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C++ TargetInfo::ReadMemoryArg方法代码示例

本文整理汇总了C++中TargetInfo::ReadMemoryArg方法的典型用法代码示例。如果您正苦于以下问题:C++ TargetInfo::ReadMemoryArg方法的具体用法?C++ TargetInfo::ReadMemoryArg怎么用?C++ TargetInfo::ReadMemoryArg使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在TargetInfo的用法示例。


在下文中一共展示了TargetInfo::ReadMemoryArg方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: StackTrace

void StackTrace(
    const TargetInfo& ti,
    SymbolManager *symbol,
    target_ptr_t fp, // Frame pointer (or STG Sp register when we're in Haskell code)
    target_ptr_t ip) // Instruction pointer
{
    std::printf("ghd: Stack Trace\n");

    // Frame pointer x86 stack traversal
    struct StackFrame
    {
        target_ptr_t next;
        target_ptr_t ret;
    };
    StackFrame frame = { fp, ip };
    target_ptr_t old_fp = fp - 1;
    for (unsigned int depth=1; depth<64; depth++)
    {
        uint16_t file_name_id, line_number;
        const uint32_t sym_id =
            symbol->AddressToSymbolID(frame.ret, &file_name_id, &line_number);

        // Are we in Haskell code now?
        if (IsHaskellSymbol(ti, symbol, sym_id, file_name_id))
        {
            Indent(depth);
            std::printf("0x%x <%s> [Haskell%s]\n",
                frame.ret,
                symbol->SymbolIDToName(sym_id),
                ti.m_profiling_rts ? ", switching to CCS" : ", switching to STG stack");

            if (ti.m_profiling_rts)
            {
                // We have a CCS, pick it up from the Sp in the frame
                const target_ptr_t ccs = CCSPtrFromTopOfStack(ti, frame.next);
                if (ccs == 0)
                {
                    Indent(depth + 1);
                    std::printf("(Can't access CCS from STG stack at Sp = 0x%x)\n", frame.next);
                }
                else
                    DumpCCS(ti, ccs, depth + 1);
            }
            else
            {
                // No profiling RTS, proceed with the STG stack
                DumpSTG(ti, symbol, frame.next, depth + 1);
            }
            break; // Done, we don't handle any potential Haskell -> C transition yet
        }

        // Current frame's function
        Indent(depth);
        std::printf("0x%x <%s> from %s (%s:%i)\n",
            frame.ret,
            symbol->SymbolIDToName(sym_id),
            symbol->SymbolIDToModule(sym_id),
            symbol->FileIDToName(file_name_id),
            line_number);

        // Some sanity checks for the frame link pointer
        bool stop_traversal = false;
        if (frame.next < 1024)
        {
            Indent(depth + 1);
            std::printf("(Next frame near zero)\n");
            stop_traversal = true;
        }
        if (frame.next % sizeof(void *) != 0) // IIRC, OS X actually requires 16b alignment
        {
            Indent(depth + 1);
            std::printf("(Next frame improperly aligned)\n");
            stop_traversal = true;
        }
        if (frame.next == old_fp)
        {
            Indent(depth + 1);
            std::printf("(Next frame identical to current)\n");
            stop_traversal = true;
        }
        if (frame.next < old_fp)
        {
            Indent(depth + 1);
            std::printf("(Next frame before current)\n");
            stop_traversal = true;
        }
        if (frame.next - old_fp > 32 * 1024 * 1024)
        {
            Indent(depth + 1);
            std::printf("(Next frame >32MB away from current)\n");
            stop_traversal = true;
        }

        // Next frame
        old_fp = frame.next;
        if (ti.ReadMemoryArg(frame.next, sizeof(StackFrame), &frame) == false)
        {
            // Likely a bad address, stop traversing
            Indent(depth + 1);
            std::printf("(Can't access next frame)\n");
//.........这里部分代码省略.........
开发者ID:blitzcode,项目名称:ghc-stack,代码行数:101,代码来源:ghd.cpp


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