rollup merge of rust-lang#19954: michaelwoerister/rust-gdb

This pull request adds the `rust-gdb` shell script which starts GDB with Rust pretty printers enabled. The PR also makes `rustc` add a special `.debug_gdb_scripts` ELF section on Linux which tells GDB that the produced binary should use the Rust pretty printers.

Note that at the moment this script will only work and be installed on Linux. On Mac OS X there's `rust-lldb` which works much better there. On Windows I had too many problems making this stable. I'll give it another try soonish.

You can use this script just like you would use GDB from the command line. It will use the pretty printers from the Rust "installation" found first in PATH. E.g. if you have `~/rust/x86_64-linux-gnu/stage1/bin` in your path, it will use the pretty printer scripts in `~/rust/x86_64-linux-gnu/stage1/lib/rustlib/etc`.

Author: alexcrichton

mk/clean.mk

@@ -64,6 +64,7 @@ clean-generic-$(2)-$(1):
          -name '*.dll' -o \
          -name '*.def' -o \
          -name '*.py' -o \
+         -name '*.pyc' -o \
          -name '*.bc' \
          \) \
          | xargs rm -f
@@ -79,7 +80,7 @@ define CLEAN_HOST_STAGE_N
 
 clean$(1)_H_$(2): \
 	    $$(foreach crate,$$(CRATES),clean$(1)_H_$(2)-lib-$$(crate)) \
-	    $$(foreach tool,$$(TOOLS) $$(DEBUGGER_BIN_SCRIPTS),clean$(1)_H_$(2)-tool-$$(tool))
+	    $$(foreach tool,$$(TOOLS) $$(DEBUGGER_BIN_SCRIPTS_ALL),clean$(1)_H_$(2)-tool-$$(tool))
 	$$(Q)rm -fr $(2)/rt/libbacktrace
 
 clean$(1)_H_$(2)-tool-%:
@@ -99,7 +100,7 @@ define CLEAN_TARGET_STAGE_N
 
 clean$(1)_T_$(2)_H_$(3): \
 	    $$(foreach crate,$$(CRATES),clean$(1)_T_$(2)_H_$(3)-lib-$$(crate)) \
-	    $$(foreach tool,$$(TOOLS) $$(DEBUGGER_BIN_SCRIPTS),clean$(1)_T_$(2)_H_$(3)-tool-$$(tool))
+	    $$(foreach tool,$$(TOOLS) $$(DEBUGGER_BIN_SCRIPTS_ALL),clean$(1)_T_$(2)_H_$(3)-tool-$$(tool))
 	$$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/libmorestack.a
 	$$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/libcompiler-rt.a
 	$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/librun_pass_stage* # For unix

mk/debuggers.mk

@@ -12,26 +12,77 @@
 # Copy debugger related scripts
 ######################################################################
 
-DEBUGGER_RUSTLIB_ETC_SCRIPTS=lldb_rust_formatters.py
-DEBUGGER_BIN_SCRIPTS=rust-lldb
 
-DEBUGGER_RUSTLIB_ETC_SCRIPTS_ABS=$(foreach script,$(DEBUGGER_RUSTLIB_ETC_SCRIPTS), \
-                                     $(CFG_SRC_DIR)src/etc/$(script))
-DEBUGGER_BIN_SCRIPTS_ABS=$(foreach script,$(DEBUGGER_BIN_SCRIPTS), \
-                             $(CFG_SRC_DIR)src/etc/$(script))
+## GDB ##
+DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB=gdb_load_rust_pretty_printers.py \
+                                 gdb_rust_pretty_printing.py
+DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB_ABS=\
+    $(foreach script,$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB), \
+        $(CFG_SRC_DIR)src/etc/$(script))
+
+DEBUGGER_BIN_SCRIPTS_GDB=rust-gdb
+DEBUGGER_BIN_SCRIPTS_GDB_ABS=\
+    $(foreach script,$(DEBUGGER_BIN_SCRIPTS_GDB), \
+        $(CFG_SRC_DIR)src/etc/$(script))
+
+
+## LLDB ##
+DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB=lldb_rust_formatters.py
+DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB_ABS=\
+    $(foreach script,$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB), \
+        $(CFG_SRC_DIR)src/etc/$(script))
+
+DEBUGGER_BIN_SCRIPTS_LLDB=rust-lldb
+DEBUGGER_BIN_SCRIPTS_LLDB_ABS=\
+    $(foreach script,$(DEBUGGER_BIN_SCRIPTS_LLDB), \
+        $(CFG_SRC_DIR)src/etc/$(script))
+
+
+## ALL ##
+DEBUGGER_RUSTLIB_ETC_SCRIPTS_ALL=$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB) \
+                                 $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB)
+DEBUGGER_RUSTLIB_ETC_SCRIPTS_ALL_ABS=$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB_ABS) \
+                                     $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB_ABS)
+DEBUGGER_BIN_SCRIPTS_ALL=$(DEBUGGER_BIN_SCRIPTS_GDB) \
+                         $(DEBUGGER_BIN_SCRIPTS_LLDB)
+DEBUGGER_BIN_SCRIPTS_ALL_ABS=$(DEBUGGER_BIN_SCRIPTS_GDB_ABS) \
+                             $(DEBUGGER_BIN_SCRIPTS_LLDB_ABS)
 
-DEBUGGER_SCRIPTS_ALL=$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_ABS) $(DEBUGGER_BIN_SCRIPTS_ABS)
 
 # $(1) - the stage to copy to
 # $(2) - the host triple
 define DEF_INSTALL_DEBUGGER_SCRIPTS_HOST
 
-tmp/install-debugger-scripts$(1)_H_$(2).done: $$(DEBUGGER_SCRIPTS_ALL)
+tmp/install-debugger-scripts$(1)_H_$(2)-gdb.done: \
+  $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB_ABS) \
+  $$(DEBUGGER_BIN_SCRIPTS_GDB_ABS)
+	$(Q)mkdir -p $$(HBIN$(1)_H_$(2))
+	$(Q)mkdir -p $$(HLIB$(1)_H_$(2))/rustlib/etc
+	$(Q)install $$(DEBUGGER_BIN_SCRIPTS_GDB_ABS) $$(HBIN$(1)_H_$(2))
+	$(Q)install $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB_ABS) $$(HLIB$(1)_H_$(2))/rustlib/etc
+	$(Q)touch $$@
+
+tmp/install-debugger-scripts$(1)_H_$(2)-lldb.done: \
+  $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB_ABS) \
+  $$(DEBUGGER_BIN_SCRIPTS_LLDB_ABS)
+	$(Q)mkdir -p $$(HBIN$(1)_H_$(2))
+	$(Q)mkdir -p $$(HLIB$(1)_H_$(2))/rustlib/etc
+	$(Q)install $$(DEBUGGER_BIN_SCRIPTS_LLDB_ABS) $$(HBIN$(1)_H_$(2))
+	$(Q)install $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB_ABS) $$(HLIB$(1)_H_$(2))/rustlib/etc
+	$(Q)touch $$@
+
+tmp/install-debugger-scripts$(1)_H_$(2)-all.done: \
+  $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_ALL_ABS) \
+  $$(DEBUGGER_BIN_SCRIPTS_ALL_ABS)
 	$(Q)mkdir -p $$(HBIN$(1)_H_$(2))
 	$(Q)mkdir -p $$(HLIB$(1)_H_$(2))/rustlib/etc
-	$(Q)install $(DEBUGGER_BIN_SCRIPTS_ABS) $$(HBIN$(1)_H_$(2))
-	$(Q)install $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_ABS) $$(HLIB$(1)_H_$(2))/rustlib/etc
+	$(Q)install $$(DEBUGGER_BIN_SCRIPTS_ALL_ABS) $$(HBIN$(1)_H_$(2))
+	$(Q)install $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_ALL_ABS) $$(HLIB$(1)_H_$(2))/rustlib/etc
 	$(Q)touch $$@
+
+tmp/install-debugger-scripts$(1)_H_$(2)-none.done:
+	$(Q)touch $$@
+
 endef
 
 # Expand host make-targets for all stages
@@ -44,12 +95,36 @@ $(foreach stage,$(STAGES), \
 # $(3) is the host triple
 define DEF_INSTALL_DEBUGGER_SCRIPTS_TARGET
 
-tmp/install-debugger-scripts$(1)_T_$(2)_H_$(3).done: $$(DEBUGGER_SCRIPTS_ALL)
+tmp/install-debugger-scripts$(1)_T_$(2)_H_$(3)-gdb.done: \
+  $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB_ABS) \
+  $$(DEBUGGER_BIN_SCRIPTS_GDB_ABS)
+	$(Q)mkdir -p $$(TBIN$(1)_T_$(2)_H_$(3))
+	$(Q)mkdir -p $$(TLIB$(1)_T_$(2)_H_$(3))/rustlib/etc
+	$(Q)install $(DEBUGGER_BIN_SCRIPTS_GDB_ABS) $$(TBIN$(1)_T_$(2)_H_$(3))
+	$(Q)install $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB_ABS) $$(TLIB$(1)_T_$(2)_H_$(3))/rustlib/etc
+	$(Q)touch $$@
+
+tmp/install-debugger-scripts$(1)_T_$(2)_H_$(3)-lldb.done: \
+  $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB_ABS) \
+  $$(DEBUGGER_BIN_SCRIPTS_LLDB_ABS)
 	$(Q)mkdir -p $$(TBIN$(1)_T_$(2)_H_$(3))
 	$(Q)mkdir -p $$(TLIB$(1)_T_$(2)_H_$(3))/rustlib/etc
-	$(Q)install $(DEBUGGER_BIN_SCRIPTS_ABS) $$(TBIN$(1)_T_$(2)_H_$(3))
-	$(Q)install $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_ABS) $$(TLIB$(1)_T_$(2)_H_$(3))/rustlib/etc
+	$(Q)install $(DEBUGGER_BIN_SCRIPTS_LLDB_ABS) $$(TBIN$(1)_T_$(2)_H_$(3))
+	$(Q)install $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB_ABS) $$(TLIB$(1)_T_$(2)_H_$(3))/rustlib/etc
 	$(Q)touch $$@
+
+tmp/install-debugger-scripts$(1)_T_$(2)_H_$(3)-all.done: \
+  $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_ALL_ABS) \
+  $$(DEBUGGER_BIN_SCRIPTS_ALL_ABS)
+	$(Q)mkdir -p $$(TBIN$(1)_T_$(2)_H_$(3))
+	$(Q)mkdir -p $$(TLIB$(1)_T_$(2)_H_$(3))/rustlib/etc
+	$(Q)install $(DEBUGGER_BIN_SCRIPTS_ALL_ABS) $$(TBIN$(1)_T_$(2)_H_$(3))
+	$(Q)install $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_ALL_ABS) $$(TLIB$(1)_T_$(2)_H_$(3))/rustlib/etc
+	$(Q)touch $$@
+
+tmp/install-debugger-scripts$(1)_T_$(2)_H_$(3)-none.done:
+	$(Q)touch $$@
+
 endef
 
 # Expand target make-targets for all stages

mk/main.mk

@@ -325,6 +325,12 @@ export CFG_DISABLE_INJECT_STD_VERSION
 # Per-stage targets and runner
 ######################################################################
 
+# Valid setting-strings are 'all', 'none', 'gdb', 'lldb'
+# This 'function' will determine which debugger scripts to copy based on a
+# target triple. See debuggers.mk for more information.
+TRIPLE_TO_DEBUGGER_SCRIPT_SETTING=\
+ $(if $(findstring windows,$(1)),none,$(if $(findstring darwin,$(1)),lldb,gdb))
+
 STAGES = 0 1 2 3
 
 define SREQ
@@ -357,7 +363,7 @@ else
 HSREQ$(1)_H_$(3) = \
 	$$(HBIN$(1)_H_$(3))/rustc$$(X_$(3)) \
 	$$(MKFILE_DEPS) \
-	tmp/install-debugger-scripts$(1)_H_$(3).done
+	tmp/install-debugger-scripts$(1)_H_$(3)-$$(call TRIPLE_TO_DEBUGGER_SCRIPT_SETTING,$(3)).done
 endif
 
 # Prerequisites for using the stageN compiler to build target artifacts
@@ -372,7 +378,7 @@ SREQ$(1)_T_$(2)_H_$(3) = \
 	$$(TSREQ$(1)_T_$(2)_H_$(3)) \
 	$$(foreach dep,$$(TARGET_CRATES), \
 	    $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
-	tmp/install-debugger-scripts$(1)_T_$(2)_H_$(3).done
+	tmp/install-debugger-scripts$(1)_T_$(2)_H_$(3)-$$(call TRIPLE_TO_DEBUGGER_SCRIPT_SETTING,$(2)).done
 
 # Prerequisites for a working stageN compiler and complete set of target
 # libraries

mk/prepare.mk

@@ -144,6 +144,27 @@ prepare-target-$(2)-host-$(3)-$(1)-$(4): prepare-maybe-clean-$(4) \
           $$(call PREPARE_LIB,libcompiler-rt.a),),),)
 endef
 
+define INSTALL_GDB_DEBUGGER_SCRIPTS_COMMANDS
+	$(Q)$(PREPARE_BIN_CMD) $(DEBUGGER_BIN_SCRIPTS_GDB_ABS) $(PREPARE_DEST_BIN_DIR)
+	$(Q)$(PREPARE_LIB_CMD) $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_GDB_ABS) $(PREPARE_DEST_LIB_DIR)/rustlib/etc
+endef
+
+define INSTALL_LLDB_DEBUGGER_SCRIPTS_COMMANDS
+	$(Q)$(PREPARE_BIN_CMD) $(DEBUGGER_BIN_SCRIPTS_LLDB_ABS) $(PREPARE_DEST_BIN_DIR)
+	$(Q)$(PREPARE_LIB_CMD) $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_LLDB_ABS) $(PREPARE_DEST_LIB_DIR)/rustlib/etc
+endef
+
+define INSTALL_NO_DEBUGGER_SCRIPTS_COMMANDS
+	$(Q)echo "No debugger scripts will be installed for host $(PREPARE_HOST)"
+endef
+
+# $(1) is PREPARE_HOST
+INSTALL_DEBUGGER_SCRIPT_COMMANDS=$(if $(findstring windows,$(1)),\
+                                   $(INSTALL_NO_DEBUGGER_SCRIPTS_COMMANDS),\
+                                   $(if $(findstring darwin,$(1)),\
+                                     $(INSTALL_LLDB_DEBUGGER_SCRIPTS_COMMANDS),\
+                                     $(INSTALL_GDB_DEBUGGER_SCRIPTS_COMMANDS)))
+
 define DEF_PREPARE
 
 prepare-base-$(1): PREPARE_SOURCE_DIR=$$(PREPARE_HOST)/stage$$(PREPARE_STAGE)
@@ -170,9 +191,10 @@ prepare-host-dirs-$(1): prepare-maybe-clean-$(1)
 	$$(call PREPARE_DIR,$$(PREPARE_DEST_LIB_DIR)/rustlib/etc)
 	$$(call PREPARE_DIR,$$(PREPARE_DEST_MAN_DIR))
 
-prepare-debugger-scripts-$(1): prepare-host-dirs-$(1) $(DEBUGGER_SCRIPTS_ALL)
-	$$(Q)$$(PREPARE_BIN_CMD) $(DEBUGGER_BIN_SCRIPTS_ABS) $$(PREPARE_DEST_BIN_DIR)
-	$$(Q)$$(PREPARE_LIB_CMD) $(DEBUGGER_RUSTLIB_ETC_SCRIPTS_ABS) $$(PREPARE_DEST_LIB_DIR)/rustlib/etc
+prepare-debugger-scripts-$(1): prepare-host-dirs-$(1) \
+                               $$(DEBUGGER_BIN_SCRIPTS_ALL_ABS) \
+                               $$(DEBUGGER_RUSTLIB_ETC_SCRIPTS_ALL_ABS)
+	$$(call INSTALL_DEBUGGER_SCRIPT_COMMANDS,$$(PREPARE_HOST))
 
 $$(foreach tool,$$(PREPARE_TOOLS), \
   $$(foreach host,$$(CFG_HOST), \

src/compiletest/runtest.rs

@@ -367,7 +367,6 @@ fn run_debuginfo_gdb_test(config: &Config, props: &TestProps, testfile: &Path) {
     let DebuggerCommands {
         commands,
         check_lines,
-        use_gdb_pretty_printer,
         breakpoint_lines
     } = parse_debugger_commands(testfile, "gdb");
     let mut cmds = commands.connect("\n");
@@ -521,16 +520,11 @@ fn run_debuginfo_gdb_test(config: &Config, props: &TestProps, testfile: &Path) {
                     if header::gdb_version_to_int(version.as_slice()) >
                         header::gdb_version_to_int("7.4") {
                         // Add the directory containing the pretty printers to
-                        // GDB's script auto loading safe path ...
+                        // GDB's script auto loading safe path
                         script_str.push_str(
                             format!("add-auto-load-safe-path {}\n",
                                     rust_pp_module_abs_path.replace("\\", "\\\\").as_slice())
                                 .as_slice());
-                        // ... and also the test directory
-                        script_str.push_str(
-                            format!("add-auto-load-safe-path {}\n",
-                                    config.build_base.as_str().unwrap().replace("\\", "\\\\"))
-                                .as_slice());
                     }
                 }
                 _ => {
@@ -543,6 +537,9 @@ fn run_debuginfo_gdb_test(config: &Config, props: &TestProps, testfile: &Path) {
             // pretty printing, it just tells GDB to print values on one line:
             script_str.push_str("set print pretty off\n");
 
+            // Add the pretty printer directory to GDB's source-file search path
+            script_str.push_str(format!("directory {}\n", rust_pp_module_abs_path)[]);
+
             // Load the target executable
             script_str.push_str(format!("file {}\n",
                                         exe_file.as_str().unwrap().replace("\\", "\\\\"))
@@ -564,12 +561,6 @@ fn run_debuginfo_gdb_test(config: &Config, props: &TestProps, testfile: &Path) {
                              script_str.as_slice(),
                              "debugger.script");
 
-            if use_gdb_pretty_printer {
-                // Only emit the gdb auto-loading script if pretty printers
-                // should actually be loaded
-                dump_gdb_autoload_script(config, testfile);
-            }
-
             // run debugger script with gdb
             #[cfg(windows)]
             fn debugger() -> String {
@@ -611,19 +602,6 @@ fn run_debuginfo_gdb_test(config: &Config, props: &TestProps, testfile: &Path) {
     }
 
     check_debugger_output(&debugger_run_result, check_lines.as_slice());
-
-    fn dump_gdb_autoload_script(config: &Config, testfile: &Path) {
-        let mut script_path = output_base_name(config, testfile);
-        let mut script_file_name = script_path.filename().unwrap().to_vec();
-        script_file_name.push_all("-gdb.py".as_bytes());
-        script_path.set_filename(script_file_name.as_slice());
-
-        let script_content = "import gdb_rust_pretty_printing\n\
-                              gdb_rust_pretty_printing.register_printers(gdb.current_objfile())\n"
-                             .as_bytes();
-
-        File::create(&script_path).write(script_content).unwrap();
-    }
 }
 
 fn find_rust_src_root(config: &Config) -> Option<Path> {
@@ -781,7 +759,6 @@ struct DebuggerCommands {
     commands: Vec<String>,
     check_lines: Vec<String>,
     breakpoint_lines: Vec<uint>,
-    use_gdb_pretty_printer: bool
 }
 
 fn parse_debugger_commands(file_path: &Path, debugger_prefix: &str)
@@ -794,7 +771,6 @@ fn parse_debugger_commands(file_path: &Path, debugger_prefix: &str)
     let mut breakpoint_lines = vec!();
     let mut commands = vec!();
     let mut check_lines = vec!();
-    let mut use_gdb_pretty_printer = false;
     let mut counter = 1;
     let mut reader = BufferedReader::new(File::open(file_path).unwrap());
     for line in reader.lines() {
@@ -804,10 +780,6 @@ fn parse_debugger_commands(file_path: &Path, debugger_prefix: &str)
                     breakpoint_lines.push(counter);
                 }
 
-                if line.as_slice().contains("gdb-use-pretty-printer") {
-                    use_gdb_pretty_printer = true;
-                }
-
                 header::parse_name_value_directive(
                         line.as_slice(),
                         command_directive.as_slice()).map(|cmd| {
@@ -832,7 +804,6 @@ fn parse_debugger_commands(file_path: &Path, debugger_prefix: &str)
         commands: commands,
         check_lines: check_lines,
         breakpoint_lines: breakpoint_lines,
-        use_gdb_pretty_printer: use_gdb_pretty_printer,
     }
 }
 

src/etc/gdb_load_rust_pretty_printers.py

@@ -0,0 +1,12 @@
+# Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution and at
+# http://rust-lang.org/COPYRIGHT.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+import gdb_rust_pretty_printing
+gdb_rust_pretty_printing.register_printers(gdb.current_objfile())

src/etc/rust-gdb

@@ -0,0 +1,23 @@
+#!/bin/sh
+# Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution and at
+# http://rust-lang.org/COPYRIGHT.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+# Exit if anything fails
+set -e
+
+# Find out where the pretty printer Python module is
+RUSTC_SYSROOT=`rustc --print=sysroot`
+GDB_PYTHON_MODULE_DIRECTORY="$RUSTC_SYSROOT/lib/rustlib/etc"
+
+# Run GDB with the additional arguments that load the pretty printers
+PYTHONPATH="$PYTHONPATH:$GDB_PYTHON_MODULE_DIRECTORY" gdb \
+  -d "$GDB_PYTHON_MODULE_DIRECTORY" \
+  -iex "add-auto-load-safe-path $GDB_PYTHON_MODULE_DIRECTORY" \
+  "$@"

src/librustc/lint/builtin.rs

@@ -654,6 +654,7 @@ impl LintPass for UnusedAttributes {
             "static_assert",
             "thread_local",
             "no_debug",
+            "omit_gdb_pretty_printer_section",
             "unsafe_no_drop_flag",
 
             // used in resolve

src/librustc_llvm/lib.rs

@@ -1743,7 +1743,8 @@ extern {
                                           isOptimized: bool,
                                           Flags: *const c_char,
                                           RuntimeVer: c_uint,
-                                          SplitName: *const c_char);
+                                          SplitName: *const c_char)
+                                          -> DIDescriptor;
 
     pub fn LLVMDIBuilderCreateFile(Builder: DIBuilderRef,
                                    Filename: *const c_char,

src/librustc_trans/trans/base.rs

@@ -2676,6 +2676,8 @@ pub fn create_entry_wrapper(ccx: &CrateContext,
         unsafe {
             llvm::LLVMPositionBuilderAtEnd(bld, llbb);
 
+            debuginfo::insert_reference_to_gdb_debug_scripts_section_global(ccx);
+
             let (start_fn, args) = if use_start_lang_item {
                 let start_def_id = match ccx.tcx().lang_items.require(StartFnLangItem) {
                     Ok(id) => id,