void dirtySymbols(SymbolMap &map, const Set<uint32_t> &dirty)
{
SymbolMap::iterator it = map.begin();
while (it != map.end()) {
if (dirty.contains(it->first.fileId())) {
map.erase(it++);
} else {
it->second->dirty(dirty);
++it;
}
}
}
static void LoadSymbols() {
butil::Timer tm;
tm.start();
butil::ScopedFILE fp(fopen("/proc/self/maps", "r"));
if (fp == NULL) {
return;
}
char* line = NULL;
size_t line_len = 0;
ssize_t nr = 0;
while ((nr = getline(&line, &line_len, fp.get())) != -1) {
butil::StringSplitter sp(line, line + line_len, ' ');
if (sp == NULL) {
continue;
}
char* endptr;
uintptr_t start_addr = strtoull(sp.field(), &endptr, 16);
if (*endptr != '-') {
continue;
}
++endptr;
uintptr_t end_addr = strtoull(endptr, &endptr, 16);
if (*endptr != ' ') {
continue;
}
++sp;
// ..x. must be executable
if (sp == NULL || sp.length() != 4 || sp.field()[2] != 'x') {
continue;
}
++sp;
if (sp == NULL) {
continue;
}
size_t offset = strtoull(sp.field(), &endptr, 16);
if (*endptr != ' ') {
continue;
}
//skip $4~$5
for (int i = 0; i < 3; ++i) {
++sp;
}
if (sp == NULL) {
continue;
}
size_t n = sp.length();
if (sp.field()[n-1] == '\n') {
--n;
}
std::string path(sp.field(), n);
if (!HasExt(path, ".so") && !HasExt(path, ".dll") &&
!HasExt(path, ".dylib") && !HasExt(path, ".bundle")) {
continue;
}
LibInfo info;
info.start_addr = start_addr;
info.end_addr = end_addr;
info.offset = offset;
info.path = path;
ExtractSymbolsFromBinary(symbol_map, info);
}
free(line);
LibInfo info;
info.start_addr = 0;
info.end_addr = std::numeric_limits<uintptr_t>::max();
info.offset = 0;
info.path = program_invocation_name;
ExtractSymbolsFromBinary(symbol_map, info);
butil::Timer tm2;
tm2.start();
size_t num_removed = 0;
bool last_is_empty = false;
for (SymbolMap::iterator
it = symbol_map.begin(); it != symbol_map.end();) {
if (it->second.empty()) {
if (last_is_empty) {
symbol_map.erase(it++);
++num_removed;
} else {
++it;
}
last_is_empty = true;
} else {
++it;
}
}
tm2.stop();
RPC_VLOG_IF(num_removed) << "Removed " << num_removed << " entries in "
<< tm2.m_elapsed() << "ms";
tm.stop();
RPC_VLOG << "Loaded all symbols in " << tm.m_elapsed() << "ms";
}