Using this Ada example:
package B is
procedure Read_Small with Inline_Always;
end B;
package body B is
Total : Natural := 0;
procedure Read_Small is
begin
Total := Total + 1;
end Read_Small;
end B;
and
with B;
procedure M is
begin
B.Read_Small;
end M;
% gnatmake -g -O0 -m m.adb -cargs -gnatn
% gdb m
Inserting a breakpoint on Read_Small inlined function does not work:
(gdb) b read_small
Breakpoint 1 at 0x40250e: file b.adb, line 5.
(gdb) info b
Num Type Disp Enb Address What
1 breakpoint keep y 0x000000000040250e in b.doit at b.adb:5
(gdb)
In this exemple we should have two breakpoints set, one in package B and
the other one in the inlined instance inside procedure M), like below:
(gdb) b read_small
Breakpoint 1 at 0x40250e: b.adb:5. (2 locations)
(gdb) info b
Num Type Disp Enb Address What
1 breakpoint keep y <MULTIPLE>
1.1 y 0x000000000040250e in b.doit at b.adb:5
1.2 y 0x0000000000402540 in m at b.adb:5
(gdb)
Looking at the DWARF info for inlined instance of Read_Small:
<1><1526>: Abbrev Number: 2 (DW_TAG_subprogram)
<1527> DW_AT_name : ([...], offset: 0x1e82): b__read_small
<152b> DW_AT_decl_file : 2
<152c> DW_AT_decl_line : 3
<152d> DW_AT_inline : 3 (declared as inline and inlined)
[...]
<2><1547>: Abbrev Number: 4 (DW_TAG_inlined_subroutine)
<1548> DW_AT_abstract_origin: <0x1526>
<154c> DW_AT_low_pc : 0x402552
<1554> DW_AT_high_pc : 0x2b
<155c> DW_AT_call_file : 1
<155d> DW_AT_call_line : 5
<2><155e>: Abbrev Number: 0
During the parsing of DWARF info in order to produce partial DIE linked
list, the DW_TAG_inlined_subroutine were skipped thus not present in the
final partial dies.
Taking DW_TAG_inlined_subroutine in account during the parsing process
fixes the problem.
gdb/ChangeLog:
* dwarf2read.c (scan_partial_symbols, add_partial_symbol)
(add_partial_subprogram, load_partial_dies): Add
DW_TAG_inlined_subroutine handling.
gdb/testsuite/ChangeLog:
* gdb.ada/bp_inlined_func: New testcase.
b1dc1806fa