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| author | Michel Dänzer <[email protected]> | 2019-09-25 11:44:24 +0200 |
|---|---|---|
| committer | Michel Dänzer <[email protected]> | 2019-10-24 16:21:01 +0200 |
| commit | 69420c28bdc8b7100252bf167475ab2ff29f7693 (patch) | |
| tree | 62caedf86addecedae20a61d95b204d09f2df254 /src/util/tests | |
| parent | 65e376a7218ca05e89baca8a845ece9abf54735e (diff) | |
util: Use uint64_t for shifting left in sign_extend and strunc
Shifting int64_t values left into the sign bit has undefined behaviour:
../src/util/fast_idiv_by_const.c:175:14: runtime error: left shift of 131 by 56 places cannot be represented in type 'long int'
#0 0x561337ed10c1 in sign_extend ../src/util/fast_idiv_by_const.c:175
#1 0x561337ed1335 in util_compute_fast_sdiv_info ../src/util/fast_idiv_by_const.c:239
#2 0x561337e17519 in fast_idiv_by_const_int8_Test::TestBody() ../src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp:357
#3 0x561337ea815d in void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) ../src/gtest/src/gtest.cc:2402
#4 0x561337e93a6b in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) ../src/gtest/src/gtest.cc:2438
#5 0x561337e38e75 in testing::Test::Run() ../src/gtest/src/gtest.cc:2474
#6 0x561337e3b54e in testing::TestInfo::Run() ../src/gtest/src/gtest.cc:2656
#7 0x561337e3dcdc in testing::TestCase::Run() ../src/gtest/src/gtest.cc:2774
#8 0x561337e596b6 in testing::internal::UnitTestImpl::RunAllTests() ../src/gtest/src/gtest.cc:4649
#9 0x561337eabd76 in bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) ../src/gtest/src/gtest.cc:2402
#10 0x561337e97443 in bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) ../src/gtest/src/gtest.cc:2438
#11 0x561337e50cd8 in testing::UnitTest::Run() ../src/gtest/src/gtest.cc:4257
#12 0x561337ed0b91 in RUN_ALL_TESTS() ../src/gtest/include/gtest/gtest.h:2233
#13 0x561337ed0a51 in main ../src/gtest/src/gtest_main.cc:37
#14 0x7f85ba483bba in __libc_start_main ../csu/libc-start.c:308
#15 0x561337e14dc9 in _start (/home/daenzer/src/mesa-git/mesa/build-amd64-sanitize/src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test+0x96dc9)
../src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp:51:14: runtime error: left shift of negative value -63
#0 0x55fc3c0e67cc in strunc ../src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp:51
#1 0x55fc3c0e6d93 in smul_high ../src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp:140
#2 0x55fc3c0e7067 in fast_sdiv ../src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp:181
#3 0x55fc3c0e858b in fast_idiv_by_const_int8_Test::TestBody() ../src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp:358
#4 0x55fc3c17915d in void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) ../src/gtest/src/gtest.cc:2402
#5 0x55fc3c164a6b in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) ../src/gtest/src/gtest.cc:2438
#6 0x55fc3c109e75 in testing::Test::Run() ../src/gtest/src/gtest.cc:2474
#7 0x55fc3c10c54e in testing::TestInfo::Run() ../src/gtest/src/gtest.cc:2656
#8 0x55fc3c10ecdc in testing::TestCase::Run() ../src/gtest/src/gtest.cc:2774
#9 0x55fc3c12a6b6 in testing::internal::UnitTestImpl::RunAllTests() ../src/gtest/src/gtest.cc:4649
#10 0x55fc3c17cd76 in bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) ../src/gtest/src/gtest.cc:2402
#11 0x55fc3c168443 in bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) ../src/gtest/src/gtest.cc:2438
#12 0x55fc3c121cd8 in testing::UnitTest::Run() ../src/gtest/src/gtest.cc:4257
#13 0x55fc3c1a1b91 in RUN_ALL_TESTS() ../src/gtest/include/gtest/gtest.h:2233
#14 0x55fc3c1a1a51 in main ../src/gtest/src/gtest_main.cc:37
#15 0x7fd224759bba in __libc_start_main ../csu/libc-start.c:308
#16 0x55fc3c0e5dc9 in _start (/home/daenzer/src/mesa-git/mesa/build-amd64-sanitize/src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test+0x96dc9)
v2:
* Use two casts instead of changing the argument type (Jason Ekstrand)
Reviewed-by: Jason Ekstrand <[email protected]>
Reviewed-by: Adam Jackson <[email protected]>
Diffstat (limited to 'src/util/tests')
| -rw-r--r-- | src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp b/src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp index b0b3669e73b..222346230e4 100644 --- a/src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp +++ b/src/util/tests/fast_idiv_by_const/fast_idiv_by_const_test.cpp @@ -48,7 +48,7 @@ strunc(int64_t x, unsigned num_bits) if (num_bits == 64) return x; - return (x << (64 - num_bits)) >> (64 - num_bits); + return (int64_t)((uint64_t)x << (64 - num_bits)) >> (64 - num_bits); } static inline bool |