德尔福 XE,Windows 7 64 位
当您向空应用程序添加语言支持时,您将收到内存泄漏 (FastMM4)。
如何重现:
- 创建新的 VCL 表单应用程序
- 修改 .dpr 并添加
ReportMemoryLeaksOnShutdown := True;
- 构建/运行应用程序并关闭应用程序 -> 未报告泄漏
- 现在添加一种语言(项目->语言->添加)
- 再次构建/运行并关闭应用程序 -> 内存泄漏??
FastMM4 完整调试模式报告:
--------------------------------2013/7/16 14:54:34--------------------------------
A memory block has been leaked. The size is: 12
This block was allocated by thread 0x17EC, and the stack trace (return addresses) at the time was:
40455E
40952D
4094C8
409834
409941
450058
74548D76 [Unknown function at FirstHookFunc]
7778FA1A [ZwOpenKey]
75924033 [OpenRegKey]
759240AE [OpenRegKey]
777FA71A [Unknown function at RtlUlonglongByteSwap]
The block is currently used for an object of class: Unknown
The allocation number is: 6
Current memory dump of 256 bytes starting at pointer address 7EF9A610:
6E 00 6C 00 2D 00 42 00 45 00 00 00 41 58 0D 7A 00 00 00 00 C1 A6 F9 7E 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 2E 00 00 00 5E 45 40 00 DD 99 40 00 6D 71 4B 00 98 65 40 00 04 66 40 00
77 A6 40 00 98 7C 4B 00 AA 33 8D 76 F2 9E 7A 77 C5 9E 7A 77 00 00 00 00 EC 17 00 00 EC 17 00 00
1F 9A 40 00 53 7F 42 00 2C 65 40 00 EA 68 40 00 E3 7C 4B 00 AA 33 8D 76 F2 9E 7A 77 C5 9E 7A 77
00 00 00 00 00 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 B6 5C 27 4D 5C 12 4C 00 80 80 80 80
49 A3 D8 B2 80 80 80 80 00 00 00 00 F9 B7 F9 7E 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
65 00 00 00 5E 45 40 00 A7 50 40 00 22 56 40 00 DC 50 40 00 5F 72 4B 00 78 96 44 00 8E 72 4B 00
98 65 40 00 04 66 40 00 77 A6 40 00 98 7C 4B 00 EC 17 00 00 EC 17 00 00 7A 45 40 00 C5 50 40 00
n . l . - . B . E . . . A X . z . . . . Á ¦ ù ~ . . . . . . . .
. . . . . . . . . . . . ^ E @ . Ý ™ @ . m q K . ˜ e @ . . f @ .
w ¦ @ . ˜ | K . ª 3 v ò ž z w Å ž z w . . . . ì . . . ì . . .
. š @ . S B . , e @ . ê h @ . ã | K . ª 3 v ò ž z w Å ž z w
. . . . . . . . . . . . . . . . . . . . ¶ \ ' M \ . L . € € € €
I £ Ø ² € € € € . . . . ù · ù ~ . . . . . . . . . . . . . . . .
e . . . ^ E @ . § P @ . " V @ . Ü P @ . _ r K . x – D . Ž r K .
˜ e @ . . f @ . w ¦ @ . ˜ | K . ì . . . ì . . . z E @ . Å P @ .
--------------------------------2013/7/16 14:54:34--------------------------------
This application has leaked memory. The small block leaks are (excluding expected leaks registered by pointer):
5 - 12 bytes: Unknown x 1
Note: Memory leak detail is logged to a text file in the same folder as this application. To disable this memory leak check, undefine "EnableMemoryLeakReporting".
现在到了有趣的部分:删除语言并再次运行 -> 泄漏仍然存在!
我可以通过删除除 .dpr 和 .res 文件之外的所有项目相关文件(.dproj、.dproj2007、.dsk 等)来消除泄漏。
有人可以解释一下发生了什么吗?
更新
使用详细日志中的地址,我似乎在 System.Pas 中发现了泄漏:
var
PreferredLanguagesOverride: PChar = nil;
...
procedure SetLocaleOverride(const NewPreferredLanguages: string);
var
L: Integer;
begin
if PreferredLanguagesOverride <> nil then
FreeMem(PreferredLanguagesOverride);
L := Length(NewPreferredLanguages);
if L > 0 then
begin
Inc(L);
GetMem(PreferredLanguagesOverride, L * SizeOf(Char));
MoveChars(NewPreferredLanguages[1], PreferredLanguagesOverride^, L);
end;
end;
调用 SetLocaleOverride 并为PreferredLanguagesOverride
PChar
. 我扫描了 System.Pas,FreeMem(PreferredLanguagesOverride)
但这是唯一的情况!
更新2
SetLocaleOverride
我找到了delphi调用例程的原因:
添加语言支持时,会创建一个注册表项,名称为可执行完整路径,当前系统区域设置为值:HKEY_CURRENT_USER\Software\Embarcadero\Locales
删除此键可防止 delphi 调用SetLocaleOverride
例程。
问题:
- 有人可以验证此问题是否存在于更高版本的 Delphi 中吗?(或者我做一个质量控制报告)
更新 3
已经有QC 报告 (105136)并且已从 XE3 修复
问题:有人可以告诉我这是如何在 XE3 中修补的吗?