auto merge of #13726 : michaelwoerister/rust/lldb-autotests, r=alexcrichton

This pull request contains preparations for adding LLDB autotests:
+ the debuginfo tests are split into debuginfo-gdb and debuginfo-lldb
  + the `compiletest` tool is updated to support the debuginfo-lldb mode
  + tests.mk is modified to provide debuginfo-gdb and debuginfo-lldb make targets
  + GDB test cases are moved from `src/test/debug-info` to `src/test/debuginfo-gdb`
+ configure will now look for LLDB and set the appropriate CFG variables
+ the `lldb_batchmode.py` script is added to `src/etc`. It emulates GDB's batch mode

The LLDB autotests themselves are not part of this PR. Those will probable require some manual work on the test bots to make them work for the first time. Better to get these unproblematic preliminaries out of the way in a separate step.

1 files changed, 244 insertions, 0 deletions

diff --git a/src/test/debuginfo/function-arg-initialization.rs b/src/test/debuginfo/function-arg-initialization.rs
new file mode 100644
index 00000000000..d439f49fe69
--- /dev/null
+++ b/src/test/debuginfo/function-arg-initialization.rs
@@ -0,0 +1,244 @@
+// Copyright 2013-2014 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.
+
+// ignore-android: FIXME(#10381)
+
+// This test case checks if function arguments already have the correct value when breaking at the
+// first line of the function, that is if the function prologue has already been executed at the
+// first line. Note that because of the __morestack part of the prologue GDB incorrectly breaks at
+// before the arguments have been properly loaded when setting the breakpoint via the function name.
+// Therefore the setup here sets them using line numbers (so be careful when changing this file).
+
+// compile-flags:-g
+// gdb-command:set print pretty off
+// gdb-command:break function-arg-initialization.rs:139
+// gdb-command:break function-arg-initialization.rs:154
+// gdb-command:break function-arg-initialization.rs:158
+// gdb-command:break function-arg-initialization.rs:162
+// gdb-command:break function-arg-initialization.rs:166
+// gdb-command:break function-arg-initialization.rs:170
+// gdb-command:break function-arg-initialization.rs:174
+// gdb-command:break function-arg-initialization.rs:178
+// gdb-command:break function-arg-initialization.rs:182
+// gdb-command:break function-arg-initialization.rs:190
+// gdb-command:break function-arg-initialization.rs:197
+
+
+// gdb-command:run
+
+// IMMEDIATE ARGS
+// gdb-command:print a
+// gdb-check:$1 = 1
+// gdb-command:print b
+// gdb-check:$2 = true
+// gdb-command:print c
+// gdb-check:$3 = 2.5
+// gdb-command:continue
+
+// NON IMMEDIATE ARGS
+// gdb-command:print a
+// gdb-check:$4 = {a = 3, b = 4, c = 5, d = 6, e = 7, f = 8, g = 9, h = 10}
+// gdb-command:print b
+// gdb-check:$5 = {a = 11, b = 12, c = 13, d = 14, e = 15, f = 16, g = 17, h = 18}
+// gdb-command:continue
+
+// BINDING
+// gdb-command:print a
+// gdb-check:$6 = 19
+// gdb-command:print b
+// gdb-check:$7 = 20
+// gdb-command:print c
+// gdb-check:$8 = 21.5
+// gdb-command:continue
+
+// ASSIGNMENT
+// gdb-command:print a
+// gdb-check:$9 = 22
+// gdb-command:print b
+// gdb-check:$10 = 23
+// gdb-command:print c
+// gdb-check:$11 = 24.5
+// gdb-command:continue
+
+// FUNCTION CALL
+// gdb-command:print x
+// gdb-check:$12 = 25
+// gdb-command:print y
+// gdb-check:$13 = 26
+// gdb-command:print z
+// gdb-check:$14 = 27.5
+// gdb-command:continue
+
+// EXPR
+// gdb-command:print x
+// gdb-check:$15 = 28
+// gdb-command:print y
+// gdb-check:$16 = 29
+// gdb-command:print z
+// gdb-check:$17 = 30.5
+// gdb-command:continue
+
+// RETURN EXPR
+// gdb-command:print x
+// gdb-check:$18 = 31
+// gdb-command:print y
+// gdb-check:$19 = 32
+// gdb-command:print z
+// gdb-check:$20 = 33.5
+// gdb-command:continue
+
+// ARITHMETIC EXPR
+// gdb-command:print x
+// gdb-check:$21 = 34
+// gdb-command:print y
+// gdb-check:$22 = 35
+// gdb-command:print z
+// gdb-check:$23 = 36.5
+// gdb-command:continue
+
+// IF EXPR
+// gdb-command:print x
+// gdb-check:$24 = 37
+// gdb-command:print y
+// gdb-check:$25 = 38
+// gdb-command:print z
+// gdb-check:$26 = 39.5
+// gdb-command:continue
+
+// WHILE EXPR
+// gdb-command:print x
+// gdb-check:$27 = 40
+// gdb-command:print y
+// gdb-check:$28 = 41
+// gdb-command:print z
+// gdb-check:$29 = 42
+// gdb-command:continue
+
+// LOOP EXPR
+// gdb-command:print x
+// gdb-check:$30 = 43
+// gdb-command:print y
+// gdb-check:$31 = 44
+// gdb-command:print z
+// gdb-check:$32 = 45
+// gdb-command:continue
+
+#![allow(unused_variable)]
+
+
+
+
+fn immediate_args(a: int, b: bool, c: f64) {
+    ()
+}
+
+struct BigStruct {
+    a: u64,
+    b: u64,
+    c: u64,
+    d: u64,
+    e: u64,
+    f: u64,
+    g: u64,
+    h: u64
+}
+
+fn non_immediate_args(a: BigStruct, b: BigStruct) {
+    ()
+}
+
+fn binding(a: i64, b: u64, c: f64) {
+    let x = 0;
+}
+
+fn assignment(mut a: u64, b: u64, c: f64) {
+    a = b;
+}
+
+fn function_call(x: u64, y: u64, z: f64) {
+    std::io::stdio::print("Hi!")
+}
+
+fn identifier(x: u64, y: u64, z: f64) -> u64 {
+    x
+}
+
+fn return_expr(x: u64, y: u64, z: f64) -> u64 {
+    return x;
+}
+
+fn arithmetic_expr(x: u64, y: u64, z: f64) -> u64 {
+    x + y
+}
+
+fn if_expr(x: u64, y: u64, z: f64) -> u64 {
+    if x + y < 1000 {
+        x
+    } else {
+        y
+    }
+}
+
+fn while_expr(mut x: u64, y: u64, z: u64) -> u64 {
+    while x + y < 1000 {
+        x += z
+    }
+    return x;
+}
+
+fn loop_expr(mut x: u64, y: u64, z: u64) -> u64 {
+    loop {
+        x += z;
+
+        if x + y > 1000 {
+            return x;
+        }
+    }
+}
+
+fn main() {
+    immediate_args(1, true, 2.5);
+
+    non_immediate_args(
+        BigStruct {
+            a: 3,
+            b: 4,
+            c: 5,
+            d: 6,
+            e: 7,
+            f: 8,
+            g: 9,
+            h: 10
+        },
+        BigStruct {
+            a: 11,
+            b: 12,
+            c: 13,
+            d: 14,
+            e: 15,
+            f: 16,
+            g: 17,
+            h: 18
+        }
+    );
+
+    binding(19, 20, 21.5);
+    assignment(22, 23, 24.5);
+    function_call(25, 26, 27.5);
+    identifier(28, 29, 30.5);
+    return_expr(31, 32, 33.5);
+    arithmetic_expr(34, 35, 36.5);
+    if_expr(37, 38, 39.5);
+    while_expr(40, 41, 42);
+    loop_expr(43, 44, 45);
+}
+
+
+