Introduce a limit on the depth of the template instantiation backtrace
we will print with each error that occurs during template
instantiation. When the backtrace is longer than that, we will print
N/2 of the innermost backtrace entries and N/2 of the outermost
backtrace entries, then skip the middle entries with a note such as:
note: suppressed 2 template instantiation contexts; use
-ftemplate-backtrace-limit=N to change the number of template
instantiation entries shown
This should eliminate some excessively long backtraces that aren't
providing any value.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101882 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 932481f..f9cfd73 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -240,6 +240,11 @@
Res.push_back("-ferror-limit");
Res.push_back(llvm::utostr(Opts.ErrorLimit));
}
+ if (Opts.TemplateBacktraceLimit != 10) {
+ Res.push_back("-ftemplate-backtrace-limit");
+ Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
+ }
+
if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
Res.push_back("-ftabstop");
Res.push_back(llvm::utostr(Opts.TabStop));
@@ -857,6 +862,8 @@
Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
+ Opts.TemplateBacktraceLimit
+ = getLastArgIntValue(Args, OPT_ftemplate_backtrace_limit, 0, Diags);
Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
DiagnosticOptions::DefaultTabStop, Diags);
if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {