Generate Libclang invocation reproducers using a new -cc1gen-reproducer

driver option

This commit is a follow up to the previous work that recorded Libclang invocations
into temporary files: r319702.

It adds a new -cc1 mode to clang: -cc1gen-reproducer. The goal of this mode is to generate
Clang reproducer files for Libclang tool invocation. The JSON format in the invocation
files is not really intended to be stable, so Libclang and Clang should be of the same version
when generating reproducers.
The new mode emits the information about the temporary files and Libclang-specific information
to stdout using JSON.

rdar://35322614

Differential Revision: https://reviews.llvm.org/D40983

llvm-svn: 329442

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/tools/driver/driver.cpp b/clang/tools/driver/driver.cpp
index 72d56a72873..32cb1b45af1 100644
--- a/clang/tools/driver/driver.cpp
+++ b/clang/tools/driver/driver.cpp
@@ -205,6 +205,8 @@ extern int cc1_main(ArrayRef<const char *> Argv, const char *Argv0,
                     void *MainAddr);
 extern int cc1as_main(ArrayRef<const char *> Argv, const char *Argv0,
                       void *MainAddr);
+extern int cc1gen_reproducer_main(ArrayRef<const char *> Argv,
+                                  const char *Argv0, void *MainAddr);
 
 static void insertTargetAndModeArgs(const ParsedClangName &NameParts,
                                     SmallVectorImpl<const char *> &ArgVector,
@@ -310,6 +312,8 @@ static int ExecuteCC1Tool(ArrayRef<const char *> argv, StringRef Tool) {
     return cc1_main(argv.slice(2), argv[0], GetExecutablePathVP);
   if (Tool == "as")
     return cc1as_main(argv.slice(2), argv[0], GetExecutablePathVP);
+  if (Tool == "gen-reproducer")
+    return cc1gen_reproducer_main(argv.slice(2), argv[0], GetExecutablePathVP);
 
   // Reject unknown tools.
   llvm::errs() << "error: unknown integrated tool '" << Tool << "'. "