Module Name: src
Committed By: kamil
Date: Wed May 23 13:18:09 UTC 2018
Modified Files:
src/tests/lib/libc/sys: t_ptrace_wait.h
Log Message:
Add new auxiliary functions in ATF ptrace(2) tests
Introduce:
- trigger_trap()
- trigger_segv()
- trigger_ill()
- trigger_fpe()
- trigger_bus()
These functions generate appropriate signals caused by crashes.
A debugger is required to collect the crashes regardless of signal masking,
catching or ignoring rules.
While there, append __used argument to can_we_set_dbregs().
Sponsored by <The NetBSD Foundation>
To generate a diff of this commit:
cvs rdiff -u -r1.5 -r1.6 src/tests/lib/libc/sys/t_ptrace_wait.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/tests/lib/libc/sys/t_ptrace_wait.h
diff -u src/tests/lib/libc/sys/t_ptrace_wait.h:1.5 src/tests/lib/libc/sys/t_ptrace_wait.h:1.6
--- src/tests/lib/libc/sys/t_ptrace_wait.h:1.5 Sat May 19 05:04:09 2018
+++ src/tests/lib/libc/sys/t_ptrace_wait.h Wed May 23 13:18:09 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.h,v 1.5 2018/05/19 05:04:09 kamil Exp $ */
+/* $NetBSD: t_ptrace_wait.h,v 1.6 2018/05/23 13:18:09 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -476,7 +476,7 @@ check_happy(unsigned n)
}
#if defined(HAVE_DBREGS)
-static bool
+static bool __used
can_we_set_dbregs(void)
{
static long euid = -1;
@@ -504,6 +504,70 @@ can_we_set_dbregs(void)
}
#endif
+static void __used
+trigger_trap(void)
+{
+
+ /* Software breakpoint causes CPU trap, translated to SIGTRAP */
+#ifdef PTRACE_BREAKPOINT_ASM
+ PTRACE_BREAKPOINT_ASM;
+#else
+ /* port me */
+#endif
+}
+
+static void __used
+trigger_segv(void)
+{
+ static volatile char *ptr = NULL;
+
+ /* Access to unmapped memory causes CPU trap, translated to SIGSEGV */
+ *ptr = 1;
+}
+
+static void __used
+trigger_ill(void)
+{
+
+ /* Illegal instruction causes CPU trap, translated to SIGILL */
+#ifdef PTRACE_ILLEGAL_ASM
+ PTRACE_ILLEGAL_ASM;
+#else
+ /* port me */
+#endif
+}
+
+static int __used
+trigger_fpe(void)
+{
+ static volatile int a = 1;
+ static volatile int b = 0;
+ static volatile int c;
+
+ /* Division by zero causes CPU trap, translated to SIGFPE */
+ c = a / b;
+
+ return c;
+}
+
+static void __used
+trigger_bus(void)
+{
+ FILE *fp;
+ char *p;
+
+ /* Open an empty file for writing. */
+ fp = tmpfile();
+ FORKEE_ASSERT_NEQ((uintmax_t)fp, (uintmax_t)NULL);
+
+ /* Map an empty file with mmap(2) to a pointer. */
+ p = mmap(0, 1, PROT_WRITE, MAP_PRIVATE, fileno(fp), 0);
+ FORKEE_ASSERT_NEQ((uintmax_t)p, (uintmax_t)MAP_FAILED);
+
+ /* Invalid memory access causes CPU trap, translated to SIGBUS */
+ *p = 'a';
+}
+
#if defined(TWAIT_HAVE_PID)
#define ATF_TP_ADD_TC_HAVE_PID(a,b) ATF_TP_ADD_TC(a,b)
#else
