void StackmapJITEventListener::NotifyObjectEmitted(const llvm::object::ObjectFile& Obj,
const llvm::RuntimeDyld::LoadedObjectInfo& L) {
// llvm::outs() << "An object has been emitted:\n";
llvm_error_code code;
for (const auto& sec : Obj.sections()) {
llvm::StringRef name;
code = sec.getName(name);
assert(!code);
if (name == ".llvm_stackmaps") {
assert(stackmap_address == 0);
stackmap_address = L.getSectionLoadAddress(name);
assert(stackmap_address > 0);
}
}
}
virtual void NotifyObjectEmitted(const llvm::object::ObjectFile& Obj,
const llvm::RuntimeDyld::LoadedObjectInfo& L) {
static StatCounter code_bytes("code_bytes");
code_bytes.log(Obj.getData().size());
llvm_error_code code;
for (const auto& sym : Obj.symbols()) {
llvm::object::section_iterator section(Obj.section_end());
code = sym.getSection(section);
assert(!code);
bool is_text;
#if LLVMREV < 219314
code = section->isText(is_text);
assert(!code);
#else
is_text = section->isText();
#endif
if (!is_text)
continue;
llvm::StringRef name;
code = sym.getName(name);
assert(!code);
uint64_t size;
code = sym.getSize(size);
assert(!code);
if (name == ".text")
continue;
uint64_t sym_addr = L.getSymbolLoadAddress(name);
assert(sym_addr);
g.func_addr_registry.registerFunction(name.data(), (void*)sym_addr, size, NULL);
}
}
virtual void NotifyObjectEmitted(const llvm::object::ObjectFile& Obj,
const llvm::RuntimeDyld::LoadedObjectInfo& L) {
std::unique_ptr<llvm::DIContext> Context(llvm::DIContext::getDWARFContext(Obj));
assert(g.cur_cf);
uint64_t func_addr = 0; // remains 0 until we find a function
// Search through the symbols to find the function that got JIT'ed.
// (We only JIT one function at a time.)
for (const auto& sym : Obj.symbols()) {
llvm::object::SymbolRef::Type SymType;
if (sym.getType(SymType) || SymType != llvm::object::SymbolRef::ST_Function)
continue;
llvm::StringRef Name;
uint64_t Size;
if (sym.getName(Name) || sym.getSize(Size))
continue;
// Found a function!
assert(!func_addr);
func_addr = L.getSymbolLoadAddress(Name);
assert(func_addr);
// TODO this should be the Python name, not the C name:
#if LLVMREV < 208921
llvm::DILineInfoTable lines = Context->getLineInfoForAddressRange(
func_addr, Size, llvm::DILineInfoSpecifier::FunctionName | llvm::DILineInfoSpecifier::FileLineInfo
| llvm::DILineInfoSpecifier::AbsoluteFilePath);
#else
llvm::DILineInfoTable lines = Context->getLineInfoForAddressRange(
func_addr, Size,
llvm::DILineInfoSpecifier(llvm::DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath,
llvm::DILineInfoSpecifier::FunctionNameKind::LinkageName));
#endif
if (VERBOSITY() >= 3) {
for (int i = 0; i < lines.size(); i++) {
printf("%s:%d, %s: %lx\n", lines[i].second.FileName.c_str(), lines[i].second.Line,
lines[i].second.FunctionName.c_str(), lines[i].first);
}
}
assert(g.cur_cf->code_start == 0);
g.cur_cf->code_start = func_addr;
g.cur_cf->code_size = Size;
cf_registry.registerCF(g.cur_cf);
}
assert(func_addr);
// Libunwind support:
bool found_text = false, found_eh_frame = false;
uint64_t text_addr = -1, text_size = -1;
uint64_t eh_frame_addr = -1, eh_frame_size = -1;
for (const auto& sec : Obj.sections()) {
llvm::StringRef name;
llvm_error_code code = sec.getName(name);
assert(!code);
uint64_t addr, size;
if (name == ".eh_frame") {
assert(!found_eh_frame);
eh_frame_addr = L.getSectionLoadAddress(name);
eh_frame_size = sec.getSize();
if (VERBOSITY() >= 2)
printf("eh_frame: %lx %lx\n", eh_frame_addr, eh_frame_size);
found_eh_frame = true;
} else if (name == ".text") {
assert(!found_text);
text_addr = L.getSectionLoadAddress(name);
text_size = sec.getSize();
if (VERBOSITY() >= 2)
printf("text: %lx %lx\n", text_addr, text_size);
found_text = true;
}
}
assert(found_text);
assert(found_eh_frame);
assert(text_addr == func_addr);
registerDynamicEhFrame(text_addr, text_size, eh_frame_addr, eh_frame_size);
}