/* Mudflap: narrow-pointer bounds-checking by tree rewriting.
- Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
Contributed by Frank Ch. Eigler <fche@redhat.com>
and Graydon Hoare <graydon@redhat.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, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
/* Internal function decls */
+
+/* Options. */
+#define flag_mudflap_threads (flag_mudflap == 2)
+
/* Helpers. */
static tree mf_build_string (const char *string);
static tree mf_varname_tree (tree);
TREE_PUBLIC (decl) = 1;
DECL_EXTERNAL (decl) = 1;
lang_hooks.decls.pushdecl (decl);
+ /* The decl was declared by the compiler. */
+ DECL_ARTIFICIAL (decl) = 1;
+ /* And we don't want debug info for it. */
+ DECL_IGNORED_P (decl) = 1;
return decl;
}
return struct_type;
}
-#define build_function_type_0(rtype) \
+#define build_function_type_0(rtype) \
build_function_type (rtype, void_list_node)
-#define build_function_type_1(rtype, arg1) \
+#define build_function_type_1(rtype, arg1) \
build_function_type (rtype, tree_cons (0, arg1, void_list_node))
#define build_function_type_3(rtype, arg1, arg2, arg3) \
- build_function_type (rtype, tree_cons (0, arg1, tree_cons (0, arg2, \
- tree_cons (0, arg3, void_list_node))))
+ build_function_type (rtype, \
+ tree_cons (0, arg1, \
+ tree_cons (0, arg2, \
+ tree_cons (0, arg3, \
+ void_list_node))))
#define build_function_type_4(rtype, arg1, arg2, arg3, arg4) \
- build_function_type (rtype, tree_cons (0, arg1, tree_cons (0, arg2, \
- tree_cons (0, arg3, tree_cons (0, arg4, \
- void_list_node)))))
+ build_function_type (rtype, \
+ tree_cons (0, arg1, \
+ tree_cons (0, arg2, \
+ tree_cons (0, arg3, \
+ tree_cons (0, arg4, \
+ void_list_node)))))
/* Initialize the global tree nodes that correspond to mf-runtime.h
declarations. */
/* Build initialization nodes for the cache vars. We just load the
globals into the cache variables. */
- t = build2 (MODIFY_EXPR, TREE_TYPE (mf_cache_shift_decl_l),
- mf_cache_shift_decl_l, mf_cache_shift_decl);
+ t = build_gimple_modify_stmt (mf_cache_shift_decl_l, mf_cache_shift_decl);
SET_EXPR_LOCATION (t, DECL_SOURCE_LOCATION (current_function_decl));
gimplify_to_stmt_list (&t);
shift_init_stmts = t;
- t = build2 (MODIFY_EXPR, TREE_TYPE (mf_cache_mask_decl_l),
- mf_cache_mask_decl_l, mf_cache_mask_decl);
+ t = build_gimple_modify_stmt (mf_cache_mask_decl_l, mf_cache_mask_decl);
SET_EXPR_LOCATION (t, DECL_SOURCE_LOCATION (current_function_decl));
gimplify_to_stmt_list (&t);
mask_init_stmts = t;
mf_limit = create_tmp_var (mf_uintptr_type, "__mf_limit");
/* Build: __mf_base = (uintptr_t) <base address expression>. */
- t = build2 (MODIFY_EXPR, void_type_node, mf_base,
- convert (mf_uintptr_type, unshare_expr (base)));
+ t = build_gimple_modify_stmt (mf_base,
+ fold_convert (mf_uintptr_type,
+ unshare_expr (base)));
SET_EXPR_LOCUS (t, locus);
gimplify_to_stmt_list (&t);
head = tsi_start (t);
tsi = tsi_last (t);
/* Build: __mf_limit = (uintptr_t) <limit address expression>. */
- t = build2 (MODIFY_EXPR, void_type_node, mf_limit,
- convert (mf_uintptr_type, unshare_expr (limit)));
+ t = build_gimple_modify_stmt (mf_limit,
+ fold_convert (mf_uintptr_type,
+ unshare_expr (limit)));
SET_EXPR_LOCUS (t, locus);
gimplify_to_stmt_list (&t);
tsi_link_after (&tsi, t, TSI_CONTINUE_LINKING);
/* Build: __mf_elem = &__mf_lookup_cache [(__mf_base >> __mf_shift)
& __mf_mask]. */
t = build2 (RSHIFT_EXPR, mf_uintptr_type, mf_base,
- (flag_mudflap_threads ? mf_cache_shift_decl : mf_cache_shift_decl_l));
+ flag_mudflap_threads ? mf_cache_shift_decl
+ : mf_cache_shift_decl_l);
t = build2 (BIT_AND_EXPR, mf_uintptr_type, t,
- (flag_mudflap_threads ? mf_cache_mask_decl : mf_cache_mask_decl_l));
+ flag_mudflap_threads ? mf_cache_mask_decl
+ : mf_cache_mask_decl_l);
t = build4 (ARRAY_REF,
TREE_TYPE (TREE_TYPE (mf_cache_array_decl)),
mf_cache_array_decl, t, NULL_TREE, NULL_TREE);
t = build1 (ADDR_EXPR, mf_cache_structptr_type, t);
- t = build2 (MODIFY_EXPR, void_type_node, mf_elem, t);
+ t = build_gimple_modify_stmt (mf_elem, t);
SET_EXPR_LOCUS (t, locus);
gimplify_to_stmt_list (&t);
tsi_link_after (&tsi, t, TSI_CONTINUE_LINKING);
can use as the condition for the conditional jump. */
t = build2 (TRUTH_OR_EXPR, boolean_type_node, t, u);
cond = create_tmp_var (boolean_type_node, "__mf_unlikely_cond");
- t = build2 (MODIFY_EXPR, boolean_type_node, cond, t);
+ t = build_gimple_modify_stmt (cond, t);
gimplify_to_stmt_list (&t);
tsi_link_after (&tsi, t, TSI_CONTINUE_LINKING);
/* Build the conditional jump. 'cond' is just a temporary so we can
simply build a void COND_EXPR. We do need labels in both arms though. */
- t = build3 (COND_EXPR, void_type_node, cond,
- build1 (GOTO_EXPR, void_type_node, tree_block_label (then_bb)),
- build1 (GOTO_EXPR, void_type_node, tree_block_label (join_bb)));
+ t = build3 (COND_EXPR, void_type_node, cond, NULL_TREE, NULL_TREE);
SET_EXPR_LOCUS (t, locus);
tsi_link_after (&tsi, t, TSI_CONTINUE_LINKING);
refresh *_l vars.
This is the body of the conditional. */
-
- u = tree_cons (NULL_TREE,
- mf_file_function_line_tree (locus == NULL ? UNKNOWN_LOCATION
- : *locus),
- NULL_TREE);
- u = tree_cons (NULL_TREE, dirflag, u);
+
+ u = mf_file_function_line_tree (locus == NULL ? UNKNOWN_LOCATION : *locus);
/* NB: we pass the overall [base..limit] range to mf_check. */
- u = tree_cons (NULL_TREE,
- fold_build2 (PLUS_EXPR, integer_type_node,
- fold_build2 (MINUS_EXPR, mf_uintptr_type, mf_limit, mf_base),
- integer_one_node),
- u);
- u = tree_cons (NULL_TREE, mf_base, u);
- t = build_function_call_expr (mf_check_fndecl, u);
+ v = fold_build2 (PLUS_EXPR, integer_type_node,
+ fold_build2 (MINUS_EXPR, mf_uintptr_type, mf_limit, mf_base),
+ integer_one_node);
+ t = build_call_expr (mf_check_fndecl, 4, mf_base, v, dirflag, u);
gimplify_to_stmt_list (&t);
head = tsi_start (t);
tsi = tsi_last (t);
if (! flag_mudflap_threads)
{
- t = build2 (MODIFY_EXPR, void_type_node,
- mf_cache_shift_decl_l, mf_cache_shift_decl);
+ t = build_gimple_modify_stmt (mf_cache_shift_decl_l,
+ mf_cache_shift_decl);
tsi_link_after (&tsi, t, TSI_CONTINUE_LINKING);
- t = build2 (MODIFY_EXPR, void_type_node,
- mf_cache_mask_decl_l, mf_cache_mask_decl);
+ t = build_gimple_modify_stmt (mf_cache_mask_decl_l,
+ mf_cache_mask_decl);
tsi_link_after (&tsi, t, TSI_CONTINUE_LINKING);
}
bsi_insert_after (&bsi, tsi_stmt (tsi), BSI_CONTINUE_LINKING);
*instr_bsi = bsi_start (join_bb);
- bsi_next (instr_bsi);
}
/* The decl must have its address taken. In the case of
arrays, this flag is also set if the indexes are not
compile-time known valid constants. */
- && TREE_ADDRESSABLE (decl) /* XXX: not sufficient: return-by-value structs! */
+ /* XXX: not sufficient: return-by-value structs! */
+ && TREE_ADDRESSABLE (decl)
/* The type of the variable must be complete. */
&& COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (decl))
/* The decl hasn't been decomposed somehow. */
while (1)
{
if (bitfield_ref_p && elt == NULL_TREE
- && (TREE_CODE (var) == ARRAY_REF || TREE_CODE (var) == COMPONENT_REF))
+ && (TREE_CODE (var) == ARRAY_REF
+ || TREE_CODE (var) == COMPONENT_REF))
elt = var;
if (TREE_CODE (var) == ARRAY_REF)
return;
else
{
- base = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (var)), var);
+ base = build1 (ADDR_EXPR,
+ build_pointer_type (TREE_TYPE (var)), var);
break;
}
}
size = DECL_SIZE_UNIT (field);
if (elt)
- elt = build1 (ADDR_EXPR, build_pointer_type TREE_TYPE (elt), elt);
+ elt = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (elt)),
+ elt);
addr = fold_convert (ptr_type_node, elt ? elt : base);
- addr = fold_build2 (PLUS_EXPR, ptr_type_node,
- addr, fold_convert (ptr_type_node,
+ addr = fold_build2 (POINTER_PLUS_EXPR, ptr_type_node,
+ addr, fold_convert (sizetype,
byte_position (field)));
}
else
case INDIRECT_REF:
addr = TREE_OPERAND (t, 0);
base = addr;
- limit = fold_build2 (MINUS_EXPR, ptr_type_node,
- fold_build2 (PLUS_EXPR, ptr_type_node, base, size),
- integer_one_node);
+ limit = fold_build2 (POINTER_PLUS_EXPR, ptr_type_node,
+ fold_build2 (POINTER_PLUS_EXPR, ptr_type_node, base,
+ size),
+ size_int (-1));
break;
case TARGET_MEM_REF:
addr = tree_mem_ref_addr (ptr_type_node, t);
base = addr;
- limit = fold_build2 (MINUS_EXPR, ptr_type_node,
- fold_build2 (PLUS_EXPR, ptr_type_node, base, size),
- build_int_cst_type (ptr_type_node, 1));
+ limit = fold_build2 (POINTER_PLUS_EXPR, ptr_type_node,
+ fold_build2 (POINTER_PLUS_EXPR, ptr_type_node, base,
+ size),
+ size_int (-1));
break;
case ARRAY_RANGE_REF:
bpu = bitsize_int (BITS_PER_UNIT);
ofs = convert (bitsizetype, TREE_OPERAND (t, 2));
rem = size_binop (TRUNC_MOD_EXPR, ofs, bpu);
- ofs = size_binop (TRUNC_DIV_EXPR, ofs, bpu);
+ ofs = fold_convert (sizetype, size_binop (TRUNC_DIV_EXPR, ofs, bpu));
size = convert (bitsizetype, TREE_OPERAND (t, 1));
size = size_binop (PLUS_EXPR, size, rem);
addr = TREE_OPERAND (TREE_OPERAND (t, 0), 0);
addr = convert (ptr_type_node, addr);
- addr = fold_build2 (PLUS_EXPR, ptr_type_node, addr, ofs);
+ addr = fold_build2 (POINTER_PLUS_EXPR, ptr_type_node, addr, ofs);
base = addr;
- limit = fold_build2 (MINUS_EXPR, ptr_type_node,
- fold_build2 (PLUS_EXPR, ptr_type_node, base, size),
- integer_one_node);
+ limit = fold_build2 (POINTER_PLUS_EXPR, ptr_type_node,
+ fold_build2 (POINTER_PLUS_EXPR, ptr_type_node,
+ base, size),
+ size_int (-1));
}
break;
/* Only a few GIMPLE statements can reference memory. */
switch (TREE_CODE (s))
{
- case MODIFY_EXPR:
- mf_xform_derefs_1 (&i, &TREE_OPERAND (s, 0), EXPR_LOCUS (s),
- integer_one_node);
- mf_xform_derefs_1 (&i, &TREE_OPERAND (s, 1), EXPR_LOCUS (s),
- integer_zero_node);
+ case GIMPLE_MODIFY_STMT:
+ mf_xform_derefs_1 (&i, &GIMPLE_STMT_OPERAND (s, 0),
+ EXPR_LOCUS (s), integer_one_node);
+ mf_xform_derefs_1 (&i, &GIMPLE_STMT_OPERAND (s, 1),
+ EXPR_LOCUS (s), integer_zero_node);
break;
case RETURN_EXPR:
if (TREE_OPERAND (s, 0) != NULL_TREE)
{
- if (TREE_CODE (TREE_OPERAND (s, 0)) == MODIFY_EXPR)
- mf_xform_derefs_1 (&i, &TREE_OPERAND (TREE_OPERAND (s, 0), 1),
+ if (TREE_CODE (TREE_OPERAND (s, 0)) == GIMPLE_MODIFY_STMT)
+ mf_xform_derefs_1 (&i, &GIMPLE_STMT_OPERAND
+ (TREE_OPERAND (s, 0), 1),
EXPR_LOCUS (s), integer_zero_node);
else
mf_xform_derefs_1 (&i, &TREE_OPERAND (s, 0), EXPR_LOCUS (s),
&& ! TREE_STATIC (decl))
{
tree size = NULL_TREE, variable_name;
- tree unregister_fncall, unregister_fncall_params;
- tree register_fncall, register_fncall_params;
+ tree unregister_fncall, unregister_fncall_param;
+ tree register_fncall, register_fncall_param;
size = convert (size_type_node, TYPE_SIZE_UNIT (TREE_TYPE (decl)));
- /* (& VARIABLE, sizeof (VARIABLE), __MF_TYPE_STACK) */
- unregister_fncall_params =
- tree_cons (NULL_TREE,
- convert (ptr_type_node,
- mf_mark (build1 (ADDR_EXPR,
- build_pointer_type (TREE_TYPE (decl)),
- decl))),
- tree_cons (NULL_TREE,
- size,
- tree_cons (NULL_TREE,
- /* __MF_TYPE_STACK */
- build_int_cst (NULL_TREE, 3),
- NULL_TREE)));
- /* __mf_unregister (...) */
- unregister_fncall = build_function_call_expr (mf_unregister_fndecl,
- unregister_fncall_params);
-
- /* (& VARIABLE, sizeof (VARIABLE), __MF_TYPE_STACK, "name") */
+
+ unregister_fncall_param =
+ convert (ptr_type_node,
+ mf_mark (build1 (ADDR_EXPR,
+ build_pointer_type (TREE_TYPE (decl)),
+ decl)));
+ /* __mf_unregister (&VARIABLE, sizeof (VARIABLE), __MF_TYPE_STACK) */
+ unregister_fncall = build_call_expr (mf_unregister_fndecl, 3,
+ unregister_fncall_param,
+ size,
+ build_int_cst (NULL_TREE, 3));
+
+
variable_name = mf_varname_tree (decl);
- register_fncall_params =
- tree_cons (NULL_TREE,
- convert (ptr_type_node,
- mf_mark (build1 (ADDR_EXPR,
- build_pointer_type (TREE_TYPE (decl)),
- decl))),
- tree_cons (NULL_TREE,
- size,
- tree_cons (NULL_TREE,
- /* __MF_TYPE_STACK */
- build_int_cst (NULL_TREE, 3),
- tree_cons (NULL_TREE,
- variable_name,
- NULL_TREE))));
-
- /* __mf_register (...) */
- register_fncall = build_function_call_expr (mf_register_fndecl,
- register_fncall_params);
+ register_fncall_param =
+ convert (ptr_type_node,
+ mf_mark (build1 (ADDR_EXPR,
+ build_pointer_type (TREE_TYPE (decl)),
+ decl)));
+ /* __mf_register (&VARIABLE, sizeof (VARIABLE), __MF_TYPE_STACK,
+ "name") */
+ register_fncall = build_call_expr (mf_register_fndecl, 4,
+ register_fncall_param,
+ size,
+ build_int_cst (NULL_TREE, 3),
+ variable_name);
+
/* Accumulate the two calls. */
/* ??? Set EXPR_LOCATION. */
/* Add the __mf_register call at the current appending point. */
if (tsi_end_p (initially_stmts))
- warning (0, "mudflap cannot track %qs in stub function",
- IDENTIFIER_POINTER (DECL_NAME (decl)));
+ {
+ if (!DECL_ARTIFICIAL (decl))
+ warning (0, "mudflap cannot track %qs in stub function",
+ IDENTIFIER_POINTER (DECL_NAME (decl)));
+ }
else
{
- tsi_link_before (&initially_stmts, register_fncall, TSI_SAME_STMT);
+ tsi_link_before (&initially_stmts, register_fncall,
+ TSI_SAME_STMT);
/* Accumulate the FINALLY piece. */
append_to_statement_list (unregister_fncall, &finally_stmts);
void **slot;
if (marked_trees == NULL)
- marked_trees = htab_create_ggc (31, htab_hash_pointer, htab_eq_pointer, NULL);
+ marked_trees = htab_create_ggc (31, htab_hash_pointer, htab_eq_pointer,
+ NULL);
slot = htab_find_slot (marked_trees, t, INSERT);
*slot = t;
static void
mudflap_register_call (tree obj, tree object_size, tree varname)
{
- tree arg, args, call_stmt;
-
- args = tree_cons (NULL_TREE, varname, NULL_TREE);
-
- arg = build_int_cst (NULL_TREE, 4); /* __MF_TYPE_STATIC */
- args = tree_cons (NULL_TREE, arg, args);
-
- arg = convert (size_type_node, object_size);
- args = tree_cons (NULL_TREE, arg, args);
+ tree arg, call_stmt;
arg = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (obj)), obj);
arg = convert (ptr_type_node, arg);
- args = tree_cons (NULL_TREE, arg, args);
- call_stmt = build_function_call_expr (mf_register_fndecl, args);
+ call_stmt = build_call_expr (mf_register_fndecl, 4,
+ arg,
+ convert (size_type_node, object_size),
+ /* __MF_TYPE_STATIC */
+ build_int_cst (NULL_TREE, 4),
+ varname);
append_to_statement_list (call_stmt, &enqueued_call_stmt_chain);
}
{
tree ctor_statements = NULL_TREE;
+ /* No need to continue when there were errors. */
+ if (errorcount != 0 || sorrycount != 0)
+ return;
+
/* Insert a call to __mf_init. */
{
- tree call2_stmt = build_function_call_expr (mf_init_fndecl, NULL_TREE);
+ tree call2_stmt = build_call_expr (mf_init_fndecl, 0);
append_to_statement_list (call2_stmt, &ctor_statements);
}
/* If appropriate, call __mf_set_options to pass along read-ignore mode. */
if (flag_mudflap_ignore_reads)
{
- tree arg = tree_cons (NULL_TREE,
- mf_build_string ("-ignore-reads"), NULL_TREE);
- tree call_stmt = build_function_call_expr (mf_set_options_fndecl, arg);
+ tree arg = mf_build_string ("-ignore-reads");
+ tree call_stmt = build_call_expr (mf_set_options_fndecl, 1, arg);
append_to_statement_list (call_stmt, &ctor_statements);
}
{
gcc_assert (DECL_P (obj));
- if (TREE_TYPE (obj) == error_mark_node)
- continue;
-
if (mf_marked_p (obj))
continue;
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