https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97461
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> --- (In reply to Jan Hubicka from comment #7) > > No. The only thing we support is a recursive malloc as seen in: > > ./gcc/testsuite/gcc.dg/tree-prof/indir-call-prof-malloc.c > > > > It was added in g:bc2b1a232b1825b421a1aaa21a0865b2d1e4e08c as we use a > > statically allocated buffer when we recursively entry allocate_gcov_kvp. > > > > However this is different as we can't call malloc/calloc from the function > > as > > we're in code that initializes a memory allocator. > > > > We can mitigate the issue with a pair of new functions __gcov_supress_malloc > > and __gcov_alloc_malloc that will be called by a custom memory allocator. > > > > What do you think about it? > > How this works with the llvm implementation (that is very similar here, > right?) > > Honza They have the very same problem when I disable a statically pre-allocated buffers with -mllvm -vp-static-alloc=0: Program received signal SIGILL, Illegal instruction. 0x00000000004014e6 in calloc (nmemb=1, size=8) at pr97461.c:103 103 if (malloc_depth != 0) __builtin_trap(); (gdb) bt #0 0x00000000004014e6 in calloc (nmemb=1, size=8) at pr97461.c:103 #1 0x0000000000401ae1 in allocateValueProfileCounters (Data=0x40a2c8) at /home/marxin/Programming/llvm-project/compiler-rt/lib/profile/InstrProfilingValue.c:101 #2 0x0000000000401c45 in instrumentTargetValueImpl (CountValue=1, CounterIndex=0, Data=0x40a2c8, TargetValue=4199264) at /home/marxin/Programming/llvm-project/compiler-rt/lib/profile/InstrProfilingValue.c:146 #3 __llvm_profile_instrument_target (TargetValue=4199264, Data=0x40a2c8, CounterIndex=0) at /home/marxin/Programming/llvm-project/compiler-rt/lib/profile/InstrProfilingValue.c:232 #4 0x000000000040148f in malloc_impl (size=56) at pr97461.c:85 #5 0x00000000004013fe in malloc (size=56) at pr97461.c:95 #6 0x00007ffff7e048a3 in __add_to_environ (name=0x406138 "__LLVM_PROFILE_RT_INIT_ONCE", value=<optimized out>, combined=<optimized out>, replace=<optimized out>) at setenv.c:215 #7 0x0000000000402ce4 in truncateCurrentFile () #8 0x00000000004039bc in parseAndSetFilename () #9 0x0000000000404134 in __llvm_profile_initialize () #10 0x0000000000405e95 in __libc_csu_init (argc=argc@entry=1, argv=argv@entry=0x7fffffffdfa8, envp=0x7fffffffdfb8) at elf-init.c:89 #11 0x00007ffff7decd9a in __libc_start_main (main=0x401580 <main>, argc=1, argv=0x7fffffffdfa8, init=0x405e50 <__libc_csu_init>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffdf98) at ../csu/libc-start.c:270 #12 0x00000000004012aa in _start () at ../sysdeps/x86_64/start.S:120
