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Implement ? suffix to "quiet" a context and exclude it from backtraces (#1800)

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Rangi
2025-08-18 21:34:58 -04:00
committed by GitHub
parent 77a105e189
commit b7e0783ae7
32 changed files with 392 additions and 139 deletions
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74
include/backtrace.hpp
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@@ -11,58 +11,74 @@
#include "style.hpp"
static constexpr uint64_t TRACE_COLLAPSE = UINT64_MAX;
struct Tracing {
uint64_t depth = 0;
bool collapse = false;
bool loud = false;
};
extern uint64_t traceDepth;
extern Tracing tracing;
bool trace_ParseTraceDepth(char const *arg);
template<typename T, typename M, typename N>
void trace_PrintBacktrace(std::vector<T> const &stack, M getName, N getLineNo) {
auto printLocation = [&](T const &item) {
size_t n = stack.size();
if (n == 0) {
return; // LCOV_EXCL_LINE
}
auto printLocation = [&](size_t i) {
T const &item = stack[n - i - 1];
style_Reset(stderr);
if (!tracing.collapse) {
fputs(" ", stderr); // Just three spaces; the fourth will be printed next
}
fprintf(stderr, " %s ", i == 0 ? "at" : "<-");
style_Set(stderr, STYLE_CYAN, true);
fputs(getName(item), stderr);
style_Set(stderr, STYLE_CYAN, false);
fprintf(stderr, "(%" PRIu32 ")", getLineNo(item));
if (!tracing.collapse) {
putc('\n', stderr);
}
};
size_t n = stack.size();
if (traceDepth == TRACE_COLLAPSE) {
if (tracing.collapse) {
fputs(" ", stderr); // Just three spaces; the fourth will be handled by the loop
}
if (tracing.depth == 0 || static_cast<size_t>(tracing.depth) >= n) {
for (size_t i = 0; i < n; ++i) {
style_Reset(stderr);
fprintf(stderr, " %s ", i == 0 ? "at" : "<-");
printLocation(stack[n - i - 1]);
}
putc('\n', stderr);
} else if (traceDepth == 0 || static_cast<size_t>(traceDepth) >= n) {
for (size_t i = 0; i < n; ++i) {
style_Reset(stderr);
fprintf(stderr, " %s ", i == 0 ? "at" : "<-");
printLocation(stack[n - i - 1]);
putc('\n', stderr);
printLocation(i);
}
} else {
size_t last = traceDepth / 2;
size_t first = traceDepth - last;
size_t skipped = n - traceDepth;
size_t last = tracing.depth / 2;
size_t first = tracing.depth - last;
size_t skipped = n - tracing.depth;
for (size_t i = 0; i < first; ++i) {
style_Reset(stderr);
fprintf(stderr, " %s ", i == 0 ? "at" : "<-");
printLocation(stack[n - i - 1]);
putc('\n', stderr);
printLocation(i);
}
style_Reset(stderr);
fprintf(stderr, " ...%zu more%s\n", skipped, last ? "..." : "");
for (size_t i = n - last; i < n; ++i) {
style_Reset(stderr);
fputs(" <- ", stderr);
printLocation(stack[n - i - 1]);
if (tracing.collapse) {
fputs(" <-", stderr);
} else {
fputs(" ", stderr); // Just three spaces; the fourth will be printed next
}
fprintf(stderr, " ...%zu more%s", skipped, last ? "..." : "");
if (!tracing.collapse) {
putc('\n', stderr);
}
for (size_t i = n - last; i < n; ++i) {
printLocation(i);
}
}
if (tracing.collapse) {
putc('\n', stderr);
}
style_Reset(stderr);
}