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Retro68/gcc/gcc/tsan.c
Wolfgang Thaller 41040e16f5 Update gcc to 5.2.0
2015-08-28 17:33:40 +02:00

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/* GCC instrumentation plugin for ThreadSanitizer.
Copyright (C) 2011-2015 Free Software Foundation, Inc.
Contributed by Dmitry Vyukov <dvyukov@google.com>
This file is part of GCC.
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 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "hash-set.h"
#include "machmode.h"
#include "vec.h"
#include "double-int.h"
#include "input.h"
#include "alias.h"
#include "symtab.h"
#include "options.h"
#include "wide-int.h"
#include "inchash.h"
#include "tree.h"
#include "fold-const.h"
#include "hashtab.h"
#include "tm.h"
#include "hard-reg-set.h"
#include "function.h"
#include "rtl.h"
#include "flags.h"
#include "statistics.h"
#include "real.h"
#include "fixed-value.h"
#include "insn-config.h"
#include "expmed.h"
#include "dojump.h"
#include "explow.h"
#include "calls.h"
#include "emit-rtl.h"
#include "varasm.h"
#include "stmt.h"
#include "expr.h"
#include "intl.h"
#include "predict.h"
#include "dominance.h"
#include "cfg.h"
#include "basic-block.h"
#include "tree-ssa-alias.h"
#include "internal-fn.h"
#include "gimple-expr.h"
#include "is-a.h"
#include "gimple.h"
#include "gimplify.h"
#include "gimple-iterator.h"
#include "gimplify-me.h"
#include "gimple-ssa.h"
#include "hash-map.h"
#include "plugin-api.h"
#include "ipa-ref.h"
#include "cgraph.h"
#include "tree-cfg.h"
#include "stringpool.h"
#include "tree-ssanames.h"
#include "tree-pass.h"
#include "tree-iterator.h"
#include "langhooks.h"
#include "output.h"
#include "target.h"
#include "diagnostic.h"
#include "tree-ssa-propagate.h"
#include "tree-ssa-loop-ivopts.h"
#include "tsan.h"
#include "asan.h"
#include "builtins.h"
/* Number of instrumented memory accesses in the current function. */
/* Builds the following decl
void __tsan_read/writeX (void *addr); */
static tree
get_memory_access_decl (bool is_write, unsigned size)
{
enum built_in_function fcode;
if (size <= 1)
fcode = is_write ? BUILT_IN_TSAN_WRITE1
: BUILT_IN_TSAN_READ1;
else if (size <= 3)
fcode = is_write ? BUILT_IN_TSAN_WRITE2
: BUILT_IN_TSAN_READ2;
else if (size <= 7)
fcode = is_write ? BUILT_IN_TSAN_WRITE4
: BUILT_IN_TSAN_READ4;
else if (size <= 15)
fcode = is_write ? BUILT_IN_TSAN_WRITE8
: BUILT_IN_TSAN_READ8;
else
fcode = is_write ? BUILT_IN_TSAN_WRITE16
: BUILT_IN_TSAN_READ16;
return builtin_decl_implicit (fcode);
}
/* Check as to whether EXPR refers to a store to vptr. */
static tree
is_vptr_store (gimple stmt, tree expr, bool is_write)
{
if (is_write == true
&& gimple_assign_single_p (stmt)
&& TREE_CODE (expr) == COMPONENT_REF)
{
tree field = TREE_OPERAND (expr, 1);
if (TREE_CODE (field) == FIELD_DECL
&& DECL_VIRTUAL_P (field))
return gimple_assign_rhs1 (stmt);
}
return NULL;
}
/* Instruments EXPR if needed. If any instrumentation is inserted,
return true. */
static bool
instrument_expr (gimple_stmt_iterator gsi, tree expr, bool is_write)
{
tree base, rhs, expr_ptr, builtin_decl;
basic_block bb;
HOST_WIDE_INT size;
gimple stmt, g;
gimple_seq seq;
location_t loc;
unsigned int align;
size = int_size_in_bytes (TREE_TYPE (expr));
if (size <= 0)
return false;
HOST_WIDE_INT bitsize, bitpos;
tree offset;
machine_mode mode;
int volatilep = 0, unsignedp = 0;
base = get_inner_reference (expr, &bitsize, &bitpos, &offset,
&mode, &unsignedp, &volatilep, false);
/* No need to instrument accesses to decls that don't escape,
they can't escape to other threads then. */
if (DECL_P (base) && !is_global_var (base))
{
struct pt_solution pt;
memset (&pt, 0, sizeof (pt));
pt.escaped = 1;
pt.ipa_escaped = flag_ipa_pta != 0;
if (!pt_solution_includes (&pt, base))
return false;
if (!may_be_aliased (base))
return false;
}
if (TREE_READONLY (base)
|| (TREE_CODE (base) == VAR_DECL
&& DECL_HARD_REGISTER (base)))
return false;
stmt = gsi_stmt (gsi);
loc = gimple_location (stmt);
rhs = is_vptr_store (stmt, expr, is_write);
if ((TREE_CODE (expr) == COMPONENT_REF
&& DECL_BIT_FIELD_TYPE (TREE_OPERAND (expr, 1)))
|| TREE_CODE (expr) == BIT_FIELD_REF)
{
base = TREE_OPERAND (expr, 0);
if (TREE_CODE (expr) == COMPONENT_REF)
{
expr = TREE_OPERAND (expr, 1);
if (is_write && DECL_BIT_FIELD_REPRESENTATIVE (expr))
expr = DECL_BIT_FIELD_REPRESENTATIVE (expr);
if (!tree_fits_uhwi_p (DECL_FIELD_OFFSET (expr))
|| !tree_fits_uhwi_p (DECL_FIELD_BIT_OFFSET (expr))
|| !tree_fits_uhwi_p (DECL_SIZE (expr)))
return false;
bitpos = tree_to_uhwi (DECL_FIELD_OFFSET (expr)) * BITS_PER_UNIT
+ tree_to_uhwi (DECL_FIELD_BIT_OFFSET (expr));
bitsize = tree_to_uhwi (DECL_SIZE (expr));
}
else
{
if (!tree_fits_uhwi_p (TREE_OPERAND (expr, 2))
|| !tree_fits_uhwi_p (TREE_OPERAND (expr, 1)))
return false;
bitpos = tree_to_uhwi (TREE_OPERAND (expr, 2));
bitsize = tree_to_uhwi (TREE_OPERAND (expr, 1));
}
if (bitpos < 0 || bitsize <= 0)
return false;
size = (bitpos % BITS_PER_UNIT + bitsize + BITS_PER_UNIT - 1)
/ BITS_PER_UNIT;
if (may_be_nonaddressable_p (base))
return false;
align = get_object_alignment (base);
if (align < BITS_PER_UNIT)
return false;
bitpos = bitpos & ~(BITS_PER_UNIT - 1);
if ((align - 1) & bitpos)
{
align = (align - 1) & bitpos;
align = align & -align;
}
expr = build_fold_addr_expr (unshare_expr (base));
expr = build2 (MEM_REF, char_type_node, expr,
build_int_cst (TREE_TYPE (expr), bitpos / BITS_PER_UNIT));
expr_ptr = build_fold_addr_expr (expr);
}
else
{
if (may_be_nonaddressable_p (expr))
return false;
align = get_object_alignment (expr);
if (align < BITS_PER_UNIT)
return false;
expr_ptr = build_fold_addr_expr (unshare_expr (expr));
}
expr_ptr = force_gimple_operand (expr_ptr, &seq, true, NULL_TREE);
if ((size & (size - 1)) != 0 || size > 16
|| align < MIN (size, 8) * BITS_PER_UNIT)
{
builtin_decl = builtin_decl_implicit (is_write
? BUILT_IN_TSAN_WRITE_RANGE
: BUILT_IN_TSAN_READ_RANGE);
g = gimple_build_call (builtin_decl, 2, expr_ptr, size_int (size));
}
else if (rhs == NULL)
g = gimple_build_call (get_memory_access_decl (is_write, size),
1, expr_ptr);
else
{
builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE);
g = gimple_build_call (builtin_decl, 2, expr_ptr, unshare_expr (rhs));
}
gimple_set_location (g, loc);
gimple_seq_add_stmt_without_update (&seq, g);
/* Instrumentation for assignment of a function result
must be inserted after the call. Instrumentation for
reads of function arguments must be inserted before the call.
That's because the call can contain synchronization. */
if (is_gimple_call (stmt) && is_write)
{
/* If the call can throw, it must be the last stmt in
a basic block, so the instrumented stmts need to be
inserted in successor bbs. */
if (is_ctrl_altering_stmt (stmt))
{
edge e;
bb = gsi_bb (gsi);
e = find_fallthru_edge (bb->succs);
if (e)
gsi_insert_seq_on_edge_immediate (e, seq);
}
else
gsi_insert_seq_after (&gsi, seq, GSI_NEW_STMT);
}
else
gsi_insert_seq_before (&gsi, seq, GSI_SAME_STMT);
return true;
}
/* Actions for sync/atomic builtin transformations. */
enum tsan_atomic_action
{
check_last, add_seq_cst, add_acquire, weak_cas, strong_cas,
bool_cas, val_cas, lock_release, fetch_op, fetch_op_seq_cst
};
/* Table how to map sync/atomic builtins to their corresponding
tsan equivalents. */
static const struct tsan_map_atomic
{
enum built_in_function fcode, tsan_fcode;
enum tsan_atomic_action action;
enum tree_code code;
} tsan_atomic_table[] =
{
#define TRANSFORM(fcode, tsan_fcode, action, code) \
{ BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
#define CHECK_LAST(fcode, tsan_fcode) \
TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
#define ADD_SEQ_CST(fcode, tsan_fcode) \
TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
#define ADD_ACQUIRE(fcode, tsan_fcode) \
TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
#define WEAK_CAS(fcode, tsan_fcode) \
TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
#define STRONG_CAS(fcode, tsan_fcode) \
TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
#define BOOL_CAS(fcode, tsan_fcode) \
TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
#define VAL_CAS(fcode, tsan_fcode) \
TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
#define LOCK_RELEASE(fcode, tsan_fcode) \
TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
#define FETCH_OP(fcode, tsan_fcode, code) \
TRANSFORM (fcode, tsan_fcode, fetch_op, code)
#define FETCH_OPS(fcode, tsan_fcode, code) \
TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
CHECK_LAST (ATOMIC_LOAD_1, TSAN_ATOMIC8_LOAD),
CHECK_LAST (ATOMIC_LOAD_2, TSAN_ATOMIC16_LOAD),
CHECK_LAST (ATOMIC_LOAD_4, TSAN_ATOMIC32_LOAD),
CHECK_LAST (ATOMIC_LOAD_8, TSAN_ATOMIC64_LOAD),
CHECK_LAST (ATOMIC_LOAD_16, TSAN_ATOMIC128_LOAD),
CHECK_LAST (ATOMIC_STORE_1, TSAN_ATOMIC8_STORE),
CHECK_LAST (ATOMIC_STORE_2, TSAN_ATOMIC16_STORE),
CHECK_LAST (ATOMIC_STORE_4, TSAN_ATOMIC32_STORE),
CHECK_LAST (ATOMIC_STORE_8, TSAN_ATOMIC64_STORE),
CHECK_LAST (ATOMIC_STORE_16, TSAN_ATOMIC128_STORE),
CHECK_LAST (ATOMIC_EXCHANGE_1, TSAN_ATOMIC8_EXCHANGE),
CHECK_LAST (ATOMIC_EXCHANGE_2, TSAN_ATOMIC16_EXCHANGE),
CHECK_LAST (ATOMIC_EXCHANGE_4, TSAN_ATOMIC32_EXCHANGE),
CHECK_LAST (ATOMIC_EXCHANGE_8, TSAN_ATOMIC64_EXCHANGE),
CHECK_LAST (ATOMIC_EXCHANGE_16, TSAN_ATOMIC128_EXCHANGE),
CHECK_LAST (ATOMIC_FETCH_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
CHECK_LAST (ATOMIC_FETCH_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
CHECK_LAST (ATOMIC_FETCH_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
CHECK_LAST (ATOMIC_FETCH_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
CHECK_LAST (ATOMIC_FETCH_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
CHECK_LAST (ATOMIC_FETCH_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
CHECK_LAST (ATOMIC_FETCH_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
CHECK_LAST (ATOMIC_FETCH_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
CHECK_LAST (ATOMIC_FETCH_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
CHECK_LAST (ATOMIC_FETCH_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
CHECK_LAST (ATOMIC_FETCH_AND_1, TSAN_ATOMIC8_FETCH_AND),
CHECK_LAST (ATOMIC_FETCH_AND_2, TSAN_ATOMIC16_FETCH_AND),
CHECK_LAST (ATOMIC_FETCH_AND_4, TSAN_ATOMIC32_FETCH_AND),
CHECK_LAST (ATOMIC_FETCH_AND_8, TSAN_ATOMIC64_FETCH_AND),
CHECK_LAST (ATOMIC_FETCH_AND_16, TSAN_ATOMIC128_FETCH_AND),
CHECK_LAST (ATOMIC_FETCH_OR_1, TSAN_ATOMIC8_FETCH_OR),
CHECK_LAST (ATOMIC_FETCH_OR_2, TSAN_ATOMIC16_FETCH_OR),
CHECK_LAST (ATOMIC_FETCH_OR_4, TSAN_ATOMIC32_FETCH_OR),
CHECK_LAST (ATOMIC_FETCH_OR_8, TSAN_ATOMIC64_FETCH_OR),
CHECK_LAST (ATOMIC_FETCH_OR_16, TSAN_ATOMIC128_FETCH_OR),
CHECK_LAST (ATOMIC_FETCH_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
CHECK_LAST (ATOMIC_FETCH_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
CHECK_LAST (ATOMIC_FETCH_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
CHECK_LAST (ATOMIC_FETCH_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
CHECK_LAST (ATOMIC_FETCH_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
CHECK_LAST (ATOMIC_FETCH_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
CHECK_LAST (ATOMIC_FETCH_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
CHECK_LAST (ATOMIC_FETCH_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
CHECK_LAST (ATOMIC_FETCH_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
CHECK_LAST (ATOMIC_FETCH_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
CHECK_LAST (ATOMIC_THREAD_FENCE, TSAN_ATOMIC_THREAD_FENCE),
CHECK_LAST (ATOMIC_SIGNAL_FENCE, TSAN_ATOMIC_SIGNAL_FENCE),
FETCH_OP (ATOMIC_ADD_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
FETCH_OP (ATOMIC_ADD_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
FETCH_OP (ATOMIC_ADD_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
FETCH_OP (ATOMIC_ADD_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
FETCH_OP (ATOMIC_ADD_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
FETCH_OP (ATOMIC_SUB_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
FETCH_OP (ATOMIC_SUB_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
FETCH_OP (ATOMIC_SUB_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
FETCH_OP (ATOMIC_SUB_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
FETCH_OP (ATOMIC_SUB_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
FETCH_OP (ATOMIC_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
FETCH_OP (ATOMIC_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
FETCH_OP (ATOMIC_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
FETCH_OP (ATOMIC_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
FETCH_OP (ATOMIC_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
FETCH_OP (ATOMIC_OR_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
FETCH_OP (ATOMIC_OR_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
FETCH_OP (ATOMIC_OR_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
FETCH_OP (ATOMIC_OR_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
FETCH_OP (ATOMIC_OR_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
FETCH_OP (ATOMIC_XOR_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OP (ATOMIC_XOR_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OP (ATOMIC_XOR_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OP (ATOMIC_XOR_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OP (ATOMIC_XOR_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OP (ATOMIC_NAND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
FETCH_OP (ATOMIC_NAND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
FETCH_OP (ATOMIC_NAND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
FETCH_OP (ATOMIC_NAND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
FETCH_OP (ATOMIC_NAND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1, TSAN_ATOMIC8_EXCHANGE),
ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2, TSAN_ATOMIC16_EXCHANGE),
ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4, TSAN_ATOMIC32_EXCHANGE),
ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8, TSAN_ATOMIC64_EXCHANGE),
ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16, TSAN_ATOMIC128_EXCHANGE),
ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
ADD_SEQ_CST (SYNC_FETCH_AND_AND_1, TSAN_ATOMIC8_FETCH_AND),
ADD_SEQ_CST (SYNC_FETCH_AND_AND_2, TSAN_ATOMIC16_FETCH_AND),
ADD_SEQ_CST (SYNC_FETCH_AND_AND_4, TSAN_ATOMIC32_FETCH_AND),
ADD_SEQ_CST (SYNC_FETCH_AND_AND_8, TSAN_ATOMIC64_FETCH_AND),
ADD_SEQ_CST (SYNC_FETCH_AND_AND_16, TSAN_ATOMIC128_FETCH_AND),
ADD_SEQ_CST (SYNC_FETCH_AND_OR_1, TSAN_ATOMIC8_FETCH_OR),
ADD_SEQ_CST (SYNC_FETCH_AND_OR_2, TSAN_ATOMIC16_FETCH_OR),
ADD_SEQ_CST (SYNC_FETCH_AND_OR_4, TSAN_ATOMIC32_FETCH_OR),
ADD_SEQ_CST (SYNC_FETCH_AND_OR_8, TSAN_ATOMIC64_FETCH_OR),
ADD_SEQ_CST (SYNC_FETCH_AND_OR_16, TSAN_ATOMIC128_FETCH_OR),
ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
ADD_SEQ_CST (SYNC_SYNCHRONIZE, TSAN_ATOMIC_THREAD_FENCE),
FETCH_OPS (SYNC_ADD_AND_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
FETCH_OPS (SYNC_ADD_AND_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
FETCH_OPS (SYNC_ADD_AND_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
FETCH_OPS (SYNC_ADD_AND_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
FETCH_OPS (SYNC_ADD_AND_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
FETCH_OPS (SYNC_SUB_AND_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
FETCH_OPS (SYNC_SUB_AND_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
FETCH_OPS (SYNC_SUB_AND_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
FETCH_OPS (SYNC_SUB_AND_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
FETCH_OPS (SYNC_SUB_AND_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
FETCH_OPS (SYNC_AND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
FETCH_OPS (SYNC_AND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
FETCH_OPS (SYNC_AND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
FETCH_OPS (SYNC_AND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
FETCH_OPS (SYNC_AND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
FETCH_OPS (SYNC_OR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
FETCH_OPS (SYNC_OR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
FETCH_OPS (SYNC_OR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
FETCH_OPS (SYNC_OR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
FETCH_OPS (SYNC_OR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
FETCH_OPS (SYNC_XOR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OPS (SYNC_XOR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OPS (SYNC_XOR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OPS (SYNC_XOR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OPS (SYNC_XOR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
FETCH_OPS (SYNC_NAND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
FETCH_OPS (SYNC_NAND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
FETCH_OPS (SYNC_NAND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
FETCH_OPS (SYNC_NAND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
FETCH_OPS (SYNC_NAND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK),
WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK),
WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK),
WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK),
WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK),
STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2,
TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4,
TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8,
TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16,
TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1,
TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2,
TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4,
TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8,
TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16,
TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16,
TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
LOCK_RELEASE (SYNC_LOCK_RELEASE_1, TSAN_ATOMIC8_STORE),
LOCK_RELEASE (SYNC_LOCK_RELEASE_2, TSAN_ATOMIC16_STORE),
LOCK_RELEASE (SYNC_LOCK_RELEASE_4, TSAN_ATOMIC32_STORE),
LOCK_RELEASE (SYNC_LOCK_RELEASE_8, TSAN_ATOMIC64_STORE),
LOCK_RELEASE (SYNC_LOCK_RELEASE_16, TSAN_ATOMIC128_STORE)
};
/* Instrument an atomic builtin. */
static void
instrument_builtin_call (gimple_stmt_iterator *gsi)
{
gimple stmt = gsi_stmt (*gsi), g;
tree callee = gimple_call_fndecl (stmt), last_arg, args[6], t, lhs;
enum built_in_function fcode = DECL_FUNCTION_CODE (callee);
unsigned int i, num = gimple_call_num_args (stmt), j;
for (j = 0; j < 6 && j < num; j++)
args[j] = gimple_call_arg (stmt, j);
for (i = 0; i < ARRAY_SIZE (tsan_atomic_table); i++)
if (fcode != tsan_atomic_table[i].fcode)
continue;
else
{
tree decl = builtin_decl_implicit (tsan_atomic_table[i].tsan_fcode);
if (decl == NULL_TREE)
return;
switch (tsan_atomic_table[i].action)
{
case check_last:
case fetch_op:
last_arg = gimple_call_arg (stmt, num - 1);
if (!tree_fits_uhwi_p (last_arg)
|| tree_to_uhwi (last_arg) > MEMMODEL_SEQ_CST)
return;
gimple_call_set_fndecl (stmt, decl);
update_stmt (stmt);
if (tsan_atomic_table[i].action == fetch_op)
{
args[1] = gimple_call_arg (stmt, 1);
goto adjust_result;
}
return;
case add_seq_cst:
case add_acquire:
case fetch_op_seq_cst:
gcc_assert (num <= 2);
for (j = 0; j < num; j++)
args[j] = gimple_call_arg (stmt, j);
for (; j < 2; j++)
args[j] = NULL_TREE;
args[num] = build_int_cst (NULL_TREE,
tsan_atomic_table[i].action
!= add_acquire
? MEMMODEL_SEQ_CST
: MEMMODEL_ACQUIRE);
update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
stmt = gsi_stmt (*gsi);
if (tsan_atomic_table[i].action == fetch_op_seq_cst)
{
adjust_result:
lhs = gimple_call_lhs (stmt);
if (lhs == NULL_TREE)
return;
if (!useless_type_conversion_p (TREE_TYPE (lhs),
TREE_TYPE (args[1])))
{
tree var = make_ssa_name (TREE_TYPE (lhs));
g = gimple_build_assign (var, NOP_EXPR, args[1]);
gsi_insert_after (gsi, g, GSI_NEW_STMT);
args[1] = var;
}
gimple_call_set_lhs (stmt, make_ssa_name (TREE_TYPE (lhs)));
/* BIT_NOT_EXPR stands for NAND. */
if (tsan_atomic_table[i].code == BIT_NOT_EXPR)
{
tree var = make_ssa_name (TREE_TYPE (lhs));
g = gimple_build_assign (var, BIT_AND_EXPR,
gimple_call_lhs (stmt), args[1]);
gsi_insert_after (gsi, g, GSI_NEW_STMT);
g = gimple_build_assign (lhs, BIT_NOT_EXPR, var);
}
else
g = gimple_build_assign (lhs, tsan_atomic_table[i].code,
gimple_call_lhs (stmt), args[1]);
update_stmt (stmt);
gsi_insert_after (gsi, g, GSI_NEW_STMT);
}
return;
case weak_cas:
if (!integer_nonzerop (gimple_call_arg (stmt, 3)))
continue;
/* FALLTHRU */
case strong_cas:
gcc_assert (num == 6);
for (j = 0; j < 6; j++)
args[j] = gimple_call_arg (stmt, j);
if (!tree_fits_uhwi_p (args[4])
|| tree_to_uhwi (args[4]) > MEMMODEL_SEQ_CST)
return;
if (!tree_fits_uhwi_p (args[5])
|| tree_to_uhwi (args[5]) > MEMMODEL_SEQ_CST)
return;
update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
args[4], args[5]);
return;
case bool_cas:
case val_cas:
gcc_assert (num == 3);
for (j = 0; j < 3; j++)
args[j] = gimple_call_arg (stmt, j);
t = TYPE_ARG_TYPES (TREE_TYPE (decl));
t = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t)));
t = create_tmp_var (t);
mark_addressable (t);
if (!useless_type_conversion_p (TREE_TYPE (t),
TREE_TYPE (args[1])))
{
g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)),
NOP_EXPR, args[1]);
gsi_insert_before (gsi, g, GSI_SAME_STMT);
args[1] = gimple_assign_lhs (g);
}
g = gimple_build_assign (t, args[1]);
gsi_insert_before (gsi, g, GSI_SAME_STMT);
lhs = gimple_call_lhs (stmt);
update_gimple_call (gsi, decl, 5, args[0],
build_fold_addr_expr (t), args[2],
build_int_cst (NULL_TREE,
MEMMODEL_SEQ_CST),
build_int_cst (NULL_TREE,
MEMMODEL_SEQ_CST));
if (tsan_atomic_table[i].action == val_cas && lhs)
{
tree cond;
stmt = gsi_stmt (*gsi);
g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)), t);
gsi_insert_after (gsi, g, GSI_NEW_STMT);
t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt);
cond = build2 (NE_EXPR, boolean_type_node, t,
build_int_cst (TREE_TYPE (t), 0));
g = gimple_build_assign (lhs, COND_EXPR, cond, args[1],
gimple_assign_lhs (g));
gimple_call_set_lhs (stmt, t);
update_stmt (stmt);
gsi_insert_after (gsi, g, GSI_NEW_STMT);
}
return;
case lock_release:
gcc_assert (num == 1);
t = TYPE_ARG_TYPES (TREE_TYPE (decl));
t = TREE_VALUE (TREE_CHAIN (t));
update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
build_int_cst (t, 0),
build_int_cst (NULL_TREE,
MEMMODEL_RELEASE));
return;
default:
continue;
}
}
}
/* Instruments the gimple pointed to by GSI. Return
true if func entry/exit should be instrumented. */
static bool
instrument_gimple (gimple_stmt_iterator *gsi)
{
gimple stmt;
tree rhs, lhs;
bool instrumented = false;
stmt = gsi_stmt (*gsi);
if (is_gimple_call (stmt)
&& (gimple_call_fndecl (stmt)
!= builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
{
/* All functions with function call will have exit instrumented,
therefore no function calls other than __tsan_func_exit
shall appear in the functions. */
gimple_call_set_tail (as_a <gcall *> (stmt), false);
if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL))
instrument_builtin_call (gsi);
return true;
}
else if (is_gimple_assign (stmt)
&& !gimple_clobber_p (stmt))
{
if (gimple_store_p (stmt))
{
lhs = gimple_assign_lhs (stmt);
instrumented = instrument_expr (*gsi, lhs, true);
}
if (gimple_assign_load_p (stmt))
{
rhs = gimple_assign_rhs1 (stmt);
instrumented = instrument_expr (*gsi, rhs, false);
}
}
return instrumented;
}
/* Replace TSAN_FUNC_EXIT internal call with function exit tsan builtin. */
static void
replace_func_exit (gimple stmt)
{
tree builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
gimple g = gimple_build_call (builtin_decl, 0);
gimple_set_location (g, cfun->function_end_locus);
gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
gsi_replace (&gsi, g, true);
}
/* Instrument function exit. Used when TSAN_FUNC_EXIT does not exist. */
static void
instrument_func_exit (void)
{
location_t loc;
basic_block exit_bb;
gimple_stmt_iterator gsi;
gimple stmt, g;
tree builtin_decl;
edge e;
edge_iterator ei;
/* Find all function exits. */
exit_bb = EXIT_BLOCK_PTR_FOR_FN (cfun);
FOR_EACH_EDGE (e, ei, exit_bb->preds)
{
gsi = gsi_last_bb (e->src);
stmt = gsi_stmt (gsi);
gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
|| gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
loc = gimple_location (stmt);
builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
g = gimple_build_call (builtin_decl, 0);
gimple_set_location (g, loc);
gsi_insert_before (&gsi, g, GSI_SAME_STMT);
}
}
/* Instruments all interesting memory accesses in the current function.
Return true if func entry/exit should be instrumented. */
static bool
instrument_memory_accesses (void)
{
basic_block bb;
gimple_stmt_iterator gsi;
bool fentry_exit_instrument = false;
bool func_exit_seen = false;
auto_vec<gimple> tsan_func_exits;
FOR_EACH_BB_FN (bb, cfun)
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
{
gimple stmt = gsi_stmt (gsi);
if (is_gimple_call (stmt)
&& gimple_call_internal_p (stmt)
&& gimple_call_internal_fn (stmt) == IFN_TSAN_FUNC_EXIT)
{
if (fentry_exit_instrument)
replace_func_exit (stmt);
else
tsan_func_exits.safe_push (stmt);
func_exit_seen = true;
}
else
fentry_exit_instrument |= instrument_gimple (&gsi);
}
unsigned int i;
gimple stmt;
FOR_EACH_VEC_ELT (tsan_func_exits, i, stmt)
if (fentry_exit_instrument)
replace_func_exit (stmt);
else
{
gsi = gsi_for_stmt (stmt);
gsi_remove (&gsi, true);
}
if (fentry_exit_instrument && !func_exit_seen)
instrument_func_exit ();
return fentry_exit_instrument;
}
/* Instruments function entry. */
static void
instrument_func_entry (void)
{
tree ret_addr, builtin_decl;
gimple g;
gimple_seq seq = NULL;
builtin_decl = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
g = gimple_build_call (builtin_decl, 1, integer_zero_node);
ret_addr = make_ssa_name (ptr_type_node);
gimple_call_set_lhs (g, ret_addr);
gimple_set_location (g, cfun->function_start_locus);
gimple_seq_add_stmt_without_update (&seq, g);
builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY);
g = gimple_build_call (builtin_decl, 1, ret_addr);
gimple_set_location (g, cfun->function_start_locus);
gimple_seq_add_stmt_without_update (&seq, g);
edge e = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
gsi_insert_seq_on_edge_immediate (e, seq);
}
/* ThreadSanitizer instrumentation pass. */
static unsigned
tsan_pass (void)
{
initialize_sanitizer_builtins ();
if (instrument_memory_accesses ())
instrument_func_entry ();
return 0;
}
/* Inserts __tsan_init () into the list of CTORs. */
void
tsan_finish_file (void)
{
tree ctor_statements = NULL_TREE;
initialize_sanitizer_builtins ();
tree init_decl = builtin_decl_implicit (BUILT_IN_TSAN_INIT);
append_to_statement_list (build_call_expr (init_decl, 0),
&ctor_statements);
cgraph_build_static_cdtor ('I', ctor_statements,
MAX_RESERVED_INIT_PRIORITY - 1);
}
/* The pass descriptor. */
namespace {
const pass_data pass_data_tsan =
{
GIMPLE_PASS, /* type */
"tsan", /* name */
OPTGROUP_NONE, /* optinfo_flags */
TV_NONE, /* tv_id */
( PROP_ssa | PROP_cfg ), /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
TODO_update_ssa, /* todo_flags_finish */
};
class pass_tsan : public gimple_opt_pass
{
public:
pass_tsan (gcc::context *ctxt)
: gimple_opt_pass (pass_data_tsan, ctxt)
{}
/* opt_pass methods: */
opt_pass * clone () { return new pass_tsan (m_ctxt); }
virtual bool gate (function *)
{
return ((flag_sanitize & SANITIZE_THREAD) != 0
&& !lookup_attribute ("no_sanitize_thread",
DECL_ATTRIBUTES (current_function_decl)));
}
virtual unsigned int execute (function *) { return tsan_pass (); }
}; // class pass_tsan
} // anon namespace
gimple_opt_pass *
make_pass_tsan (gcc::context *ctxt)
{
return new pass_tsan (ctxt);
}
namespace {
const pass_data pass_data_tsan_O0 =
{
GIMPLE_PASS, /* type */
"tsan0", /* name */
OPTGROUP_NONE, /* optinfo_flags */
TV_NONE, /* tv_id */
( PROP_ssa | PROP_cfg ), /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
TODO_update_ssa, /* todo_flags_finish */
};
class pass_tsan_O0 : public gimple_opt_pass
{
public:
pass_tsan_O0 (gcc::context *ctxt)
: gimple_opt_pass (pass_data_tsan_O0, ctxt)
{}
/* opt_pass methods: */
virtual bool gate (function *)
{
return ((flag_sanitize & SANITIZE_THREAD) != 0 && !optimize
&& !lookup_attribute ("no_sanitize_thread",
DECL_ATTRIBUTES (current_function_decl)));
}
virtual unsigned int execute (function *) { return tsan_pass (); }
}; // class pass_tsan_O0
} // anon namespace
gimple_opt_pass *
make_pass_tsan_O0 (gcc::context *ctxt)
{
return new pass_tsan_O0 (ctxt);
}
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