Expose NaClAppSetDesc() to Chromium for use at startup

src/trusted/service_runtime/sel_ldr.c

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <string.h>
 
 /*
  * NaCl Simple/secure ELF loader (NaCl SEL).
  */
 #include "native_client/src/include/portability.h"
 #include "native_client/src/include/portability_io.h"
 #include "native_client/src/include/portability_string.h"
 #include "native_client/src/include/nacl_macros.h"
 
 #include "native_client/src/public/desc_metadata_types.h"
+#include "native_client/src/public/nacl_app.h"
 #include "native_client/src/public/secure_service.h"
 
 #include "native_client/src/shared/gio/gio.h"
 #include "native_client/src/shared/platform/nacl_check.h"
 #include "native_client/src/shared/platform/nacl_exit.h"
 #include "native_client/src/shared/platform/nacl_log.h"
 #include "native_client/src/shared/platform/nacl_sync.h"
 #include "native_client/src/shared/platform/nacl_sync_checked.h"
 #include "native_client/src/shared/platform/nacl_time.h"
 #include "native_client/src/shared/srpc/nacl_srpc.h"
@@ skipping 43 matching lines @@
 }
 
 static int ShouldEnableDynamicLoading(void) {
   return !IsEnvironmentVariableSet("NACL_DISABLE_DYNAMIC_LOADING");
 }
 
 int NaClAppWithSyscallTableCtor(struct NaClApp               *nap,
                                 struct NaClSyscallTableEntry *table) {
   struct NaClDescEffectorLdr  *effp;
 
+  /* Zero-initialize in case we miss any fields below. */
+  memset(nap, 0, sizeof(*nap));
+
   /* The validation cache will be injected later, if it exists. */
   nap->validation_cache = NULL;
 
   nap->validator = NaClCreateValidator();
 
   /* Get the set of features that the CPU we're running on supports. */
   /* These may be adjusted later in sel_main.c for fixed-feature CPU mode. */
   nap->cpu_features = (NaClCPUFeatures *) malloc(
       nap->validator->CPUFeatureSize);
   if (NULL == nap->cpu_features) {
@@ skipping 235 matching lines @@
  cleanup_cpu_features:
   free(nap->cpu_features);
  cleanup_none:
   return 0;
 }
 
 int NaClAppCtor(struct NaClApp *nap) {
   return NaClAppWithSyscallTableCtor(nap, nacl_syscall);
 }
 
+struct NaClApp *NaClAppCreate(void) {
+  struct NaClApp *nap = malloc(sizeof(struct NaClApp));
+  if (nap == NULL)
+    NaClLog(LOG_FATAL, "Failed to allocate NaClApp\n");
+  if (!NaClAppCtor(nap))
+    NaClLog(LOG_FATAL, "NaClAppCtor() failed\n");
+  return nap;
+}
+
 /*
  * unaligned little-endian load.  precondition: nbytes should never be
  * more than 8.
  */
 static uint64_t NaClLoadMem(uintptr_t addr,
                             size_t    user_nbytes) {
   uint64_t      value = 0;
 
   CHECK(0 != user_nbytes && user_nbytes <= 8);
 
@@ skipping 978 matching lines @@
   nacl_global_xlate_base = mem_start;
 
   NaClSandboxMemoryStartForValgrind(mem_start);
 
   _ovly_debug_event();
 }
 
 void NaClGdbHook(struct NaClApp const *nap) {
   StopForDebuggerInit(nap->mem_start);
 }