Add an option to not handle DWARF inter-compilation unit references in Linux dump_syms.

This saves a lot of memory for dump_syms.

Review URL: https://breakpad.appspot.com/565002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1163 4c0a9323-5329-0410-9bdc-e9ce6186880e

1 files changed, 20 insertions, 10 deletions

diff --git a/src/tools/linux/dump_syms/dump_syms.cc b/src/tools/linux/dump_syms/dump_syms.cc
index f58952ed..c8ade33a 100644
--- a/src/tools/linux/dump_syms/dump_syms.cc
+++ b/src/tools/linux/dump_syms/dump_syms.cc
@@ -43,33 +43,43 @@ int usage(const char* self) {
           "[directories-for-debug-file]\n\n", self);
   fprintf(stderr, "Options:\n");
   fprintf(stderr, "  -c    Do not generate CFI section\n");
+  fprintf(stderr, "  -r    Do not handle inter-compilation unit references\n");
   return 1;
 }
 
 int main(int argc, char **argv) {
-  if (argc < 2 || argc > 4)
+  if (argc < 2)
     return usage(argv[0]);
 
   bool cfi = true;
-  int binary_index = 1;
-  if (strcmp("-c", argv[1]) == 0) {
-    cfi = false;
-    ++binary_index;
+  bool handle_inter_cu_refs = true;
+  int arg_index = 1;
+  while (arg_index < argc && strlen(argv[arg_index]) > 0 &&
+         argv[arg_index][0] == '-') {
+    if (strcmp("-c", argv[arg_index]) == 0) {
+      cfi = false;
+    } else if (strcmp("-r", argv[arg_index]) == 0) {
+      handle_inter_cu_refs = false;
+    } else {
+      return usage(argv[0]);
+    }
+    ++arg_index;
   }
-  if (!cfi && argc == 2)
+  if (arg_index == argc)
     return usage(argv[0]);
 
-  const char *binary;
+  const char* binary;
   std::vector<string> debug_dirs;
-  binary = argv[binary_index];
-  for (int debug_dir_index = binary_index + 1;
+  binary = argv[arg_index];
+  for (int debug_dir_index = arg_index + 1;
        debug_dir_index < argc;
        ++debug_dir_index) {
     debug_dirs.push_back(argv[debug_dir_index]);
   }
 
   SymbolData symbol_data = cfi ? ALL_SYMBOL_DATA : NO_CFI;
-  if (!WriteSymbolFile(binary, debug_dirs, symbol_data, std::cout)) {
+  google_breakpad::DumpOptions options(symbol_data, handle_inter_cu_refs);
+  if (!WriteSymbolFile(binary, debug_dirs, options, std::cout)) {
     fprintf(stderr, "Failed to write symbol file.\n");
     return 1;
   }