void NotifyObjectEmitted(const llvm::ObjectImage &Obj) {
static StatCounter code_bytes("code_bytes");
code_bytes.log(Obj.getData().size());
llvm::error_code code;
for (llvm::object::symbol_iterator I = Obj.begin_symbols(), E = Obj.end_symbols(); I != E;
#if LLVMREV < 200442
I = I.increment(code)
#else
++I
#endif
) {
llvm::object::section_iterator section(Obj.end_sections());
code = I->getSection(section);
assert(!code);
bool is_text;
code = section->isText(is_text);
assert(!code);
if (!is_text)
continue;
llvm::StringRef name;
uint64_t addr, size, offset;
code = I->getName(name);
assert(!code);
code = I->getAddress(addr);
assert(!code);
code = I->getSize(size);
assert(!code);
code = I->getFileOffset(offset);
assert(!code);
if (name == ".text")
continue;
//printf("%lx %lx %lx %s\n", addr, addr + size, offset, name.data());
g.func_addr_registry.registerFunction(name.data(), (void*)addr, size, NULL);
}
}
void StackmapJITEventListener::NotifyObjectEmitted(const llvm::ObjectImage &Obj) {
//llvm::outs() << "An object has been emitted:\n";
llvm::error_code code;
for (llvm::object::symbol_iterator I = Obj.begin_symbols(), E = Obj.end_symbols(); I != E;) {
llvm::StringRef name;
code = I->getName(name);
assert(!code);
if (name == "__LLVM_StackMaps") {
uint64_t stackmap_offset;
code = I->getFileOffset(stackmap_offset);
assert(!code);
//code = I->getSize(stackmap_size);
//assert(stackmap_size > 0);
//assert(!code);
if (VERBOSITY() >= 2) printf("Found the stackmaps at stackmap_offset 0x%lx\n", stackmap_offset);
assert(cur_map == NULL);
cur_map = new StackMap();
union {
const int8_t* i8;
const int16_t* i16;
const int32_t* i32;
const int64_t* i64;
const uint8_t* u8;
const uint16_t* u16;
const uint32_t* u32;
const uint64_t* u64;
const StackMap::Record::Location* record_loc;
const StackMap::Record::LiveOut* record_liveout;
const StackMap::StackSizeRecord* size_record;
} ptr;
const int8_t* start_ptr = ptr.i8 = (const int8_t*)Obj.getData().data() + stackmap_offset;
cur_map->header = *ptr.u32++; // header
#if LLVMREV < 200481
int nfunctions = 0;
#else
int nfunctions = *ptr.u32++;
#endif
int nconstants = *ptr.u32++;
int nrecords = *ptr.u32++;
if (VERBOSITY() >= 2) printf("%d functions\n", nfunctions);
for (int i = 0; i < nfunctions; i++) {
const StackMap::StackSizeRecord &size_record = *ptr.size_record++;
cur_map->stack_size_records.push_back(size_record);
if (VERBOSITY() >= 2) printf("function %d: offset 0x%lx, stack size 0x%lx\n", i, size_record.offset, size_record.stack_size);
}
if (VERBOSITY() >= 2) printf("%d constants\n", nconstants);
for (int i = 0; i < nconstants; i++) {
uint64_t constant = *ptr.u64++;
if (VERBOSITY() >= 2) printf("Constant %d: %ld\n", i, constant);
cur_map->constants.push_back(constant);
}
if (VERBOSITY() >= 2) printf("%d records\n", nrecords);
for (int i = 0; i < nrecords; i++) {
StackMap::Record *record = new StackMap::Record();
cur_map->records.push_back(record);
record->id = *ptr.u64++;
record->offset = *ptr.u32++;
record->flags = *ptr.u16++; // reserved (record flags)
int numlocations = *ptr.u16++;
if (VERBOSITY() >= 2) printf("Stackmap record %ld at 0x%x has %d locations:\n", record->id, record->offset, numlocations);
for (int j = 0; j < numlocations; j++) {
assert(sizeof(StackMap::Record::Location) == sizeof(*ptr.u64));
const StackMap::Record::Location &r = *ptr.record_loc++;
record->locations.push_back(r);
// from http://lxr.free-electrons.com/source/tools/perf/arch/x86/util/dwarf-regs.c
// TODO this probably can be fetched more portably from the llvm target files
const char *dwarf_reg_names[] = {
"%rax",
"%rdx",
"%rcx",
"%rbx",
"%rsi",
"%rdi",
"%rbp",
"%rsp",
"%r8",
"%r9",
"%r10",
"%r11",
"%r12",
"%r13",
"%r14",
"%r15",
};
if (VERBOSITY() >= 2) {
if (r.type == 1) {
printf("Location %d: type %d (reg), reg %d (%s), offset %d\n", j, r.type, r.regnum, dwarf_reg_names[r.regnum], r.offset);
} else {
printf("Location %d: type %d, reg %d, offset %d\n", j, r.type, r.regnum, r.offset);
}
}
}
ptr.u16++; // padding
int num_live_outs = *ptr.u16++;
for (int i = 0; i < num_live_outs; i++) {
const StackMap::Record::LiveOut &r = *ptr.record_liveout++;
record->live_outs.push_back(r);
if (VERBOSITY() >= 2) {
printf("Live out %d: reg #%d (?), size %d\n", i, r.regnum, r.size);
}
}
if (num_live_outs % 2 == 0)
ptr.u32++; // pad to 8-byte boundary
}
#ifndef NDEBUG
uint64_t stackmap_size;
llvm::object::section_iterator section(Obj.end_sections());
code = I->getSection(section);
assert(!code);
code = section->getSize(stackmap_size);
assert(stackmap_size > 0);
assert(!code);
ASSERT(ptr.i8 - start_ptr == stackmap_size, "%ld %ld", ptr.i8 - start_ptr, stackmap_size);
#endif
}
#if LLVMREV < 200442
I = I.increment(code);
#else
++I;
#endif
}
}