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damjan pushed a commit to branch windows-amd64
in repository https://gitbox.apache.org/repos/asf/openoffice.git
commit 91a82f51b994378b285296537635517faa325e04
Author: Damjan Jovanovic <dam...@apache.org>
AuthorDate: Sat Jan 25 03:07:58 2025 +0200
Fix the __type_info layout. It should be the same on Win32 and Win64.
Also add some documentation.
Patch by: me
---
.../source/cpp_uno/msvc_win64_x86-64/except.cxx | 69 ++++++++++++++++++++--
1 file changed, 64 insertions(+), 5 deletions(-)
diff --git a/main/bridges/source/cpp_uno/msvc_win64_x86-64/except.cxx
b/main/bridges/source/cpp_uno/msvc_win64_x86-64/except.cxx
index 156af671e5..a61fb7f715 100644
--- a/main/bridges/source/cpp_uno/msvc_win64_x86-64/except.cxx
+++ b/main/bridges/source/cpp_uno/msvc_win64_x86-64/except.cxx
@@ -47,6 +47,67 @@ using namespace ::std;
using namespace ::osl;
using namespace ::rtl;
+//##############################################################################
+// Windows's C++ exception handling is built on top of SEH (Structured
Exception Handling).
+//
+// SEH documentation:
+//
https://web.archive.org/web/20060114142024/https://www.microsoft.com/msj/0197/exception/exception.aspx
+//
+// See this excellent article,
+// "Decoding the parameters of a thrown C++ exception (0xE06D7363)"
+// by Raymond Chen:
+// https://devblogs.microsoft.com/oldnewthing/20100730-00/?p=13273
+//
+// Then this one with more details on ExceptionInformation:
+// http://workblog.pilin.name/2014/03/decoding-parameters-of-thrown-c.html
+//
+// Others:
+// https://github.com/icestudent/ontl/blob/master/ntl/nt/exception.hxx
+// https://www.openrce.org/articles/full_view/21
+// https://www.openrce.org/articles/full_view/23
+//
+// For a C++ exception in SEH, on AMD64:
+//
+// +-----------------------------------+
+-------------------------------------------------------------+
+// |EXCEPTION_POINTERS | |EXCEPTION_RECORD
|
+// +-----------------------------------+
+-------------------------------------------------------------+
+// |PEXCEPTION_RECORD ExceptionRecord;|----------->|DWORD ExceptionCode; //
== 0xE06D7363 for C++ exception |
+// |PCONTEXT ContextRecord; | |DWORD ExceptionFlags;
|
+// +-----------------------------------+ |struct _EXCEPTION_RECORD
*ExceptionRecord; |
+// |PVOID ExceptionAddress;
|
+// |DWORD NumberParameters;
// == 4 on AMD64, 3 on i386 |
+// |ULONG_PTR
ExceptionInformation[0]; |
+// C++ object being thrown <----------|ULONG_PTR
ExceptionInformation[1]; |
+// +----------------------------------------------|ULONG_PTR
ExceptionInformation[2]; |
+// | HINSTANCE of the EXE/DLL where <----------|ULONG_PTR
ExceptionInformation[3]; |
+// | where the exception was thrown |ULONG_PTR
ExceptionInformation[...]; |
+// | |ULONG_PTR
ExceptionInformation[EXCEPTION_MAXIMUM_PARAMETERS];|
+// | offset from HINSTANCE
+-------------------------------------------------------------+
+// | to:
+// | +------------------------------+
+// | |ThrowInfo |
+// | +------------------------------+
+// +---->|unsigned int attributes; |
+----------------------------------+
+// |PMFN pmfnUnwind; |
|CatchableTypeArray |
+// |__int32 pForwardCompat; | offset from HINSTANCE to:
+----------------------------------+
+// |__int32 pCatchableTypeArray;|---------------------------->|int
nCatchableTypes; |
+// +------------------------------+
+--------|__int32 arrayOfCatchableTypes[];|
+// |
+----------------------------------+
+// +------------------------+ |
+// |CatchableType | |
+// +------------------------+ offsets from HINSTANCE to |
+// |unsigned int properties;|<--------------------------+
+--------------------------------+
+// |__int32 pType; |---------+
|TypeDescriptor |
+// |PMD thisDisplacement;| | offset from HINSTANCE to
+--------------------------------+
+// |int sizeOrOffset; | +------------------------->|const
void * _EH_PTR64 pVFTable;|
+// |PMFN copyFunction; | |void
* _EH_PTR64 spare; |
+// +------------------------+ |char
name[]; |
+//
+--------------------------------+
+//
+//
+//
+//
+
namespace CPPU_CURRENT_NAMESPACE
{
@@ -117,9 +178,8 @@ class __type_info
public:
virtual ~__type_info() throw ();
- inline __type_info( void * m_vtable, const char * m_d_name ) throw ()
- : _m_vtable( m_vtable )
- , _m_name( NULL )
+ inline __type_info( void * m_data, const char * m_d_name ) throw ()
+ : _m_data( m_data )
{ ::strcpy( _m_d_name, m_d_name ); } // #100211# - checked
size_t length() const
@@ -128,8 +188,7 @@ public:
}
private:
- void * _m_vtable;
- char * _m_name; // cached copy of unmangled name, NULL initially
+ void * _m_data;
char _m_d_name[1]; // mangled name
};
//__________________________________________________________________________________________________
