[sanitizer] Check kArgVMax in SymbolizerProcess::GetArgV

compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp

@@ -281,6 +281,7 @@ class LLVMSymbolizerProcess final : public SymbolizerProcess {
     argv[i++] = inline_flag;
     argv[i++] = kSymbolizerArch;
     argv[i++] = nullptr;
+    CHECK_LE(i, kArgVMax);
   }
 };
 

compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_mac.cpp

@@ -91,6 +91,7 @@ class AtosSymbolizerProcess final : public SymbolizerProcess {
       argv[i++] = "-d";
     }
     argv[i++] = nullptr;
+    CHECK_LE(i, kArgVMax);
   }
 
   char pid_str_[16];

compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cpp

@@ -218,6 +218,7 @@ class Addr2LineProcess final : public SymbolizerProcess {
     argv[i++] = "-Cfe";
     argv[i++] = module_name_;
     argv[i++] = nullptr;
+    CHECK_LE(i, kArgVMax);
   }
 
   bool ReachedEndOfOutput(const char *buffer, uptr length) const override;