[Driver] Add compiler option to generate a reproducer
One way to currently test the reproducers is to setup
"FORCE_CLANG_DIAGNOSTICS_CRASH=1" before invoking clang. This simulates
a crash and produces the same contents needed by the reproducers. The
reproducers are specially useful when triaging Modules issues, not only
on crashes, but also for reproducing misleading warnings, errors, etc.
Add a '-gen-reproducer' driver option to clang (or any similar name) and
give users a flag option.
Note that clang already has a -fno-crash-diagnostics, which disables the
crash reproducers. I've decided not to propose "-fcrash-diagnostics"
since it doesn't convey the ideia of reproduction despite a crash.
rdar://problem/24114619
Differential Revision: https://reviews.llvm.org/D27604
llvm-svn: 300109
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index dda7541..f36deff 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -91,7 +91,7 @@
CCCPrintBindings(false), CCPrintHeaders(false), CCLogDiagnostics(false),
CCGenDiagnostics(false), DefaultTargetTriple(DefaultTargetTriple),
CCCGenericGCCName(""), CheckInputsExist(true), CCCUsePCH(true),
- SuppressMissingInputWarning(false) {
+ GenReproducer(false), SuppressMissingInputWarning(false) {
// Provide a sane fallback if no VFS is specified.
if (!this->VFS)
@@ -620,6 +620,9 @@
CCCGenericGCCName = A->getValue();
CCCUsePCH =
Args.hasFlag(options::OPT_ccc_pch_is_pch, options::OPT_ccc_pch_is_pth);
+ GenReproducer = Args.hasFlag(options::OPT_gen_reproducer,
+ options::OPT_fno_crash_diagnostics,
+ !!::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH"));
// FIXME: DefaultTargetTriple is used by the target-prefixed calls to as/ld
// and getToolChain is const.
if (IsCLMode()) {