PR10524: reduce massive-uprobe script modules' .data consumption

The general approach is to rip out task_finder_tgt's from all over the
place (including the unwindsym vmcbs, and the stap_uprobe_specs), and
instead have a small handful of them: one for all unwindsyms, and one
per abstract probed process (PID or NAME).  These are in turn shared
by all new stap_unwind_specs by index.

Before:  probe process("./stap").function("*")

-rw-r--r--. 1 fche users 11775283 2009-09-08 20:26 /var/tmp/fche/systemtap/cache/96/stap_96c0479d674db55ec98d8a8750a790e7_7989596.ko
   text    data     bss     dec     hex filename
 445158 8351944 4306472 13103574 c7f1d6 /var/tmp/fche/systemtap/cache/96/stap_96c0479d674db55ec98d8a8750a790e7_7989596.ko

After: (Note how data shrank, though text gained a bit in const-init-data.)

-rw-r--r--. 1 fche users  4021569 2009-09-08 20:27 /var/tmp/fche/systemtap/cache/e4/stap_e46e88634efd850b1586e81c231c239a_8058419.ko
   text    data     bss     dec     hex filename
1896511    2192 4324808 6223511  5ef697 /var/tmp/fche/systemtap/cache/e4/stap_e46e88634efd850b1586e81c231c239a_8058419.ko

* tapsets.cxx (uprobe_derived_probe_group): Rewrite emit_module_decls,
  and adjust emit_module_init.
* runtime/sym.c (_stp_sym_init): Initialize unwindsyms-shared vmcb.
* runtime/sym.h (_stp_module): Remove *vmcb field.
* translate.cxx (emit_module_init, dump_unwindsyms): Adapt.
* translate.h (assert_0_indent): Flush output before possibly assert-failing.

1 files changed, 1 insertions, 1 deletions

diff --git a/translate.h b/translate.h
index d1bff678..5a0e0a4a 100644
--- a/translate.h
+++ b/translate.h
@@ -33,7 +33,7 @@ public:
 
   std::ostream& newline (int indent = 0);
   void indent (int indent = 0);
-  void assert_0_indent () { assert (tablevel == 0); }
+  void assert_0_indent () { o << std::flush; assert (tablevel == 0); }
   std::ostream& line();
 
   std::ostream::pos_type tellp() { return o.tellp(); }