Segfault in update_last_qword_type

[clesmian]

The attached file compiles cleanly with gcc, but leads to a segfault in c2m.

Input file

typedef struct {
  int data[111111111113];
} Boo;

void f (Boo b) {}

int main(){
}

ASAN Output

AddressSanitizer:DEADLYSIGNAL
=================================================================
==2524976==ERROR: AddressSanitizer: SEGV on unknown address 0x7f5fc1592240 (pc 0x55b3f2805b7a bp 0x6160000001d8 sp 0x7f6003df1c70 T1)
==2524976==The signal is caused by a READ memory access.
    #0 0x55b3f2805b79 in update_last_qword_type c2mir/x86_64/cx86_64-ABI-code.c:128
    #1 0x55b3f280f7c3 in process_aggregate_arg c2mir/x86_64/cx86_64-ABI-code.c:303
    #2 0x55b3f284bb29 in target_add_arg_proto c2mir/x86_64/cx86_64-ABI-code.c:361
    #3 0x55b3f284bb29 in collect_args_and_func_types c2mir/c2mir.c:10951
    #4 0x55b3f28a9e66 in gen c2mir/c2mir.c:12402
    #5 0x55b3f28a7465 in gen c2mir/c2mir.c:11628
    #6 0x55b3f28a7e4f in gen c2mir/c2mir.c:12489
    #7 0x55b3f28c1214 in top_gen c2mir/c2mir.c:10548
    #8 0x55b3f28c1214 in gen_mir c2mir/c2mir.c:12878
    #9 0x55b3f28c1214 in c2mir_compile c2mir/c2mir.c:13489
    #10 0x55b3f28c69b4 in compile c2mir/c2mir-driver.c:498
    #11 0x7f60073b1608 in start_thread /build/glibc-SzIz7B/glibc-2.31/nptl/pthread_create.c:477
    #12 0x7f60072d6132 in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x11f132)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV c2mir/x86_64/cx86_64-ABI-code.c:128 in update_last_qword_type
Thread T1 created by T0 here:
    #0 0x7f600755b815 in __interceptor_pthread_create ../../../../src/libsanitizer/asan/asan_interceptors.cc:208
    #1 0x55b3f27d8cbb in init_compilers c2mir/c2mir-driver.c:540
    #2 0x55b3f27d8cbb in main c2mir/c2mir-driver.c:656

==2524976==ABORTING

[vnmakarov]

I've fixed it by the recent patches.

[clesmian]

Fixed in d5d4336af700fd1401717dab6ec2c769e0e1f16d