[lldb][JITLoaderGDB] Test debug support in llvm-jitlink

[sgraenitz]

Summary

LLVM OrcJIT is shifting from RuntimeDyld to JITLink. Starting with D96627 I am planning to add debug support. It would be great to have test coverage for it in LLDB early on.

[labath]

sounds reasonable.

[sgraenitz]

Thanks for taking a look. Planning to to give this a try as soon as JITLink support landed.

[sgraenitz]

For the entry point, prefer lli over llvm-jitlink. D97339 added debug support for JITLink in lli.

lldb/test/Shell/Breakpoint/jit-loader_jitlink_elf.test

 # REQUIRES: target-x86_64
 # XFAIL: system-windows
 
-# RUN: %clang -g -S -emit-llvm --target=x86_64-unknown-unknown-elf -o %t.ll %p/Inputs/jitbp.cpp
-# RUN: %lldb -b -o 'settings set plugin.jit-loader.gdb.enable on' -o 'b jitbp' -o 'run -jit-kind=mcjit %t.ll' lli | FileCheck %s
+# JITLink is the Orc-specific JIT linker implementation.
+#
+# RUN: %clang -g -S -emit-llvm -fPIC --target=x86_64-unknown-unknown-elf \
+# RUN:        -o %t.ll %p/Inputs/jitbp.cpp
+# RUN: %lldb -b -o 'settings set plugin.jit-loader.gdb.enable on' -o 'b jitbp' \
+# RUN:          -o 'run --jit-kind=orc-lazy --per-module-lazy --jit-linker=jitlink %t.ll' \
+# RUN:          lli | FileCheck %s
 
 # CHECK: Breakpoint 1: no locations (pending).
-# CHECK: (lldb) run -jit-kind=mcjit {{.*}}/jitbp_elf.test.tmp.ll
+# CHECK: (lldb) run {{.*}}
 # CHECK: Process {{.*}} stopped
 # CHECK: JIT(0x{{.*}})`jitbp() at jitbp.cpp:1:15
 # CHECK: -> 1    int jitbp() { return 0; }
 # CHECK:                       ^
 # CHECK:    2    int main() { return jitbp(); }
 # CHECK: Process {{.*}} launched: {{.*}}

lldb/test/Shell/Breakpoint/jit-loader_rtdyld_elf.test

 # REQUIRES: target-x86_64
 # XFAIL: system-windows
 
-# RUN: %clang -g -S -emit-llvm --target=x86_64-unknown-unknown-elf -o %t.ll %p/Inputs/jitbp.cpp
-# RUN: %lldb -b -o 'settings set plugin.jit-loader.gdb.enable on' -o 'b jitbp' -o 'run -jit-kind=mcjit %t.ll' lli | FileCheck %s
+# RuntimeDyld can be used to link and load emitted code for both, MCJIT and Orc.
+#
+# RUN: %clang -g -S -emit-llvm --target=x86_64-unknown-unknown-elf \
+# RUN:        -o %t.ll %p/Inputs/jitbp.cpp
+#
+# RUN: %lldb -b -o 'settings set plugin.jit-loader.gdb.enable on' -o 'b jitbp' \
+# RUN:          -o 'run --jit-kind=mcjit %t.ll' \
+# RUN:          lli | FileCheck %s
+#
+# RUN: %lldb -b -o 'settings set plugin.jit-loader.gdb.enable on' -o 'b jitbp' \
+# RUN:          -o 'run --jit-kind=orc-lazy --per-module-lazy --jit-linker=rtdyld %t.ll' \
+# RUN:          lli | FileCheck %s
 
 # CHECK: Breakpoint 1: no locations (pending).
-# CHECK: (lldb) run -jit-kind=mcjit {{.*}}/jitbp_elf.test.tmp.ll
+# CHECK: (lldb) run {{.*}}
 # CHECK: Process {{.*}} stopped
 # CHECK: JIT(0x{{.*}})`jitbp() at jitbp.cpp:1:15
 # CHECK: -> 1    int jitbp() { return 0; }
 # CHECK:                       ^
 # CHECK:    2    int main() { return jitbp(); }
 # CHECK: Process {{.*}} launched: {{.*}}