Fix omnibox logging for zero suggest.
[chromium-blink-merge.git] / chrome / app / chrome_exe_load_config_win.cc
blob0fcd87a5dae76b036dbfff0373cd85b411b1001c
1 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include <windows.h>
7 // The whole object of this file is to define |_load_config_used| which
8 // is a weakly-linked symbol that the linker knows about. The crt defines
9 // it as well it but this one will be used if present.
11 // The _load_config_used appears in the exe as a special member of the PE
12 // image format: the load config directory. This structure controls
13 // global parameters which are hard or impossible to set otherwise. This
14 // MSDN page https://goo.gl/zsGeVY documents some of the members.
16 // When making a changes to this stucture the only practical way to make
17 // sure they are honored is to run dumpbin.exe <exe-file> /loadconfig
18 // and inspect the results.
20 #if defined(_WIN64)
21 typedef struct {
22 DWORD Size;
23 DWORD TimeDateStamp;
24 WORD MajorVersion;
25 WORD MinorVersion;
26 DWORD GlobalFlagsClear;
27 DWORD GlobalFlagsSet;
28 DWORD CriticalSectionDefaultTimeout;
29 ULONGLONG DeCommitFreeBlockThreshold;
30 ULONGLONG DeCommitTotalFreeThreshold;
31 ULONGLONG LockPrefixTable;
32 ULONGLONG MaximumAllocationSize;
33 ULONGLONG VirtualMemoryThreshold;
34 ULONGLONG ProcessAffinityMask;
35 DWORD ProcessHeapFlags;
36 WORD CSDVersion;
37 WORD Reserved1;
38 ULONGLONG EditList;
39 ULONGLONG SecurityCookie;
40 ULONGLONG SEHandlerTable;
41 ULONGLONG SEHandlerCount;
42 } IMAGE_LOAD_CONFIG_DIRECTORY64_2;
43 typedef IMAGE_LOAD_CONFIG_DIRECTORY64_2 IMAGE_LOAD_CONFIG_DIRECTORY_2;
44 #else
45 typedef struct {
46 DWORD Size;
47 DWORD TimeDateStamp;
48 WORD MajorVersion;
49 WORD MinorVersion;
50 DWORD GlobalFlagsClear;
51 DWORD GlobalFlagsSet;
52 DWORD CriticalSectionDefaultTimeout;
53 DWORD DeCommitFreeBlockThreshold;
54 DWORD DeCommitTotalFreeThreshold;
55 DWORD LockPrefixTable;
56 DWORD MaximumAllocationSize;
57 DWORD VirtualMemoryThreshold;
58 DWORD ProcessHeapFlags;
59 DWORD ProcessAffinityMask;
60 WORD CSDVersion;
61 WORD Reserved1;
62 DWORD EditList;
63 PUINT_PTR SecurityCookie;
64 PVOID *SEHandlerTable;
65 DWORD SEHandlerCount;
66 } IMAGE_LOAD_CONFIG_DIRECTORY32_2;
67 typedef IMAGE_LOAD_CONFIG_DIRECTORY32_2 IMAGE_LOAD_CONFIG_DIRECTORY_2;
68 #endif
70 // What follows, except as indicated is verbatim (including casts) from
71 // <visual studio path>\VC\crt\src\intel\loadcfg.c. The default values
72 // are all 0 except for the last 3 members. See
73 // https://msdn.microsoft.com/en-us/library/9a89h429.aspx for an
74 // explanation of these members.
75 extern "C" UINT_PTR __security_cookie;
76 extern "C" PVOID __safe_se_handler_table[];
77 extern "C" BYTE __safe_se_handler_count;
79 // DeCommitTotalFreeThreshold: increase the decomit free threshold for
80 // the process heap, which is documented as "The size of the minimum
81 // total memory that must be freed in the process heap before it is
82 // freed (de-committed) in bytes".
84 // Set at 2 MiB what this does is prevent a lot of VirtualFree plus the
85 // following VirtualAlloc because the default value makes the heap too
86 // conservative on the ammount of memory it keeps for future allocations.
88 extern "C"
89 const IMAGE_LOAD_CONFIG_DIRECTORY_2 _load_config_used = {
90 sizeof(IMAGE_LOAD_CONFIG_DIRECTORY_2),
91 0, // TimeDateStamp.
92 0, // MajorVersion.
93 0, // MinorVersion.
94 0, // GlobalFlagsClear.
95 0, // GlobalFlagsSet.
96 0, // CriticalSectionDefaultTimeout.
97 0, // DeCommitFreeBlockThreshold.
98 2 * 1024 * 1024, // DeCommitTotalFreeThreshold.
99 0, // LockPrefixTable.
100 0, // MaximumAllocationSize.
101 0, // VirtualMemoryThreshold.
102 0, // ProcessHeapFlags.
103 0, // ProcessAffinityMask.
104 0, // CSDVersion.
105 0, // Reserved1.
106 0 , // EditList.
107 #ifdef _WIN64
108 (ULONGLONG)&__security_cookie,
109 #else
110 &__security_cookie,
111 __safe_se_handler_table,
112 (DWORD)(DWORD_PTR)&__safe_se_handler_count
113 #endif