Re: [BUILDROBOT] arm-netbsdelf: Error during -fself-test (was: [PATCH] TS_OPTIMIZATION/TS_TARGET_OPTION need no chain/type)

[Jan-Benedict Glaw <jbglaw at lug-owl dot de>]

On Mon, 2017-02-27 09:19:51 +0100, Richard Biener <rguenther@suse.de> wrote:
> On Mon, 27 Feb 2017, Jan-Benedict Glaw wrote:
> > On Wed, 2017-01-11 16:28:33 +0100, Richard Biener <rguenther@suse.de> wrote:
> > > On Wed, 11 Jan 2017, Richard Biener wrote:
> > > > LTO bootstrapped on x86_64-unknown-linux-gnu, testing in progress.
> > > > 
> > > > (most "gross" are still TS_LIST having a type and TS_VEC having type
> > > > and chain, but that's been hard to fix with the C++ FE in place)
> > > 
> > > Forgot the tree-core.h part.
> > > 
> > > Re-bootstrapping testing on x86_64-unknown-linux-gnu.
> > > 
> > > Richard.
> > > 
> > > 2017-01-11  Richard Biener  <rguenther@suse.de>
> > > 
> > > 	* tree.c (initialize_tree_contains_struct): Make TS_OPTIMIZATION
> > > 	and TS_TARGET_OPTION directly derive from TS_BASE.
> > > 	* tree-core.h (tree_optimization_option): Derive from tree_base.
> > > 	(tree_target_option): Likewise.
> > 
> > This caused (or uncovered) a self-test issue on arm-netbsdelf (as run
> > by config-list.mk), like in this build:
> > http://toolchain.lug-owl.de/buildbot/show_build_details.php?id=696565
[...]
> > Reverting your patch from current HEAD lets the self-test pass. Do you
> > spot something obvious?
> 
> No, can you see which collect call in the self-test is involved?
> That is, a better backtrace, eventually when compiling the testcase
> with -O0?

Starting with selftest::run_tests(), these tests need to be run to
trigger it, all others can be omitted:

	ggc_tests_c_tests ();
	input_c_tests ();
	gimple_c_tests ();
	rtl_tests_c_tests ();
	read_rtl_function_c_tests ();
	--> forcibly_ggc_collect ();

In this constellation, we have on the stack:

(gdb) bt full
#0  0x00000000008aad77 in lookup_page_table_entry (p=0x7) at ../../gcc/gcc/ggc-page.c:635
        base = 0x23649c0
        L1 = 246
        L2 = 320
        table = 0x0
        high_bits = 0
#1  0x00000000008abe72 in ggc_set_mark (p=0x7) at ../../gcc/gcc/ggc-page.c:1532
        entry = 0x7ffff6140228
        bit = 23
        word = 0
        mask = 7730548
        __FUNCTION__ = "ggc_set_mark"
#2  0x0000000000782d27 in gt_ggc_mx_lang_tree_node (x_p=0x7ffff6140228) at ./gt-c-c-decl.h:49
        x = 0x7ffff6140228
        xlimit = 0x7
        __FUNCTION__ = "gt_ggc_mx_lang_tree_node"
#3  0x0000000000784b7a in gt_ggc_mx_lang_tree_node (x_p=0x7ffff6472000) at ./gt-c-c-decl.h:401
        i1 = 8
        l1 = 252
        x = 0x7ffff6472000
        xlimit = 0x0
        __FUNCTION__ = "gt_ggc_mx_lang_tree_node"
#4  0x00000000007849e2 in gt_ggc_mx_lang_tree_node (x_p=0x7ffff64695e8) at ./gt-c-c-decl.h:382
        x = 0x7ffff64695e8
        xlimit = 0x0
        __FUNCTION__ = "gt_ggc_mx_lang_tree_node"
#5  0x0000000000782e29 in gt_ggc_mx_lang_tree_node (x_p=0x7ffff646b6c0) at ./gt-c-c-decl.h:68
        x = 0x7ffff646b6c0
        xlimit = 0x0
        __FUNCTION__ = "gt_ggc_mx_lang_tree_node"
#6  0x0000000000af4520 in ggc_mark_root_tab (rt=0x1a19c40 <gt_ggc_r_gt_ggc_tests_h>) at ../../gcc/gcc/ggc-common.c:77
        i = 0
#7  0x0000000000af45b1 in ggc_mark_roots () at ../../gcc/gcc/ggc-common.c:94
        rt = 0x1990db8 <gt_ggc_rtab+120>
        rtp = 0x0
        rti = 0x1998850 <gt_ggc_rd_gt_c_c_decl_h+80>
        i = 360777445376
#8  0x00000000008ad064 in ggc_collect () at ../../gcc/gcc/ggc-page.c:2202
        allocated_last_gc = 4194304
        min_expand = 1258291.25
#9  0x0000000000afa314 in selftest::forcibly_ggc_collect () at ../../gcc/gcc/ggc-tests.c:36
No locals.
#10 0x000000000181357d in selftest::run_tests () at ../../gcc/gcc/selftest-run-tests.c:103
        start_time = 28000
        finish_time = 0
        elapsed_time = 9164999
#11 0x0000000000ea352c in toplev::run_self_tests (this=0x7fffffffe190) at ../../gcc/gcc/toplev.c:2048
No locals.
#12 0x0000000000ea36d3 in toplev::main (this=0x7fffffffe190, argc=20, argv=0x7fffffffe298)
    at ../../gcc/gcc/toplev.c:2125
        __FUNCTION__ = "main"
#13 0x00000000018565b2 in main (argc=20, argv=0x7fffffffe298) at ../../gcc/gcc/main.c:39
        toplev = {m_use_TV_TOTAL = true, m_init_signals = true}

Just for the moment, maybe more tonight.

MfG, JBG

-- 
      Jan-Benedict Glaw      jbglaw@lug-owl.de              +49-172-7608481
  Signature of:                           Wenn ich wach bin, träume ich.
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