dump wasi parameters

Author: yamt

lib/host_instance.c

@@ -1,5 +1,6 @@
 #include <assert.h>
 #include <errno.h>
+#include <inttypes.h>
 #include <stdlib.h>
 
 #include "host_instance.h"
@@ -86,3 +87,30 @@ import_object_create_for_host_funcs(const struct host_module *modules,
         import_object_destroy(im);
         return ret;
 }
+
+void
+host_func_dump_params(const struct functype *ft, const struct cell *params)
+{
+        const struct resulttype *rt = &ft->parameter;
+        uint32_t i;
+        for (i = 0; i < rt->ntypes; i++) {
+                enum valtype type = rt->types[i];
+                uint32_t sz = valtype_cellsize(type);
+                struct val val;
+                val_from_cells(&val, &params[i], sz);
+#if defined(TOYWASM_USE_SMALL_CELLS)
+                switch (sz) {
+                case 1:
+                        xlog_trace("param[%" PRIu32 "] = %08" PRIu32, i,
+                                   val.u.i32);
+                        break;
+                case 2:
+                        xlog_trace("param[%" PRIu32 "] = %016" PRIu64, i,
+                                   val.u.i64);
+                        break;
+                }
+#else
+                xlog_trace("param[%" PRIu32 "] = %016" PRIu64, i, val.u.i64);
+#endif
+        }
+}

lib/host_instance.h

@@ -37,3 +37,6 @@ struct import_object;
 int import_object_create_for_host_funcs(const struct host_module *hm, size_t n,
                                         struct host_instance *hi,
                                         struct import_object **impp);
+
+void host_func_dump_params(const struct functype *ft,
+                           const struct cell *params);

lib/wasi_impl.h

@@ -8,6 +8,7 @@
 #define WASI_TRACE                                                            \
         do {                                                                  \
                 xlog_trace("WASI: %s called", __func__);                      \
+                host_func_dump_params(ft, params);                            \
         } while (0)
 #else
 #define WASI_TRACE                                                            \