Changeset 101828 in vbox for trunk/src

Timestamp:

Nov 5, 2023 1:35:54 PM (16 months ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

159924

Message:

libs/xpcom: Get rid of unused nsStackFrameUnix.{cpp,h} (disabled using the VBOX pre-processor define), bugref:10545

Location:

trunk/src/libs/xpcom18a4

Files:

• Makefile.kmk (modified) (1 diff)
• xpcom/base/nsStackFrameUnix.cpp (deleted)
• xpcom/base/nsStackFrameUnix.h (deleted)
• xpcom/base/nsTraceRefcntImpl.cpp (modified) (1 diff)

trunk/src/libs/xpcom18a4/Makefile.kmk

@@ -595 +595 @@
         xpcom/base/nsID.cpp \
         xpcom/base/nsMemoryImpl.cpp \
-        xpcom/base/nsTraceRefcntImpl.cpp \
-        xpcom/base/nsStackFrameUnix.cpp
+        xpcom/base/nsTraceRefcntImpl.cpp
 $(evalcall VBOX_XPCOM_X86,VBox-xpcom-base)
 

trunk/src/libs/xpcom18a4/xpcom/base/nsTraceRefcntImpl.cpp

@@ -833 +833 @@
 #endif
 
-#if defined(_WIN32) && defined(_M_IX86) // WIN32 x86 stack walking code
-#include "nsStackFrameWin.h"
 void
 nsTraceRefcntImpl::WalkTheStack(FILE* aStream)
 {
-  DumpStackToFile(aStream);
-}
-
-// WIN32 x86 stack walking code
-// i386 or PPC Linux stackwalking code or Solaris
-#elif (defined(linux) && !defined(VBOX) && defined(__GLIBC__) && (defined(__i386) || defined(PPC))) || (defined(__sun) && (defined(__sparc) || defined(sparc) || defined(__i386) || defined(i386)))
-#include "nsStackFrameUnix.h"
-void
-nsTraceRefcntImpl::WalkTheStack(FILE* aStream)
-{
-  DumpStackToFile(aStream);
-}
-
-#elif defined(XP_MAC)
-
-/**
- * Stack walking code for the Mac OS.
- */
-
-#include "gc_fragments.h"
-
-#include <typeinfo>
-
-extern "C" {
-void MWUnmangle(const char *mangled_name, char *unmangled_name, size_t buffersize);
-}
-
-struct traceback_table {
-        long zero;
-        long magic;
-        long reserved;
-        long codeSize;
-        short nameLength;
-        char name[2];
-};
-
-static char* pc2name(long* pc, char name[], long size)
-{
-        name[0] = '\0';
-        
-        // make sure pc is instruction aligned (at least).
-        if (UInt32(pc) == (UInt32(pc) & 0xFFFFFFFC)) {
-                long instructionsToLook = 4096;
-                long* instruction = (long*)pc;
-                
-                // look for the traceback table.
-                while (instructionsToLook--) {
-                        if (instruction[0] == 0x4E800020 && instruction[1] == 0x00000000) {
-                                traceback_table* tb = (traceback_table*)&instruction[1];
-                                memcpy(name, tb->name + 1, --nameLength);
-                                name[nameLength] = '\0';
-                                break;
-                        }
-                        ++instruction;
-                }
-        }
-        
-        return name;
-}
-
-struct stack_frame {
-        stack_frame*    next;                           // savedSP
-        void*                   savedCR;
-        void*                   savedLR;
-        void*                   reserved0;
-        void*                   reserved1;
-        void*                   savedTOC;
-};
-
-static asm stack_frame* getStackFrame() 
-{
-        mr              r3, sp
-        blr
-}
-
-NS_COM void
-nsTraceRefcntImpl::WalkTheStack(FILE* aStream)
-{
-  stack_frame* currentFrame = getStackFrame();    // WalkTheStack's frame.
-        currentFrame = currentFrame->next;                  // WalkTheStack's caller's frame.
-        currentFrame = currentFrame->next;              // WalkTheStack's caller's caller's frame.
-    
-        while (true) {
-                // LR saved at 8(SP) in each frame. subtract 4 to get address of calling instruction.
-                void* pc = currentFrame->savedLR;
-
-                // convert PC to name, unmangle it, and generate source location, if possible.
-                static char symbol_name[1024], unmangled_name[1024], file_name[256]; UInt32 file_offset;
-                
-        if (GC_address_to_source((char*)pc, symbol_name, file_name, &file_offset)) {
-                        MWUnmangle(symbol_name, unmangled_name, sizeof(unmangled_name));
-                fprintf(aStream, "%s[%s,%ld]\n", unmangled_name, file_name, file_offset);
-        } else {
-                    pc2name((long*)pc, symbol_name, sizeof(symbol_name));
-                        MWUnmangle(symbol_name, unmangled_name, sizeof(unmangled_name));
-                fprintf(aStream, "%s(0x%08X)\n", unmangled_name, pc);
-        }
-
-                currentFrame = currentFrame->next;
-                // the bottom-most frame is marked as pointing to NULL, or is ODD if a 68K transition frame.
-                if (currentFrame == NULL || UInt32(currentFrame) & 0x1)
-                        break;
-        }
-}
-
-#else // unsupported platform.
-
-void
-nsTraceRefcntImpl::WalkTheStack(FILE* aStream)
-{
         fprintf(aStream, "write me, dammit!\n");
 }
-
-#endif
 
 //----------------------------------------------------------------------