Add linker interceptor script

linker_interceptor.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+import subprocess, json, sys, os
+
+FILTER = ['-shared']
+
+CXX = os.getenv('__LIBAFL_QEMU_BUILD_CXX') or 'c++'
+OUT = os.getenv('__LIBAFL_QEMU_BUILD_OUT') or 'linkinfo.json'
+
+args = sys.argv[1:]
+
+out_args = []
+shareds = []
+prev_o = False
+for i in range(len(args)):
+    if prev_o:
+        prev_o = False
+        continue
+    elif args[i] in FILTER:
+        continue
+    elif args[i].endswith('.so') and not args[i].startswith('-'):
+        shareds.append(args[i])
+        continue
+    elif args[i] == '-o':
+        prev_o = True
+        continue
+    elif args[i].startswith('-L') or args[i].startswith('-l'):
+        shareds.append(args[i])
+    out_args.append(args[i])
+
+with open(OUT, 'w') as f:
+    json.dump({'cmd': out_args, 'so': shareds}, f, indent=2)
+
+subprocess.run([CXX] + args)