/* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
|
/* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
|
Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
|
Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
|
2006, 2007 Free Software Foundation, Inc.
|
2006, 2007 Free Software Foundation, Inc.
|
|
|
This file is part of GCC.
|
This file is part of GCC.
|
|
|
GCC is free software; you can redistribute it and/or modify it under
|
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
|
the terms of the GNU General Public License as published by the Free
|
Software Foundation; either version 3, or (at your option) any later
|
Software Foundation; either version 3, or (at your option) any later
|
version.
|
version.
|
|
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
for more details.
|
for more details.
|
|
|
You should have received a copy of the GNU General Public License
|
You should have received a copy of the GNU General Public License
|
along with GCC; see the file COPYING3. If not see
|
along with GCC; see the file COPYING3. If not see
|
<http://www.gnu.org/licenses/>. */
|
<http://www.gnu.org/licenses/>. */
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|
|
#include "config.h"
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#include "config.h"
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#include "system.h"
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#include "system.h"
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#include "coretypes.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tm.h"
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#include "rtl.h"
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#include "rtl.h"
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#include "tree.h"
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#include "tree.h"
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#include "function.h"
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#include "function.h"
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#include "cpplib.h"
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#include "cpplib.h"
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#include "c-pragma.h"
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#include "c-pragma.h"
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#include "flags.h"
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#include "flags.h"
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#include "toplev.h"
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#include "toplev.h"
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#include "ggc.h"
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#include "ggc.h"
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#include "c-common.h"
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#include "c-common.h"
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#include "output.h"
|
#include "output.h"
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#include "tm_p.h"
|
#include "tm_p.h"
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#include "vec.h"
|
#include "vec.h"
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#include "target.h"
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#include "target.h"
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#include "diagnostic.h"
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#include "diagnostic.h"
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#include "opts.h"
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#include "opts.h"
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|
|
#define GCC_BAD(gmsgid) \
|
#define GCC_BAD(gmsgid) \
|
do { warning (OPT_Wpragmas, gmsgid); return; } while (0)
|
do { warning (OPT_Wpragmas, gmsgid); return; } while (0)
|
#define GCC_BAD2(gmsgid, arg) \
|
#define GCC_BAD2(gmsgid, arg) \
|
do { warning (OPT_Wpragmas, gmsgid, arg); return; } while (0)
|
do { warning (OPT_Wpragmas, gmsgid, arg); return; } while (0)
|
|
|
typedef struct align_stack GTY(())
|
typedef struct align_stack GTY(())
|
{
|
{
|
int alignment;
|
int alignment;
|
tree id;
|
tree id;
|
struct align_stack * prev;
|
struct align_stack * prev;
|
} align_stack;
|
} align_stack;
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|
|
static GTY(()) struct align_stack * alignment_stack;
|
static GTY(()) struct align_stack * alignment_stack;
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|
|
#ifdef HANDLE_PRAGMA_PACK
|
#ifdef HANDLE_PRAGMA_PACK
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static void handle_pragma_pack (cpp_reader *);
|
static void handle_pragma_pack (cpp_reader *);
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|
|
#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
|
#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
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/* If we have a "global" #pragma pack(<n>) in effect when the first
|
/* If we have a "global" #pragma pack(<n>) in effect when the first
|
#pragma pack(push,<n>) is encountered, this stores the value of
|
#pragma pack(push,<n>) is encountered, this stores the value of
|
maximum_field_alignment in effect. When the final pop_alignment()
|
maximum_field_alignment in effect. When the final pop_alignment()
|
happens, we restore the value to this, not to a value of 0 for
|
happens, we restore the value to this, not to a value of 0 for
|
maximum_field_alignment. Value is in bits. */
|
maximum_field_alignment. Value is in bits. */
|
static int default_alignment;
|
static int default_alignment;
|
#define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = *(alignment_stack == NULL \
|
#define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = *(alignment_stack == NULL \
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? &default_alignment \
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? &default_alignment \
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: &alignment_stack->alignment) = (ALIGN))
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: &alignment_stack->alignment) = (ALIGN))
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|
|
static void push_alignment (int, tree);
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static void push_alignment (int, tree);
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static void pop_alignment (tree);
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static void pop_alignment (tree);
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|
|
/* Push an alignment value onto the stack. */
|
/* Push an alignment value onto the stack. */
|
static void
|
static void
|
push_alignment (int alignment, tree id)
|
push_alignment (int alignment, tree id)
|
{
|
{
|
align_stack * entry;
|
align_stack * entry;
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|
|
entry = GGC_NEW (align_stack);
|
entry = GGC_NEW (align_stack);
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|
|
entry->alignment = alignment;
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entry->alignment = alignment;
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entry->id = id;
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entry->id = id;
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entry->prev = alignment_stack;
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entry->prev = alignment_stack;
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|
|
/* The current value of maximum_field_alignment is not necessarily
|
/* The current value of maximum_field_alignment is not necessarily
|
0 since there may be a #pragma pack(<n>) in effect; remember it
|
0 since there may be a #pragma pack(<n>) in effect; remember it
|
so that we can restore it after the final #pragma pop(). */
|
so that we can restore it after the final #pragma pop(). */
|
if (alignment_stack == NULL)
|
if (alignment_stack == NULL)
|
default_alignment = maximum_field_alignment;
|
default_alignment = maximum_field_alignment;
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|
|
alignment_stack = entry;
|
alignment_stack = entry;
|
|
|
maximum_field_alignment = alignment;
|
maximum_field_alignment = alignment;
|
}
|
}
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|
|
/* Undo a push of an alignment onto the stack. */
|
/* Undo a push of an alignment onto the stack. */
|
static void
|
static void
|
pop_alignment (tree id)
|
pop_alignment (tree id)
|
{
|
{
|
align_stack * entry;
|
align_stack * entry;
|
|
|
if (alignment_stack == NULL)
|
if (alignment_stack == NULL)
|
GCC_BAD ("#pragma pack (pop) encountered without matching #pragma pack (push)");
|
GCC_BAD ("#pragma pack (pop) encountered without matching #pragma pack (push)");
|
|
|
/* If we got an identifier, strip away everything above the target
|
/* If we got an identifier, strip away everything above the target
|
entry so that the next step will restore the state just below it. */
|
entry so that the next step will restore the state just below it. */
|
if (id)
|
if (id)
|
{
|
{
|
for (entry = alignment_stack; entry; entry = entry->prev)
|
for (entry = alignment_stack; entry; entry = entry->prev)
|
if (entry->id == id)
|
if (entry->id == id)
|
{
|
{
|
alignment_stack = entry;
|
alignment_stack = entry;
|
break;
|
break;
|
}
|
}
|
if (entry == NULL)
|
if (entry == NULL)
|
warning (OPT_Wpragmas, "\
|
warning (OPT_Wpragmas, "\
|
#pragma pack(pop, %s) encountered without matching #pragma pack(push, %s)"
|
#pragma pack(pop, %s) encountered without matching #pragma pack(push, %s)"
|
, IDENTIFIER_POINTER (id), IDENTIFIER_POINTER (id));
|
, IDENTIFIER_POINTER (id), IDENTIFIER_POINTER (id));
|
}
|
}
|
|
|
entry = alignment_stack->prev;
|
entry = alignment_stack->prev;
|
|
|
maximum_field_alignment = entry ? entry->alignment : default_alignment;
|
maximum_field_alignment = entry ? entry->alignment : default_alignment;
|
|
|
alignment_stack = entry;
|
alignment_stack = entry;
|
}
|
}
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#else /* not HANDLE_PRAGMA_PACK_PUSH_POP */
|
#else /* not HANDLE_PRAGMA_PACK_PUSH_POP */
|
#define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = (ALIGN))
|
#define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = (ALIGN))
|
#define push_alignment(ID, N) \
|
#define push_alignment(ID, N) \
|
GCC_BAD ("#pragma pack(push[, id], <n>) is not supported on this target")
|
GCC_BAD ("#pragma pack(push[, id], <n>) is not supported on this target")
|
#define pop_alignment(ID) \
|
#define pop_alignment(ID) \
|
GCC_BAD ("#pragma pack(pop[, id], <n>) is not supported on this target")
|
GCC_BAD ("#pragma pack(pop[, id], <n>) is not supported on this target")
|
#endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
|
#endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
|
|
|
/* #pragma pack ()
|
/* #pragma pack ()
|
#pragma pack (N)
|
#pragma pack (N)
|
|
|
#pragma pack (push)
|
#pragma pack (push)
|
#pragma pack (push, N)
|
#pragma pack (push, N)
|
#pragma pack (push, ID)
|
#pragma pack (push, ID)
|
#pragma pack (push, ID, N)
|
#pragma pack (push, ID, N)
|
#pragma pack (pop)
|
#pragma pack (pop)
|
#pragma pack (pop, ID) */
|
#pragma pack (pop, ID) */
|
static void
|
static void
|
handle_pragma_pack (cpp_reader * ARG_UNUSED (dummy))
|
handle_pragma_pack (cpp_reader * ARG_UNUSED (dummy))
|
{
|
{
|
tree x, id = 0;
|
tree x, id = 0;
|
int align = -1;
|
int align = -1;
|
enum cpp_ttype token;
|
enum cpp_ttype token;
|
enum { set, push, pop } action;
|
enum { set, push, pop } action;
|
|
|
if (pragma_lex (&x) != CPP_OPEN_PAREN)
|
if (pragma_lex (&x) != CPP_OPEN_PAREN)
|
GCC_BAD ("missing %<(%> after %<#pragma pack%> - ignored");
|
GCC_BAD ("missing %<(%> after %<#pragma pack%> - ignored");
|
|
|
token = pragma_lex (&x);
|
token = pragma_lex (&x);
|
if (token == CPP_CLOSE_PAREN)
|
if (token == CPP_CLOSE_PAREN)
|
{
|
{
|
action = set;
|
action = set;
|
align = initial_max_fld_align;
|
align = initial_max_fld_align;
|
}
|
}
|
else if (token == CPP_NUMBER)
|
else if (token == CPP_NUMBER)
|
{
|
{
|
if (TREE_CODE (x) != INTEGER_CST)
|
if (TREE_CODE (x) != INTEGER_CST)
|
GCC_BAD ("invalid constant in %<#pragma pack%> - ignored");
|
GCC_BAD ("invalid constant in %<#pragma pack%> - ignored");
|
align = TREE_INT_CST_LOW (x);
|
align = TREE_INT_CST_LOW (x);
|
action = set;
|
action = set;
|
if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
GCC_BAD ("malformed %<#pragma pack%> - ignored");
|
GCC_BAD ("malformed %<#pragma pack%> - ignored");
|
}
|
}
|
else if (token == CPP_NAME)
|
else if (token == CPP_NAME)
|
{
|
{
|
#define GCC_BAD_ACTION do { if (action != pop) \
|
#define GCC_BAD_ACTION do { if (action != pop) \
|
GCC_BAD ("malformed %<#pragma pack(push[, id][, <n>])%> - ignored"); \
|
GCC_BAD ("malformed %<#pragma pack(push[, id][, <n>])%> - ignored"); \
|
else \
|
else \
|
GCC_BAD ("malformed %<#pragma pack(pop[, id])%> - ignored"); \
|
GCC_BAD ("malformed %<#pragma pack(pop[, id])%> - ignored"); \
|
} while (0)
|
} while (0)
|
|
|
const char *op = IDENTIFIER_POINTER (x);
|
const char *op = IDENTIFIER_POINTER (x);
|
if (!strcmp (op, "push"))
|
if (!strcmp (op, "push"))
|
action = push;
|
action = push;
|
else if (!strcmp (op, "pop"))
|
else if (!strcmp (op, "pop"))
|
action = pop;
|
action = pop;
|
else
|
else
|
GCC_BAD2 ("unknown action %qs for %<#pragma pack%> - ignored", op);
|
GCC_BAD2 ("unknown action %qs for %<#pragma pack%> - ignored", op);
|
|
|
while ((token = pragma_lex (&x)) == CPP_COMMA)
|
while ((token = pragma_lex (&x)) == CPP_COMMA)
|
{
|
{
|
token = pragma_lex (&x);
|
token = pragma_lex (&x);
|
if (token == CPP_NAME && id == 0)
|
if (token == CPP_NAME && id == 0)
|
{
|
{
|
id = x;
|
id = x;
|
}
|
}
|
else if (token == CPP_NUMBER && action == push && align == -1)
|
else if (token == CPP_NUMBER && action == push && align == -1)
|
{
|
{
|
if (TREE_CODE (x) != INTEGER_CST)
|
if (TREE_CODE (x) != INTEGER_CST)
|
GCC_BAD ("invalid constant in %<#pragma pack%> - ignored");
|
GCC_BAD ("invalid constant in %<#pragma pack%> - ignored");
|
align = TREE_INT_CST_LOW (x);
|
align = TREE_INT_CST_LOW (x);
|
if (align == -1)
|
if (align == -1)
|
action = set;
|
action = set;
|
}
|
}
|
else
|
else
|
GCC_BAD_ACTION;
|
GCC_BAD_ACTION;
|
}
|
}
|
|
|
if (token != CPP_CLOSE_PAREN)
|
if (token != CPP_CLOSE_PAREN)
|
GCC_BAD_ACTION;
|
GCC_BAD_ACTION;
|
#undef GCC_BAD_ACTION
|
#undef GCC_BAD_ACTION
|
}
|
}
|
else
|
else
|
GCC_BAD ("malformed %<#pragma pack%> - ignored");
|
GCC_BAD ("malformed %<#pragma pack%> - ignored");
|
|
|
if (pragma_lex (&x) != CPP_EOF)
|
if (pragma_lex (&x) != CPP_EOF)
|
warning (OPT_Wpragmas, "junk at end of %<#pragma pack%>");
|
warning (OPT_Wpragmas, "junk at end of %<#pragma pack%>");
|
|
|
if (flag_pack_struct)
|
if (flag_pack_struct)
|
GCC_BAD ("#pragma pack has no effect with -fpack-struct - ignored");
|
GCC_BAD ("#pragma pack has no effect with -fpack-struct - ignored");
|
|
|
if (action != pop)
|
if (action != pop)
|
switch (align)
|
switch (align)
|
{
|
{
|
case 0:
|
case 0:
|
case 1:
|
case 1:
|
case 2:
|
case 2:
|
case 4:
|
case 4:
|
case 8:
|
case 8:
|
case 16:
|
case 16:
|
align *= BITS_PER_UNIT;
|
align *= BITS_PER_UNIT;
|
break;
|
break;
|
case -1:
|
case -1:
|
if (action == push)
|
if (action == push)
|
{
|
{
|
align = maximum_field_alignment;
|
align = maximum_field_alignment;
|
break;
|
break;
|
}
|
}
|
default:
|
default:
|
GCC_BAD2 ("alignment must be a small power of two, not %d", align);
|
GCC_BAD2 ("alignment must be a small power of two, not %d", align);
|
}
|
}
|
|
|
switch (action)
|
switch (action)
|
{
|
{
|
case set: SET_GLOBAL_ALIGNMENT (align); break;
|
case set: SET_GLOBAL_ALIGNMENT (align); break;
|
case push: push_alignment (align, id); break;
|
case push: push_alignment (align, id); break;
|
case pop: pop_alignment (id); break;
|
case pop: pop_alignment (id); break;
|
}
|
}
|
}
|
}
|
#endif /* HANDLE_PRAGMA_PACK */
|
#endif /* HANDLE_PRAGMA_PACK */
|
|
|
static GTY(()) tree pending_weaks;
|
static GTY(()) tree pending_weaks;
|
|
|
#ifdef HANDLE_PRAGMA_WEAK
|
#ifdef HANDLE_PRAGMA_WEAK
|
static void apply_pragma_weak (tree, tree);
|
static void apply_pragma_weak (tree, tree);
|
static void handle_pragma_weak (cpp_reader *);
|
static void handle_pragma_weak (cpp_reader *);
|
|
|
static void
|
static void
|
apply_pragma_weak (tree decl, tree value)
|
apply_pragma_weak (tree decl, tree value)
|
{
|
{
|
if (value)
|
if (value)
|
{
|
{
|
value = build_string (IDENTIFIER_LENGTH (value),
|
value = build_string (IDENTIFIER_LENGTH (value),
|
IDENTIFIER_POINTER (value));
|
IDENTIFIER_POINTER (value));
|
decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
|
decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
|
build_tree_list (NULL, value)),
|
build_tree_list (NULL, value)),
|
0);
|
0);
|
}
|
}
|
|
|
if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl)
|
if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl)
|
&& !DECL_WEAK (decl) /* Don't complain about a redundant #pragma. */
|
&& !DECL_WEAK (decl) /* Don't complain about a redundant #pragma. */
|
&& TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
|
&& TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
|
warning (OPT_Wpragmas, "applying #pragma weak %q+D after first use "
|
warning (OPT_Wpragmas, "applying #pragma weak %q+D after first use "
|
"results in unspecified behavior", decl);
|
"results in unspecified behavior", decl);
|
|
|
declare_weak (decl);
|
declare_weak (decl);
|
}
|
}
|
|
|
void
|
void
|
maybe_apply_pragma_weak (tree decl)
|
maybe_apply_pragma_weak (tree decl)
|
{
|
{
|
tree *p, t, id;
|
tree *p, t, id;
|
|
|
/* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */
|
/* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */
|
|
|
/* No weak symbols pending, take the short-cut. */
|
/* No weak symbols pending, take the short-cut. */
|
if (!pending_weaks)
|
if (!pending_weaks)
|
return;
|
return;
|
/* If it's not visible outside this file, it doesn't matter whether
|
/* If it's not visible outside this file, it doesn't matter whether
|
it's weak. */
|
it's weak. */
|
if (!DECL_EXTERNAL (decl) && !TREE_PUBLIC (decl))
|
if (!DECL_EXTERNAL (decl) && !TREE_PUBLIC (decl))
|
return;
|
return;
|
/* If it's not a function or a variable, it can't be weak.
|
/* If it's not a function or a variable, it can't be weak.
|
FIXME: what kinds of things are visible outside this file but
|
FIXME: what kinds of things are visible outside this file but
|
aren't functions or variables? Should this be an assert instead? */
|
aren't functions or variables? Should this be an assert instead? */
|
if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
|
if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
|
return;
|
return;
|
|
|
id = DECL_ASSEMBLER_NAME (decl);
|
id = DECL_ASSEMBLER_NAME (decl);
|
|
|
for (p = &pending_weaks; (t = *p) ; p = &TREE_CHAIN (t))
|
for (p = &pending_weaks; (t = *p) ; p = &TREE_CHAIN (t))
|
if (id == TREE_PURPOSE (t))
|
if (id == TREE_PURPOSE (t))
|
{
|
{
|
apply_pragma_weak (decl, TREE_VALUE (t));
|
apply_pragma_weak (decl, TREE_VALUE (t));
|
*p = TREE_CHAIN (t);
|
*p = TREE_CHAIN (t);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
/* Process all "#pragma weak A = B" directives where we have not seen
|
/* Process all "#pragma weak A = B" directives where we have not seen
|
a decl for A. */
|
a decl for A. */
|
void
|
void
|
maybe_apply_pending_pragma_weaks (void)
|
maybe_apply_pending_pragma_weaks (void)
|
{
|
{
|
tree *p, t, alias_id, id, decl, *next;
|
tree *p, t, alias_id, id, decl, *next;
|
|
|
for (p = &pending_weaks; (t = *p) ; p = next)
|
for (p = &pending_weaks; (t = *p) ; p = next)
|
{
|
{
|
next = &TREE_CHAIN (t);
|
next = &TREE_CHAIN (t);
|
alias_id = TREE_PURPOSE (t);
|
alias_id = TREE_PURPOSE (t);
|
id = TREE_VALUE (t);
|
id = TREE_VALUE (t);
|
|
|
if (TREE_VALUE (t) == NULL)
|
if (TREE_VALUE (t) == NULL)
|
continue;
|
continue;
|
|
|
decl = build_decl (FUNCTION_DECL, alias_id, default_function_type);
|
decl = build_decl (FUNCTION_DECL, alias_id, default_function_type);
|
|
|
DECL_ARTIFICIAL (decl) = 1;
|
DECL_ARTIFICIAL (decl) = 1;
|
TREE_PUBLIC (decl) = 1;
|
TREE_PUBLIC (decl) = 1;
|
DECL_EXTERNAL (decl) = 1;
|
DECL_EXTERNAL (decl) = 1;
|
DECL_WEAK (decl) = 1;
|
DECL_WEAK (decl) = 1;
|
|
|
assemble_alias (decl, id);
|
assemble_alias (decl, id);
|
}
|
}
|
}
|
}
|
|
|
/* #pragma weak name [= value] */
|
/* #pragma weak name [= value] */
|
static void
|
static void
|
handle_pragma_weak (cpp_reader * ARG_UNUSED (dummy))
|
handle_pragma_weak (cpp_reader * ARG_UNUSED (dummy))
|
{
|
{
|
tree name, value, x, decl;
|
tree name, value, x, decl;
|
enum cpp_ttype t;
|
enum cpp_ttype t;
|
|
|
value = 0;
|
value = 0;
|
|
|
if (pragma_lex (&name) != CPP_NAME)
|
if (pragma_lex (&name) != CPP_NAME)
|
GCC_BAD ("malformed #pragma weak, ignored");
|
GCC_BAD ("malformed #pragma weak, ignored");
|
t = pragma_lex (&x);
|
t = pragma_lex (&x);
|
if (t == CPP_EQ)
|
if (t == CPP_EQ)
|
{
|
{
|
if (pragma_lex (&value) != CPP_NAME)
|
if (pragma_lex (&value) != CPP_NAME)
|
GCC_BAD ("malformed #pragma weak, ignored");
|
GCC_BAD ("malformed #pragma weak, ignored");
|
t = pragma_lex (&x);
|
t = pragma_lex (&x);
|
}
|
}
|
if (t != CPP_EOF)
|
if (t != CPP_EOF)
|
warning (OPT_Wpragmas, "junk at end of %<#pragma weak%>");
|
warning (OPT_Wpragmas, "junk at end of %<#pragma weak%>");
|
|
|
decl = identifier_global_value (name);
|
decl = identifier_global_value (name);
|
if (decl && DECL_P (decl))
|
if (decl && DECL_P (decl))
|
{
|
{
|
apply_pragma_weak (decl, value);
|
apply_pragma_weak (decl, value);
|
if (value)
|
if (value)
|
assemble_alias (decl, value);
|
assemble_alias (decl, value);
|
}
|
}
|
else
|
else
|
pending_weaks = tree_cons (name, value, pending_weaks);
|
pending_weaks = tree_cons (name, value, pending_weaks);
|
}
|
}
|
#else
|
#else
|
void
|
void
|
maybe_apply_pragma_weak (tree ARG_UNUSED (decl))
|
maybe_apply_pragma_weak (tree ARG_UNUSED (decl))
|
{
|
{
|
}
|
}
|
|
|
void
|
void
|
maybe_apply_pending_pragma_weaks (void)
|
maybe_apply_pending_pragma_weaks (void)
|
{
|
{
|
}
|
}
|
#endif /* HANDLE_PRAGMA_WEAK */
|
#endif /* HANDLE_PRAGMA_WEAK */
|
|
|
/* GCC supports two #pragma directives for renaming the external
|
/* GCC supports two #pragma directives for renaming the external
|
symbol associated with a declaration (DECL_ASSEMBLER_NAME), for
|
symbol associated with a declaration (DECL_ASSEMBLER_NAME), for
|
compatibility with the Solaris and Tru64 system headers. GCC also
|
compatibility with the Solaris and Tru64 system headers. GCC also
|
has its own notation for this, __asm__("name") annotations.
|
has its own notation for this, __asm__("name") annotations.
|
|
|
Corner cases of these features and their interaction:
|
Corner cases of these features and their interaction:
|
|
|
1) Both pragmas silently apply only to declarations with external
|
1) Both pragmas silently apply only to declarations with external
|
linkage (that is, TREE_PUBLIC || DECL_EXTERNAL). Asm labels
|
linkage (that is, TREE_PUBLIC || DECL_EXTERNAL). Asm labels
|
do not have this restriction.
|
do not have this restriction.
|
|
|
2) In C++, both #pragmas silently apply only to extern "C" declarations.
|
2) In C++, both #pragmas silently apply only to extern "C" declarations.
|
Asm labels do not have this restriction.
|
Asm labels do not have this restriction.
|
|
|
3) If any of the three ways of changing DECL_ASSEMBLER_NAME is
|
3) If any of the three ways of changing DECL_ASSEMBLER_NAME is
|
applied to a decl whose DECL_ASSEMBLER_NAME is already set, and the
|
applied to a decl whose DECL_ASSEMBLER_NAME is already set, and the
|
new name is different, a warning issues and the name does not change.
|
new name is different, a warning issues and the name does not change.
|
|
|
4) The "source name" for #pragma redefine_extname is the DECL_NAME,
|
4) The "source name" for #pragma redefine_extname is the DECL_NAME,
|
*not* the DECL_ASSEMBLER_NAME.
|
*not* the DECL_ASSEMBLER_NAME.
|
|
|
5) If #pragma extern_prefix is in effect and a declaration occurs
|
5) If #pragma extern_prefix is in effect and a declaration occurs
|
with an __asm__ name, the #pragma extern_prefix is silently
|
with an __asm__ name, the #pragma extern_prefix is silently
|
ignored for that declaration.
|
ignored for that declaration.
|
|
|
6) If #pragma extern_prefix and #pragma redefine_extname apply to
|
6) If #pragma extern_prefix and #pragma redefine_extname apply to
|
the same declaration, whichever triggered first wins, and a warning
|
the same declaration, whichever triggered first wins, and a warning
|
is issued. (We would like to have #pragma redefine_extname always
|
is issued. (We would like to have #pragma redefine_extname always
|
win, but it can appear either before or after the declaration, and
|
win, but it can appear either before or after the declaration, and
|
if it appears afterward, we have no way of knowing whether a modified
|
if it appears afterward, we have no way of knowing whether a modified
|
DECL_ASSEMBLER_NAME is due to #pragma extern_prefix.) */
|
DECL_ASSEMBLER_NAME is due to #pragma extern_prefix.) */
|
|
|
static GTY(()) tree pending_redefine_extname;
|
static GTY(()) tree pending_redefine_extname;
|
|
|
static void handle_pragma_redefine_extname (cpp_reader *);
|
static void handle_pragma_redefine_extname (cpp_reader *);
|
|
|
/* #pragma redefine_extname oldname newname */
|
/* #pragma redefine_extname oldname newname */
|
static void
|
static void
|
handle_pragma_redefine_extname (cpp_reader * ARG_UNUSED (dummy))
|
handle_pragma_redefine_extname (cpp_reader * ARG_UNUSED (dummy))
|
{
|
{
|
tree oldname, newname, decl, x;
|
tree oldname, newname, decl, x;
|
enum cpp_ttype t;
|
enum cpp_ttype t;
|
|
|
if (pragma_lex (&oldname) != CPP_NAME)
|
if (pragma_lex (&oldname) != CPP_NAME)
|
GCC_BAD ("malformed #pragma redefine_extname, ignored");
|
GCC_BAD ("malformed #pragma redefine_extname, ignored");
|
if (pragma_lex (&newname) != CPP_NAME)
|
if (pragma_lex (&newname) != CPP_NAME)
|
GCC_BAD ("malformed #pragma redefine_extname, ignored");
|
GCC_BAD ("malformed #pragma redefine_extname, ignored");
|
t = pragma_lex (&x);
|
t = pragma_lex (&x);
|
if (t != CPP_EOF)
|
if (t != CPP_EOF)
|
warning (OPT_Wpragmas, "junk at end of %<#pragma redefine_extname%>");
|
warning (OPT_Wpragmas, "junk at end of %<#pragma redefine_extname%>");
|
|
|
if (!flag_mudflap && !targetm.handle_pragma_redefine_extname)
|
if (!flag_mudflap && !targetm.handle_pragma_redefine_extname)
|
{
|
{
|
if (warn_unknown_pragmas > in_system_header)
|
if (warn_unknown_pragmas > in_system_header)
|
warning (OPT_Wunknown_pragmas,
|
warning (OPT_Wunknown_pragmas,
|
"#pragma redefine_extname not supported on this target");
|
"#pragma redefine_extname not supported on this target");
|
return;
|
return;
|
}
|
}
|
|
|
decl = identifier_global_value (oldname);
|
decl = identifier_global_value (oldname);
|
if (decl
|
if (decl
|
&& (TREE_PUBLIC (decl) || DECL_EXTERNAL (decl))
|
&& (TREE_PUBLIC (decl) || DECL_EXTERNAL (decl))
|
&& (TREE_CODE (decl) == FUNCTION_DECL
|
&& (TREE_CODE (decl) == FUNCTION_DECL
|
|| TREE_CODE (decl) == VAR_DECL)
|
|| TREE_CODE (decl) == VAR_DECL)
|
&& has_c_linkage (decl))
|
&& has_c_linkage (decl))
|
{
|
{
|
if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
{
|
{
|
const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
name = targetm.strip_name_encoding (name);
|
name = targetm.strip_name_encoding (name);
|
|
|
if (strcmp (name, IDENTIFIER_POINTER (newname)))
|
if (strcmp (name, IDENTIFIER_POINTER (newname)))
|
warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
"conflict with previous rename");
|
"conflict with previous rename");
|
}
|
}
|
else
|
else
|
change_decl_assembler_name (decl, newname);
|
change_decl_assembler_name (decl, newname);
|
}
|
}
|
else
|
else
|
/* We have to add this to the rename list even if there's already
|
/* We have to add this to the rename list even if there's already
|
a global value that doesn't meet the above criteria, because in
|
a global value that doesn't meet the above criteria, because in
|
C++ "struct foo {...};" puts "foo" in the current namespace but
|
C++ "struct foo {...};" puts "foo" in the current namespace but
|
does *not* conflict with a subsequent declaration of a function
|
does *not* conflict with a subsequent declaration of a function
|
or variable foo. See g++.dg/other/pragma-re-2.C. */
|
or variable foo. See g++.dg/other/pragma-re-2.C. */
|
add_to_renaming_pragma_list (oldname, newname);
|
add_to_renaming_pragma_list (oldname, newname);
|
}
|
}
|
|
|
/* This is called from here and from ia64.c. */
|
/* This is called from here and from ia64.c. */
|
void
|
void
|
add_to_renaming_pragma_list (tree oldname, tree newname)
|
add_to_renaming_pragma_list (tree oldname, tree newname)
|
{
|
{
|
tree previous = purpose_member (oldname, pending_redefine_extname);
|
tree previous = purpose_member (oldname, pending_redefine_extname);
|
if (previous)
|
if (previous)
|
{
|
{
|
if (TREE_VALUE (previous) != newname)
|
if (TREE_VALUE (previous) != newname)
|
warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
"conflict with previous #pragma redefine_extname");
|
"conflict with previous #pragma redefine_extname");
|
return;
|
return;
|
}
|
}
|
|
|
pending_redefine_extname
|
pending_redefine_extname
|
= tree_cons (oldname, newname, pending_redefine_extname);
|
= tree_cons (oldname, newname, pending_redefine_extname);
|
}
|
}
|
|
|
static GTY(()) tree pragma_extern_prefix;
|
static GTY(()) tree pragma_extern_prefix;
|
|
|
/* #pragma extern_prefix "prefix" */
|
/* #pragma extern_prefix "prefix" */
|
static void
|
static void
|
handle_pragma_extern_prefix (cpp_reader * ARG_UNUSED (dummy))
|
handle_pragma_extern_prefix (cpp_reader * ARG_UNUSED (dummy))
|
{
|
{
|
tree prefix, x;
|
tree prefix, x;
|
enum cpp_ttype t;
|
enum cpp_ttype t;
|
|
|
if (pragma_lex (&prefix) != CPP_STRING)
|
if (pragma_lex (&prefix) != CPP_STRING)
|
GCC_BAD ("malformed #pragma extern_prefix, ignored");
|
GCC_BAD ("malformed #pragma extern_prefix, ignored");
|
t = pragma_lex (&x);
|
t = pragma_lex (&x);
|
if (t != CPP_EOF)
|
if (t != CPP_EOF)
|
warning (OPT_Wpragmas, "junk at end of %<#pragma extern_prefix%>");
|
warning (OPT_Wpragmas, "junk at end of %<#pragma extern_prefix%>");
|
|
|
if (targetm.handle_pragma_extern_prefix)
|
if (targetm.handle_pragma_extern_prefix)
|
/* Note that the length includes the null terminator. */
|
/* Note that the length includes the null terminator. */
|
pragma_extern_prefix = (TREE_STRING_LENGTH (prefix) > 1 ? prefix : NULL);
|
pragma_extern_prefix = (TREE_STRING_LENGTH (prefix) > 1 ? prefix : NULL);
|
else if (warn_unknown_pragmas > in_system_header)
|
else if (warn_unknown_pragmas > in_system_header)
|
warning (OPT_Wunknown_pragmas,
|
warning (OPT_Wunknown_pragmas,
|
"#pragma extern_prefix not supported on this target");
|
"#pragma extern_prefix not supported on this target");
|
}
|
}
|
|
|
/* Hook from the front ends to apply the results of one of the preceding
|
/* Hook from the front ends to apply the results of one of the preceding
|
pragmas that rename variables. */
|
pragmas that rename variables. */
|
|
|
tree
|
tree
|
maybe_apply_renaming_pragma (tree decl, tree asmname)
|
maybe_apply_renaming_pragma (tree decl, tree asmname)
|
{
|
{
|
tree *p, t;
|
tree *p, t;
|
|
|
/* The renaming pragmas are only applied to declarations with
|
/* The renaming pragmas are only applied to declarations with
|
external linkage. */
|
external linkage. */
|
if ((TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
|
if ((TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
|
|| (!TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl))
|
|| (!TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl))
|
|| !has_c_linkage (decl))
|
|| !has_c_linkage (decl))
|
return asmname;
|
return asmname;
|
|
|
/* If the DECL_ASSEMBLER_NAME is already set, it does not change,
|
/* If the DECL_ASSEMBLER_NAME is already set, it does not change,
|
but we may warn about a rename that conflicts. */
|
but we may warn about a rename that conflicts. */
|
if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
{
|
{
|
const char *oldname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
const char *oldname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
oldname = targetm.strip_name_encoding (oldname);
|
oldname = targetm.strip_name_encoding (oldname);
|
|
|
if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldname))
|
if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldname))
|
warning (OPT_Wpragmas, "asm declaration ignored due to "
|
warning (OPT_Wpragmas, "asm declaration ignored due to "
|
"conflict with previous rename");
|
"conflict with previous rename");
|
|
|
/* Take any pending redefine_extname off the list. */
|
/* Take any pending redefine_extname off the list. */
|
for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
|
for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
|
if (DECL_NAME (decl) == TREE_PURPOSE (t))
|
if (DECL_NAME (decl) == TREE_PURPOSE (t))
|
{
|
{
|
/* Only warn if there is a conflict. */
|
/* Only warn if there is a conflict. */
|
if (strcmp (IDENTIFIER_POINTER (TREE_VALUE (t)), oldname))
|
if (strcmp (IDENTIFIER_POINTER (TREE_VALUE (t)), oldname))
|
warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
"conflict with previous rename");
|
"conflict with previous rename");
|
|
|
*p = TREE_CHAIN (t);
|
*p = TREE_CHAIN (t);
|
break;
|
break;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Find out if we have a pending #pragma redefine_extname. */
|
/* Find out if we have a pending #pragma redefine_extname. */
|
for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
|
for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
|
if (DECL_NAME (decl) == TREE_PURPOSE (t))
|
if (DECL_NAME (decl) == TREE_PURPOSE (t))
|
{
|
{
|
tree newname = TREE_VALUE (t);
|
tree newname = TREE_VALUE (t);
|
*p = TREE_CHAIN (t);
|
*p = TREE_CHAIN (t);
|
|
|
/* If we already have an asmname, #pragma redefine_extname is
|
/* If we already have an asmname, #pragma redefine_extname is
|
ignored (with a warning if it conflicts). */
|
ignored (with a warning if it conflicts). */
|
if (asmname)
|
if (asmname)
|
{
|
{
|
if (strcmp (TREE_STRING_POINTER (asmname),
|
if (strcmp (TREE_STRING_POINTER (asmname),
|
IDENTIFIER_POINTER (newname)) != 0)
|
IDENTIFIER_POINTER (newname)) != 0)
|
warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
"conflict with __asm__ declaration");
|
"conflict with __asm__ declaration");
|
return asmname;
|
return asmname;
|
}
|
}
|
|
|
/* Otherwise we use what we've got; #pragma extern_prefix is
|
/* Otherwise we use what we've got; #pragma extern_prefix is
|
silently ignored. */
|
silently ignored. */
|
return build_string (IDENTIFIER_LENGTH (newname),
|
return build_string (IDENTIFIER_LENGTH (newname),
|
IDENTIFIER_POINTER (newname));
|
IDENTIFIER_POINTER (newname));
|
}
|
}
|
|
|
/* If we've got an asmname, #pragma extern_prefix is silently ignored. */
|
/* If we've got an asmname, #pragma extern_prefix is silently ignored. */
|
if (asmname)
|
if (asmname)
|
return asmname;
|
return asmname;
|
|
|
/* If #pragma extern_prefix is in effect, apply it. */
|
/* If #pragma extern_prefix is in effect, apply it. */
|
if (pragma_extern_prefix)
|
if (pragma_extern_prefix)
|
{
|
{
|
const char *prefix = TREE_STRING_POINTER (pragma_extern_prefix);
|
const char *prefix = TREE_STRING_POINTER (pragma_extern_prefix);
|
size_t plen = TREE_STRING_LENGTH (pragma_extern_prefix) - 1;
|
size_t plen = TREE_STRING_LENGTH (pragma_extern_prefix) - 1;
|
|
|
const char *id = IDENTIFIER_POINTER (DECL_NAME (decl));
|
const char *id = IDENTIFIER_POINTER (DECL_NAME (decl));
|
size_t ilen = IDENTIFIER_LENGTH (DECL_NAME (decl));
|
size_t ilen = IDENTIFIER_LENGTH (DECL_NAME (decl));
|
|
|
char *newname = (char *) alloca (plen + ilen + 1);
|
char *newname = (char *) alloca (plen + ilen + 1);
|
|
|
memcpy (newname, prefix, plen);
|
memcpy (newname, prefix, plen);
|
memcpy (newname + plen, id, ilen + 1);
|
memcpy (newname + plen, id, ilen + 1);
|
|
|
return build_string (plen + ilen, newname);
|
return build_string (plen + ilen, newname);
|
}
|
}
|
|
|
/* Nada. */
|
/* Nada. */
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
#ifdef HANDLE_PRAGMA_VISIBILITY
|
#ifdef HANDLE_PRAGMA_VISIBILITY
|
static void handle_pragma_visibility (cpp_reader *);
|
static void handle_pragma_visibility (cpp_reader *);
|
|
|
typedef enum symbol_visibility visibility;
|
typedef enum symbol_visibility visibility;
|
DEF_VEC_I (visibility);
|
DEF_VEC_I (visibility);
|
DEF_VEC_ALLOC_I (visibility, heap);
|
DEF_VEC_ALLOC_I (visibility, heap);
|
static VEC (visibility, heap) *visstack;
|
static VEC (visibility, heap) *visstack;
|
|
|
/* Push the visibility indicated by STR onto the top of the #pragma
|
/* Push the visibility indicated by STR onto the top of the #pragma
|
visibility stack. */
|
visibility stack. */
|
|
|
void
|
void
|
push_visibility (const char *str)
|
push_visibility (const char *str)
|
{
|
{
|
VEC_safe_push (visibility, heap, visstack,
|
VEC_safe_push (visibility, heap, visstack,
|
default_visibility);
|
default_visibility);
|
if (!strcmp (str, "default"))
|
if (!strcmp (str, "default"))
|
default_visibility = VISIBILITY_DEFAULT;
|
default_visibility = VISIBILITY_DEFAULT;
|
else if (!strcmp (str, "internal"))
|
else if (!strcmp (str, "internal"))
|
default_visibility = VISIBILITY_INTERNAL;
|
default_visibility = VISIBILITY_INTERNAL;
|
else if (!strcmp (str, "hidden"))
|
else if (!strcmp (str, "hidden"))
|
default_visibility = VISIBILITY_HIDDEN;
|
default_visibility = VISIBILITY_HIDDEN;
|
else if (!strcmp (str, "protected"))
|
else if (!strcmp (str, "protected"))
|
default_visibility = VISIBILITY_PROTECTED;
|
default_visibility = VISIBILITY_PROTECTED;
|
else
|
else
|
GCC_BAD ("#pragma GCC visibility push() must specify default, internal, hidden or protected");
|
GCC_BAD ("#pragma GCC visibility push() must specify default, internal, hidden or protected");
|
visibility_options.inpragma = 1;
|
visibility_options.inpragma = 1;
|
}
|
}
|
|
|
/* Pop a level of the #pragma visibility stack. */
|
/* Pop a level of the #pragma visibility stack. */
|
|
|
void
|
void
|
pop_visibility (void)
|
pop_visibility (void)
|
{
|
{
|
default_visibility = VEC_pop (visibility, visstack);
|
default_visibility = VEC_pop (visibility, visstack);
|
visibility_options.inpragma
|
visibility_options.inpragma
|
= VEC_length (visibility, visstack) != 0;
|
= VEC_length (visibility, visstack) != 0;
|
}
|
}
|
|
|
/* Sets the default visibility for symbols to something other than that
|
/* Sets the default visibility for symbols to something other than that
|
specified on the command line. */
|
specified on the command line. */
|
|
|
static void
|
static void
|
handle_pragma_visibility (cpp_reader *dummy ATTRIBUTE_UNUSED)
|
handle_pragma_visibility (cpp_reader *dummy ATTRIBUTE_UNUSED)
|
{
|
{
|
/* Form is #pragma GCC visibility push(hidden)|pop */
|
/* Form is #pragma GCC visibility push(hidden)|pop */
|
tree x;
|
tree x;
|
enum cpp_ttype token;
|
enum cpp_ttype token;
|
enum { bad, push, pop } action = bad;
|
enum { bad, push, pop } action = bad;
|
|
|
token = pragma_lex (&x);
|
token = pragma_lex (&x);
|
if (token == CPP_NAME)
|
if (token == CPP_NAME)
|
{
|
{
|
const char *op = IDENTIFIER_POINTER (x);
|
const char *op = IDENTIFIER_POINTER (x);
|
if (!strcmp (op, "push"))
|
if (!strcmp (op, "push"))
|
action = push;
|
action = push;
|
else if (!strcmp (op, "pop"))
|
else if (!strcmp (op, "pop"))
|
action = pop;
|
action = pop;
|
}
|
}
|
if (bad == action)
|
if (bad == action)
|
GCC_BAD ("#pragma GCC visibility must be followed by push or pop");
|
GCC_BAD ("#pragma GCC visibility must be followed by push or pop");
|
else
|
else
|
{
|
{
|
if (pop == action)
|
if (pop == action)
|
{
|
{
|
if (!VEC_length (visibility, visstack))
|
if (!VEC_length (visibility, visstack))
|
GCC_BAD ("no matching push for %<#pragma GCC visibility pop%>");
|
GCC_BAD ("no matching push for %<#pragma GCC visibility pop%>");
|
else
|
else
|
pop_visibility ();
|
pop_visibility ();
|
}
|
}
|
else
|
else
|
{
|
{
|
if (pragma_lex (&x) != CPP_OPEN_PAREN)
|
if (pragma_lex (&x) != CPP_OPEN_PAREN)
|
GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
token = pragma_lex (&x);
|
token = pragma_lex (&x);
|
if (token != CPP_NAME)
|
if (token != CPP_NAME)
|
GCC_BAD ("malformed #pragma GCC visibility push");
|
GCC_BAD ("malformed #pragma GCC visibility push");
|
else
|
else
|
push_visibility (IDENTIFIER_POINTER (x));
|
push_visibility (IDENTIFIER_POINTER (x));
|
if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
}
|
}
|
}
|
}
|
if (pragma_lex (&x) != CPP_EOF)
|
if (pragma_lex (&x) != CPP_EOF)
|
warning (OPT_Wpragmas, "junk at end of %<#pragma GCC visibility%>");
|
warning (OPT_Wpragmas, "junk at end of %<#pragma GCC visibility%>");
|
}
|
}
|
|
|
#endif
|
#endif
|
|
|
static void
|
static void
|
handle_pragma_diagnostic(cpp_reader *ARG_UNUSED(dummy))
|
handle_pragma_diagnostic(cpp_reader *ARG_UNUSED(dummy))
|
{
|
{
|
const char *kind_string, *option_string;
|
const char *kind_string, *option_string;
|
unsigned int option_index;
|
unsigned int option_index;
|
enum cpp_ttype token;
|
enum cpp_ttype token;
|
diagnostic_t kind;
|
diagnostic_t kind;
|
tree x;
|
tree x;
|
|
|
if (cfun)
|
if (cfun)
|
{
|
{
|
error ("#pragma GCC diagnostic not allowed inside functions");
|
error ("#pragma GCC diagnostic not allowed inside functions");
|
return;
|
return;
|
}
|
}
|
|
|
token = pragma_lex (&x);
|
token = pragma_lex (&x);
|
if (token != CPP_NAME)
|
if (token != CPP_NAME)
|
GCC_BAD ("missing [error|warning|ignored] after %<#pragma GCC diagnostic%>");
|
GCC_BAD ("missing [error|warning|ignored] after %<#pragma GCC diagnostic%>");
|
kind_string = IDENTIFIER_POINTER (x);
|
kind_string = IDENTIFIER_POINTER (x);
|
if (strcmp (kind_string, "error") == 0)
|
if (strcmp (kind_string, "error") == 0)
|
kind = DK_ERROR;
|
kind = DK_ERROR;
|
else if (strcmp (kind_string, "warning") == 0)
|
else if (strcmp (kind_string, "warning") == 0)
|
kind = DK_WARNING;
|
kind = DK_WARNING;
|
else if (strcmp (kind_string, "ignored") == 0)
|
else if (strcmp (kind_string, "ignored") == 0)
|
kind = DK_IGNORED;
|
kind = DK_IGNORED;
|
else
|
else
|
GCC_BAD ("expected [error|warning|ignored] after %<#pragma GCC diagnostic%>");
|
GCC_BAD ("expected [error|warning|ignored] after %<#pragma GCC diagnostic%>");
|
|
|
token = pragma_lex (&x);
|
token = pragma_lex (&x);
|
if (token != CPP_STRING)
|
if (token != CPP_STRING)
|
GCC_BAD ("missing option after %<#pragma GCC diagnostic%> kind");
|
GCC_BAD ("missing option after %<#pragma GCC diagnostic%> kind");
|
option_string = TREE_STRING_POINTER (x);
|
option_string = TREE_STRING_POINTER (x);
|
for (option_index = 0; option_index < cl_options_count; option_index++)
|
for (option_index = 0; option_index < cl_options_count; option_index++)
|
if (strcmp (cl_options[option_index].opt_text, option_string) == 0)
|
if (strcmp (cl_options[option_index].opt_text, option_string) == 0)
|
{
|
{
|
/* This overrides -Werror, for example. */
|
/* This overrides -Werror, for example. */
|
diagnostic_classify_diagnostic (global_dc, option_index, kind);
|
diagnostic_classify_diagnostic (global_dc, option_index, kind);
|
/* This makes sure the option is enabled, like -Wfoo would do. */
|
/* This makes sure the option is enabled, like -Wfoo would do. */
|
if (cl_options[option_index].var_type == CLVC_BOOLEAN
|
if (cl_options[option_index].var_type == CLVC_BOOLEAN
|
&& cl_options[option_index].flag_var
|
&& cl_options[option_index].flag_var
|
&& kind != DK_IGNORED)
|
&& kind != DK_IGNORED)
|
*(int *) cl_options[option_index].flag_var = 1;
|
*(int *) cl_options[option_index].flag_var = 1;
|
return;
|
return;
|
}
|
}
|
GCC_BAD ("unknown option after %<#pragma GCC diagnostic%> kind");
|
GCC_BAD ("unknown option after %<#pragma GCC diagnostic%> kind");
|
}
|
}
|
|
|
/* A vector of registered pragma callbacks. */
|
/* A vector of registered pragma callbacks. */
|
|
|
DEF_VEC_O (pragma_handler);
|
DEF_VEC_O (pragma_handler);
|
DEF_VEC_ALLOC_O (pragma_handler, heap);
|
DEF_VEC_ALLOC_O (pragma_handler, heap);
|
|
|
static VEC(pragma_handler, heap) *registered_pragmas;
|
static VEC(pragma_handler, heap) *registered_pragmas;
|
|
|
/* Front-end wrappers for pragma registration to avoid dragging
|
/* Front-end wrappers for pragma registration to avoid dragging
|
cpplib.h in almost everywhere. */
|
cpplib.h in almost everywhere. */
|
|
|
static void
|
static void
|
c_register_pragma_1 (const char *space, const char *name,
|
c_register_pragma_1 (const char *space, const char *name,
|
pragma_handler handler, bool allow_expansion)
|
pragma_handler handler, bool allow_expansion)
|
{
|
{
|
unsigned id;
|
unsigned id;
|
|
|
VEC_safe_push (pragma_handler, heap, registered_pragmas, &handler);
|
VEC_safe_push (pragma_handler, heap, registered_pragmas, &handler);
|
id = VEC_length (pragma_handler, registered_pragmas);
|
id = VEC_length (pragma_handler, registered_pragmas);
|
id += PRAGMA_FIRST_EXTERNAL - 1;
|
id += PRAGMA_FIRST_EXTERNAL - 1;
|
|
|
/* The C++ front end allocates 6 bits in cp_token; the C front end
|
/* The C++ front end allocates 6 bits in cp_token; the C front end
|
allocates 7 bits in c_token. At present this is sufficient. */
|
allocates 7 bits in c_token. At present this is sufficient. */
|
gcc_assert (id < 64);
|
gcc_assert (id < 64);
|
|
|
cpp_register_deferred_pragma (parse_in, space, name, id,
|
cpp_register_deferred_pragma (parse_in, space, name, id,
|
allow_expansion, false);
|
allow_expansion, false);
|
}
|
}
|
|
|
void
|
void
|
c_register_pragma (const char *space, const char *name, pragma_handler handler)
|
c_register_pragma (const char *space, const char *name, pragma_handler handler)
|
{
|
{
|
c_register_pragma_1 (space, name, handler, false);
|
c_register_pragma_1 (space, name, handler, false);
|
}
|
}
|
|
|
void
|
void
|
c_register_pragma_with_expansion (const char *space, const char *name,
|
c_register_pragma_with_expansion (const char *space, const char *name,
|
pragma_handler handler)
|
pragma_handler handler)
|
{
|
{
|
c_register_pragma_1 (space, name, handler, true);
|
c_register_pragma_1 (space, name, handler, true);
|
}
|
}
|
|
|
void
|
void
|
c_invoke_pragma_handler (unsigned int id)
|
c_invoke_pragma_handler (unsigned int id)
|
{
|
{
|
pragma_handler handler;
|
pragma_handler handler;
|
|
|
id -= PRAGMA_FIRST_EXTERNAL;
|
id -= PRAGMA_FIRST_EXTERNAL;
|
handler = *VEC_index (pragma_handler, registered_pragmas, id);
|
handler = *VEC_index (pragma_handler, registered_pragmas, id);
|
|
|
handler (parse_in);
|
handler (parse_in);
|
}
|
}
|
|
|
/* Set up front-end pragmas. */
|
/* Set up front-end pragmas. */
|
void
|
void
|
init_pragma (void)
|
init_pragma (void)
|
{
|
{
|
if (flag_openmp && !flag_preprocess_only)
|
if (flag_openmp && !flag_preprocess_only)
|
{
|
{
|
struct omp_pragma_def { const char *name; unsigned int id; };
|
struct omp_pragma_def { const char *name; unsigned int id; };
|
static const struct omp_pragma_def omp_pragmas[] = {
|
static const struct omp_pragma_def omp_pragmas[] = {
|
{ "atomic", PRAGMA_OMP_ATOMIC },
|
{ "atomic", PRAGMA_OMP_ATOMIC },
|
{ "barrier", PRAGMA_OMP_BARRIER },
|
{ "barrier", PRAGMA_OMP_BARRIER },
|
{ "critical", PRAGMA_OMP_CRITICAL },
|
{ "critical", PRAGMA_OMP_CRITICAL },
|
{ "flush", PRAGMA_OMP_FLUSH },
|
{ "flush", PRAGMA_OMP_FLUSH },
|
{ "for", PRAGMA_OMP_FOR },
|
{ "for", PRAGMA_OMP_FOR },
|
{ "master", PRAGMA_OMP_MASTER },
|
{ "master", PRAGMA_OMP_MASTER },
|
{ "ordered", PRAGMA_OMP_ORDERED },
|
{ "ordered", PRAGMA_OMP_ORDERED },
|
{ "parallel", PRAGMA_OMP_PARALLEL },
|
{ "parallel", PRAGMA_OMP_PARALLEL },
|
{ "section", PRAGMA_OMP_SECTION },
|
{ "section", PRAGMA_OMP_SECTION },
|
{ "sections", PRAGMA_OMP_SECTIONS },
|
{ "sections", PRAGMA_OMP_SECTIONS },
|
{ "single", PRAGMA_OMP_SINGLE },
|
{ "single", PRAGMA_OMP_SINGLE },
|
{ "threadprivate", PRAGMA_OMP_THREADPRIVATE }
|
{ "threadprivate", PRAGMA_OMP_THREADPRIVATE }
|
};
|
};
|
|
|
const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
|
const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
|
int i;
|
int i;
|
|
|
for (i = 0; i < n_omp_pragmas; ++i)
|
for (i = 0; i < n_omp_pragmas; ++i)
|
cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas[i].name,
|
cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas[i].name,
|
omp_pragmas[i].id, true, true);
|
omp_pragmas[i].id, true, true);
|
}
|
}
|
|
|
cpp_register_deferred_pragma (parse_in, "GCC", "pch_preprocess",
|
cpp_register_deferred_pragma (parse_in, "GCC", "pch_preprocess",
|
PRAGMA_GCC_PCH_PREPROCESS, false, false);
|
PRAGMA_GCC_PCH_PREPROCESS, false, false);
|
|
|
#ifdef HANDLE_PRAGMA_PACK
|
#ifdef HANDLE_PRAGMA_PACK
|
#ifdef HANDLE_PRAGMA_PACK_WITH_EXPANSION
|
#ifdef HANDLE_PRAGMA_PACK_WITH_EXPANSION
|
c_register_pragma_with_expansion (0, "pack", handle_pragma_pack);
|
c_register_pragma_with_expansion (0, "pack", handle_pragma_pack);
|
#else
|
#else
|
c_register_pragma (0, "pack", handle_pragma_pack);
|
c_register_pragma (0, "pack", handle_pragma_pack);
|
#endif
|
#endif
|
#endif
|
#endif
|
#ifdef HANDLE_PRAGMA_WEAK
|
#ifdef HANDLE_PRAGMA_WEAK
|
c_register_pragma (0, "weak", handle_pragma_weak);
|
c_register_pragma (0, "weak", handle_pragma_weak);
|
#endif
|
#endif
|
#ifdef HANDLE_PRAGMA_VISIBILITY
|
#ifdef HANDLE_PRAGMA_VISIBILITY
|
c_register_pragma ("GCC", "visibility", handle_pragma_visibility);
|
c_register_pragma ("GCC", "visibility", handle_pragma_visibility);
|
#endif
|
#endif
|
|
|
c_register_pragma ("GCC", "diagnostic", handle_pragma_diagnostic);
|
c_register_pragma ("GCC", "diagnostic", handle_pragma_diagnostic);
|
|
|
c_register_pragma_with_expansion (0, "redefine_extname", handle_pragma_redefine_extname);
|
c_register_pragma_with_expansion (0, "redefine_extname", handle_pragma_redefine_extname);
|
c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
|
c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
|
|
|
#ifdef REGISTER_TARGET_PRAGMAS
|
#ifdef REGISTER_TARGET_PRAGMAS
|
REGISTER_TARGET_PRAGMAS ();
|
REGISTER_TARGET_PRAGMAS ();
|
#endif
|
#endif
|
}
|
}
|
|
|
#include "gt-c-pragma.h"
|
#include "gt-c-pragma.h"
|
|
|
