[deliverable/binutils-gdb.git] / gdbsupport / gdb-dlfcn.cc

/* Platform independent shared object routines for GDB.

   Copyright (C) 2011-2020 Free Software Foundation, Inc.

   This file is part of GDB.

   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 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.  */

#include "common-defs.h"
#include "gdb-dlfcn.h"

#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#elif __MINGW32__
#include <windows.h>
#else
/* Unsupported configuration. */
#define NO_SHARED_LIB
#endif

#ifdef NO_SHARED_LIB

gdb_dlhandle_up
gdb_dlopen (const char *filename)
{
  gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
}

void *
gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
{
  gdb_assert_not_reached ("gdb_dlsym should not be called on this platform.");
}

void
dlclose_deleter::operator() (void *handle) const
{
  gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
}

int
is_dl_available (void)
{
  return 0;
}

#else /* NO_SHARED_LIB */

gdb_dlhandle_up
gdb_dlopen (const char *filename)
{
  void *result;
#ifdef HAVE_DLFCN_H
  result = dlopen (filename, RTLD_NOW);
#elif __MINGW32__
  result = (void *) LoadLibrary (filename);
#endif
  if (result != NULL)
    return gdb_dlhandle_up (result);

#ifdef HAVE_DLFCN_H
  error (_("Could not load %s: %s"), filename, dlerror());
#else
  {
    LPVOID buffer;
    DWORD dw;

    dw = GetLastError();

    FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
                   FORMAT_MESSAGE_IGNORE_INSERTS,
                   NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                   (LPTSTR) &buffer,
                   0, NULL);

    error (_("Could not load %s: %s"), filename, (char *) buffer);
  }
#endif
}

void *
gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
{
#ifdef HAVE_DLFCN_H
  return dlsym (handle.get (), symbol);
#elif __MINGW32__
  return (void *) GetProcAddress ((HMODULE) handle.get (), symbol);
#endif
}

void
dlclose_deleter::operator() (void *handle) const
{
#ifdef HAVE_DLFCN_H
  dlclose (handle);
#elif __MINGW32__
  FreeLibrary ((HMODULE) handle);
#endif
}

int
is_dl_available (void)
{
  return 1;
}

#endif /* NO_SHARED_LIB */
Commit	Line	Data
	1	/* Platform independent shared object routines for GDB.
	2
	3	Copyright (C) 2011-2020 Free Software Foundation, Inc.
	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 3 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
	19
	20	#include "common-defs.h"
	21	#include "gdb-dlfcn.h"
	22
	23	#ifdef HAVE_DLFCN_H
	24	#include <dlfcn.h>
	25	#elif __MINGW32__
	26	#include <windows.h>
	27	#else
	28	/* Unsupported configuration. */
	29	#define NO_SHARED_LIB
	30	#endif
	31
	32	#ifdef NO_SHARED_LIB
	33
	34	gdb_dlhandle_up
	35	gdb_dlopen (const char *filename)
	36	{
	37	gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
	38	}
	39
	40	void *
	41	gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
	42	{
	43	gdb_assert_not_reached ("gdb_dlsym should not be called on this platform.");
	44	}
	45
	46	void
	47	dlclose_deleter::operator() (void *handle) const
	48	{
	49	gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
	50	}
	51
	52	int
	53	is_dl_available (void)
	54	{
	55	return 0;
	56	}
	57
	58	#else /* NO_SHARED_LIB */
	59
	60	gdb_dlhandle_up
	61	gdb_dlopen (const char *filename)
	62	{
	63	void *result;
	64	#ifdef HAVE_DLFCN_H
	65	result = dlopen (filename, RTLD_NOW);
	66	#elif __MINGW32__
	67	result = (void *) LoadLibrary (filename);
	68	#endif
	69	if (result != NULL)
	70	return gdb_dlhandle_up (result);
	71
	72	#ifdef HAVE_DLFCN_H
	73	error (_("Could not load %s: %s"), filename, dlerror());
	74	#else
	75	{
	76	LPVOID buffer;
	77	DWORD dw;
	78
	79	dw = GetLastError();
	80
	81	FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER \| FORMAT_MESSAGE_FROM_SYSTEM \|
	82	FORMAT_MESSAGE_IGNORE_INSERTS,
	83	NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
	84	(LPTSTR) &buffer,
	85	0, NULL);
	86
	87	error (_("Could not load %s: %s"), filename, (char *) buffer);
	88	}
	89	#endif
	90	}
	91
	92	void *
	93	gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
	94	{
	95	#ifdef HAVE_DLFCN_H
	96	return dlsym (handle.get (), symbol);
	97	#elif __MINGW32__
	98	return (void *) GetProcAddress ((HMODULE) handle.get (), symbol);
	99	#endif
	100	}
	101
	102	void
	103	dlclose_deleter::operator() (void *handle) const
	104	{
	105	#ifdef HAVE_DLFCN_H
	106	dlclose (handle);
	107	#elif __MINGW32__
	108	FreeLibrary ((HMODULE) handle);
	109	#endif
	110	}
	111
	112	int
	113	is_dl_available (void)
	114	{
	115	return 1;
	116	}
	117
	118	#endif /* NO_SHARED_LIB */