Closed
Description
mod a {
pub struct S;
impl S {
pub fn foo(&self) {
println!("hi");
}
}
}
mod b {
use a::S;
pub struct T;
impl T {
pub fn bar(&self) {
let s = S;
s.foo();
}
}
}
fn main() {
let t = b::T;
t.bar();
}With codegen-units=2, we get breakpoints in one module that work fine, and another that do not:
godot2:tmp jdm$ rustc -C codegen-units=2 foo.rs -g
godot2:tmp jdm$ lldb foo
(lldb) target create "foo"
Current executable set to 'foo' (x86_64).
(lldb) b foo.rs:5
Breakpoint 1: where = foo`foo::a::{{impl}}::foo + 36 at foo.rs:5, address = 0x00000001000009a4
(lldb) b foo.rs:15
Breakpoint 2: no locations (pending).
WARNING: Unable to resolve breakpoint to any actual locations.
(lldb) r
Process 32398 launched: '/private/tmp/foo' (x86_64)
Process 32398 stopped
* thread #1: tid = 0x7bc9ea, 0x00000001000009a4 foo`foo::a::{{impl}}::foo(self=0x00007fff5fbff918) + 36 at foo.rs:5, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
frame #0: 0x00000001000009a4 foo`foo::a::{{impl}}::foo(self=0x00007fff5fbff918) + 36 at foo.rs:5
2 pub struct S;
3 impl S {
4 pub fn foo(&self) {
-> 5 println!("hi");
6 }
7 }
8 }
(lldb) up
frame #1: 0x00000001000009ed foo`foo::b::T::bar::h8d6dcee6b0c8bb66 + 29
foo`foo::b::T::bar::h8d6dcee6b0c8bb66 + 29:
-> 0x1000009ed: addq $0x20, %rsp
0x1000009f1: popq %rbp
0x1000009f2: retq
0x1000009f3: nopw %cs:(%rax,%rax)
(lldb) q
Quitting LLDB will kill one or more processes. Do you really want to proceed: [Y/n] y
With codegen-units=1, all breakpoints work as expected:
godot2:tmp jdm$ rustc -C codegen-units=1 foo.rs -g
godot2:tmp jdm$ lldb foo
(lldb) target create "foo"
b Current executable set to 'foo' (x86_64).
(lldb) b foo.rs:15
Breakpoint 1: where = foo`foo::b::{{impl}}::bar + 24 at foo.rs:16, address = 0x00000001000009e8
(lldb) b foo.rs:5
Breakpoint 2: where = foo`foo::a::{{impl}}::foo + 36 at foo.rs:5, address = 0x00000001000009a4
(lldb) r
Process 32422 launched: '/private/tmp/foo' (x86_64)
Process 32422 stopped
* thread #1: tid = 0x7bce5a, 0x00000001000009e8 foo`foo::b::{{impl}}::bar(self=0x00007fff5fbff938) + 24 at foo.rs:16, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
frame #0: 0x00000001000009e8 foo`foo::b::{{impl}}::bar(self=0x00007fff5fbff938) + 24 at foo.rs:16
13 impl T {
14 pub fn bar(&self) {
15 let s = S;
-> 16 s.foo();
17 }
18 }
19 }
(lldb) c
Process 32422 resuming
Process 32422 stopped
* thread #1: tid = 0x7bce5a, 0x00000001000009a4 foo`foo::a::{{impl}}::foo(self=0x00007fff5fbff918) + 36 at foo.rs:5, queue = 'com.apple.main-thread', stop reason = breakpoint 2.1
frame #0: 0x00000001000009a4 foo`foo::a::{{impl}}::foo(self=0x00007fff5fbff918) + 36 at foo.rs:5
2 pub struct S;
3 impl S {
4 pub fn foo(&self) {
-> 5 println!("hi");
6 }
7 }
8 }
(lldb) bt
* thread #1: tid = 0x7bce5a, 0x00000001000009a4 foo`foo::a::{{impl}}::foo(self=0x00007fff5fbff918) + 36 at foo.rs:5, queue = 'com.apple.main-thread', stop reason = breakpoint 2.1
* frame #0: 0x00000001000009a4 foo`foo::a::{{impl}}::foo(self=0x00007fff5fbff918) + 36 at foo.rs:5
frame #1: 0x00000001000009ed foo`foo::b::{{impl}}::bar(self=0x00007fff5fbff938) + 29 at foo.rs:16
frame #2: 0x0000000100000a11 foo`foo::main + 17 at foo.rs:23
frame #3: 0x000000010000a0fb foo`panic_unwind::__rust_maybe_catch_panic + 27 at lib.rs:98
frame #4: 0x0000000100008967 foo`std::rt::lang_start [inlined] std::panicking::try<(),fn()> + 44 at panicking.rs:436
frame #5: 0x000000010000893b foo`std::rt::lang_start [inlined] std::panic::catch_unwind<fn(),()> at panic.rs:361
frame #6: 0x000000010000893b foo`std::rt::lang_start + 347 at rt.rs:57
frame #7: 0x0000000100000a4a foo`main + 42
frame #8: 0x00007fff929365fd libdyld.dylib`start + 1
(lldb) up
frame #1: 0x00000001000009ed foo`foo::b::{{impl}}::bar(self=0x00007fff5fbff938) + 29 at foo.rs:16
13 impl T {
14 pub fn bar(&self) {
15 let s = S;
-> 16 s.foo();
17 }
18 }
19 }
(lldb)