[Bug driver/119727] New: -freport-bug vs. ASLR

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119727

            Bug ID: 119727
           Summary: -freport-bug vs. ASLR
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
  Target Milestone: ---

ASLR breaks -freport-bug.
E.g. in --enable-host-pie configured gcc trying to reproduce PR116747 ICE, I
see
./xgcc -B ./ -S -fno-tree-fre -fno-tree-dse -O3 pr116747.c -freport-bug
during GIMPLE pass: cselim
pr116747.c: In function ‘f’:
pr116747.c:3:5: internal compiler error: Segmentation fault
    3 | int f(int a, int b, int c)
      |     ^
0x55c57269b711 internal_error(char const*, ...)
        ../../gcc/diagnostic-global-context.cc:517
0x55c5711dde03 crash_signal
        ../../gcc/toplev.cc:322
0x55c570e29d27 phi_nodes_ptr(basic_block_def*)
        ../../gcc/gimple.h:4705
0x55c570e29d27 gsi_start_phis(basic_block_def*)
        ../../gcc/gimple-iterator.cc:937
0x55c570e29d27 gsi_for_stmt(gimple*)
        ../../gcc/gimple-iterator.cc:621
0x55c5713ccd65 cond_if_else_store_replacement_1
        ../../gcc/tree-ssa-phiopt.cc:3691
0x55c5713d42c7 cond_if_else_store_replacement
        ../../gcc/tree-ssa-phiopt.cc:3953
0x55c5713d42c7 operator()
        ../../gcc/tree-ssa-phiopt.cc:4682
0x55c5713d42c7 execute_over_cond_phis<(anonymous
namespace)::pass_cselim::execute(function*)::<lambda(basic_block, basic_block,
basic_block, edge, edge, bool, gcond*)> >
        ../../gcc/tree-ssa-phiopt.cc:4235
0x55c5713d42c7 execute
        ../../gcc/tree-ssa-phiopt.cc:4702
Please submit a full bug report, with preprocessed source.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
The bug is not reproducible, so it is likely a hardware or OS problem.

The ICE is actually reproduceable, but -freport-bug doesn't prepare
preprocessed output, because the hexadecimal addresses at the start of the
lines from libbacktrace differ between different iterations.  Even for non-PIE
cc1/cc1plus there could be libc addresses in the backtrace (say if there is a
SIGSEGV inside of strlen/memcpy or other library function).