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#include <torch/csrc/jit/frontend/source_range.h>
#include <torch/csrc/jit/serialization/source_range_serialization.h>
namespace torch {
namespace jit {
c10::optional<SourceRange> Source::findSourceRangeThatGenerated(
const SourceRange& range) {
if (!gen_ranges_) {
return c10::nullopt;
}
return gen_ranges_->findSourceRangeThatGenerated(range);
}
C10_EXPORT void SourceRange::highlight(std::ostream& out) const {
// Retrieve original SourceRange, if present.
if (auto orig_source_range = findSourceRangeThatGenerated()) {
orig_source_range->highlight(out);
out << "Serialized ";
}
print_with_context(out, CONTEXT, true, "");
}
C10_EXPORT void format_stack_trace(
std::ostream& out,
const std::vector<StackEntry>& entries) {
bool has_orig_ranges = false;
std::vector<SourceRange> orig_ranges;
// gather original ranges. if we have a situation where we do not have orig
// ranges for some frames, we still want to report them for the frames we do
// have,
// so substitute the current range for that frame
for (const StackEntry& entry : entries) {
if (auto orig_source_range = entry.range.findSourceRangeThatGenerated()) {
orig_ranges.emplace_back(std::move(orig_source_range.value()));
has_orig_ranges = true;
} else {
orig_ranges.emplace_back(entry.range);
}
}
out << "Traceback of TorchScript";
if (has_orig_ranges) {
out << ", serialized code";
}
out << " (most recent call last):\n";
for (const StackEntry& entry : entries) {
entry.range.print_with_context(
out, SourceRange::CONTEXT, true, entry.filename);
}
if (has_orig_ranges) {
out << "\nTraceback of TorchScript, original code (most recent call last):\n";
auto it = entries.begin();
for (const SourceRange& range : orig_ranges) {
range.print_with_context(
out, SourceRange::CONTEXT, true, (*it++).filename);
}
}
}
C10_EXPORT void SourceRange::print_with_context(
std::ostream& out,
size_t context,
bool highlight,
const std::string& funcname) const {
// This is an empty SourceRange, used as a sentinel value.
if (!source_) {
return;
}
const std::string& str = source_->text();
if (size() == str.size()) {
// this is just the entire file, not a subset, so print it out.
// primarily used to print out python stack traces
out << str;
return;
}
size_t range_end =
(str.size() < end()
? str.size()
: end()); // use instead of 'end()' because some ranges extend past
// the length of the source
// determine CONTEXT line range
size_t begin_line = start(); // beginning of lines to highlight
size_t end_line = range_end;
while (begin_line > 0 && str[begin_line - 1] != '\n')
--begin_line;
while (end_line < str.size() && str[end_line] != '\n')
++end_line;
AT_ASSERT(begin_line == 0 || str[begin_line - 1] == '\n');
AT_ASSERT(end_line == str.size() || str[end_line] == '\n');
size_t begin_context = begin_line; // beginning of context, CONTEXT lines
// before the highlight lines
for (size_t i = 0; begin_context > 0; --begin_context) {
if (str[begin_context - 1] == '\n') {
++i;
}
if (i >= context) {
break;
}
}
AT_ASSERT(begin_context == 0 || str[begin_context - 1] == '\n');
size_t end_context =
end_line; // end of context, CONTEXT lines after the highlight lines
for (size_t i = 0; end_context < str.size(); ++end_context) {
if (str[end_context] == '\n') {
++i;
}
if (i >= context) {
break;
}
}
AT_ASSERT(end_context == str.size() || str[end_context] == '\n');
// print out location information
if (auto flc = file_line_col()) {
std::string filename;
size_t line, col;
std::tie(filename, line, col) = *flc;
out << " File \"" << filename << "\", line " << line;
if (funcname != "") {
out << ", in " << funcname;
}
out << "\n";
}
// print out inital context
out << str.substr(begin_context, start() - begin_context);
size_t line_start = start();
size_t line_end = range_end;
if (highlight) {
line_end = start();
while (line_start < range_end) {
// move line_end to end of line
while (str[line_end] != '\n' && line_end < str.size()) {
++line_end;
}
// print line of code
auto actual_line = str.substr(line_start, (line_end - line_start) + 1);
out << actual_line;
if (actual_line.back() != '\n') {
out << "\n";
}
size_t empty_space = 0;
size_t highlight_space = 0;
size_t hightlight_begin = line_start;
size_t highlight_end = line_start;
// determine length of line which is being highlighted
while (hightlight_begin > 0 && str[hightlight_begin - 1] != '\n') {
--hightlight_begin;
}
while (highlight_end < range_end && str[highlight_end] != '\n') {
++highlight_end;
}
AT_ASSERT(hightlight_begin == 0 || str[hightlight_begin - 1] == '\n');
AT_ASSERT(highlight_end == range_end || str[highlight_end] == '\n');
// determine amount of empty space vs highlighted space
for (size_t i = hightlight_begin; i < highlight_end; i++) {
if (str[i] == ' ' || i < start()) {
empty_space++;
} else {
break;
}
}
highlight_space = highlight_end - hightlight_begin - empty_space;
if (highlight_space > 0) {
// some ranges are off and include empty white space on new lines which
// don't need to be printed
bool more_lines = false;
for (size_t i = line_end; i <= range_end; i++) {
if (str[i] != '\n' && str[i] != ' ') {
more_lines = true;
}
}
out << std::string(empty_space, ' ');
out << std::string(highlight_space, '~');
out << (more_lines && line_end != range_end ? "\n" : " <--- HERE\n");
}
++line_end;
line_start = line_end;
}
} else {
// print out code with no highlight
out << str.substr(start(), range_end - start());
}
// print out ending context
if (line_end <= str.size()) {
auto line_substr = str.substr(line_end, end_context - line_end);
out << line_substr;
if (!line_substr.empty() && line_substr.back() != '\n') {
out << "\n";
}
}
}
} // namespace jit
} // namespace torch
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