backtrace.log

[dan@alexandria perl6]$ LD_PRELOAD=./MoarVM/3rdparty/gmp/libgmp.so gdb --args ./install/bin/raku -e 'say 2⁴⁵⁵³⁵³⁵³⁴⁵³⁶⁴⁵³⁵³⁴⁵'
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Reading symbols from ./install/bin/raku...
(gdb) r
Starting program: /home/dan/Source/perl6/install/bin/raku -e say\ 2⁴⁵⁵³⁵³⁵³⁴⁵³⁶⁴⁵³⁵³⁴⁵
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7ffff6de5640 (LWP 133923)]
gmp: overflow in mpz type

Thread 1 "raku" received signal SIGABRT, Aborted.
0x00007ffff7474615 in raise () from /usr/lib/libc.so.6
(gdb) bt
#0  0x00007ffff7474615 in raise () from /usr/lib/libc.so.6
#1  0x00007ffff745d862 in abort () from /usr/lib/libc.so.6
#2  0x00007ffff7f651d5 in __gmpz_realloc (m=m@entry=0x55555819ac30, new_alloc=71148989771320869) at realloc.c:57
#3  0x00007ffff7f61f7f in __gmpz_n_pow_ui (r=r@entry=0x55555819ac30, bp=0x55555819ac10, bsize=1, e=0, e@entry=4553535345364535345) at n_pow_ui.c:339
#4  0x00007ffff7f62821 in __gmpz_pow_ui (r=r@entry=0x55555819ac30, b=b@entry=0x55555555d2e0, e=e@entry=4553535345364535345) at pow_ui.c:50
#5  0x00007ffff793fee4 in MVM_bigint_pow (tc=0x55555555a1a0, a=<optimized out>, b=<optimized out>, num_type=<optimized out>, int_type=0x5555574ed5f8) at src/math/bigintops.c:409
#6  0x00007ffff784e904 in MVM_interp_run (tc=0x2, initial_invoke=0x7fffffffd930, invoke_data=0x7fffffffd930, outer_runloop=0x7ffff7474615 <raise+325>) at src/core/interp.c:3518
#7  0x00005555555557c3 in main (argc=<optimized out>, argv=0x7fffffffe378) at src/vm/moar/runner/main.c:408
(gdb)

gmp.patch

diff --git src/core/threadcontext.c src/core/threadcontext.c
index a4faff5dd..c09aaaebe 100644
--- src/core/threadcontext.c
+++ src/core/threadcontext.c
@@ -1,6 +1,24 @@
 #include "moar.h"
 #include "platform/time.h"
 
+static __thread void *gmp_tc = NULL;
+
+void * MVM_gmp_malloc(size_t alloc_size) {
+    if (alloc_size > INT_MAX)
+        MVM_exception_throw_adhoc(gmp_tc, "Can't alloc a GMP bigint this big!");
+    else
+        return (void *)MVM_malloc(alloc_size);
+}
+void * MVM_gmp_realloc(void *ptr, size_t old_size, size_t new_size) {
+    if (new_size > INT_MAX)
+        MVM_exception_throw_adhoc(gmp_tc, "Can't realloc a GMP bigint this big!");
+    else
+        return (void *)MVM_realloc(ptr, new_size);
+}
+void MVM_gmp_free(void *ptr, size_t size) {
+    MVM_free(ptr);
+}
+
 /* Initializes a new thread context. Note that this doesn't set up a
  * thread itself, it just creates the data structure that exists in
  * MoarVM per thread. */
@@ -37,6 +55,8 @@ MVMThreadContext * MVM_tc_create(MVMThreadContext *parent, MVMInstance *instance
     /* Allocate an initial call stack region for the thread. */
     MVM_callstack_region_init(tc);
 
+    gmp_tc = tc;
+    mp_set_memory_functions(&MVM_gmp_malloc, &MVM_gmp_realloc, &MVM_gmp_free);
     /* Initialize random number generator state. */
     MVM_proc_seed(tc, (MVM_platform_now() / 10000) * MVM_proc_getpid(tc));