本文整理汇总了C++中WasmActivation::exitReason方法的典型用法代码示例。如果您正苦于以下问题：C++ WasmActivation::exitReason方法的具体用法？C++ WasmActivation::exitReason怎么用？C++ WasmActivation::exitReason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类WasmActivation的用法示例。
在下文中一共展示了WasmActivation::exitReason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: ReturnAddressFromFP
void
ProfilingFrameIterator::initFromFP(const WasmActivation& activation)
{
uint8_t* fp = activation.fp();
// If a signal was handled while entering an activation, the frame will
// still be null.
if (!fp) {
MOZ_ASSERT(done());
return;
}
// Since we don't have the pc for fp, start unwinding at the caller of fp
// (ReturnAddressFromFP(fp)). This means that the innermost frame is
// skipped. This is fine because:
// - for import exit calls, the innermost frame is a thunk, so the first
// frame that shows up is the function calling the import;
// - for Math and other builtin calls as well as interrupts, we note the absence
// of an exit reason and inject a fake "builtin" frame; and
// - for async interrupts, we just accept that we'll lose the innermost frame.
void* pc = ReturnAddressFromFP(fp);
const CodeRange* codeRange = instance_->lookupCodeRange(pc);
MOZ_ASSERT(codeRange);
codeRange_ = codeRange;
stackAddress_ = fp;
switch (codeRange->kind()) {
case CodeRange::Entry:
callerPC_ = nullptr;
callerFP_ = nullptr;
break;
case CodeRange::Function:
fp = CallerFPFromFP(fp);
callerPC_ = ReturnAddressFromFP(fp);
callerFP_ = CallerFPFromFP(fp);
AssertMatchesCallSite(*instance_, callerPC_, callerFP_, fp);
break;
case CodeRange::ImportJitExit:
case CodeRange::ImportInterpExit:
case CodeRange::Inline:
case CodeRange::CallThunk:
MOZ_CRASH("Unexpected CodeRange kind");
}
// The iterator inserts a pretend innermost frame for non-None ExitReasons.
// This allows the variety of exit reasons to show up in the callstack.
exitReason_ = activation.exitReason();
// In the case of calls to builtins or asynchronous interrupts, no exit path
// is taken so the exitReason is None. Coerce these to the Native exit
// reason so that self-time is accounted for.
if (exitReason_ == ExitReason::None)
exitReason_ = ExitReason::Native;
MOZ_ASSERT(!done());
}