Files that are opened by fopen_s and _wfopen_s are not sharable. If you require that a file be sharable, use _fsopen, _wfsopen with the appropriate sharing mode constant—for example, _SH_DENYNO for read/write sharing.
However, if the application is being debugged, the debugger sees all exceptions before the program does. This is the distinction between the first and second chance exception: the debugger gets the first chance to see the exception (hence the name). If the debugger allows the program execution to continue and does not handle the exception, the program will see the exception as usual. If the program does not handle the exception, the debugger gets a second chance to see the exception. In this latter case, the program normally would crash if the debugger were not present.
# 指定 .pdb 檔存放目錄。 $ .symfix c:\myCache # 下載 .pdb 檔。 $ .reload /f
# 取得例外的完整資訊。 $ !analyze -v
Causes the application to use the multithread, static version of the run-time library.
Causes the application to use the multithread-specific and DLL-specific version of the run-time library.
Exposing C++ objects by value requires the client of your DLL to use the same CRT so that objects that are created in the DLL can be safely destroyed by the client app. And the other way around. Which requires that these modules use the same heap.
If a dynamic-link library (DLL) contains a static link to the run-time library, it has its own instance of the run-time heap, and therefore its own heap, independent of the application's local heap.
All Visual C\+\+ exceptions thrown from code generated by the Microsoft Visual C\+\+ compiler contain this error code.
catch (_com_error& ex) {}
Specifies the model of exception handling to be used by the compiler and destroys C\+\+ objects that will go out of scope as a result of the exception. If /EH is not specified, the compiler will catch structured and C\+\+ exceptions, but will not destroy C\+\+ objects that will go out of scope as a result of the exception.
Use /EHs to specify the synchronous exception handling model (C\+\+ exception handling without structured exception handling exceptions).
If used with s (/EHsc), catches C\+\+ exceptions only and tells the compiler to assume that extern C functions never throw a C\+\+ exception.
Use /EHa to specify the asynchronous exception handling model (C\+\+ exception handling with structured exception handling exceptions).
In previous versions of Visual C\+\+, the C\+\+ exception handling mechanism supported asynchronous (hardware) exceptions by default. Under the asynchronous model, the compiler assumes any instruction may generate an exception. With the new synchronous exception model, now the default, exceptions can be thrown only with a throw statement.
try { // guarded body of code } except (filter-expression) { // exception-handler block }
You can use this method to profile a process when you want to avoid gathering data about application load time, or to monitor the performance of a process after it reaches a specific state.
It is recommended to use a release build to detect performance problems in your application. A release build is recommended for profiling because a debug build has additional information compiled into it that may adversely affect performance and fail to illustrate performance issues accurately. A release build does not automatically give you symbol information. To configure your build so symbol information is visible in profiler performance reports, see /Z7, /Zi, /ZI (Debug Information Format) and How to: Reference Windows Symbol Information.
The executable that is to be profiled needs to have been linked with the /profile switch, which can be done with a simple recompile after changing the corresponding configuration option.
The first benefit of this feature is reduced instrumentation probe execution overhead.
The second benefit is reduced profile data file (.vsp) size.
With this feature enabled, it’s important to note that the time spent executing a small function does not just disappear.
PS C:\> DUMPBIN /ARCHIVEMEMBERS libboost_graph-vc80-mt-1_57.lib PS C:\> LIB libboost_graph-vc80-mt-1_57.lib /EXTRACT:bin.v2\libs\graph\build\msvc-8.0\release\address-model-32\link-static\threading-multi\read_graphviz_new.obj # 或是直接用 Notepad 開啟 read_graphviz_new.obj，搜尋 manifestdependency，後面的字串包含其鏈結 C 運行時函式庫的版本。 PS C:\> DUMPBIN /DIRECTIVES read_graphviz_new.obj
namespace MyNameSpace { enum MyEnum { E1 }; MyNameSpace::E1; // ok MyNameSpace::MyEnum::E1; // warning };