gcc/testsuite/lib/ubsan-dg.exp

   1 # Copyright (C) 2013-2020 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with GCC; see the file COPYING3.  If not see
  15 # <http://www.gnu.org/licenses/>.
  16
  17 # Return 1 if compilation with -fsanitize=undefined is error-free for trivial
  18 # code, 0 otherwise.
  19
  20 proc check_effective_target_fsanitize_undefined {} {
  21     return [check_runtime fsanitize_undefined {
  22         int main (void) { return 0; }
  23     } "-fsanitize=undefined"]
  24 }
  25
  26 #
  27 # ubsan_link_flags -- compute library path and flags to find libubsan.
  28 # (originally from g++.exp)
  29 #
  30
  31 proc ubsan_link_flags { paths } {
  32     global srcdir
  33     global ld_library_path
  34     global shlib_ext
  35     global ubsan_saved_library_path
  36
  37     set gccpath ${paths}
  38     set flags ""
  39
  40     set shlib_ext [get_shlib_extension]
  41     set ubsan_saved_library_path $ld_library_path
  42
  43     if { $gccpath != "" } {
  44       if { [file exists "${gccpath}/libsanitizer/ubsan/.libs/libubsan.a"]
  45            || [file exists "${gccpath}/libsanitizer/ubsan/.libs/libubsan.${shlib_ext}"] } {
  46           append flags " -B${gccpath}/libsanitizer/ "
  47           append flags " -B${gccpath}/libsanitizer/ubsan/ "
  48           append flags " -L${gccpath}/libsanitizer/ubsan/.libs"
  49           append ld_library_path ":${gccpath}/libsanitizer/ubsan/.libs"
  50           append ld_library_path ":${gccpath}/libstdc++-v3/src/.libs"
  51       }
  52     } else {
  53       global tool_root_dir
  54
  55       set libubsan [lookfor_file ${tool_root_dir} libubsan]
  56       if { $libubsan != "" } {
  57           append flags "-L${libubsan} "
  58           append ld_library_path ":${libubsan}"
  59       }
  60     }
  61
  62     set_ld_library_path_env_vars
  63
  64     return "$flags"
  65 }
  66
  67 #
  68 # ubsan_init -- called at the start of each subdir of tests
  69 #
  70
  71 proc ubsan_init { args } {
  72     global TEST_ALWAYS_FLAGS
  73     global ALWAYS_CXXFLAGS
  74     global TOOL_OPTIONS
  75     global ubsan_saved_TEST_ALWAYS_FLAGS
  76     global ubsan_saved_ALWAYS_CXXFLAGS
  77
  78     set link_flags ""
  79     if ![is_remote host] {
  80         if [info exists TOOL_OPTIONS] {
  81             set link_flags "[ubsan_link_flags [get_multilibs ${TOOL_OPTIONS}]]"
  82         } else {
  83             set link_flags "[ubsan_link_flags [get_multilibs]]"
  84         }
  85     }
  86
  87     if [info exists TEST_ALWAYS_FLAGS] {
  88         set ubsan_saved_TEST_ALWAYS_FLAGS $TEST_ALWAYS_FLAGS
  89     }
  90     if [info exists ALWAYS_CXXFLAGS] {
  91         set ubsan_saved_ALWAYS_CXXFLAGS $ALWAYS_CXXFLAGS
  92         set ALWAYS_CXXFLAGS [concat "{ldflags=$link_flags}" $ALWAYS_CXXFLAGS]
  93     } else {
  94         if [info exists TEST_ALWAYS_FLAGS] {
  95             set TEST_ALWAYS_FLAGS "$link_flags $TEST_ALWAYS_FLAGS"
  96         } else {
  97             set TEST_ALWAYS_FLAGS "$link_flags"
  98         }
  99     }
 100 }
 101
 102 #
 103 # ubsan_finish -- called at the end of each subdir of tests
 104 #
 105
 106 proc ubsan_finish { args } {
 107     global TEST_ALWAYS_FLAGS
 108     global ubsan_saved_TEST_ALWAYS_FLAGS
 109     global ubsan_saved_ALWAYS_CXXFLAGS
 110     global ubsan_saved_library_path
 111     global ld_library_path
 112
 113     if [info exists ubsan_saved_ALWAYS_CXXFLAGS ] {
 114         set ALWAYS_CXXFLAGS $ubsan_saved_ALWAYS_CXXFLAGS
 115     } else {
 116         if [info exists ubsan_saved_TEST_ALWAYS_FLAGS] {
 117             set TEST_ALWAYS_FLAGS $ubsan_saved_TEST_ALWAYS_FLAGS
 118         } else {
 119             unset TEST_ALWAYS_FLAGS
 120         }
 121     }
 122     set ld_library_path $ubsan_saved_library_path
 123     set_ld_library_path_env_vars
 124     clear_effective_target_cache
 125 }