Yesterday I tried unsuccessfully to build gem5 with ASAN. Am I doing something wrong? olumide@openbmc-build:~/repos/gem5$ scons gem5_opt/gem5.debug -j4 --with-ubsan --with-asan scons: Reading SConscript files ... Mkdir("/home/olumide/repos/gem5/gem5_debug/gem5.build") Checking for linker -Wl,--as-needed support... (cached) yes Warning: Address Sanitizer is not supported with GCC. This option will be ignored. Checking for compiler -gz support... (cached) yes ... scons: Building targets ... [ PROTOC] src/proto/inst_dep_record.proto -> gem5_opt/proto/inst_dep_record.pb.cc, gem5_opt/proto/inst_dep_record.pb.h [ PROTOC] src/proto/packet.proto -> gem5_opt/proto/packet.pb.cc, gem5_opt/proto/packet.pb.h [ PROTOC] src/proto/inst.proto -> gem5_opt/proto/inst.pb.cc, gem5_opt/proto/inst.pb.h [ CXX] src/proto/protobuf.cc -> gem5_opt/proto/protobuf.o [ CXX] gem5_opt/proto/inst_dep_record.pb.cc -> .o [ CXX] gem5_opt/proto/packet.pb.cc -> .o [ CXX] gem5_opt/proto/inst.pb.cc -> .o [CONFIG H] HAVE_DEPRECATED_NAMESPACE, 1 -> gem5_opt/config/have_deprecated_namespace.hh [ CXX] src/proto/protoio.cc -> gem5_opt/proto/protoio.o gem5_opt/proto/inst.pb.cc: In copy constructor ‘ProtoMessage::Inst_MemAccess::Inst_MemAccess(const ProtoMessage::Inst_MemAccess&)’: gem5_opt/proto/inst.pb.cc:657:11: error: writing 16 bytes into a region of size 8 [-Werror=stringop-overflow=] 657 | ::memcpy(&addr_, &from.addr_, | ^ In file included from gem5_opt/proto/inst.pb.cc:4: gem5_opt/proto/inst.pb.h:521:35: note: destination object ‘ProtoMessage::Inst_MemAccess::addr_’ of size 8 521 | ::PROTOBUF_NAMESPACE_ID::uint64 addr_; | ^~~~~ [ CXX] src/python/gem5py.cc -> gem5_opt/python/gem5py.pyo gem5_opt/proto/inst_dep_record.pb.cc: In copy constructor ‘ProtoMessage::InstDepRecordHeader::InstDepRecordHeader(const ProtoMessage::InstDepRecordHeader&)’: gem5_opt/proto/inst_dep_record.pb.cc:209:11: error: writing 16 bytes into a region of size 8 [-Werror=stringop-overflow=] 209 | ::memcpy(&tick_freq_, &from.tick_freq_, | ^ In file included from gem5_opt/proto/inst_dep_record.pb.cc:4: gem5_opt/proto/inst_dep_record.pb.h:305:35: note: destination object ‘ProtoMessage::InstDepRecordHeader::tick_freq_’ of size 8 305 | ::PROTOBUF_NAMESPACE_ID::uint64 tick_freq_; | ^~~~~~~~~~ cc1plus: all warnings being treated as errors scons: *** [gem5_opt/proto/inst_dep_record.pb.o] Error 1 cc1plus: all warnings being treated as errors scons: *** [gem5_opt/proto/inst.pb.o] Error 1 scons: building terminated because of errors.

While trying to debug my code I passed the -Wall option to the compiler and got the following truncated wall of errors. [ CXX] src/kern/linux/printk.cc -> gem5_debug/kern/linux/printk.do In file included from src/base/statistics.hh:84, from src/sim/process.hh:41, from src/kern/linux/linux.hh:49, from src/kern/linux/linux.cc:29: src/base/stats/storage.hh: In member function ‘void gem5::statistics::HistStor::prepare(const gem5::statistics::StorageParams*, gem5::statistics::DistData&)’: src/base/stats/storage.hh:524:32: error: comparison of integer expressions of different signedness: ‘gem5::statistics::off_type’ {aka ‘unsigned int’} and ‘int’ [-Werror=sign-compare] 524 | for (off_type i = 0; i < buckets; ++i) | ~~^~~~~~~~~ In file included from src/kern/linux/printk.hh:34, from src/kern/linux/printk.cc:29: src/base/addr_range.hh: In instantiation of ‘gem5::AddrRange::AddrRange(Dummy, Iterator, Iterator) [with Iterator = __gnu_cxx::__normal_iterator<gem5::AddrRange*, std::vector<gem5::AddrRange> >]’: src/base/addr_range.hh:271:58: required from here src/base/addr_range.hh:123:28: error: comparison of integer expressions of different signedness: ‘long int’ and ‘long long unsigned int’ [-Werror=sign-compare] 123 | fatal_if(count != (1ULL << masks.size()), | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ src/base/compiler.hh:81:51: note: in definition of macro ‘GEM5_UNLIKELY’ 81 | # define GEM5_UNLIKELY(cond) __builtin_expect(!!(cond), 0) | ^~~~ src/base/addr_range.hh:123:13: note: in expansion of macro ‘fatal_if’ 123 | fatal_if(count != (1ULL << masks.size()), | ^~~~~~~~ src/base/addr_range.hh: In instantiation of ‘gem5::AddrRange::AddrRange(Dummy, Iterator, Iterator) [with Iterator = std::_List_iterator<gem5::AddrRange>]’: src/base/addr_range.hh:274:58: required from here src/base/addr_range.hh:123:28: error: comparison of integer expressions of different signedness: ‘long int’ and ‘long long unsigned int’ [-Werror=sign-compare] 123 | fatal_if(count != (1ULL << masks.size()), | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ src/base/compiler.hh:81:51: note: in definition of macro ‘GEM5_UNLIKELY’ 81 | # define GEM5_UNLIKELY(cond) __builtin_expect(!!(cond), 0) | ^~~~ src/base/addr_range.hh:123:13: note: in expansion of macro ‘fatal_if’ 123 | fatal_if(count != (1ULL << masks.size()), | ^~~~~~~~ In file included from src/base/statistics.hh:84, from src/cpu/base.hh:49, from src/kern/linux/events.cc:47: src/base/stats/storage.hh: In member function ‘void gem5::statistics::HistStor::prepare(const gem5::statistics::StorageParams*, gem5::statistics::DistData&)’: src/base/stats/storage.hh:524:32: error: comparison of integer expressions of different signedness: ‘gem5::statistics::off_type’ {aka ‘unsigned int’} and ‘int’ [-Werror=sign-compare] 524 | for (off_type i = 0; i < buckets; ++i) | ~~^~~~~~~~~ In file included from src/base/statistics.hh:84, from src/sim/system.hh:53, from src/kern/linux/helpers.cc:69: src/base/stats/storage.hh: In member function ‘void gem5::statistics::HistStor::prepare(const gem5::statistics::StorageParams*, gem5::statistics::DistData&)’: src/base/stats/storage.hh:524:32: error: comparison of integer expressions of different signedness: ‘gem5::statistics::off_type’ {aka ‘unsigned int’} and ‘int’ [-Werror=sign-compare] 524 | for (off_type i = 0; i < buckets; ++i) ... On 18/04/2025 20:33, Olumide wrote: > Yesterday I tried unsuccessfully to build gem5 with ASAN. Am I doing > something wrong? > > olumide@openbmc-build:~/repos/gem5$ scons gem5_opt/gem5.debug -j4 -- > with-ubsan --with-asan > scons: Reading SConscript files ... > Mkdir("/home/olumide/repos/gem5/gem5_debug/gem5.build") > Checking for linker -Wl,--as-needed support... (cached) yes > Warning: Address Sanitizer is not supported with GCC. This option will > be ignored. > Checking for compiler -gz support... (cached) yes > ... > scons: Building targets ... > > [  PROTOC] src/proto/inst_dep_record.proto -> gem5_opt/proto/ > inst_dep_record.pb.cc, gem5_opt/proto/inst_dep_record.pb.h > [  PROTOC] src/proto/packet.proto -> gem5_opt/proto/packet.pb.cc, > gem5_opt/proto/packet.pb.h > [  PROTOC] src/proto/inst.proto -> gem5_opt/proto/inst.pb.cc, gem5_opt/ > proto/inst.pb.h > [     CXX] src/proto/protobuf.cc -> gem5_opt/proto/protobuf.o > [     CXX] gem5_opt/proto/inst_dep_record.pb.cc -> .o > [     CXX] gem5_opt/proto/packet.pb.cc -> .o > [     CXX] gem5_opt/proto/inst.pb.cc -> .o > [CONFIG H] HAVE_DEPRECATED_NAMESPACE, 1 -> gem5_opt/config/ > have_deprecated_namespace.hh > [     CXX] src/proto/protoio.cc -> gem5_opt/proto/protoio.o > gem5_opt/proto/inst.pb.cc: In copy constructor > ‘ProtoMessage::Inst_MemAccess::Inst_MemAccess(const > ProtoMessage::Inst_MemAccess&)’: > gem5_opt/proto/inst.pb.cc:657:11: error: writing 16 bytes into a region > of size 8 [-Werror=stringop-overflow=] >   657 |   ::memcpy(&addr_, &from.addr_, >       |           ^ > In file included from gem5_opt/proto/inst.pb.cc:4: > gem5_opt/proto/inst.pb.h:521:35: note: destination object > ‘ProtoMessage::Inst_MemAccess::addr_’ of size 8 >   521 |   ::PROTOBUF_NAMESPACE_ID::uint64 addr_; >       |                                   ^~~~~ > [     CXX] src/python/gem5py.cc -> gem5_opt/python/gem5py.pyo > gem5_opt/proto/inst_dep_record.pb.cc: In copy constructor > ‘ProtoMessage::InstDepRecordHeader::InstDepRecordHeader(const > ProtoMessage::InstDepRecordHeader&)’: > gem5_opt/proto/inst_dep_record.pb.cc:209:11: error: writing 16 bytes > into a region of size 8 [-Werror=stringop-overflow=] >   209 |   ::memcpy(&tick_freq_, &from.tick_freq_, >       |           ^ > In file included from gem5_opt/proto/inst_dep_record.pb.cc:4: > gem5_opt/proto/inst_dep_record.pb.h:305:35: note: destination object > ‘ProtoMessage::InstDepRecordHeader::tick_freq_’ of size 8 >   305 |   ::PROTOBUF_NAMESPACE_ID::uint64 tick_freq_; >       |                                   ^~~~~~~~~~ > cc1plus: all warnings being treated as errors > scons: *** [gem5_opt/proto/inst_dep_record.pb.o] Error 1 > cc1plus: all warnings being treated as errors > scons: *** [gem5_opt/proto/inst.pb.o] Error 1 > scons: building terminated because of errors.