1 // Copyright 2012 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifdef UNSAFE_BUFFERS_BUILD
6 // TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
7 #pragma allow_unsafe_buffers
8 #endif
9
10 #include "components/nacl/renderer/plugin/pnacl_resources.h"
11
12 #include <stddef.h>
13
14 #include <vector>
15
16 #include "base/check.h"
17 #include "base/files/file.h"
18 #include "base/notreached.h"
19 #include "components/nacl/renderer/plugin/plugin.h"
20 #include "ppapi/c/pp_errors.h"
21
22 namespace plugin {
23
24 namespace {
25
26 static const char kPnaclBaseUrl[] = "chrome://pnacl-translator/";
27
GetFullUrl(const std::string & partial_url)28 std::string GetFullUrl(const std::string& partial_url) {
29 return std::string(kPnaclBaseUrl) + nacl::PPBNaClPrivate::GetSandboxArch() +
30 "/" + partial_url;
31 }
32
33 } // namespace
34
PnaclResources(Plugin * plugin,bool use_subzero)35 PnaclResources::PnaclResources(Plugin* plugin, bool use_subzero)
36 : plugin_(plugin), use_subzero_(use_subzero) {
37 for (PnaclResourceEntry& entry : resources_) {
38 entry.file_info = kInvalidNaClFileInfo;
39 }
40 }
41
~PnaclResources()42 PnaclResources::~PnaclResources() {
43 for (PnaclResourceEntry& entry : resources_) {
44 base::File closer(entry.file_info.handle);
45 }
46 }
47
GetUrl(ResourceType type) const48 const std::string& PnaclResources::GetUrl(ResourceType type) const {
49 size_t index = static_cast<size_t>(type);
50 DCHECK(index < NUM_TYPES);
51 return resources_[index].tool_name;
52 }
53
TakeFileInfo(ResourceType type)54 PP_NaClFileInfo PnaclResources::TakeFileInfo(ResourceType type) {
55 size_t index = static_cast<size_t>(type);
56 if (index >= NUM_TYPES) {
57 NOTREACHED();
58 }
59 PP_NaClFileInfo to_return = resources_[index].file_info;
60 resources_[index].file_info = kInvalidNaClFileInfo;
61 return to_return;
62 }
63
ReadResourceInfo()64 bool PnaclResources::ReadResourceInfo() {
65 PP_Var pp_llc_tool_name_var;
66 PP_Var pp_ld_tool_name_var;
67 PP_Var pp_subzero_tool_name_var;
68 if (!nacl::PPBNaClPrivate::GetPnaclResourceInfo(
69 plugin_->pp_instance(), &pp_llc_tool_name_var, &pp_ld_tool_name_var,
70 &pp_subzero_tool_name_var)) {
71 return false;
72 }
73 pp::Var llc_tool_name(pp::PASS_REF, pp_llc_tool_name_var);
74 pp::Var ld_tool_name(pp::PASS_REF, pp_ld_tool_name_var);
75 pp::Var subzero_tool_name(pp::PASS_REF, pp_subzero_tool_name_var);
76 resources_[LLC].tool_name = GetFullUrl(llc_tool_name.AsString());
77 resources_[LD].tool_name = GetFullUrl(ld_tool_name.AsString());
78 resources_[SUBZERO].tool_name = GetFullUrl(subzero_tool_name.AsString());
79 return true;
80 }
81
82
StartLoad()83 bool PnaclResources::StartLoad() {
84 // Do a blocking load of each of the resources.
85 std::vector<ResourceType> to_load;
86 if (use_subzero_) {
87 to_load.push_back(SUBZERO);
88 } else {
89 to_load.push_back(LLC);
90 }
91 to_load.push_back(LD);
92 bool all_valid = true;
93 for (ResourceType t : to_load) {
94 nacl::PPBNaClPrivate::GetReadExecPnaclFd(
95 resources_[t].tool_name.c_str(), &resources_[t].file_info);
96 all_valid =
97 all_valid && resources_[t].file_info.handle != PP_kInvalidFileHandle;
98 }
99 return all_valid;
100 }
101
102 } // namespace plugin
103