void TranslatorX64::fCallArrayHelper(const Offset pcOff, const Offset pcNext) {
DECLARE_FRAME_POINTER(framePtr);
ActRec* fp = (ActRec*)framePtr->m_savedRbp;
VMExecutionContext *ec = g_vmContext;
ec->m_fp = fp;
ec->m_stack.top() = sp;
ec->m_pc = fp->unit()->at(pcOff);
PC pc = fp->unit()->at(pcNext);
tl_regState = VMRegState::CLEAN;
bool runFunc = ec->doFCallArray(pc);
sp = ec->m_stack.top();
tl_regState = VMRegState::DIRTY;
if (!runFunc) return;
ec->m_fp->m_savedRip = framePtr->m_savedRip;
// smash our return and frame pointer chain
framePtr->m_savedRip = (uint64_t)ec->m_fp->m_func->getFuncBody();
framePtr->m_savedRbp = (uint64_t)ec->m_fp;
}
void XDebugProfiler::enableTracing(const String& filename, int64_t opts) {
assert(!m_tracingEnabled);
// Attempt to open the passed filename. php5 xdebug doesn't enable tracing
// if we cannot open the file, so we need to open it now as opposed to when we
// actually do the writing in order to ensure we handle this case. We keep the
// file handle open in order to ensure we can still write on tracing stop
FILE* file;
if (opts & k_XDEBUG_TRACE_APPEND) {
file = fopen(filename.data(), "a");
} else {
file = fopen(filename.data(), "w");
}
// If file is null, opening the passed filename failed. php5 xdebug doesn't
// do anything in this case, but we should probably notify the user
if (file == nullptr) {
raise_warning("xdebug profiler failed to open tracing file %s for writing.",
filename.data());
return;
}
m_tracingEnabled = true;
m_tracingStartIdx = m_nextFrameIdx;
m_tracingFilename = filename;
m_tracingFile = file;
m_tracingOpts = opts;
// If we're not at the top level, need to grab the call sites for each frame
// on the stack.
VMRegAnchor _;
Offset offset;
ActRec* fp = vmfp();
while ((fp = g_context->getPrevVMState(fp, &offset)) != nullptr) {
FrameData frame;
frame.func = fp->func();
frame.line = fp->unit()->getLineNumber(offset);
m_tracingStartFrameData.push_back(frame);
}
}