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author | Tom de Vries <tdevries@suse.de> | 2018-08-21 07:39:29 +0000 |
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committer | Tom de Vries <vries@gcc.gnu.org> | 2018-08-21 07:39:29 +0000 |
commit | efd9eb2979c1d01c2bea341e5faf1a682c104ff4 (patch) | |
tree | 0247b12fe1a37d3b294a4750c853f5f72752a414 /gcc/lto | |
parent | 916f27adfdf0a2aa8a8d30fa68f86d5eab226ff9 (diff) | |
download | gcc-efd9eb2979c1d01c2bea341e5faf1a682c104ff4.zip gcc-efd9eb2979c1d01c2bea341e5faf1a682c104ff4.tar.gz gcc-efd9eb2979c1d01c2bea341e5faf1a682c104ff4.tar.bz2 |
[debug] Add debug and earlydebug dumps
With the introduction of early debug, we've added a phase in the compiler which
produces information which is not visible, unless we run the compiler in the
debugger and call debug_dwarf from dwarf2out_early_finish or some such.
This patch adds dumping of "early" and "final" debug info, into .earlydebug
and .debug dump files, enabled by -fdump-earlydebug and -fdumpdebug, such that
we can follow f.i. the upper bound of a vla type from early debug:
...
DW_AT_upper_bound: location descriptor:
(0x7f0d645b7550) DW_OP_GNU_variable_value , 0
...
to final debug:
...
DW_AT_upper_bound: location descriptor:
(0x7f0d645b7550) DW_OP_fbreg 18446744073709551592, 0
(0x7f0d645b7a00) DW_OP_deref 8, 0
...
to -dA annotated assembly file:
...
.uleb128 0x3 # DW_AT_upper_bound
.byte 0x91 # DW_OP_fbreg
.sleb128 -24
.byte 0x6 # DW_OP_deref
...
The .debug file shows the same information as the annotated assembly, but in
the same format as the "early" debug info.
Bootstrapped and reg-tested on x86_64.
2018-08-21 Tom de Vries <tdevries@suse.de>
* cgraph.h (debuginfo_early_init, debuginfo_init, debuginfo_fini)
(debuginfo_start, debuginfo_stop, debuginfo_early_start)
(debuginfo_early_stop): Declare.
* cgraphunit.c (debuginfo_early_init, debuginfo_init, debuginfo_fini)
(debuginfo_start, debuginfo_stop, debuginfo_early_start)
(debuginfo_early_stop): New function.
(symbol_table::finalize_compilation_unit): Call debuginfo_early_start
and debuginfo_early_stop.
* dwarf2out.c (dwarf2out_finish, dwarf2out_early_finish): Dump dwarf.
* toplev.c (compile_file): Call debuginfo_start and debuginfo_stop.
(general_init): Call debuginfo_early_init.
(finalize): Call debuginfo_fini.
(do_compile): Call debuginfo_init.
* doc/invoke.texi (@gccoptlist): Add -fdump-debug and
-fdump-early-debug.
(@item -fdump-debug, @item -fdump-earlydebug): Add.
* lto.c (lto_main): Call debuginfo_early_start and
debuginfo_early_stop.
* gcc.c-torture/unsorted/dump-noaddr.x: Use -gno-record-gcc-switches
to avoid mismatch in .debug and .earlydebug dump files.
From-SVN: r263687
Diffstat (limited to 'gcc/lto')
-rw-r--r-- | gcc/lto/ChangeLog | 5 | ||||
-rw-r--r-- | gcc/lto/lto.c | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/gcc/lto/ChangeLog b/gcc/lto/ChangeLog index eb23997..a92317c 100644 --- a/gcc/lto/ChangeLog +++ b/gcc/lto/ChangeLog @@ -1,3 +1,8 @@ +2018-08-21 Tom de Vries <tdevries@suse.de> + + * lto.c (lto_main): Call debuginfo_early_start and + debuginfo_early_stop. + 2018-07-20 Martin Sebor <msebor@redhat.com> PR middle-end/82063 diff --git a/gcc/lto/lto.c b/gcc/lto/lto.c index 8db280e..1061889 100644 --- a/gcc/lto/lto.c +++ b/gcc/lto/lto.c @@ -3419,7 +3419,9 @@ lto_main (void) lto_promote_statics_nonwpa (); /* Annotate the CU DIE and mark the early debug phase as finished. */ + debuginfo_early_start (); debug_hooks->early_finish ("<artificial>"); + debuginfo_early_stop (); /* Let the middle end know that we have read and merged all of the input files. */ |