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authorJim Wilson <jimw@sifive.com>2019-01-13 15:48:09 -0800
committerPalmer Dabbelt <palmer@sifive.com>2019-02-13 14:25:00 -0800
commit85bd1ddbdfdfd13cfd06f7c367519b6ed3360843 (patch)
treeb129acc357887fb5345ff240d4521ddb862630bf /elf/Makefile
parent107562682c8f6a5736a0a8257428c15a3c68a165 (diff)
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RISC-V: Fix elfutils testsuite unwind failures.
The clone.S patch fixes 2 elfutils testsuite unwind failures, where the
backtrace gets stuck repeating __thread_start until we hit the backtrace
limit.  This was confirmed by building and installing a patched glibc and
then building elfutils and running its testsuite.

Unfortunately, the testcase isn't working as expected and I don't know why.
The testcase passes even when my clone.S patch is not installed.  The testcase
looks logically similarly to the elfutils testcases that are failing.  Maybe
there is a subtle difference in how the glibc unwinding works versus the
elfutils unwinding?  I don't have good gdb pthread support yet, so I haven't
found a way to debug this.  Anyways, I don't know if the testcase is useful or
not.  If the testcase isn't useful then maybe the clone.S patch is OK without
a testcase?

Jim

	[BZ #24040]
	* elf/Makefile (CFLAGS-tst-unwind-main.c): Add -DUSE_PTHREADS=0.
	* elf/tst-unwind-main.c: If USE_PTHEADS, include pthread.h and error.h
	(func): New.
	(main): If USE_PTHREADS, call pthread_create to run func.  Otherwise
	call func directly.
	* nptl/Makefile (tests): Add tst-unwind-thread.
	(CFLAGS-tst-unwind-thread.c): Define.
	* nptl/tst-unwind-thread.c: New file.
	* sysdeps/unix/sysv/linux/riscv/clone.S (__thread_start): Mark ra
	as undefined.
Diffstat (limited to 'elf/Makefile')
-rw-r--r--elf/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/elf/Makefile b/elf/Makefile
index 5c625b89fa..faec577d1c 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -1512,4 +1512,4 @@ $(objpfx)tst-big-note: $(objpfx)tst-big-note-lib.so
 
 $(objpfx)tst-unwind-ctor: $(objpfx)tst-unwind-ctor-lib.so
 
-CFLAGS-tst-unwind-main.c += -funwind-tables
+CFLAGS-tst-unwind-main.c += -funwind-tables -DUSE_PTHREADS=0