https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114398
Bug ID: 114398 Summary: Unexpected storage error when "executing" return statement. Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: ada Assignee: unassigned at gcc dot gnu.org Reporter: d.van.raaij at gmail dot com CC: dkm at gcc dot gnu.org Target Milestone: --- Created attachment 57741 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57741&action=edit Reproducer The program included in this report generates an unexpected storage error (SIGSEGV) when the return statement on line 37 is being "executed". The issue seems to be a regression in GCC 14.0.1 (20240228). A quick analysis using rr hints at an invalid value of "_init" in the expanded code: (rr) list 244 procedure reproducer__pkg__intIP (_init : out 245 reproducer__pkg__int; P60b : natural := 0; _init_level : 246 natural := 0) is 247 begin 248 if P60b = 0 then 249 _init._tag := pkg__intP; <<<<< Error occurs here. 250 end if; 251 if P60b /= 3 then 252 $ada__finalization__limited_controlledIP (_init._parent, 253 1); (rr) p/x _init $1 = <error reading variable: Cannot access memory at address 0x17fffffff> The invalid memory address seems to come from a hidden argument of the "+" operator function named "OaddBIPaccess": (rr) frame #0 reproducer.pkg."+" (left=..., right=..., <OaddBIPalloc>=0, <OaddBIPstoragepool>=0x0, <OaddBIPfinalizationmaster>=0x7fffc9c35df0, <OaddBIPtaskmaster>=-909943160, <OaddBIPactivationchain>=0x7f1d6258d340 <ada.strings.pattern_error>, <OaddBIPaccess>=0x17fffffff) at /home/dvraaij/gnat14_bip_issue/reproducer.adb.dg:385 385 function reproducer__pkg__Oadd (left : reproducer__pkg__int; *** Compilation *** $ gnatmake -f reproducer.adb -cargs -O0 -g -gnatDGL -bargs -Es gcc -c -O0 -g -gnatDGL reproducer.adb gnatbind -Es -x reproducer.ali gnatlink reproducer.ali *** Program output *** $ ./reproducer raised STORAGE_ERROR : stack overflow or erroneous memory access [/lib64/libgnat-14.so] 0x7f441f1d805f [/lib64/libc.so.6] 0x7f441ecaf70e [./reproducer] 0x404b95 reproducer__pkg__intIP.12 at reproducer.adb.dg:249 0x4047eb reproducer__pkg__Oadd.5 at reproducer.adb.dg:579 0x404df9 reproducer__test.15 at reproducer.adb.dg:733 0x404478 _ada_reproducer at reproducer.adb.dg:855 0x403bf7 Main at b~reproducer.adb:254 [/lib64/libc.so.6] 0x7f441ec99086 0x7f441ec99149 [./reproducer] 0x403633 _start at ??? 0xfffffffffffffffe raised PROGRAM_ERROR : reproducer.adb.dg:571 finalize/adjust raised exception [./reproducer] 0x404af0 reproducer__pkg__Oadd__R80b___finalizer.8 at reproducer.adb.dg:571 0x404894 reproducer__pkg__Oadd.5 at reproducer.adb.dg:600 0x404df9 reproducer__test.15 at reproducer.adb.dg:733 0x404478 _ada_reproducer at reproducer.adb.dg:855 0x403bf7 Main at b~reproducer.adb:254 [/lib64/libc.so.6] 0x7f441ec99086 0x7f441ec99149 [./reproducer] 0x403633 _start at ??? 0xfffffffffffffffe *** Compiler version *** $ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/14/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-redhat-linux Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,m2,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --enable-libstdcxx-backtrace --with-libstdcxx-zoneinfo=/usr/share/zoneinfo --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl=/builddir/build/BUILD/gcc-14.0.1-20240228/obj-x86_64-redhat-linux/isl-install --enable-offload-targets=nvptx-none,amdgcn-amdhsa --enable-offload-defaulted --without-cuda-driver --enable-gnu-indirect-function --enable-cet --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux --with-build-config=bootstrap-lto --enable-link-serialization=1 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 14.0.1 20240228 (Red Hat 14.0.1-0) (GCC)