DwarfChunk* DwarfInfo::addTracelet(TCRange range, const char* name,
const Unit *unit, const Opcode *instr, bool exit, bool inPrologue) {
DwarfChunk* chunk = NULL;
FunctionInfo* f = new FunctionInfo(range, exit);
if (name) {
f->name = std::string(name);
} else {
f->name = lookupFunction(unit, instr, exit, inPrologue, true);
}
f->file = lookupFile(unit);
TCA start = range.begin();
const TCA end = range.end();
{
Lock lock(s_lock);
FuncDB::iterator it = m_functions.lower_bound(range.begin());
FunctionInfo* fi = it->second;
if (it != m_functions.end() && fi->name == f->name &&
fi->file == f->file &&
start > fi->range.begin() &&
end > fi->range.end()) {
// XXX: verify that overlapping address come from jmp fixups
start = fi->range.end();
fi->range.truncate(end);
m_functions[end] = fi;
m_functions.erase(it);
delete(f);
f = m_functions[end];
ASSERT(f->m_chunk != NULL);
f->m_chunk->clearSynced();
f->clearPerfSynced();
} else {
m_functions[end] = f;
}
}
addLineEntries(TCRange(start, end, range.isAstubs()), unit, instr, f);
if (f->m_chunk == NULL) {
Lock lock(s_lock);
if (m_dwarfChunks.size() == 0 || m_dwarfChunks[0] == NULL) {
// new chunk of base size
chunk = new DwarfChunk();
m_dwarfChunks.push_back(chunk);
} else if (m_dwarfChunks[0]->m_functions.size()
< RuntimeOption::EvalGdbSyncChunks) {
// reuse first chunk
chunk = m_dwarfChunks[0];
chunk->clearSynced();
} else {
// compact chunks
compactChunks();
m_dwarfChunks[0] = chunk = new DwarfChunk();
}
chunk->m_functions.push_back(f);
f->m_chunk = chunk;
}
if (f->m_chunk->m_functions.size() >= RuntimeOption::EvalGdbSyncChunks) {
Lock lock(s_lock);
ElfWriter e = ElfWriter(f->m_chunk);
}
return f->m_chunk;
}
DwarfChunk* DwarfInfo::addTracelet(TCRange range,
folly::Optional<std::string> name,
const Func *func,
const Op* instr,
bool exit,
bool inPrologue) {
DwarfChunk* chunk = nullptr;
FunctionInfo* f = new FunctionInfo(range, exit);
const Unit* unit = func ? func->unit(): nullptr;
if (name) {
f->name = *name;
} else {
assert(func != nullptr);
f->name = lookupFunction(func, exit, inPrologue, true);
auto names = func->localNames();
for (int i = 0; i < func->numNamedLocals(); i++) {
f->m_namedLocals.push_back(names[i]->toCppString());
}
}
f->file = lookupFile(unit);
TCA start = range.begin();
const TCA end = range.end();
Lock lock(s_lock);
auto const it = m_functions.lower_bound(range.begin());
auto const fi = it->second;
if (it != m_functions.end() && fi->name == f->name &&
fi->file == f->file &&
start > fi->range.begin() &&
end > fi->range.end()) {
// XXX: verify that overlapping address come from jmp fixups
start = fi->range.end();
fi->range.extend(end);
m_functions[end] = fi;
m_functions.erase(it);
delete f;
f = m_functions[end];
assert(f->m_chunk != nullptr);
f->m_chunk->clearSynced();
f->clearPerfSynced();
} else {
m_functions[end] = f;
}
addLineEntries(TCRange(start, end, range.isAcold()), unit, instr, f);
if (f->m_chunk == nullptr) {
if (m_dwarfChunks.size() == 0 || m_dwarfChunks[0] == nullptr) {
// new chunk of base size
chunk = new DwarfChunk();
m_dwarfChunks.push_back(chunk);
} else if (m_dwarfChunks[0]->m_functions.size()
< RuntimeOption::EvalGdbSyncChunks) {
// reuse first chunk
chunk = m_dwarfChunks[0];
chunk->clearSynced();
} else {
// compact chunks
compactChunks();
m_dwarfChunks[0] = chunk = new DwarfChunk();
}
chunk->m_functions.push_back(f);
f->m_chunk = chunk;
}
#if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__CYGWIN__)
if (f->m_chunk->m_functions.size() >= RuntimeOption::EvalGdbSyncChunks) {
ElfWriter e = ElfWriter(f->m_chunk);
}
#endif
return f->m_chunk;
}