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[logfile] fix handling of partial lines

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This commit is contained in:
Tim Stack 2022-08-02 16:03:39 -07:00
parent df082eaf16
commit 7b32ea9d39
2 changed files with 24 additions and 7 deletions
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6
src/line_buffer.cc
View File

@ -1154,7 +1154,11 @@ line_buffer::read_range(const file_range fr)
* Don't return anything past the last known line. The caller needs
* to try reading at the offset of the last line again.
*/
return Err(std::string("out-of-bounds"));
return Err(
fmt::format(FMT_STRING("attempt to read past the known end of the "
"file: read-offset={}; last_line_offset={}"),
fr.fr_offset,
this->lb_last_line_offset));
}
if (!(this->in_range(fr.fr_offset)

25
src/logfile.cc
View File

@ -300,7 +300,8 @@ logfile::process_prefix(shared_buffer_ref& sbr,
this->lf_out_of_time_order_count += 1;
for (size_t lpc = prescan_size;
lpc < this->lf_index.size();
lpc++) {
lpc++)
{
auto& line_to_update = this->lf_index[lpc];
line_to_update.set_time_skew(true);
@ -519,7 +520,8 @@ logfile::rebuild_index(nonstd::optional<ui_clock::time_point> deadline)
size_t old_size = this->lf_index.size();
if (old_size == 0
&& this->lf_text_format == text_format_t::TF_UNKNOWN) {
&& this->lf_text_format == text_format_t::TF_UNKNOWN)
{
file_range fr = this->lf_line_buffer.get_available();
auto avail_data = this->lf_line_buffer.read_range(fr);
@ -580,7 +582,8 @@ logfile::rebuild_index(nonstd::optional<ui_clock::time_point> deadline)
break;
}
if (begin_size == 0 && !has_format
&& li.li_file_range.fr_offset > 16 * 1024) {
&& li.li_file_range.fr_offset > 16 * 1024)
{
break;
}
#if 0
@ -595,6 +598,13 @@ logfile::rebuild_index(nonstd::optional<ui_clock::time_point> deadline)
lnav::log::watch::eval_with(*this, this->end() - 1);
}
if (li.li_partial) {
// The last read was at the end of the file, so break. We'll
// need to cycle back around to pop off this partial line in
// order to continue reading correctly.
break;
}
limit -= 1;
}
@ -620,7 +630,8 @@ logfile::rebuild_index(nonstd::optional<ui_clock::time_point> deadline)
}
if (record_rusage
&& (prev_range.fr_offset - begin_index_size) > (500 * 1024)) {
&& (prev_range.fr_offset - begin_index_size) > (500 * 1024))
{
struct rusage end_rusage;
getrusage(RUSAGE_SELF, &end_rusage);
@ -654,7 +665,8 @@ logfile::rebuild_index(nonstd::optional<ui_clock::time_point> deadline)
writable_opid_map->emplace(opid_pair);
} else {
if (opid_pair.second.otr_begin
< opid_iter->second.otr_begin) {
< opid_iter->second.otr_begin)
{
opid_iter->second.otr_begin
= opid_pair.second.otr_begin;
}
@ -950,7 +962,8 @@ logfile::line_for_offset(file_off_t off) const
this->lf_index.begin(), this->lf_index.end(), off, cmper{});
if (iter == this->lf_index.end()) {
if (this->lf_index.back().get_offset() <= off
&& off < this->lf_index_size) {
&& off < this->lf_index_size)
{
return nonstd::make_optional(iter);
}
return nonstd::nullopt;