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Unreal4: 打印当前调用栈

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在 StartupModule() 中添加调用栈输出的方法 方法 1：使用 FPlatformStackWalk::StackWalkAndDump 

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#include "HAL/PlatformStackWalk.h"  // 需要添加这个头文件

void FGPULightmassModule::StartupModule()
{
    UE_LOG(LogGPULightmass, Log, TEXT("GPULightmass module is loaded"));
    
    // 输出调用栈
    ANSICHAR StackTrace[65536] = {0};
    constexpr int32 NumStackFramesToIgnore = 1;  // 忽略当前函数本身
    FPlatformStackWalk::StackWalkAndDump(StackTrace, UE_ARRAY_COUNT(StackTrace), NumStackFramesToIgnore, nullptr);
    
    // 将 ANSI 字符串转换为 FString 并输出
    FString StackTraceString = ANSI_TO_TCHAR(StackTrace);
    UE_LOG(LogGPULightmass, Log, TEXT("Call Stack:\n%s"), *StackTraceString);
    
    // Maps virtual shader source directory /Plugin/GPULightmass to the plugin's actual Shaders directory.
    FString PluginShaderDir = FPaths::Combine(IPluginManager::Get().FindPlugin(TEXT("GPULightmass"))->GetBaseDir(), TEXT("Shaders"));
    AddShaderSourceDirectoryMapping(TEXT("/Plugin/GPULightmass"), PluginShaderDir);

    FStaticLightingSystemInterface::Get()->RegisterImplementation(FName(TEXT("GPULightmass")), this);
}
方法 2：使用 CaptureStackBackTrace 
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#include "HAL/PlatformStackWalk.h"

void FGPULightmassModule::StartupModule()
{
    UE_LOG(LogGPULightmass, Log, TEXT("GPULightmass module is loaded"));
    
    // 捕获调用栈地址
    constexpr int32 MaxDepth = 20;
    uint64 BackTrace[MaxDepth] = {0};
    uint32 CapturedDepth = FPlatformStackWalk::CaptureStackBackTrace(BackTrace, MaxDepth);
    
    // 输出调用栈
    UE_LOG(LogGPULightmass, Log, TEXT("Call Stack (Depth: %d):"), CapturedDepth);
    for (uint32 i = 0; i < CapturedDepth; ++i)
    {
        FProgramCounterSymbolInfo SymbolInfo;
        FPlatformStackWalk::ProgramCounterToSymbolInfo(BackTrace[i], SymbolInfo);
        
        UE_LOG(LogGPULightmass, Log, TEXT("  [%d] %s!%s [%s:%d]"), 
            i,
            ANSI_TO_TCHAR(SymbolInfo.ModuleName),
            ANSI_TO_TCHAR(SymbolInfo.FunctionName),
            ANSI_TO_TCHAR(SymbolInfo.Filename),
            SymbolInfo.LineNumber);
    }
    
}

方法3: 使用 UE4 的调试宏 ``` c++ #include “HAL/PlatformStackWalk.h”

void FGPULightmassModule::StartupModule() { UE_LOG(LogGPULightmass, Log, TEXT(“GPULightmass module is loaded”));

// 使用 UE4 的调用栈输出
ANSICHAR StackTrace[65536] = {0};
FPlatformStackWalk::StackWalkAndDump(StackTrace, UE_ARRAY_COUNT(StackTrace), 1, nullptr);

// 直接输出到日志
UE_LOG(LogGPULightmass, Warning, TEXT("=== StartupModule Call Stack ===\n%s"), ANSI_TO_TCHAR(StackTrace));

// ... 其余代码

}

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