79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
#include "stdafx.h"
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#include "CallstackManager.h"
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#include "Debugger.h"
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#include "DebugBreakHelper.h"
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CallstackManager::CallstackManager(Debugger* debugger)
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{
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_debugger = debugger;
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}
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void CallstackManager::Push(uint32_t srcAddr, uint32_t destAddr, uint32_t returnAddress, StackFrameFlags flags)
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{
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if(_callstack.size() >= 511) {
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//Ensure callstack stays below 512 entries - games can use various tricks that could keep making the callstack grow
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_callstack.pop_front();
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}
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StackFrameInfo stackFrame;
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stackFrame.Source = srcAddr;
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stackFrame.Target = destAddr;
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stackFrame.Return = returnAddress;
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stackFrame.Flags = flags;
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_callstack.push_back(stackFrame);
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}
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void CallstackManager::Pop(uint32_t destAddress)
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{
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if(_callstack.empty()) {
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return;
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}
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StackFrameInfo prevFrame = _callstack.back();
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_callstack.pop_back();
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uint32_t returnAddr = prevFrame.Return;
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if(!_callstack.empty() && destAddress != returnAddr) {
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//Mismatch, pop that stack frame and add the new one
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bool foundMatch = false;
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for(int i = (int)_callstack.size() - 1; i >= 0; i--) {
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if(destAddress == _callstack[i].Return) {
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//Found a matching stack frame, unstack until that point
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foundMatch = true;
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for(int j = (int)_callstack.size() - i - 1; j >= 0; j--) {
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_callstack.pop_back();
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}
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break;
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}
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}
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if(!foundMatch) {
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//Couldn't find a matching frame, replace the current one
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Push(returnAddr, destAddress, returnAddr, StackFrameFlags::None);
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}
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}
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}
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void CallstackManager::GetCallstack(StackFrameInfo* callstackArray, uint32_t &callstackSize)
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{
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DebugBreakHelper helper(_debugger);
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int i = 0;
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for(StackFrameInfo &info : _callstack) {
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callstackArray[i] = info;
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i++;
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}
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callstackSize = i;
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}
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int32_t CallstackManager::GetReturnAddress()
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{
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DebugBreakHelper helper(_debugger);
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if(_callstack.empty()) {
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return -1;
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}
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return _callstack.back().Return;
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}
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