rdhindsa added a comment.
I checked the status with both gdb and lldb using test case added here. It
looks like breakpoint on main doesn't get hit even for gdb when called through
ld.so. However, breakpoint on shared library functions is supported by gdb.
With this patch, we are now able to set breakpoint on functions in shared
libraries as supported by gdb.
bin/lldb -- /lib64/ld-linux-x86-64.so.2 --library-path $PWD ./a.out
(lldb) target create "/lib64/ld-linux-x86-64.so.2"
Current executable set to '/lib64/ld-linux-x86-64.so.2' (x86_64).
(lldb) settings set -- target.run-args "--library-path" "........" "./a.out"
(lldb) b main
Breakpoint 1: no locations (pending).
WARNING: Unable to resolve breakpoint to any actual locations.
(lldb) b get_signal_crash
Breakpoint 2: no locations (pending).
WARNING: Unable to resolve breakpoint to any actual locations.
(lldb) run
Process 526132 launched: '/lib64/ld-linux-x86-64.so.2' (x86_64)
1 location added to breakpoint 2
Process 526132 stopped
* thread #1, name = 'ld-linux-x86-64', stop reason = breakpoint 2.1
frame #0: 0x00007ffff7fa1110 libsignal_file.so`get_signal_crash()
gdb --args /lib64/ld-linux-x86-64.so.2 --library-path $PWD ./a.out
(gdb) b main
Function "main" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (main) pending.
(gdb) b get_signal_crash
Function "get_signal_crash" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 2 (get_signal_crash) pending.
(gdb) run
Starting program: /lib64/ld-linux-x86-64.so.2 --library-path ...... ./a.out
Breakpoint 2, 0x00007ffff7fa1114 in get_signal_crash()
This patch adds the support for shared library load. Do you think if it is okay
if the functionality to be able to breakpoint on the main executable is added
as next step?
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D108061/new/
https://reviews.llvm.org/D108061
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