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gdb: add some debug statements to solib-svr4.c

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Add a few debug statements that were useful to me when debugging why the
glibc probes interface wasn't getting used.

Change-Id: Ic20744f9fc80a90f196896b0829949411620c540
This commit is contained in:
Simon Marchi
2022-11-21 14:36:36 -05:00
committed by Simon Marchi
parent e26d0dab10
commit f8baaa2b0b
1 changed files with 13 additions and 1 deletions
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14
gdb/solib-svr4.c
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@ -2168,6 +2168,9 @@ svr4_create_probe_breakpoints (svr4_info *info, struct gdbarch *gdbarch,
{ {
CORE_ADDR address = p->get_relocated_address (objfile); CORE_ADDR address = p->get_relocated_address (objfile);
solib_debug_printf ("name=%s, addr=%s", probe_info[i].name,
paddress (gdbarch, address));
create_solib_event_breakpoint (gdbarch, address); create_solib_event_breakpoint (gdbarch, address);
register_solib_event_probe (info, objfile, p, address, action); register_solib_event_probe (info, objfile, p, address, action);
} }
@ -2185,6 +2188,9 @@ svr4_find_and_create_probe_breakpoints (svr4_info *info,
struct obj_section *os, struct obj_section *os,
bool with_prefix) bool with_prefix)
{ {
SOLIB_SCOPED_DEBUG_START_END ("objfile=%s, with_prefix=%d",
os->objfile->original_name, with_prefix);
std::vector<probe *> probes[NUM_PROBES]; std::vector<probe *> probes[NUM_PROBES];
for (int i = 0; i < NUM_PROBES; i++) for (int i = 0; i < NUM_PROBES; i++)
@ -2204,6 +2210,7 @@ svr4_find_and_create_probe_breakpoints (svr4_info *info,
} }
probes[i] = find_probes_in_objfile (os->objfile, "rtld", name); probes[i] = find_probes_in_objfile (os->objfile, "rtld", name);
solib_debug_printf ("probe=%s, num found=%zu", name, probes[i].size ());
/* Ensure at least one probe for the current name was found. */ /* Ensure at least one probe for the current name was found. */
if (probes[i].empty ()) if (probes[i].empty ())
@ -2256,6 +2263,7 @@ svr4_find_and_create_probe_breakpoints (svr4_info *info,
} }
/* All probes found. Now create them. */ /* All probes found. Now create them. */
solib_debug_printf ("using probes interface");
svr4_create_probe_breakpoints (info, gdbarch, probes, os->objfile); svr4_create_probe_breakpoints (info, gdbarch, probes, os->objfile);
return true; return true;
} }
@ -2281,7 +2289,11 @@ svr4_create_solib_event_breakpoints (svr4_info *info, struct gdbarch *gdbarch,
if (os == nullptr if (os == nullptr
|| (!svr4_find_and_create_probe_breakpoints (info, gdbarch, os, false) || (!svr4_find_and_create_probe_breakpoints (info, gdbarch, os, false)
&& !svr4_find_and_create_probe_breakpoints (info, gdbarch, os, true))) && !svr4_find_and_create_probe_breakpoints (info, gdbarch, os, true)))
create_solib_event_breakpoint (gdbarch, address); {
solib_debug_printf ("falling back to r_brk breakpoint: addr=%s",
paddress (gdbarch, address));
create_solib_event_breakpoint (gdbarch, address);
}
} }
/* Helper function for gdb_bfd_lookup_symbol. */ /* Helper function for gdb_bfd_lookup_symbol. */