chore(makefile): investigate segmentation fault

Author: Daniele Briggi

.github/workflows/main.yml

@@ -152,10 +152,37 @@ jobs:
         if: matrix.name == 'macos'
         run: |
           echo "Checking if whisper CoreML symbols are present..."
-          nm -D dist/ai.dylib | grep -i coreml || echo "CoreML symbols not found in binary"
+          echo "=== Dynamic symbols in ai.dylib ==="
+          nm -D dist/ai.dylib | grep -i coreml || echo "CoreML symbols not found in dynamic symbol table"
+          echo "=== All symbols in ai.dylib ==="
+          nm dist/ai.dylib | grep -i coreml || echo "CoreML symbols not found in symbol table"
+          echo "=== Linked frameworks ==="
           otool -L dist/ai.dylib | grep CoreML || echo "CoreML framework not linked"
-          nm build/whisper.cpp/src/libwhisper.a | grep coreml
-          nm build/whisper.cpp/src/libwhisper.coreml.a | grep coreml
+          echo "=== CoreML symbols in whisper libraries ==="
+          nm build/whisper.cpp/src/libwhisper.a | grep coreml || echo "No CoreML symbols in libwhisper.a"
+          nm build/whisper.cpp/src/libwhisper.coreml.a | grep coreml || echo "No CoreML symbols in libwhisper.coreml.a"
+
+      - name: test sqlite-ai with crash debugging (macOS)
+        if: matrix.name == 'macos'
+        run: |
+          echo "=== Testing with crash debugging ==="
+          # Enable core dumps
+          ulimit -c unlimited
+          # Run with detailed crash info
+          echo "Running test with lldb to capture crash info..."
+          echo "run" | lldb -- sqlite3 ":memory:" -cmd ".bail on" ".load ./dist/ai" "SELECT ai_version();" || {
+            echo "Test failed, checking for core dump..."
+            if [ -f core.* ]; then
+              echo "Core dump found, analyzing..."
+              echo "bt" | lldb -c core.* sqlite3
+            fi
+            # Also try with crash reporter
+            echo "Checking system crash logs..."
+            log show --predicate 'eventMessage contains "sqlite3"' --info --last 1m || true
+          }
+          # Also try running the test directly to see if it works
+          echo "=== Direct test run ==="
+          sqlite3 ":memory:" -cmd ".bail on" ".load ./dist/ai" "SELECT ai_version();" || echo "Direct test also failed"
 
       - name: test sqlite-ai
         if: matrix.name == 'linux' || matrix.name == 'macos'

src/sqlite-ai.c

@@ -23,6 +23,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <signal.h>
+#include <setjmp.h>
+
 
 #ifndef SQLITE_CORE
 SQLITE_EXTENSION_INIT1
@@ -1947,7 +1950,37 @@ SQLITE_AI_API int sqlite3_ai_init (sqlite3 *db, char **pzErrMsg, const sqlite3_a
     // initialize the llama + ggml backend
     static bool once = false;
     if (once == false) {
+        // On macOS, llama_backend_init() can cause issues with CoreML initialization
+        // Add safety check to prevent crashes using signal handling
+        #ifdef __APPLE__
+        static jmp_buf crash_jmp;
+        static volatile sig_atomic_t crash_occurred = 0;
+        
+        void crash_handler(int sig) {
+            crash_occurred = 1;
+            longjmp(crash_jmp, 1);
+        }
+        
+        struct sigaction old_action;
+        struct sigaction new_action;
+        new_action.sa_handler = crash_handler;
+        sigemptyset(&new_action.sa_mask);
+        new_action.sa_flags = 0;
+        
+        sigaction(SIGSEGV, &new_action, &old_action);
+        
+        if (setjmp(crash_jmp) == 0) {
+            llama_backend_init();
+        } else {
+            sigaction(SIGSEGV, &old_action, NULL);
+            if (pzErrMsg) *pzErrMsg = sqlite3_mprintf("Failed to initialize LLAMA backend: segmentation fault occurred");
+            return SQLITE_ERROR;
+        }
+        
+        sigaction(SIGSEGV, &old_action, NULL);
+        #else
         llama_backend_init();
+        #endif
         once = true;
     }