/*
* This is used to generate an entry point for the entry
* to a function, after the prologue has run.
*/
TCA funcBodyHelper(ActRec* fp, void* sp) {
setupAfterPrologue(fp, sp);
tl_regState = VMRegState::CLEAN;
Func* func = const_cast<Func*>(fp->m_func);
TCA tca = mcg->getCallArrayPrologue(func);
if (!tca) {
tca = tx->uniqueStubs.resumeHelper;
}
tl_regState = VMRegState::DIRTY;
return tca;
}
/*
* This is used to generate an entry point for the entry to a function, after
* the prologue has run.
*/
TCA funcBodyHelper(ActRec* fp, void* sp) {
assert_native_stack_aligned();
setupAfterPrologue(fp, sp);
tl_regState = VMRegState::CLEAN;
Func* func = const_cast<Func*>(fp->m_func);
TCA tca = mcg->getCallArrayPrologue(func);
if (!tca) {
tca = mcg->tx().uniqueStubs.resumeHelper;
}
tl_regState = VMRegState::DIRTY;
return tca;
}
/*
* This is used to generate an entry point for the entry to a function, after
* the prologue has run.
*/
TCA funcBodyHelper(ActRec* fp) {
assert_native_stack_aligned();
void* const sp = reinterpret_cast<Cell*>(fp) - fp->func()->numSlotsInFrame();
setupAfterPrologue(fp, sp);
tl_regState = VMRegState::CLEAN;
auto const func = const_cast<Func*>(fp->m_func);
auto tca = mcg->getFuncBody(func);
if (!tca) {
tca = mcg->tx().uniqueStubs.resumeHelper;
}
tl_regState = VMRegState::DIRTY;
return tca;
}
TCA fcallHelper(ActRec* ar, void* sp) {
try {
TCA tca =
mcg->getFuncPrologue((Func*)ar->m_func, ar->numArgs(), ar);
if (tca) {
return tca;
}
if (!ar->m_func->isClonedClosure()) {
/*
* If the func is a cloned closure, then the original
* closure has already run the prologue, and the prologues
* array is just being used as entry points for the
* dv funclets. Dont run the prologue again.
*/
VMRegAnchor _(ar);
uint64_t rip = ar->m_savedRip;
if (g_context->doFCall(ar, g_context->m_pc)) {
ar->m_savedRip = rip;
return tx->uniqueStubs.resumeHelperRet;
}
// We've been asked to skip the function body
// (fb_intercept). frame, stack and pc have
// already been fixed - flag that with a negative
// return address.
return (TCA)-rip;
}
setupAfterPrologue(ar, sp);
assert(ar == g_context->m_fp);
return tx->uniqueStubs.resumeHelper;
} catch (...) {
/*
The return address is set to __fcallHelperThunk,
which has no unwind information. Its "logically"
part of the tc, but the c++ unwinder wont know
that. So point our return address at the called
function's return address (which will be in the
tc).
Note that the registers really are clean - we
cleaned them in the try above - so we just
have to tell the unwinder that.
*/
DECLARE_FRAME_POINTER(framePtr);
tl_regState = VMRegState::CLEAN;
framePtr->m_savedRip = ar->m_savedRip;
throw;
}
}
