[DISPATCH-1971] Debug tracebacks don't show addresses of static functions

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.15.0

Environment

i

• Assignee: Unassigned
• Reporter: Charles E. Rolke
• Created: 19/Feb/21 21:57
• Updated: 12/Jul/21 13:21

Description

Trying to see the stack trace of a leaked qd_buffer_t is a problem when static functions do not have their addresses exported. For instance:

Leak: 2021-02-19 15:32:58.999880 -0500 type: qd_buffer_t address: 0x21aa310
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(qd_alloc+0x20c) [0x7f50038107a0]
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(new_qd_buffer_t+0x26) [0x7f5003812491]
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(qd_buffer+0xd) [0x7f5003812576]
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(grant_read_buffers+0xe2) [0x7f5003809e45]
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(handle_incoming+0x485) [0x7f500380a3aa]
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(handle_connection_event+0x4ca) [0x7f500380bc5e]
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(+0xc7aca) [0x7f5003884aca]
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(+0xc7b07) [0x7f5003884b07]
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(+0xc8a37) [0x7f5003885a37]
/home/chug/git/qpid-dispatch/build/src/libqpid-dispatch.so(+0xc8b4b) [0x7f5003885b4b]

Having a stack address shown as libqpid-dispatch.so(+0xc8b4b) [0x7f5003885b4b] is absolutely true but it doesn't reveal anything useful in this context. The stack frame identified by handle-incoming was also suppressed as a library address offset until the static attribute was removed.

Exporting addresses of non-inline, static functions could be effected by linker tricks. Or in source by making a STATIC macro that resolves to blank or to static based on the build type: the functions are no longer static and the addresses are exported.

The same problem/issue exists for gdb tracebacks.