perform system dependent initialization, if necessary. */
signal (SIGCHLD, SIG_DFL);
#endif
+ /* Unlock the stdio streams. */
+ unlock_std_streams ();
+
gcc_init_libintl ();
+ diagnostic_initialize (global_dc, 0);
+
/* Do not invoke xcalloc before this point, since locale needs to be
set first, in case a diagnostic is issued. */
- ld1 = (const char **)(ld1_argv = xcalloc(sizeof (char *), argc+3));
- ld2 = (const char **)(ld2_argv = xcalloc(sizeof (char *), argc+10));
- object = (const char **)(object_lst = xcalloc(sizeof (char *), argc));
+ ld1_argv = XCNEWVEC (char *, argc + 4);
+ ld1 = CONST_CAST2 (const char **, char **, ld1_argv);
+ ld2_argv = XCNEWVEC (char *, argc + 11);
+ ld2 = CONST_CAST2 (const char **, char **, ld2_argv);
+ object_lst = XCNEWVEC (char *, argc);
+ object = CONST_CAST2 (const char **, char **, object_lst);
#ifdef DEBUG
debug = 1;
/* Parse command line early for instances of -debug. This allows
the debug flag to be set before functions like find_a_file()
- are called. */
+ are called. We also look for the -flto or -flto-partition=none flag to know
+ what LTO mode we are in. */
{
- int i;
+ bool no_partition = false;
for (i = 1; argv[i] != NULL; i ++)
{
if (! strcmp (argv[i], "-debug"))
- debug = 1;
- COLLECT_PARSE_FLAG (argv[i]);
+ debug = true;
+ else if (! strcmp (argv[i], "-flto-partition=none"))
+ no_partition = true;
+ else if ((! strncmp (argv[i], "-flto=", 6)
+ || ! strcmp (argv[i], "-flto")) && ! use_plugin)
+ lto_mode = LTO_MODE_WHOPR;
+ else if (!strncmp (argv[i], "-fno-lto", 8))
+ lto_mode = LTO_MODE_NONE;
+ else if (! strcmp (argv[i], "-plugin"))
+ {
+ use_plugin = true;
+ lto_mode = LTO_MODE_NONE;
+ if (selected_linker == USE_DEFAULT_LD)
+ selected_linker = USE_PLUGIN_LD;
+ }
+ else if (strcmp (argv[i], "-fuse-ld=bfd") == 0)
+ selected_linker = USE_BFD_LD;
+ else if (strcmp (argv[i], "-fuse-ld=gold") == 0)
+ selected_linker = USE_GOLD_LD;
+
+#ifdef COLLECT_EXPORT_LIST
+ /* These flags are position independent, although their order
+ is important - subsequent flags override earlier ones. */
+ else if (strcmp (argv[i], "-b64") == 0)
+ aix64_flag = 1;
+ /* -bexport:filename always needs the :filename */
+ else if (strncmp (argv[i], "-bE:", 4) == 0
+ || strncmp (argv[i], "-bexport:", 9) == 0)
+ export_flag = 1;
+ else if (strcmp (argv[i], "-brtl") == 0
+ || strcmp (argv[i], "-bsvr4") == 0
+ || strcmp (argv[i], "-G") == 0)
+ aixrtl_flag = 1;
+ else if (strcmp (argv[i], "-bnortl") == 0)
+ aixrtl_flag = 0;
+#endif
}
vflag = debug;
+ find_file_set_debug (debug);
+ if (no_partition && lto_mode == LTO_MODE_WHOPR)
+ lto_mode = LTO_MODE_LTO;
}
#ifndef DEFAULT_A_OUT_NAME
#endif
obstack_begin (&temporary_obstack, 0);
- temporary_firstobj = obstack_alloc (&temporary_obstack, 0);
+ temporary_firstobj = (char *) obstack_alloc (&temporary_obstack, 0);
+#ifndef HAVE_LD_DEMANGLE
current_demangling_style = auto_demangling;
+#endif
p = getenv ("COLLECT_GCC_OPTIONS");
while (p && *p)
{
obstack_free (&temporary_obstack, temporary_firstobj);
/* -fno-profile-arcs -fno-test-coverage -fno-branch-probabilities
- -fno-exceptions -w */
- num_c_args += 5;
+ -fno-exceptions -w -fno-whole-program */
+ num_c_args += 6;
- c_ptr = (const char **) (c_argv = xcalloc (sizeof (char *), num_c_args));
+ c_argv = XCNEWVEC (char *, num_c_args);
+ c_ptr = CONST_CAST2 (const char **, char **, c_argv);
if (argc < 2)
- fatal ("no arguments");
+ fatal_error ("no arguments");
#ifdef SIGQUIT
if (signal (SIGQUIT, SIG_IGN) != SIG_IGN)
ld_file_name = find_a_file (&cpath, real_ld_suffix);
/* Likewise for `collect-ld'. */
if (ld_file_name == 0)
- ld_file_name = find_a_file (&cpath, collect_ld_suffix);
+ {
+ ld_file_name = find_a_file (&cpath, collect_ld_suffix);
+ use_collect_ld = ld_file_name != 0;
+ }
/* Search the compiler directories for `ld'. We have protection against
recursive calls in find_a_file. */
if (ld_file_name == 0)
- ld_file_name = find_a_file (&cpath, ld_suffix);
+ ld_file_name = find_a_file (&cpath, ld_suffixes[selected_linker]);
/* Search the ordinary system bin directories
for `ld' (if native linking) or `TARGET-ld' (if cross). */
if (ld_file_name == 0)
- ld_file_name = find_a_file (&path, full_ld_suffix);
+ ld_file_name = find_a_file (&path, full_ld_suffixes[selected_linker]);
#ifdef REAL_NM_FILE_NAME
nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME);
c_file_name = getenv ("COLLECT_GCC");
if (c_file_name == 0)
{
-#ifdef CROSS_COMPILE
+#ifdef CROSS_DIRECTORY_STRUCTURE
c_file_name = concat (target_machine, "-gcc", NULL);
#else
c_file_name = "gcc";
export_file = make_temp_file (".x");
#endif
ldout = make_temp_file (".ld");
+ lderrout = make_temp_file (".le");
*c_ptr++ = c_file_name;
*c_ptr++ = "-x";
*c_ptr++ = "c";
*c_ptr++ = "-fno-branch-probabilities";
*c_ptr++ = "-fno-exceptions";
*c_ptr++ = "-w";
+ *c_ptr++ = "-fno-whole-program";
/* !!! When GCC calls collect2,
it does not know whether it is calling collect2 or ld.
{
switch (arg[1])
{
-#ifdef COLLECT_EXPORT_LIST
- /* We want to disable automatic exports on AIX when user
- explicitly puts an export list in command line */
- case 'b':
- if (arg[2] == 'E' || strncmp (&arg[2], "export", 6) == 0)
- export_flag = 1;
- else if (arg[2] == '6' && arg[3] == '4')
- aix64_flag = 1;
- break;
-#endif
-
case 'd':
if (!strcmp (arg, "-debug"))
{
ld1--;
ld2--;
}
+ if (!strcmp (arg, "-dynamic-linker") && argv[1])
+ {
+ ++argv;
+ *ld1++ = *ld2++ = *argv;
+ }
break;
+ case 'f':
+ if (strncmp (arg, "-flto", 5) == 0)
+ {
+#ifdef ENABLE_LTO
+ /* Do not pass LTO flag to the linker. */
+ ld1--;
+ ld2--;
+#else
+ error ("LTO support has not been enabled in this "
+ "configuration");
+#endif
+ }
+ else if (!use_collect_ld
+ && strncmp (arg, "-fuse-ld=", 9) == 0)
+ {
+ /* Do not pass -fuse-ld={bfd|gold} to the linker. */
+ ld1--;
+ ld2--;
+ }
+#ifdef TARGET_AIX_VERSION
+ else
+ {
+ /* File containing a list of input files to process. */
+
+ FILE *stream;
+ char buf[MAXPATHLEN + 2];
+ /* Number of additionnal object files. */
+ int add_nbr = 0;
+ /* Maximum of additionnal object files before vector
+ expansion. */
+ int add_max = 0;
+ const char *list_filename = arg + 2;
+
+ /* Accept -fFILENAME and -f FILENAME. */
+ if (*list_filename == '\0' && argv[1])
+ {
+ ++argv;
+ list_filename = *argv;
+ *ld1++ = *ld2++ = *argv;
+ }
+
+ stream = fopen (list_filename, "r");
+ if (stream == NULL)
+ fatal_error ("can't open %s: %m", list_filename);
+
+ while (fgets (buf, sizeof buf, stream) != NULL)
+ {
+ /* Remove end of line. */
+ int len = strlen (buf);
+ if (len >= 1 && buf[len - 1] =='\n')
+ buf[len - 1] = '\0';
+
+ /* Put on object vector.
+ Note: we only expanse vector here, so we must keep
+ extra space for remaining arguments. */
+ if (add_nbr >= add_max)
+ {
+ int pos =
+ object - CONST_CAST2 (const char **, char **,
+ object_lst);
+ add_max = (add_max == 0) ? 16 : add_max * 2;
+ object_lst = XRESIZEVEC (char *, object_lst,
+ object_nbr + add_max);
+ object = CONST_CAST2 (const char **, char **,
+ object_lst) + pos;
+ object_nbr += add_max;
+ }
+ *object++ = xstrdup (buf);
+ add_nbr++;
+ }
+ fclose (stream);
+ }
+#endif
+ break;
+
case 'l':
if (first_file)
{
}
#ifdef COLLECT_EXPORT_LIST
{
- /* Resolving full library name. */
+ /* Resolving full library name. */
const char *s = resolve_lib_name (arg+2);
/* Saving a full library name. */
case 'L':
add_prefix (&cmdline_lib_dirs, arg+2);
break;
-#else
-#if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
- case 'L':
- if (is_in_args (arg, (const char **) ld1_argv, ld1-1))
- --ld1;
- break;
-#endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
#endif
case 'o':
if (arg[2] == '\0')
output_file = *ld1++ = *ld2++ = *++argv;
- else if (1
-#ifdef SWITCHES_NEED_SPACES
- && ! strchr (SWITCHES_NEED_SPACES, arg[1])
-#endif
- )
-
+ else
output_file = &arg[2];
break;
case 'v':
if (arg[2] == '\0')
- vflag = 1;
+ vflag = true;
+ break;
+
+ case '-':
+ if (strcmp (arg, "--no-demangle") == 0)
+ {
+#ifndef HAVE_LD_DEMANGLE
+ no_demangle = 1;
+ ld1--;
+ ld2--;
+#endif
+ }
+ else if (strncmp (arg, "--demangle", 10) == 0)
+ {
+#ifndef HAVE_LD_DEMANGLE
+ no_demangle = 0;
+ if (arg[10] == '=')
+ {
+ enum demangling_styles style
+ = cplus_demangle_name_to_style (arg+11);
+ if (style == unknown_demangling)
+ error ("unknown demangling style '%s'", arg+11);
+ else
+ current_demangling_style = style;
+ }
+ ld1--;
+ ld2--;
+#endif
+ }
+ else if (strncmp (arg, "--sysroot=", 10) == 0)
+ target_system_root = arg + 10;
+ else if (strcmp (arg, "--version") == 0)
+ vflag = true;
+ else if (strcmp (arg, "--help") == 0)
+ helpflag = true;
break;
}
}
else
{
/* Saving a full library name. */
- add_to_list (&libs, arg);
- }
+ add_to_list (&libs, arg);
+ }
#endif
}
}
}
/* The AIX linker will discard static constructors in object files if
- nothing else in the file is referenced, so look at them first. */
+ nothing else in the file is referenced, so look at them first. Unless
+ we are building a shared object, ignore the eh frame tables, as we
+ would otherwise reference them all, hence drag all the corresponding
+ objects even if nothing else is referenced. */
{
- const char **export_object_lst = (const char **)object_lst;
+ const char **export_object_lst
+ = CONST_CAST2 (const char **, char **, object_lst);
- while (export_object_lst < object)
- scan_prog_file (*export_object_lst++, PASS_OBJ);
- }
- {
struct id *list = libs.first;
+ /* Compute the filter to use from the current one, do scan, then adjust
+ the "current" filter to remove what we just included here. This will
+ control whether we need a first pass link later on or not, and what
+ will remain to be scanned there. */
+
+ scanfilter this_filter = ld1_filter;
+#if HAVE_AS_REF
+ if (!shared_obj)
+ this_filter &= ~SCAN_DWEH;
+#endif
+
+ while (export_object_lst < object)
+ scan_prog_file (*export_object_lst++, PASS_OBJ, this_filter);
+
for (; list; list = list->next)
- scan_prog_file (list->name, PASS_FIRST);
+ scan_prog_file (list->name, PASS_FIRST, this_filter);
+
+ ld1_filter = ld1_filter & ~this_filter;
}
if (exports.first)
exportf = fopen (export_file, "w");
if (exportf == (FILE *) 0)
- fatal_perror ("fopen %s", export_file);
+ fatal_error ("fopen %s: %m", export_file);
write_aix_file (exportf, exports.first);
if (fclose (exportf))
- fatal_perror ("fclose %s", export_file);
+ fatal_error ("fclose %s: %m", export_file);
}
#endif
*c_ptr = *ld1 = *object = (char *) 0;
if (vflag)
+ notice ("collect2 version %s\n", version_string);
+
+ if (helpflag)
{
- notice ("collect2 version %s", version_string);
-#ifdef TARGET_VERSION
- TARGET_VERSION;
-#endif
- fprintf (stderr, "\n");
+ printf ("Usage: collect2 [options]\n");
+ printf (" Wrap linker and generate constructor code if needed.\n");
+ printf (" Options:\n");
+ printf (" -debug Enable debug output\n");
+ printf (" --help Display this information\n");
+ printf (" -v, --version Display this program's version number\n");
+ printf ("\n");
+ printf ("Overview: http://gcc.gnu.org/onlinedocs/gccint/Collect2.html\n");
+ printf ("Report bugs: %s\n", bug_report_url);
+ printf ("\n");
}
if (debug)
}
/* Load the program, searching all libraries and attempting to provide
- undefined symbols from repository information. */
-
- /* On AIX we do this later. */
-#ifndef COLLECT_EXPORT_LIST
- do_tlink (ld1_argv, object_lst);
-#endif
+ undefined symbols from repository information.
- /* If -r or they will be run via some other method, do not build the
+ If -r or they will be run via some other method, do not build the
constructor or destructor list, just return now. */
- if (rflag
-#ifndef COLLECT_EXPORT_LIST
- || ! do_collecting
-#endif
- )
- {
-#ifdef COLLECT_EXPORT_LIST
- /* Do the link we avoided above if we are exiting. */
+ {
+ bool early_exit
+ = rflag || (! DO_COLLECT_EXPORT_LIST && ! do_collecting);
+
+ /* Perform the first pass link now, if we're about to exit or if we need
+ to scan for things we haven't collected yet before pursuing further.
+
+ On AIX, the latter typically includes nothing for shared objects or
+ frame tables for an executable, out of what the required early scan on
+ objects and libraries has performed above. In the !shared_obj case, we
+ expect the relevant tables to be dragged together with their associated
+ functions from precise cross reference insertions by the compiler. */
+
+ if (early_exit || ld1_filter != SCAN_NOTHING)
do_tlink (ld1_argv, object_lst);
- /* But make sure we delete the export file we may have created. */
- if (export_file != 0 && export_file[0])
- maybe_unlink (export_file);
-#endif
- maybe_unlink (c_file);
- maybe_unlink (o_file);
- return 0;
- }
+ if (early_exit)
+ {
+#ifdef COLLECT_EXPORT_LIST
+ /* Make sure we delete the export file we may have created. */
+ if (export_file != 0 && export_file[0])
+ maybe_unlink (export_file);
+#endif
+ if (lto_mode != LTO_MODE_NONE)
+ maybe_run_lto_and_relink (ld1_argv, object_lst, object, false);
+ else
+ post_ld_pass (false);
+
+ maybe_unlink (c_file);
+ maybe_unlink (o_file);
+ return 0;
+ }
+ }
- /* Examine the namelist with nm and search it for static constructors
- and destructors to call.
- Write the constructor and destructor tables to a .s file and reload. */
+ /* Unless we have done it all already, examine the namelist and search for
+ static constructors and destructors to call. Write the constructor and
+ destructor tables to a .s file and reload. */
- /* On AIX we already scanned for global constructors/destructors. */
-#ifndef COLLECT_EXPORT_LIST
- scan_prog_file (output_file, PASS_FIRST);
-#endif
+ if (ld1_filter != SCAN_NOTHING)
+ scan_prog_file (output_file, PASS_FIRST, ld1_filter);
#ifdef SCAN_LIBRARIES
scan_libraries (output_file);
if (debug)
{
- notice ("%d constructor(s) found\n", constructors.number);
- notice ("%d destructor(s) found\n", destructors.number);
- notice ("%d frame table(s) found\n", frame_tables.number);
+ notice_translated (ngettext ("%d constructor found\n",
+ "%d constructors found\n",
+ constructors.number),
+ constructors.number);
+ notice_translated (ngettext ("%d destructor found\n",
+ "%d destructors found\n",
+ destructors.number),
+ destructors.number);
+ notice_translated (ngettext("%d frame table found\n",
+ "%d frame tables found\n",
+ frame_tables.number),
+ frame_tables.number);
}
+ /* If the scan exposed nothing of special interest, there's no need to
+ generate the glue code and relink so return now. */
+
if (constructors.number == 0 && destructors.number == 0
&& frame_tables.number == 0
#if defined (SCAN_LIBRARIES) || defined (COLLECT_EXPORT_LIST)
#endif
)
{
-#ifdef COLLECT_EXPORT_LIST
- /* Do tlink without additional code generation. */
- do_tlink (ld1_argv, object_lst);
-#endif
+ /* Do tlink without additional code generation now if we didn't
+ do it earlier for scanning purposes. */
+ if (ld1_filter == SCAN_NOTHING)
+ do_tlink (ld1_argv, object_lst);
+
+ if (lto_mode)
+ maybe_run_lto_and_relink (ld1_argv, object_lst, object, false);
+
/* Strip now if it was requested on the command line. */
if (strip_flag)
{
- char **real_strip_argv = xcalloc (sizeof (char *), 3);
- const char ** strip_argv = (const char **) real_strip_argv;
+ char **real_strip_argv = XCNEWVEC (char *, 3);
+ const char ** strip_argv = CONST_CAST2 (const char **, char **,
+ real_strip_argv);
strip_argv[0] = strip_file_name;
strip_argv[1] = output_file;
#ifdef COLLECT_EXPORT_LIST
maybe_unlink (export_file);
#endif
+ post_ld_pass (false);
+
maybe_unlink (c_file);
maybe_unlink (o_file);
return 0;
maybe_unlink(output_file);
outf = fopen (c_file, "w");
if (outf == (FILE *) 0)
- fatal_perror ("fopen %s", c_file);
+ fatal_error ("fopen %s: %m", c_file);
write_c_file (outf, c_file);
if (fclose (outf))
- fatal_perror ("fclose %s", c_file);
+ fatal_error ("fclose %s: %m", c_file);
/* Tell the linker that we have initializer and finalizer functions. */
#ifdef LD_INIT_SWITCH
if (! exports.first)
*ld2++ = concat ("-bE:", export_file, NULL);
+#ifndef LD_INIT_SWITCH
add_to_list (&exports, initname);
add_to_list (&exports, fininame);
add_to_list (&exports, "_GLOBAL__DI");
add_to_list (&exports, "_GLOBAL__DD");
+#endif
exportf = fopen (export_file, "w");
if (exportf == (FILE *) 0)
- fatal_perror ("fopen %s", export_file);
+ fatal_error ("fopen %s: %m", export_file);
write_aix_file (exportf, exports.first);
if (fclose (exportf))
- fatal_perror ("fclose %s", export_file);
+ fatal_error ("fclose %s: %m", export_file);
}
#endif
fork_execute ("gcc", c_argv);
#ifdef COLLECT_EXPORT_LIST
- /* On AIX we must call tlink because of possible templates resolution */
+ /* On AIX we must call tlink because of possible templates resolution. */
do_tlink (ld2_argv, object_lst);
+
+ if (lto_mode)
+ maybe_run_lto_and_relink (ld2_argv, object_lst, object, false);
#else
- /* Otherwise, simply call ld because tlink is already done */
- fork_execute ("ld", ld2_argv);
+ /* Otherwise, simply call ld because tlink is already done. */
+ if (lto_mode)
+ maybe_run_lto_and_relink (ld2_argv, object_lst, object, true);
+ else
+ {
+ fork_execute ("ld", ld2_argv);
+ post_ld_pass (false);
+ }
/* Let scan_prog_file do any final mods (OSF/rose needs this for
constructors/destructors in shared libraries. */
- scan_prog_file (output_file, PASS_SECOND);
+ scan_prog_file (output_file, PASS_SECOND, SCAN_ALL);
#endif
maybe_unlink (c_file);
/* Wait for a process to finish, and exit if a nonzero status is found. */
int
-collect_wait (const char *prog)
+collect_wait (const char *prog, struct pex_obj *pex)
{
int status;
- pwait (pid, &status, 0);
+ if (!pex_get_status (pex, 1, &status))
+ fatal_error ("can't get program status: %m");
+ pex_free (pex);
+
if (status)
{
if (WIFSIGNALED (status))
}
static void
-do_wait (const char *prog)
+do_wait (const char *prog, struct pex_obj *pex)
{
- int ret = collect_wait (prog);
+ int ret = collect_wait (prog, pex);
if (ret != 0)
{
error ("%s returned %d exit status", prog, ret);
collect_exit (ret);
}
+
+ if (response_file)
+ {
+ unlink (response_file);
+ response_file = NULL;
+ }
}
\f
/* Execute a program, and wait for the reply. */
-void
-collect_execute (const char *prog, char **argv, const char *redir)
+struct pex_obj *
+collect_execute (const char *prog, char **argv, const char *outname,
+ const char *errname, int flags)
{
- char *errmsg_fmt;
- char *errmsg_arg;
- int redir_handle = -1;
- int stdout_save = -1;
- int stderr_save = -1;
+ struct pex_obj *pex;
+ const char *errmsg;
+ int err;
+ char *response_arg = NULL;
+ char *response_argv[3] ATTRIBUTE_UNUSED;
+
+ if (HAVE_GNU_LD && at_file_supplied && argv[0] != NULL)
+ {
+ /* If using @file arguments, create a temporary file and put the
+ contents of argv into it. Then change argv to an array corresponding
+ to a single argument @FILE, where FILE is the temporary filename. */
+
+ char **current_argv = argv + 1;
+ char *argv0 = argv[0];
+ int status;
+ FILE *f;
+
+ /* Note: we assume argv contains at least one element; this is
+ checked above. */
+
+ response_file = make_temp_file ("");
+
+ f = fopen (response_file, "w");
+
+ if (f == NULL)
+ fatal_error ("could not open response file %s", response_file);
+
+ status = writeargv (current_argv, f);
+
+ if (status)
+ fatal_error ("could not write to response file %s", response_file);
+
+ status = fclose (f);
+
+ if (EOF == status)
+ fatal_error ("could not close response file %s", response_file);
+
+ response_arg = concat ("@", response_file, NULL);
+ response_argv[0] = argv0;
+ response_argv[1] = response_arg;
+ response_argv[2] = NULL;
+
+ argv = response_argv;
+ }
if (vflag || debug)
{
since we might not end up needing something that we could not find. */
if (argv[0] == 0)
- fatal ("cannot find `%s'", prog);
-
- if (redir)
- {
- /* Open response file. */
- redir_handle = open (redir, O_WRONLY | O_TRUNC | O_CREAT);
-
- /* Duplicate the stdout and stderr file handles
- so they can be restored later. */
- stdout_save = dup (STDOUT_FILENO);
- if (stdout_save == -1)
- fatal_perror ("redirecting stdout: %s", redir);
- stderr_save = dup (STDERR_FILENO);
- if (stderr_save == -1)
- fatal_perror ("redirecting stdout: %s", redir);
-
- /* Redirect stdout & stderr to our response file. */
- dup2 (redir_handle, STDOUT_FILENO);
- dup2 (redir_handle, STDERR_FILENO);
- }
+ fatal_error ("cannot find '%s'", prog);
- pid = pexecute (argv[0], argv, argv[0], NULL, &errmsg_fmt, &errmsg_arg,
- (PEXECUTE_FIRST | PEXECUTE_LAST | PEXECUTE_SEARCH));
+ pex = pex_init (0, "collect2", NULL);
+ if (pex == NULL)
+ fatal_error ("pex_init failed: %m");
- if (redir)
+ errmsg = pex_run (pex, flags, argv[0], argv, outname,
+ errname, &err);
+ if (errmsg != NULL)
{
- /* Restore stdout and stderr to their previous settings. */
- dup2 (stdout_save, STDOUT_FILENO);
- dup2 (stderr_save, STDERR_FILENO);
-
- /* Close response file. */
- close (redir_handle);
+ if (err != 0)
+ {
+ errno = err;
+ fatal_error ("%s: %m", _(errmsg));
+ }
+ else
+ fatal_error (errmsg);
}
- if (pid == -1)
- fatal_perror (errmsg_fmt, errmsg_arg);
+ free (response_arg);
+
+ return pex;
}
static void
fork_execute (const char *prog, char **argv)
{
- collect_execute (prog, argv, NULL);
- do_wait (prog);
+ struct pex_obj *pex;
+
+ pex = collect_execute (prog, argv, NULL, NULL, PEX_LAST | PEX_SEARCH);
+ do_wait (prog, pex);
}
\f
-/* Unlink a file unless we are debugging. */
+/* Unlink FILE unless we are debugging or this is the output_file
+ and we may not unlink it. */
static void
maybe_unlink (const char *file)
{
- if (!debug)
- unlink (file);
- else
- notice ("[Leaving %s]\n", file);
+ if (debug)
+ {
+ notice ("[Leaving %s]\n", file);
+ return;
+ }
+
+ if (file == output_file && !may_unlink_output_file)
+ return;
+
+ unlink_if_ordinary (file);
+}
+
+/* Call maybe_unlink on the NULL-terminated list, FILE_LIST. */
+
+static void
+maybe_unlink_list (char **file_list)
+{
+ char **tmp = file_list;
+
+ while (*tmp)
+ maybe_unlink (*(tmp++));
}
\f
static void
add_to_list (struct head *head_ptr, const char *name)
{
- struct id *newid = xcalloc (sizeof (struct id) + strlen (name), 1);
+ struct id *newid
+ = (struct id *) xcalloc (sizeof (struct id) + strlen (name), 1);
struct id *p;
strcpy (newid->name, name);
|| id->sequence > (*id_ptr)->sequence
/* Hack: do lexical compare, too.
|| (id->sequence == (*id_ptr)->sequence
- && strcmp (id->name, (*id_ptr)->name) > 0) */
+ && strcmp (id->name, (*id_ptr)->name) > 0) */
)
{
id->next = *id_ptr;
}
}
-#if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
-/* Given a STRING, return nonzero if it occurs in the list in range
- [ARGS_BEGIN,ARGS_END). */
-
-static int
-is_in_args (const char *string, const char **args_begin,
- const char **args_end)
-{
- const char **args_pointer;
- for (args_pointer = args_begin; args_pointer != args_end; ++args_pointer)
- if (strcmp (string, *args_pointer) == 0)
- return 1;
- return 0;
-}
-#endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
-
#ifdef COLLECT_EXPORT_LIST
/* This function is really used only on AIX, but may be useful. */
#if 0
int frames = (frame_tables.number > 0);
/* Figure out name of output_file, stripping off .so version. */
- p = strrchr (output_file, '/');
- if (p == 0)
- p = output_file;
- else
- p++;
- q = p;
+ q = p = lbasename (output_file);
+
while (q)
{
q = strchr (q,'.');
}
else
{
- if (strncmp (q, ".so", 3) == 0)
+ if (filename_ncmp (q, SHLIB_SUFFIX, strlen (SHLIB_SUFFIX)) == 0)
{
- q += 3;
+ q += strlen (SHLIB_SUFFIX);
break;
}
else
}
}
/* q points to null at end of the string (or . of the .so version) */
- prefix = xmalloc (q - p + 1);
+ prefix = XNEWVEC (char, q - p + 1);
strncpy (prefix, p, q - p);
prefix[q - p] = 0;
for (r = prefix; *r; r++)
static void
write_c_file (FILE *stream, const char *name)
{
- fprintf (stream, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
#ifndef LD_INIT_SWITCH
if (! shared_obj)
write_c_file_glob (stream, name);
else
#endif
write_c_file_stat (stream, name);
- fprintf (stream, "#ifdef __cplusplus\n}\n#endif\n");
}
#ifdef COLLECT_EXPORT_LIST
\f
#ifdef OBJECT_FORMAT_NONE
-/* Generic version to scan the name list of the loaded program for
- the symbols g++ uses for static constructors and destructors.
+/* Check to make sure the file is an LTO object file. */
+
+static bool
+maybe_lto_object_file (const char *prog_name)
+{
+ FILE *f;
+ unsigned char buf[4];
+ int i;
+
+ static unsigned char elfmagic[4] = { 0x7f, 'E', 'L', 'F' };
+ static unsigned char coffmagic[2] = { 0x4c, 0x01 };
+ static unsigned char coffmagic_x64[2] = { 0x64, 0x86 };
+ static unsigned char machomagic[4][4] = {
+ { 0xcf, 0xfa, 0xed, 0xfe },
+ { 0xce, 0xfa, 0xed, 0xfe },
+ { 0xfe, 0xed, 0xfa, 0xcf },
+ { 0xfe, 0xed, 0xfa, 0xce }
+ };
+
+ f = fopen (prog_name, "rb");
+ if (f == NULL)
+ return false;
+ if (fread (buf, sizeof (buf), 1, f) != 1)
+ buf[0] = 0;
+ fclose (f);
+
+ if (memcmp (buf, elfmagic, sizeof (elfmagic)) == 0
+ || memcmp (buf, coffmagic, sizeof (coffmagic)) == 0
+ || memcmp (buf, coffmagic_x64, sizeof (coffmagic_x64)) == 0)
+ return true;
+ for (i = 0; i < 4; i++)
+ if (memcmp (buf, machomagic[i], sizeof (machomagic[i])) == 0)
+ return true;
+
+ return false;
+}
- The constructor table begins at __CTOR_LIST__ and contains a count
- of the number of pointers (or -1 if the constructors are built in a
- separate section by the linker), followed by the pointers to the
- constructor functions, terminated with a null pointer. The
- destructor table has the same format, and begins at __DTOR_LIST__. */
+/* Generic version to scan the name list of the loaded program for
+ the symbols g++ uses for static constructors and destructors. */
static void
-scan_prog_file (const char *prog_name, enum pass which_pass)
+scan_prog_file (const char *prog_name, scanpass which_pass,
+ scanfilter filter)
{
void (*int_handler) (int);
+#ifdef SIGQUIT
void (*quit_handler) (int);
+#endif
char *real_nm_argv[4];
- const char **nm_argv = (const char **) real_nm_argv;
+ const char **nm_argv = CONST_CAST2 (const char **, char**, real_nm_argv);
int argc = 0;
- int pipe_fd[2];
+ struct pex_obj *pex;
+ const char *errmsg;
+ int err;
char *p, buf[1024];
FILE *inf;
+ int found_lto = 0;
if (which_pass == PASS_SECOND)
return;
+ /* LTO objects must be in a known format. This check prevents
+ us from accepting an archive containing LTO objects, which
+ gcc cannot currently handle. */
+ if (which_pass == PASS_LTOINFO && !maybe_lto_object_file (prog_name))
+ return;
+
/* If we do not have an `nm', complain. */
if (nm_file_name == 0)
- fatal ("cannot find `nm'");
+ fatal_error ("cannot find 'nm'");
nm_argv[argc++] = nm_file_name;
if (NM_FLAGS[0] != '\0')
nm_argv[argc++] = prog_name;
nm_argv[argc++] = (char *) 0;
- if (pipe (pipe_fd) < 0)
- fatal_perror ("pipe");
-
- inf = fdopen (pipe_fd[0], "r");
- if (inf == (FILE *) 0)
- fatal_perror ("fdopen");
-
/* Trace if needed. */
if (vflag)
{
fflush (stdout);
fflush (stderr);
- /* Spawn child nm on pipe. */
- pid = vfork ();
- if (pid == -1)
- fatal_perror (VFORK_STRING);
+ pex = pex_init (PEX_USE_PIPES, "collect2", NULL);
+ if (pex == NULL)
+ fatal_error ("pex_init failed: %m");
- if (pid == 0) /* child context */
+ errmsg = pex_run (pex, 0, nm_file_name, real_nm_argv, NULL, HOST_BIT_BUCKET,
+ &err);
+ if (errmsg != NULL)
{
- /* setup stdout */
- if (dup2 (pipe_fd[1], 1) < 0)
- fatal_perror ("dup2 %d 1", pipe_fd[1]);
-
- if (close (pipe_fd[0]) < 0)
- fatal_perror ("close %d", pipe_fd[0]);
-
- if (close (pipe_fd[1]) < 0)
- fatal_perror ("close %d", pipe_fd[1]);
-
- execv (nm_file_name, real_nm_argv);
- fatal_perror ("execv %s", nm_file_name);
+ if (err != 0)
+ {
+ errno = err;
+ fatal_error ("%s: %m", _(errmsg));
+ }
+ else
+ fatal_error (errmsg);
}
- /* Parent context from here on. */
int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN);
#ifdef SIGQUIT
quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN);
#endif
- if (close (pipe_fd[1]) < 0)
- fatal_perror ("close %d", pipe_fd[1]);
+ inf = pex_read_output (pex, 0);
+ if (inf == NULL)
+ fatal_error ("can't open nm output: %m");
if (debug)
- fprintf (stderr, "\nnm output with constructors/destructors.\n");
+ {
+ if (which_pass == PASS_LTOINFO)
+ fprintf (stderr, "\nnm output with LTO info marker symbol.\n");
+ else
+ fprintf (stderr, "\nnm output with constructors/destructors.\n");
+ }
/* Read each line of nm output. */
while (fgets (buf, sizeof buf, inf) != (char *) 0)
int ch, ch2;
char *name, *end;
+ if (debug)
+ fprintf (stderr, "\t%s\n", buf);
+
+ if (which_pass == PASS_LTOINFO)
+ {
+ if (found_lto)
+ continue;
+
+ /* Look for the LTO info marker symbol, and add filename to
+ the LTO objects list if found. */
+ for (p = buf; (ch = *p) != '\0' && ch != '\n'; p++)
+ if (ch == ' ' && p[1] == '_' && p[2] == '_'
+ && (strncmp (p + (p[3] == '_' ? 2 : 1), "__gnu_lto_v1", 12) == 0)
+ && ISSPACE (p[p[3] == '_' ? 14 : 13]))
+ {
+ add_lto_object (<o_objects, prog_name);
+
+ /* We need to read all the input, so we can't just
+ return here. But we can avoid useless work. */
+ found_lto = 1;
+
+ break;
+ }
+
+ continue;
+ }
+
/* If it contains a constructor or destructor name, add the name
- to the appropriate list. */
+ to the appropriate list unless this is a kind of symbol we're
+ not supposed to even consider. */
for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++)
if (ch == ' ' && p[1] == 'U' && p[2] == ' ')
*end = '\0';
switch (is_ctor_dtor (name))
{
- case 1:
+ case SYM_CTOR:
+ if (! (filter & SCAN_CTOR))
+ break;
if (which_pass != PASS_LIB)
add_to_list (&constructors, name);
break;
- case 2:
+ case SYM_DTOR:
+ if (! (filter & SCAN_DTOR))
+ break;
if (which_pass != PASS_LIB)
add_to_list (&destructors, name);
break;
- case 3:
+ case SYM_INIT:
+ if (! (filter & SCAN_INIT))
+ break;
if (which_pass != PASS_LIB)
- fatal ("init function found in object %s", prog_name);
+ fatal_error ("init function found in object %s", prog_name);
#ifndef LD_INIT_SWITCH
add_to_list (&constructors, name);
#endif
break;
- case 4:
+ case SYM_FINI:
+ if (! (filter & SCAN_FINI))
+ break;
if (which_pass != PASS_LIB)
- fatal ("fini function found in object %s", prog_name);
+ fatal_error ("fini function found in object %s", prog_name);
#ifndef LD_FINI_SWITCH
add_to_list (&destructors, name);
#endif
break;
- case 5:
+ case SYM_DWEH:
+ if (! (filter & SCAN_DWEH))
+ break;
if (which_pass != PASS_LIB)
add_to_list (&frame_tables, name);
break;
default: /* not a constructor or destructor */
continue;
}
-
- if (debug)
- fprintf (stderr, "\t%s\n", buf);
}
if (debug)
fprintf (stderr, "\n");
- if (fclose (inf) != 0)
- fatal_perror ("fclose");
-
- do_wait (nm_file_name);
+ do_wait (nm_file_name, pex);
signal (SIGINT, int_handler);
#ifdef SIGQUIT
#endif
}
-#if SUNOS4_SHARED_LIBRARIES
-
-/* Routines to scan the SunOS 4 _DYNAMIC structure to find shared libraries
- that the output file depends upon and their initialization/finalization
- routines, if any. */
-
-#include <a.out.h>
-#include <fcntl.h>
-#include <link.h>
-#include <sys/mman.h>
-#include <sys/param.h>
-#include <unistd.h>
-#include <sys/dir.h>
-
-/* pointers to the object file */
-unsigned object; /* address of memory mapped file */
-unsigned objsize; /* size of memory mapped to file */
-char * code; /* pointer to code segment */
-char * data; /* pointer to data segment */
-struct nlist *symtab; /* pointer to symbol table */
-struct link_dynamic *ld;
-struct link_dynamic_2 *ld_2;
-struct head libraries;
-
-/* Map the file indicated by NAME into memory and store its address. */
-
-static void
-mapfile (const char *name)
-{
- int fp;
- struct stat s;
- if ((fp = open (name, O_RDONLY)) == -1)
- fatal ("unable to open file '%s'", name);
- if (fstat (fp, &s) == -1)
- fatal ("unable to stat file '%s'", name);
-
- objsize = s.st_size;
- object = (unsigned) mmap (0, objsize, PROT_READ|PROT_WRITE, MAP_PRIVATE,
- fp, 0);
- if (object == (unsigned)-1)
- fatal ("unable to mmap file '%s'", name);
-
- close (fp);
-}
-
-/* Helpers for locatelib. */
-
-static const char *libname;
-
-static int
-libselect (struct direct *d)
-{
- return (strncmp (libname, d->d_name, strlen (libname)) == 0);
-}
-
-/* If one file has an additional numeric extension past LIBNAME, then put
- that one first in the sort. If both files have additional numeric
- extensions, then put the one with the higher number first in the sort.
-
- We must verify that the extension is numeric, because Sun saves the
- original versions of patched libraries with a .FCS extension. Files with
- invalid extensions must go last in the sort, so that they will not be used. */
-
-static int
-libcompare (struct direct **d1, struct direct **d2)
-{
- int i1, i2 = strlen (libname);
- char *e1 = (*d1)->d_name + i2;
- char *e2 = (*d2)->d_name + i2;
-
- while (*e1 && *e2 && *e1 == '.' && *e2 == '.'
- && e1[1] && ISDIGIT (e1[1]) && e2[1] && ISDIGIT (e2[1]))
- {
- ++e1;
- ++e2;
- i1 = strtol (e1, &e1, 10);
- i2 = strtol (e2, &e2, 10);
- if (i1 != i2)
- return i1 - i2;
- }
-
- if (*e1)
- {
- /* It has a valid numeric extension, prefer this one. */
- if (*e1 == '.' && e1[1] && ISDIGIT (e1[1]))
- return 1;
- /* It has an invalid numeric extension, must prefer the other one. */
- else
- return -1;
- }
- else if (*e2)
- {
- /* It has a valid numeric extension, prefer this one. */
- if (*e2 == '.' && e2[1] && ISDIGIT (e2[1]))
- return -1;
- /* It has an invalid numeric extension, must prefer the other one. */
- else
- return 1;
- }
- else
- return 0;
-}
-
-/* Given the name NAME of a dynamic dependency, find its pathname and add
- it to the list of libraries. */
-
-static void
-locatelib (const char *name)
-{
- static const char **l;
- static int cnt;
- char buf[MAXPATHLEN];
- char *p, *q;
- const char **pp;
-
- if (l == 0)
- {
- char *ld_rules;
- char *ldr = 0;
- /* counting elements in array, need 1 extra for null */
- cnt = 1;
- ld_rules = (char *) (ld_2->ld_rules + code);
- if (ld_rules)
- {
- cnt++;
- for (; *ld_rules != 0; ld_rules++)
- if (*ld_rules == ':')
- cnt++;
- ld_rules = (char *) (ld_2->ld_rules + code);
- ldr = xstrdup (ld_rules);
- }
- p = getenv ("LD_LIBRARY_PATH");
- q = 0;
- if (p)
- {
- cnt++;
- for (q = p ; *q != 0; q++)
- if (*q == ':')
- cnt++;
- q = xstrdup (p);
- }
- l = xmalloc ((cnt + 3) * sizeof (char *));
- pp = l;
- if (ldr)
- {
- *pp++ = ldr;
- for (; *ldr != 0; ldr++)
- if (*ldr == ':')
- {
- *ldr++ = 0;
- *pp++ = ldr;
- }
- }
- if (q)
- {
- *pp++ = q;
- for (; *q != 0; q++)
- if (*q == ':')
- {
- *q++ = 0;
- *pp++ = q;
- }
- }
- /* built in directories are /lib, /usr/lib, and /usr/local/lib */
- *pp++ = "/lib";
- *pp++ = "/usr/lib";
- *pp++ = "/usr/local/lib";
- *pp = 0;
- }
- libname = name;
- for (pp = l; *pp != 0 ; pp++)
- {
- struct direct **namelist;
- int entries;
- if ((entries = scandir (*pp, &namelist, libselect, libcompare)) > 0)
- {
- sprintf (buf, "%s/%s", *pp, namelist[entries - 1]->d_name);
- add_to_list (&libraries, buf);
- if (debug)
- fprintf (stderr, "%s\n", buf);
- break;
- }
- }
- if (*pp == 0)
- {
- if (debug)
- notice ("not found\n");
- else
- fatal ("dynamic dependency %s not found", name);
- }
-}
-
-/* Scan the _DYNAMIC structure of the output file to find shared libraries
- that it depends upon and any constructors or destructors they contain. */
-
-static void
-scan_libraries (const char *prog_name)
-{
- struct exec *header;
- char *base;
- struct link_object *lo;
- char buff[MAXPATHLEN];
- struct id *list;
-
- mapfile (prog_name);
- header = (struct exec *)object;
- if (N_BADMAG (*header))
- fatal ("bad magic number in file '%s'", prog_name);
- if (header->a_dynamic == 0)
- return;
-
- code = (char *) (N_TXTOFF (*header) + (long) header);
- data = (char *) (N_DATOFF (*header) + (long) header);
- symtab = (struct nlist *) (N_SYMOFF (*header) + (long) header);
-
- if (header->a_magic == ZMAGIC && header->a_entry == 0x20)
- {
- /* shared object */
- ld = (struct link_dynamic *) (symtab->n_value + code);
- base = code;
- }
- else
- {
- /* executable */
- ld = (struct link_dynamic *) data;
- base = code-PAGSIZ;
- }
-
- if (debug)
- notice ("dynamic dependencies.\n");
-
- ld_2 = (struct link_dynamic_2 *) ((long) ld->ld_un.ld_2 + (long)base);
- for (lo = (struct link_object *) ld_2->ld_need; lo;
- lo = (struct link_object *) lo->lo_next)
- {
- char *name;
- lo = (struct link_object *) ((long) lo + code);
- name = (char *) (code + lo->lo_name);
- if (lo->lo_library)
- {
- if (debug)
- fprintf (stderr, "\t-l%s.%d => ", name, lo->lo_major);
- sprintf (buff, "lib%s.so.%d.%d", name, lo->lo_major, lo->lo_minor);
- locatelib (buff);
- }
- else
- {
- if (debug)
- fprintf (stderr, "\t%s\n", name);
- add_to_list (&libraries, name);
- }
- }
-
- if (debug)
- fprintf (stderr, "\n");
-
- /* now iterate through the library list adding their symbols to
- the list. */
- for (list = libraries.first; list; list = list->next)
- scan_prog_file (list->name, PASS_LIB);
-}
-
-#else /* SUNOS4_SHARED_LIBRARIES */
#ifdef LDD_SUFFIX
/* Use the List Dynamic Dependencies program to find shared libraries that
static struct head libraries; /* list of shared libraries found */
struct id *list;
void (*int_handler) (int);
+#ifdef SIGQUIT
void (*quit_handler) (int);
+#endif
char *real_ldd_argv[4];
- const char **ldd_argv = (const char **) real_ldd_argv;
+ const char **ldd_argv = CONST_CAST2 (const char **, char **, real_ldd_argv);
int argc = 0;
- int pipe_fd[2];
+ struct pex_obj *pex;
+ const char *errmsg;
+ int err;
char buf[1024];
FILE *inf;
/* If we do not have an `ldd', complain. */
if (ldd_file_name == 0)
{
- error ("cannot find `ldd'");
+ error ("cannot find 'ldd'");
return;
}
ldd_argv[argc++] = prog_name;
ldd_argv[argc++] = (char *) 0;
- if (pipe (pipe_fd) < 0)
- fatal_perror ("pipe");
-
- inf = fdopen (pipe_fd[0], "r");
- if (inf == (FILE *) 0)
- fatal_perror ("fdopen");
-
/* Trace if needed. */
if (vflag)
{
fflush (stdout);
fflush (stderr);
- /* Spawn child ldd on pipe. */
- pid = vfork ();
- if (pid == -1)
- fatal_perror (VFORK_STRING);
+ pex = pex_init (PEX_USE_PIPES, "collect2", NULL);
+ if (pex == NULL)
+ fatal_error ("pex_init failed: %m");
- if (pid == 0) /* child context */
+ errmsg = pex_run (pex, 0, ldd_file_name, real_ldd_argv, NULL, NULL, &err);
+ if (errmsg != NULL)
{
- /* setup stdout */
- if (dup2 (pipe_fd[1], 1) < 0)
- fatal_perror ("dup2 %d 1", pipe_fd[1]);
-
- if (close (pipe_fd[0]) < 0)
- fatal_perror ("close %d", pipe_fd[0]);
-
- if (close (pipe_fd[1]) < 0)
- fatal_perror ("close %d", pipe_fd[1]);
-
- execv (ldd_file_name, real_ldd_argv);
- fatal_perror ("execv %s", ldd_file_name);
+ if (err != 0)
+ {
+ errno = err;
+ fatal_error ("%s: %m", _(errmsg));
+ }
+ else
+ fatal_error (errmsg);
}
- /* Parent context from here on. */
int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN);
#ifdef SIGQUIT
quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN);
#endif
- if (close (pipe_fd[1]) < 0)
- fatal_perror ("close %d", pipe_fd[1]);
+ inf = pex_read_output (pex, 0);
+ if (inf == NULL)
+ fatal_error ("can't open ldd output: %m");
if (debug)
notice ("\nldd output with constructors/destructors.\n");
name = p;
if (strncmp (name, "not found", sizeof ("not found") - 1) == 0)
- fatal ("dynamic dependency %s not found", buf);
+ fatal_error ("dynamic dependency %s not found", buf);
/* Find the end of the symbol name. */
for (end = p;
*end = '\0';
if (access (name, R_OK) == 0)
- add_to_list (&libraries, name);
+ add_to_list (&libraries, name);
else
- fatal ("unable to open dynamic dependency '%s'", buf);
+ fatal_error ("unable to open dynamic dependency '%s'", buf);
if (debug)
fprintf (stderr, "\t%s\n", buf);
if (debug)
fprintf (stderr, "\n");
- if (fclose (inf) != 0)
- fatal_perror ("fclose");
-
- do_wait (ldd_file_name);
+ do_wait (ldd_file_name, pex);
signal (SIGINT, int_handler);
#ifdef SIGQUIT
signal (SIGQUIT, quit_handler);
#endif
- /* now iterate through the library list adding their symbols to
+ /* Now iterate through the library list adding their symbols to
the list. */
for (list = libraries.first; list; list = list->next)
- scan_prog_file (list->name, PASS_LIB);
+ scan_prog_file (list->name, PASS_LIB, SCAN_ALL);
}
#endif /* LDD_SUFFIX */
-#endif /* SUNOS4_SHARED_LIBRARIES */
#endif /* OBJECT_FORMAT_NONE */
# if defined (C_WEAKEXT)
# define GCC_OK_SYMBOL(X) \
(((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
- ((X).n_scnum > N_UNDEF) && \
- (aix64_flag \
- || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
- || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
+ ((X).n_scnum > N_UNDEF) && \
+ (aix64_flag \
+ || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
+ || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
# define GCC_UNDEF_SYMBOL(X) \
(((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
- ((X).n_scnum == N_UNDEF))
+ ((X).n_scnum == N_UNDEF))
# else
# define GCC_OK_SYMBOL(X) \
(((X).n_sclass == C_EXT) && \
- ((X).n_scnum > N_UNDEF) && \
- (aix64_flag \
- || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
- || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
+ ((X).n_scnum > N_UNDEF) && \
+ (aix64_flag \
+ || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
+ || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
# define GCC_UNDEF_SYMBOL(X) \
(((X).n_sclass == C_EXT) && ((X).n_scnum == N_UNDEF))
# endif
# define GCC_SYMZERO(X) 0
/* 0757 = U803XTOCMAGIC (AIX 4.3) and 0767 = U64_TOCMAGIC (AIX V5) */
-#ifdef _AIX51
+#if TARGET_AIX_VERSION >= 51
# define GCC_CHECK_HDR(X) \
- ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
- || (HEADER (X).f_magic == 0767 && aix64_flag))
+ (((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
+ || (HEADER (X).f_magic == 0767 && aix64_flag)) \
+ && !(HEADER (X).f_flags & F_LOADONLY))
#else
# define GCC_CHECK_HDR(X) \
- ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
- || (HEADER (X).f_magic == 0757 && aix64_flag))
+ (((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
+ || (HEADER (X).f_magic == 0757 && aix64_flag)) \
+ && !(HEADER (X).f_flags & F_LOADONLY))
#endif
#endif
static int
ignore_library (const char *name)
{
- const char *const *p = &aix_std_libs[0];
- while (*p++ != NULL)
- if (! strcmp (name, *p)) return 1;
+ const char *const *p;
+ size_t length;
+
+ if (target_system_root[0] != '\0')
+ {
+ length = strlen (target_system_root);
+ if (strncmp (name, target_system_root, length) != 0)
+ return 0;
+ name += length;
+ }
+ for (p = &aix_std_libs[0]; *p != NULL; ++p)
+ if (strcmp (name, *p) == 0)
+ return 1;
return 0;
}
#endif /* COLLECT_EXPORT_LIST */
#endif
/* COFF version to scan the name list of the loaded program for
- the symbols g++ uses for static constructors and destructors.
-
- The constructor table begins at __CTOR_LIST__ and contains a count
- of the number of pointers (or -1 if the constructors are built in a
- separate section by the linker), followed by the pointers to the
- constructor functions, terminated with a null pointer. The
- destructor table has the same format, and begins at __DTOR_LIST__. */
+ the symbols g++ uses for static constructors and destructors. */
static void
-scan_prog_file (const char *prog_name, enum pass which_pass)
+scan_prog_file (const char *prog_name, scanpass which_pass,
+ scanfilter filter)
{
LDFILE *ldptr = NULL;
int sym_index, sym_count;
{
#endif
/* Some platforms (e.g. OSF4) declare ldopen as taking a
- non-const char * filename parameter, even though it will not
- modify that string. So we must cast away const-ness here,
- which will cause -Wcast-qual to burp. */
- if ((ldptr = ldopen ((char *)prog_name, ldptr)) != NULL)
+ non-const char * filename parameter, even though it will not
+ modify that string. So we must cast away const-ness here,
+ using CONST_CAST to prevent complaints from -Wcast-qual. */
+ if ((ldptr = ldopen (CONST_CAST (char *, prog_name), ldptr)) != NULL)
{
if (! MY_ISCOFF (HEADER (ldptr).f_magic))
- fatal ("%s: not a COFF file", prog_name);
+ fatal_error ("%s: not a COFF file", prog_name);
if (GCC_CHECK_HDR (ldptr))
{
char *name;
if ((name = ldgetname (ldptr, &symbol)) == NULL)
- continue; /* should never happen */
+ continue; /* Should never happen. */
#ifdef XCOFF_DEBUGGING_INFO
/* All AIX function names have a duplicate entry
switch (is_ctor_dtor (name))
{
- case 1:
+ case SYM_CTOR:
+ if (! (filter & SCAN_CTOR))
+ break;
if (! is_shared)
add_to_list (&constructors, name);
-#ifdef COLLECT_EXPORT_LIST
+#if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
if (which_pass == PASS_OBJ)
add_to_list (&exports, name);
#endif
break;
- case 2:
+ case SYM_DTOR:
+ if (! (filter & SCAN_DTOR))
+ break;
if (! is_shared)
add_to_list (&destructors, name);
-#ifdef COLLECT_EXPORT_LIST
+#if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
if (which_pass == PASS_OBJ)
add_to_list (&exports, name);
#endif
break;
#ifdef COLLECT_EXPORT_LIST
- case 3:
+ case SYM_INIT:
+ if (! (filter & SCAN_INIT))
+ break;
#ifndef LD_INIT_SWITCH
if (is_shared)
add_to_list (&constructors, name);
#endif
break;
- case 4:
+ case SYM_FINI:
+ if (! (filter & SCAN_FINI))
+ break;
#ifndef LD_INIT_SWITCH
if (is_shared)
add_to_list (&destructors, name);
break;
#endif
- case 5:
+ case SYM_DWEH:
+ if (! (filter & SCAN_DWEH))
+ break;
if (! is_shared)
add_to_list (&frame_tables, name);
-#ifdef COLLECT_EXPORT_LIST
+#if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
if (which_pass == PASS_OBJ)
add_to_list (&exports, name);
#endif
default: /* not a constructor or destructor */
#ifdef COLLECT_EXPORT_LIST
- /* If we are building a shared object on AIX we need
- to explicitly export all global symbols. */
- if (shared_obj)
- {
- if (which_pass == PASS_OBJ && (! export_flag))
- add_to_list (&exports, name);
- }
+ /* Explicitly export all global symbols when
+ building a shared object on AIX, but do not
+ re-export symbols from another shared object
+ and do not export symbols if the user
+ provides an explicit export list. */
+ if (shared_obj && !is_shared
+ && which_pass == PASS_OBJ && !export_flag)
+ add_to_list (&exports, name);
#endif
continue;
}
}
else
{
- fatal ("%s: cannot open as COFF file", prog_name);
+ fatal_error ("%s: cannot open as COFF file", prog_name);
}
#ifdef COLLECT_EXPORT_LIST
/* On AIX loop continues while there are more members in archive. */
{
char *lib_buf;
int i, j, l = 0;
+ /* Library extensions for AIX dynamic linking. */
+ const char * const libexts[2] = {"a", "so"};
for (i = 0; libpaths[i]; i++)
if (libpaths[i]->max_len > l)
l = libpaths[i]->max_len;
- lib_buf = xmalloc (l + strlen(name) + 10);
+ lib_buf = XNEWVEC (char, l + strlen(name) + 10);
for (i = 0; libpaths[i]; i++)
{
for (; list; list = list->next)
{
/* The following lines are needed because path_prefix list
- may contain directories both with trailing '/' and
+ may contain directories both with trailing DIR_SEPARATOR and
without it. */
const char *p = "";
- if (list->prefix[strlen(list->prefix)-1] != '/')
+ if (!IS_DIR_SEPARATOR (list->prefix[strlen(list->prefix)-1]))
p = "/";
- for (j = 0; libexts[j]; j++)
+ for (j = 0; j < 2; j++)
{
sprintf (lib_buf, "%s%slib%s.%s",
- list->prefix, p, name, libexts[j]);
-if (debug) fprintf (stderr, "searching for: %s\n", lib_buf);
+ list->prefix, p, name,
+ libexts[(j + aixrtl_flag) % 2]);
+ if (debug) fprintf (stderr, "searching for: %s\n", lib_buf);
if (file_exists (lib_buf))
{
-if (debug) fprintf (stderr, "found: %s\n", lib_buf);
+ if (debug) fprintf (stderr, "found: %s\n", lib_buf);
return (lib_buf);
}
}
if (debug)
fprintf (stderr, "not found\n");
else
- fatal ("library lib%s not found", name);
+ fatal_error ("library lib%s not found", name);
return (NULL);
}
#endif /* COLLECT_EXPORT_LIST */
+
+#ifdef COLLECT_RUN_DSYMUTIL
+static int flag_dsym = false;
+static int flag_idsym = false;
+
+static void
+process_args (int *argcp, char **argv) {
+ int i, j;
+ int argc = *argcp;
+ for (i=0; i<argc; ++i)
+ {
+ if (strcmp (argv[i], "-dsym") == 0)
+ {
+ flag_dsym = true;
+ /* Remove the flag, as we handle all processing for it. */
+ j = i;
+ do
+ argv[j] = argv[j+1];
+ while (++j < argc);
+ --i;
+ argc = --(*argcp);
+ }
+ else if (strcmp (argv[i], "-idsym") == 0)
+ {
+ flag_idsym = true;
+ /* Remove the flag, as we handle all processing for it. */
+ j = i;
+ do
+ argv[j] = argv[j+1];
+ while (++j < argc);
+ --i;
+ argc = --(*argcp);
+ }
+ }
+}
+
+static void
+do_dsymutil (const char *output_file) {
+ const char *dsymutil = DSYMUTIL + 1;
+ struct pex_obj *pex;
+ char **real_argv = XCNEWVEC (char *, 3);
+ const char ** argv = CONST_CAST2 (const char **, char **,
+ real_argv);
+
+ argv[0] = dsymutil;
+ argv[1] = output_file;
+ argv[2] = (char *) 0;
+
+ pex = collect_execute (dsymutil, real_argv, NULL, NULL, PEX_LAST | PEX_SEARCH);
+ do_wait (dsymutil, pex);
+}
+
+static void
+post_ld_pass (bool temp_file) {
+ if (!(temp_file && flag_idsym) && !flag_dsym)
+ return;
+
+ do_dsymutil (output_file);
+}
+#else
+static void
+process_args (int *argcp ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) { }
+static void post_ld_pass (bool temp_file ATTRIBUTE_UNUSED) { }
+#endif