| /* GCC instrumentation plugin for ThreadSanitizer. |
| Copyright (C) 2011-2017 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 "backend.h" |
| #include "rtl.h" |
| #include "tree.h" |
| #include "memmodel.h" |
| #include "gimple.h" |
| #include "tree-pass.h" |
| #include "ssa.h" |
| #include "cgraph.h" |
| #include "fold-const.h" |
| #include "gimplify.h" |
| #include "gimple-iterator.h" |
| #include "gimplify-me.h" |
| #include "tree-cfg.h" |
| #include "tree-iterator.h" |
| #include "tree-ssa-propagate.h" |
| #include "tree-ssa-loop-ivopts.h" |
| #include "tree-eh.h" |
| #include "tsan.h" |
| #include "stringpool.h" |
| #include "attribs.h" |
| #include "asan.h" |
| #include "builtins.h" |
| #include "target.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 unsignedp, reversep, volatilep = 0; |
| base = get_inner_reference (expr, &bitsize, &bitpos, &offset, &mode, |
| &unsignedp, &reversep, &volatilep); |
| |
| /* 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) || (VAR_P (base) && 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 = least_bit_hwi (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, |
| bool_clear, bool_test_and_set |
| }; |
| |
| /* 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) |
| #define BOOL_CLEAR(fcode, tsan_fcode) \ |
| TRANSFORM (fcode, tsan_fcode, bool_clear, ERROR_MARK) |
| #define BOOL_TEST_AND_SET(fcode, tsan_fcode) \ |
| TRANSFORM (fcode, tsan_fcode, bool_test_and_set, ERROR_MARK) |
| |
| 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), |
| |
| BOOL_CLEAR (ATOMIC_CLEAR, TSAN_ATOMIC8_STORE), |
| |
| BOOL_TEST_AND_SET (ATOMIC_TEST_AND_SET, TSAN_ATOMIC8_EXCHANGE) |
| }; |
| |
| /* 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) |
| && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST) |
| return; |
| gimple_call_set_fndecl (stmt, decl); |
| update_stmt (stmt); |
| maybe_clean_eh_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]); |
| maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi)); |
| 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]) |
| && memmodel_base (tree_to_uhwi (args[4])) >= MEMMODEL_LAST) |
| return; |
| if (tree_fits_uhwi_p (args[5]) |
| && memmodel_base (tree_to_uhwi (args[5])) >= MEMMODEL_LAST) |
| return; |
| update_gimple_call (gsi, decl, 5, args[0], args[1], args[2], |
| args[4], args[5]); |
| maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi)); |
| 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)); |
| maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi)); |
| 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)); |
| maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi)); |
| return; |
| case bool_clear: |
| case bool_test_and_set: |
| if (BOOL_TYPE_SIZE != 8) |
| { |
| decl = NULL_TREE; |
| for (j = 1; j < 5; j++) |
| if (BOOL_TYPE_SIZE == (8 << j)) |
| { |
| enum built_in_function tsan_fcode |
| = (enum built_in_function) |
| (tsan_atomic_table[i].tsan_fcode + j); |
| decl = builtin_decl_implicit (tsan_fcode); |
| break; |
| } |
| if (decl == NULL_TREE) |
| return; |
| } |
| last_arg = gimple_call_arg (stmt, num - 1); |
| if (tree_fits_uhwi_p (last_arg) |
| && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST) |
| return; |
| t = TYPE_ARG_TYPES (TREE_TYPE (decl)); |
| t = TREE_VALUE (TREE_CHAIN (t)); |
| if (tsan_atomic_table[i].action == bool_clear) |
| { |
| update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0), |
| build_int_cst (t, 0), last_arg); |
| maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi)); |
| return; |
| } |
| t = build_int_cst (t, targetm.atomic_test_and_set_trueval); |
| update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0), |
| t, last_arg); |
| maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi)); |
| stmt = gsi_stmt (*gsi); |
| lhs = gimple_call_lhs (stmt); |
| if (lhs == NULL_TREE) |
| return; |
| if (targetm.atomic_test_and_set_trueval != 1 |
| || !useless_type_conversion_p (TREE_TYPE (lhs), |
| TREE_TYPE (t))) |
| { |
| tree new_lhs = make_ssa_name (TREE_TYPE (t)); |
| gimple_call_set_lhs (stmt, new_lhs); |
| if (targetm.atomic_test_and_set_trueval != 1) |
| g = gimple_build_assign (lhs, NE_EXPR, new_lhs, |
| build_int_cst (TREE_TYPE (t), 0)); |
| else |
| g = gimple_build_assign (lhs, NOP_EXPR, new_lhs); |
| gsi_insert_after (gsi, g, GSI_NEW_STMT); |
| update_stmt (stmt); |
| } |
| 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 (bool *cfg_changed) |
| { |
| 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 (gimple_call_internal_p (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); |
| } |
| if (gimple_purge_dead_eh_edges (bb)) |
| *cfg_changed = true; |
| } |
| 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 (); |
| bool cfg_changed = false; |
| if (instrument_memory_accesses (&cfg_changed)) |
| instrument_func_entry (); |
| return cfg_changed ? TODO_cleanup_cfg : 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 sanitize_flags_p (SANITIZE_THREAD); |
| } |
| |
| 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 (sanitize_flags_p (SANITIZE_THREAD) && !optimize); |
| } |
| |
| 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); |
| } |