From d0d7f85f66a19c3110d550c3c24247f7b4f2c58a Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Mon, 21 Sep 2015 15:55:58 -0700 Subject: nptl: Fix testcases for new pthread cancellation mechanism With upcoming fix for BZ#12683, pthread cancellation does not act for: 1. If syscall is blocked but with some side effects already having taken place (e.g. a partial read or write). 2. After the syscall has returned. The main change is due the fact programs need to act in syscalls with side-effects (for instance, to avoid leak of allocated resources or handle partial read/write). This patch changes the NPTL testcase that assumes the old behavior and also changes the tst-backtrace{5,6} to ignore the cancellable wrappers. Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32, aarch64-linux-gnu, arm-linux-gnueabihf, powerpc64le-linux-gnu, powerpc-linux-gnu, sparcv9-linux-gnu, and sparc64-linux-gnu. * debug/tst-backtrace5.c (handle_signal): Avoid cancellable wrappers in backtrace analysis. * nptl/tst-cancel4.c (tf_write): Handle cancelled syscall with side-effects. (tf_send): Likewise. --- debug/tst-backtrace5.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) (limited to 'debug') diff --git a/debug/tst-backtrace5.c b/debug/tst-backtrace5.c index dfbe4c1912..5a5ce8bc79 100644 --- a/debug/tst-backtrace5.c +++ b/debug/tst-backtrace5.c @@ -69,17 +69,18 @@ handle_signal (int signum) FAIL (); return; } - /* Do not check name for signal trampoline. */ - i = 2; - if (!match (symbols[i++], "read")) + + /* Do not check name for signal trampoline or cancellable syscall + wrappers (__syscall_cancel*). */ + for (; i < n - 1; i++) + if (match (symbols[i], "read")) + break; + if (i == n - 1) { - /* Perhaps symbols[2] is __kernel_vsyscall? */ - if (!match (symbols[i++], "read")) - { - FAIL (); - return; - } + FAIL (); + return; } + for (; i < n - 1; i++) if (!match (symbols[i], "fn")) { -- cgit v1.2.3-65-gdbad