Hi, Thanks for the report,
I will fix this in the coming days. On Sat, Jun 4, 2022 at 10:08 AM Vitaly Chikunov <v...@altlinux.org> wrote: > > Stephane, > > There is compile failure on GCC 12.1.1: > > pfmlib_perf_event_pmu.c: In function 'perf_table_alloc_event': > pfmlib_perf_event_pmu.c:293:47: error: pointer may be used after 'realloc' > [-Werror=use-after-free] > 293 | perf_pe_free = new_pe + (perf_pe_free - perf_pe); > | ^ > pfmlib_perf_event_pmu.c:289:18: note: call to 'realloc' here > 289 | new_pe = realloc(perf_pe, perf_pe_count * > sizeof(perf_event_t)); > | > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > In function 'perf_table_alloc_umask', > inlined from 'gen_tracepoint_table' at pfmlib_perf_event_pmu.c:457:10: > pfmlib_perf_event_pmu.c:329:47: error: pointer may be used after 'realloc' > [-Werror=use-after-free] > 329 | perf_um_free = new_um + (perf_um_free - perf_um); > | ^ > pfmlib_perf_event_pmu.c:325:18: note: call to 'realloc' here > 325 | new_um = realloc(perf_um, perf_um_count * sizeof(*new_um)); > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > cc1: all warnings being treated as errors > > Also, pointer arithmetic on unallocated region are, perhaps, undefined > behavior by C standard. So even though this math looks safe on x86 this > should be fixed anyway to be more portable. > > Thanks, > _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
