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Diffstat (limited to 'test/sanitizer_common/TestCases/Linux/allow_user_segv.cc')
-rw-r--r--test/sanitizer_common/TestCases/Linux/allow_user_segv.cc90
1 files changed, 90 insertions, 0 deletions
diff --git a/test/sanitizer_common/TestCases/Linux/allow_user_segv.cc b/test/sanitizer_common/TestCases/Linux/allow_user_segv.cc
new file mode 100644
index 0000000000000..e17de1853eb36
--- /dev/null
+++ b/test/sanitizer_common/TestCases/Linux/allow_user_segv.cc
@@ -0,0 +1,90 @@
+// Regression test for
+// https://code.google.com/p/address-sanitizer/issues/detail?id=180
+
+// clang-format off
+// RUN: %clangxx -O0 %s -o %t
+
+// RUN: %env_tool_opts=handle_segv=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
+// RUN: %env_tool_opts=handle_segv=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_tool_opts=handle_segv=2 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
+
+// RUN: %env_tool_opts=handle_segv=0:allow_user_segv_handler=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
+// RUN: %env_tool_opts=handle_segv=1:allow_user_segv_handler=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
+// RUN: %env_tool_opts=handle_segv=2:allow_user_segv_handler=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
+
+// RUN: %env_tool_opts=handle_segv=0:allow_user_segv_handler=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
+// RUN: %env_tool_opts=handle_segv=1:allow_user_segv_handler=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_tool_opts=handle_segv=2:allow_user_segv_handler=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
+// clang-format on
+
+// Flaky errors in debuggerd with "waitpid returned unexpected pid (0)" in logcat.
+// UNSUPPORTED: android && i386-target-arch
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+struct sigaction original_sigaction_sigbus;
+struct sigaction original_sigaction_sigsegv;
+
+void User_OnSIGSEGV(int signum, siginfo_t *siginfo, void *context) {
+ fprintf(stderr, "User sigaction called\n");
+ struct sigaction original_sigaction = {};
+ if (signum == SIGBUS)
+ original_sigaction = original_sigaction_sigbus;
+ else if (signum == SIGSEGV)
+ original_sigaction = original_sigaction_sigsegv;
+ else {
+ printf("Invalid signum");
+ exit(1);
+ }
+ if (original_sigaction.sa_flags | SA_SIGINFO) {
+ if (original_sigaction.sa_sigaction)
+ original_sigaction.sa_sigaction(signum, siginfo, context);
+ } else {
+ if (original_sigaction.sa_handler)
+ original_sigaction.sa_handler(signum);
+ }
+ exit(1);
+}
+
+int DoSEGV() {
+ volatile int *x = 0;
+ return *x;
+}
+
+bool InstallHandler(int signum, struct sigaction *original_sigaction) {
+ struct sigaction user_sigaction = {};
+ user_sigaction.sa_sigaction = User_OnSIGSEGV;
+ user_sigaction.sa_flags = SA_SIGINFO;
+ if (sigaction(signum, &user_sigaction, original_sigaction)) {
+ perror("sigaction");
+ return false;
+ }
+ return true;
+}
+
+int main() {
+ // Let's install handlers for both SIGSEGV and SIGBUS, since pre-Yosemite
+ // 32-bit Darwin triggers SIGBUS instead.
+ if (InstallHandler(SIGSEGV, &original_sigaction_sigsegv) &&
+ InstallHandler(SIGBUS, &original_sigaction_sigbus)) {
+ fprintf(stderr, "User sigaction installed\n");
+ }
+ return DoSEGV();
+}
+
+// CHECK0-NOT: Sanitizer:DEADLYSIGNAL
+// CHECK0-NOT: Sanitizer: SEGV on unknown address
+// CHECK0: User sigaction installed
+// CHECK0-NEXT: User sigaction called
+
+// CHECK1: User sigaction installed
+// CHECK1-NEXT: User sigaction called
+// CHECK1-NEXT: Sanitizer:DEADLYSIGNAL
+// CHECK1: Sanitizer: SEGV on unknown address
+
+// CHECK2-NOT: User sigaction called
+// CHECK2: User sigaction installed
+// CHECK2-NEXT: Sanitizer:DEADLYSIGNAL
+// CHECK2: Sanitizer: SEGV on unknown address