/* Mudflap: narrow-pointer bounds-checking by tree rewriting.
- Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ 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, 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/>. */
#include "config.h"
-#include "errors.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "langhooks.h"
#include "ggc.h"
#include "cgraph.h"
+#include "toplev.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);
static void mf_decl_cache_locals (void);
static void mf_decl_clear_locals (void);
static void mf_xform_derefs (void);
-static void execute_mudflap_function_ops (void);
+static unsigned int execute_mudflap_function_ops (void);
/* Addressable variables instrumentation. */
static void mf_xform_decls (tree, tree);
static tree mx_xfn_xform_decls (tree *, int *, void *);
static void mx_register_decls (tree, tree *);
-static void execute_mudflap_function_decls (void);
+static unsigned int execute_mudflap_function_decls (void);
/* ------------------------------------------------------------------------ */
const char *sourcefile;
unsigned sourceline = xloc.line;
unsigned sourcecolumn = 0;
-#ifdef USE_MAPPED_LOCATION
sourcecolumn = xloc.column;
-#endif
sourcefile = xloc.file;
if (sourcefile == NULL && current_function_decl != NULL_TREE)
sourcefile = DECL_SOURCE_FILE (current_function_decl);
{
const char *declname = NULL;
- if (strcmp ("GNU C++", lang_hooks.name) == 0 &&
- DECL_NAME (decl) != NULL)
+ if (DECL_NAME (decl) != NULL)
{
- /* The gcc/cp decl_printable_name hook doesn't do as good a job as
- the libiberty demangler. */
- declname = cplus_demangle (IDENTIFIER_POINTER (DECL_NAME (decl)),
- DMGL_AUTO | DMGL_VERBOSE);
+ if (strcmp ("GNU C++", lang_hooks.name) == 0)
+ {
+ /* The gcc/cp decl_printable_name hook doesn't do as good a job as
+ the libiberty demangler. */
+ declname = cplus_demangle (IDENTIFIER_POINTER (DECL_NAME (decl)),
+ DMGL_AUTO | DMGL_VERBOSE);
+ }
+ if (declname == NULL)
+ declname = lang_hooks.decl_printable_name (decl, 3);
}
-
- if (declname == NULL)
- declname = lang_hooks.decl_printable_name (decl, 3);
-
if (declname == NULL)
declname = "<unnamed variable>";
if (xloc.line > 0)
{
-#ifdef USE_MAPPED_LOCATION
if (xloc.column > 0)
sprintf (linecolbuf, "%d:%d", xloc.line, xloc.column);
else
-#endif
sprintf (linecolbuf, "%d", xloc.line);
colon = ":";
line = linecolbuf;
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. */
tree optimizations have been performed, but we have to preserve the CFG
for expansion from trees to RTL. */
-static void
+static unsigned int
execute_mudflap_function_ops (void)
{
/* Don't instrument functions such as the synthetic constructor
built during mudflap_finish_file. */
if (mf_marked_p (current_function_decl) ||
DECL_ARTIFICIAL (current_function_decl))
- return;
+ return 0;
push_gimplify_context ();
mf_decl_clear_locals ();
pop_gimplify_context (NULL);
+ return 0;
}
/* Create and initialize local shadow variables for the lookup cache
/* Build initialization nodes for the cache vars. We just load the
globals into the cache variables. */
- t = build (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 = build (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;
block_stmt_iterator bsi;
basic_block cond_bb, then_bb, join_bb;
edge e;
- tree cond, t, u, v, l1, l2;
+ tree cond, t, u, v;
tree mf_base;
tree mf_elem;
tree mf_limit;
/* We first need to split the current basic block, and start altering
the CFG. This allows us to insert the statements we're about to
- construct into the right basic blocks. The label l1 is the label
- of the block for the THEN clause of the conditional jump we're
- about to construct, and l2 is the ELSE clause, which is just the
- continuation of the old statement stream. */
- l1 = create_artificial_label ();
- l2 = create_artificial_label ();
+ construct into the right basic blocks. */
+
cond_bb = bb_for_stmt (bsi_stmt (*instr_bsi));
bsi = *instr_bsi;
bsi_prev (&bsi);
if (! bsi_end_p (bsi))
- {
- /* We're processing a statement in the middle of the block, so
- we need to split the block. This creates a new block and a new
- fallthrough edge. */
- e = split_block (cond_bb, bsi_stmt (bsi));
- cond_bb = e->src;
- join_bb = e->dest;
- }
+ e = split_block (cond_bb, bsi_stmt (bsi));
else
- {
- /* We're processing the first statement in the block, so we need
- to split the incoming edge. This also creates a new block
- and a new fallthrough edge. */
- join_bb = cond_bb;
- cond_bb = split_edge (find_edge (join_bb->prev_bb, join_bb));
- }
-
+ e = split_block_after_labels (cond_bb);
+ cond_bb = e->src;
+ join_bb = e->dest;
+
/* A recap at this point: join_bb is the basic block at whose head
is the gimple statement for which this check expression is being
built. cond_bb is the (possibly new, synthetic) basic block the
make_edge (cond_bb, then_bb, EDGE_TRUE_VALUE);
make_single_succ_edge (then_bb, join_bb, EDGE_FALLTHRU);
- /* We expect that the conditional jump we will construct will not
- be taken very often as it basically is an exception condition. */
- predict_edge_def (EDGE_PRED (then_bb, 0), PRED_MUDFLAP, NOT_TAKEN);
-
/* Mark the pseudo-fallthrough edge from cond_bb to join_bb. */
e = find_edge (cond_bb, join_bb);
e->flags = EDGE_FALSE_VALUE;
- predict_edge_def (e, PRED_MUDFLAP, TAKEN);
+ e->count = cond_bb->count;
+ e->probability = REG_BR_PROB_BASE;
/* Update dominance info. Note that bb_join's data was
updated by split_block. */
mf_limit = create_tmp_var (mf_uintptr_type, "__mf_limit");
/* Build: __mf_base = (uintptr_t) <base address expression>. */
- t = build (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 = build (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 = build (RSHIFT_EXPR, mf_uintptr_type, mf_base,
- (flag_mudflap_threads ? mf_cache_shift_decl : mf_cache_shift_decl_l));
- t = build (BIT_AND_EXPR, mf_uintptr_type, t,
- (flag_mudflap_threads ? mf_cache_mask_decl : mf_cache_mask_decl_l));
- t = build (ARRAY_REF,
- TREE_TYPE (TREE_TYPE (mf_cache_array_decl)),
- mf_cache_array_decl, t, NULL_TREE, NULL_TREE);
+ t = build2 (RSHIFT_EXPR, mf_uintptr_type, mf_base,
+ 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);
+ 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 = build (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);
the edge to the THEN clause of the conditional jump as unlikely. */
/* Construct t <-- '__mf_elem->low > __mf_base'. */
- t = build (COMPONENT_REF, mf_uintptr_type,
- build1 (INDIRECT_REF, mf_cache_struct_type, mf_elem),
- TYPE_FIELDS (mf_cache_struct_type), NULL_TREE);
- t = build (GT_EXPR, boolean_type_node, t, mf_base);
+ t = build3 (COMPONENT_REF, mf_uintptr_type,
+ build1 (INDIRECT_REF, mf_cache_struct_type, mf_elem),
+ TYPE_FIELDS (mf_cache_struct_type), NULL_TREE);
+ t = build2 (GT_EXPR, boolean_type_node, t, mf_base);
/* Construct '__mf_elem->high < __mf_limit'.
Then build 'u <-- (u < v). */
- u = build (COMPONENT_REF, mf_uintptr_type,
- build1 (INDIRECT_REF, mf_cache_struct_type, mf_elem),
- TREE_CHAIN (TYPE_FIELDS (mf_cache_struct_type)), NULL_TREE);
+ u = build3 (COMPONENT_REF, mf_uintptr_type,
+ build1 (INDIRECT_REF, mf_cache_struct_type, mf_elem),
+ TREE_CHAIN (TYPE_FIELDS (mf_cache_struct_type)), NULL_TREE);
v = mf_limit;
- u = build (LT_EXPR, boolean_type_node, u, v);
+ u = build2 (LT_EXPR, boolean_type_node, u, v);
/* Build the composed conditional: t <-- 't || u'. Then store the
result of the evaluation of 't' in a temporary variable which we
can use as the condition for the conditional jump. */
- t = build (TRUTH_OR_EXPR, boolean_type_node, t, u);
+ t = build2 (TRUTH_OR_EXPR, boolean_type_node, t, u);
cond = create_tmp_var (boolean_type_node, "__mf_unlikely_cond");
- t = build (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 = build (COND_EXPR, void_type_node, cond,
- build (GOTO_EXPR, void_type_node, tree_block_label (then_bb)),
- build (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 (build (PLUS_EXPR, integer_type_node,
- fold (build (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 = build (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 = build (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. */
+ /* 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. */
- && DECL_VALUE_EXPR (decl) == NULL);
+ && !DECL_HAS_VALUE_EXPR_P (decl));
}
mf_xform_derefs_1 (block_stmt_iterator *iter, tree *tp,
location_t *locus, tree dirflag)
{
- tree type, ptr_type, base, limit, addr, size, t;
+ tree type, base, limit, addr, size, t;
/* Don't instrument read operations. */
if (dirflag == integer_zero_node && flag_mudflap_ignore_reads)
t = *tp;
type = TREE_TYPE (t);
+
+ if (type == error_mark_node)
+ return;
+
size = TYPE_SIZE_UNIT (type);
switch (TREE_CODE (t))
recurse all the way down the nesting structure to figure it
out: looking just at the outer node is not enough. */
tree var;
- int component_ref_only = TREE_CODE (t) == COMPONENT_REF;
+ int component_ref_only = (TREE_CODE (t) == COMPONENT_REF);
+ /* If we have a bitfield component reference, we must note the
+ innermost addressable object in ELT, from which we will
+ construct the byte-addressable bounds of the bitfield. */
+ tree elt = NULL_TREE;
+ int bitfield_ref_p = (TREE_CODE (t) == COMPONENT_REF
+ && DECL_BIT_FIELD_TYPE (TREE_OPERAND (t, 1)));
/* Iterate to the top of the ARRAY_REF/COMPONENT_REF
containment hierarchy to find the outermost VAR_DECL. */
var = TREE_OPERAND (t, 0);
while (1)
{
+ if (bitfield_ref_p && elt == NULL_TREE
+ && (TREE_CODE (var) == ARRAY_REF
+ || TREE_CODE (var) == COMPONENT_REF))
+ elt = var;
+
if (TREE_CODE (var) == ARRAY_REF)
{
component_ref_only = 0;
var = TREE_OPERAND (var, 0);
else if (INDIRECT_REF_P (var))
{
- component_ref_only = 0;
+ base = TREE_OPERAND (var, 0);
break;
}
else
{
gcc_assert (TREE_CODE (var) == VAR_DECL
- || TREE_CODE (var) == PARM_DECL);
+ || TREE_CODE (var) == PARM_DECL
+ || TREE_CODE (var) == RESULT_DECL
+ || TREE_CODE (var) == STRING_CST);
/* Don't instrument this access if the underlying
variable is not "eligible". This test matches
those arrays that have only known-valid indexes,
and thus are not labeled TREE_ADDRESSABLE. */
- if (! mf_decl_eligible_p (var))
+ if (! mf_decl_eligible_p (var) || component_ref_only)
return;
else
- break;
+ {
+ base = build1 (ADDR_EXPR,
+ build_pointer_type (TREE_TYPE (var)), var);
+ break;
+ }
}
}
Note that it's possible for such a struct variable to match
the eligible_p test because someone else might take its
address sometime. */
- if (component_ref_only)
- return;
-
- ptr_type = build_pointer_type (type);
/* We need special processing for bitfield components, because
their addresses cannot be taken. */
- if (TREE_CODE (t) == COMPONENT_REF
- && DECL_BIT_FIELD_TYPE (TREE_OPERAND (t, 1)))
+ if (bitfield_ref_p)
{
tree field = TREE_OPERAND (t, 1);
if (TREE_CODE (DECL_SIZE_UNIT (field)) == INTEGER_CST)
size = DECL_SIZE_UNIT (field);
- addr = TREE_OPERAND (TREE_OPERAND (t, 0), 0);
- addr = fold_convert (ptr_type_node, addr);
- addr = fold (build (PLUS_EXPR, ptr_type_node,
- addr, fold_convert (ptr_type_node,
- byte_position (field))));
+ if (elt)
+ elt = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (elt)),
+ elt);
+ addr = fold_convert (ptr_type_node, elt ? elt : base);
+ addr = fold_build2 (POINTER_PLUS_EXPR, ptr_type_node,
+ addr, fold_convert (sizetype,
+ byte_position (field)));
}
else
addr = build1 (ADDR_EXPR, build_pointer_type (type), t);
- if (INDIRECT_REF_P (var))
- base = TREE_OPERAND (var, 0);
- else
- base = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (var)), var);
- limit = fold (build (MINUS_EXPR, mf_uintptr_type,
- fold (build2 (PLUS_EXPR, mf_uintptr_type,
- convert (mf_uintptr_type, addr),
- size)),
- integer_one_node));
+ limit = fold_build2 (MINUS_EXPR, mf_uintptr_type,
+ fold_build2 (PLUS_EXPR, mf_uintptr_type,
+ convert (mf_uintptr_type, addr),
+ size),
+ integer_one_node);
}
break;
case INDIRECT_REF:
addr = TREE_OPERAND (t, 0);
- ptr_type = TREE_TYPE (addr);
base = addr;
- limit = fold (build (MINUS_EXPR, ptr_type_node,
- fold (build (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 (POINTER_PLUS_EXPR, ptr_type_node,
+ fold_build2 (POINTER_PLUS_EXPR, ptr_type_node, base,
+ size),
+ size_int (-1));
break;
case ARRAY_RANGE_REF:
- warning ("mudflap checking not yet implemented for ARRAY_RANGE_REF");
+ warning (0, "mudflap checking not yet implemented for ARRAY_RANGE_REF");
return;
case BIT_FIELD_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 (build (PLUS_EXPR, ptr_type_node, addr, ofs));
+ addr = fold_build2 (POINTER_PLUS_EXPR, ptr_type_node, addr, ofs);
base = addr;
- limit = fold (build (MINUS_EXPR, ptr_type_node,
- fold (build (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),
of their BIND_EXPR binding context, and we lose liveness information
for the declarations we wish to instrument. */
-static void
+static unsigned int
execute_mudflap_function_decls (void)
{
/* Don't instrument functions such as the synthetic constructor
built during mudflap_finish_file. */
if (mf_marked_p (current_function_decl) ||
DECL_ARTIFICIAL (current_function_decl))
- return;
+ return 0;
push_gimplify_context ();
DECL_ARGUMENTS (current_function_decl));
pop_gimplify_context (NULL);
+ return 0;
}
/* This struct is passed between mf_xform_decls to store state needed
&& ! 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))
- internal_error ("mudflap ran off end of BIND_EXPR body");
- tsi_link_before (&initially_stmts, register_fncall, TSI_SAME_STMT);
-
- /* Accumulate the FINALLY piece. */
- append_to_statement_list (unregister_fncall, &finally_stmts);
-
+ {
+ 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);
+
+ /* Accumulate the FINALLY piece. */
+ append_to_statement_list (unregister_fncall, &finally_stmts);
+ }
mf_mark (decl);
}
/* Actually, (initially_stmts!=NULL) <=> (finally_stmts!=NULL) */
if (finally_stmts != NULL_TREE)
{
- tree t = build (TRY_FINALLY_EXPR, void_type_node,
- *stmt_list, finally_stmts);
+ tree t = build2 (TRY_FINALLY_EXPR, void_type_node,
+ *stmt_list, finally_stmts);
*stmt_list = NULL;
append_to_statement_list (t, stmt_list);
}
break;
}
- return NULL;
+ return NULL_TREE;
}
/* Perform the object lifetime tracking mudflap transform on the given function
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;
delayed until program finish time. If they're still incomplete by
then, warnings are emitted. */
-static GTY (()) varray_type deferred_static_decls;
+static GTY (()) VEC(tree,gc) *deferred_static_decls;
/* A list of statements for calling __mf_register() at startup time. */
static GTY (()) tree enqueued_call_stmt_chain;
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);
}
if (DECL_P (obj) && DECL_EXTERNAL (obj) && DECL_ARTIFICIAL (obj))
return;
- if (! deferred_static_decls)
- VARRAY_TREE_INIT (deferred_static_decls, 10, "deferred static list");
-
- VARRAY_PUSH_TREE (deferred_static_decls, obj);
+ VEC_safe_push (tree, gc, deferred_static_decls, obj);
}
{
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);
}
if (deferred_static_decls)
{
size_t i;
- for (i = 0; i < VARRAY_ACTIVE_SIZE (deferred_static_decls); i++)
+ tree obj;
+ for (i = 0; VEC_iterate (tree, deferred_static_decls, i, obj); i++)
{
- tree obj = VARRAY_TREE (deferred_static_decls, i);
-
gcc_assert (DECL_P (obj));
if (mf_marked_p (obj))
Perform registration for non-static objects regardless of
TREE_USED or TREE_ADDRESSABLE, because they may be used
from other compilation units. */
- if (TREE_STATIC (obj) && ! TREE_ADDRESSABLE (obj))
+ if (! TREE_PUBLIC (obj) && ! TREE_ADDRESSABLE (obj))
continue;
if (! COMPLETE_TYPE_P (TREE_TYPE (obj)))
{
- warning ("mudflap cannot track unknown size extern %qs",
+ warning (0, "mudflap cannot track unknown size extern %qs",
IDENTIFIER_POINTER (DECL_NAME (obj)));
continue;
}
mf_varname_tree (obj));
}
- VARRAY_CLEAR (deferred_static_decls);
+ VEC_truncate (tree, deferred_static_decls, 0);
}
/* Append all the enqueued registration calls. */
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