<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hello,<div class=""><br class=""></div><div class="">I'd like to make FileCheck available within lldb inline tests, in addition to existing helpers like 'runCmd' and 'expect'.</div><div class=""><br class=""></div><div class="">My motivation is that several tests I'm working on can't be made as rigorous as they need to be without FileCheck-style checks. In particular, the 'matching', 'substrs', and 'patterns' arguments to runCmd/expect don't allow me to verify the ordering of checked input, to be stringent about line numbers, or to capture & reuse snippets of text from the input stream.</div><div class=""><br class=""></div><div class="">I'd curious to know if anyone else is interested or would be willing to review this (<a href="https://reviews.llvm.org/D50751" class="">https://reviews.llvm.org/D50751</a>).</div><div class=""><br class=""></div><div class="">Here's an example of an inline test which benefits from FileCheck-style checking. This test is trying to check that certain frames appear in a backtrace when stopped inside of the "sink" function. Notice that without FileCheck, it's not possible to verify the order in which frames are printed, and that dealing with line numbers would be cumbersome.</div><div class=""><br class=""></div><div class="">```</div><div class="">--- a/lldb/packages/Python/lldbsuite/test/functionalities/tail_call_frames/unambiguous_sequence/main.cpp<br class="">+++ b/lldb/packages/Python/lldbsuite/test/functionalities/tail_call_frames/unambiguous_sequence/main.cpp<br class="">@@ -9,16 +9,21 @@<br class=""> <br class=""> volatile int x;<br class=""> <br class="">+// CHECK: frame #0: {{.*}}sink() at main.cpp:[[@LINE+2]] [opt]<br class=""> void __attribute__((noinline)) sink() {<br class="">- x++; //% self.expect("bt", substrs = ['main', 'func1', 'func2', 'func3', 'sink'])<br class="">+ x++; //% self.filecheck("bt", "main.cpp")<br class=""> }<br class=""> <br class="">+// CHECK-NEXT: frame #1: {{.*}}func3() {{.*}}[opt] [artificial]<br class=""> void __attribute__((noinline)) func3() { sink(); /* tail */ }<br class=""> <br class="">+// CHECK-NEXT: frame #2: {{.*}}func2() at main.cpp:[[@LINE+1]] [opt]<br class=""> void __attribute__((disable_tail_calls, noinline)) func2() { func3(); /* regular */ }<br class=""> <br class="">+// CHECK-NEXT: frame #3: {{.*}}func1() {{.*}}[opt] [artificial]<br class=""> void __attribute__((noinline)) func1() { func2(); /* tail */ }<br class=""> <br class="">+// CHECK-NEXT: frame #4: {{.*}}main at main.cpp:[[@LINE+2]] [opt]<br class=""> int __attribute__((disable_tail_calls)) main() {<br class=""> func1(); /* regular */<br class=""> return 0;</div><div class="">```</div><div class=""><br class=""></div><div class="">For reference, here's the output of the "bt" command:</div><div class=""><br class=""></div><div class="">```</div><div class="">runCmd: bt<br class="">output: * thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1<br class=""> * frame #0: 0x000000010c6a6f64 a.out`sink() at main.cpp:14 [opt]<br class=""> frame #1: 0x000000010c6a6f70 a.out`func3() at main.cpp:15 [opt] [artificial]<br class=""> frame #2: 0x000000010c6a6f89 a.out`func2() at main.cpp:21 [opt]<br class=""> frame #3: 0x000000010c6a6f90 a.out`func1() at main.cpp:21 [opt] [artificial]<br class=""> frame #4: 0x000000010c6a6fa9 a.out`main at main.cpp:28 [opt]<br class=""></div><div class="">```</div><div class=""><br class=""></div><div class="">thanks,</div><div class="">vedant</div></body></html>