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[Fuchsia] Create the death test child process in a separate job.

This creates a separate job to launch the child process into. The
exception port can then be attached to the new job before the child
process is launched, solving a potential race condition.

PiperOrigin-RevId: 219366531
This commit is contained in:
Abseil Team 2018-10-30 17:29:30 -04:00 committed by Gennadiy Civil
parent e857f9cdd9
commit 71d4fc8d76
1 changed files with 19 additions and 8 deletions
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27
googletest/src/gtest-death-test.cc
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@ -70,6 +70,7 @@
# include <lib/zx/process.h>
# include <zircon/processargs.h>
# include <zircon/syscalls.h>
# include <zircon/syscalls/policy.h>
# include <zircon/syscalls/port.h>
# endif // GTEST_OS_FUCHSIA
@ -1023,19 +1024,29 @@ DeathTest::TestRole FuchsiaDeathTest::AssumeRole() {
add_stderr_action->fd.local_fd = stderr_producer_fd;
add_stderr_action->fd.target_fd = STDERR_FILENO;
// Spawn the child process.
status = fdio_spawn_etc(
ZX_HANDLE_INVALID, FDIO_SPAWN_CLONE_ALL, args.Argv()[0], args.Argv(),
nullptr, 2, spawn_actions, child_process_.reset_and_get_address(),
nullptr);
// Create a child job.
zx_handle_t child_job = ZX_HANDLE_INVALID;
status = zx_job_create(zx_job_default(), 0, & child_job);
GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
zx_policy_basic_t policy;
policy.condition = ZX_POL_NEW_ANY;
policy.policy = ZX_POL_ACTION_ALLOW;
status = zx_job_set_policy(
child_job, ZX_JOB_POL_RELATIVE, ZX_JOB_POL_BASIC, &policy, 1);
GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
// Create an exception port and attach it to the |child_process_|, to allow
// Create an exception port and attach it to the |child_job|, to allow
// us to suppress the system default exception handler from firing.
status = zx::port::create(0, &port_);
GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
status = child_process_.bind_exception_port(
port_, 0 /* key */, 0 /*options */);
status = zx_task_bind_exception_port(
child_job, port_.get(), 0 /* key */, 0 /*options */);
GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
// Spawn the child process.
status = fdio_spawn_etc(
child_job, FDIO_SPAWN_CLONE_ALL, args.Argv()[0], args.Argv(), nullptr,
2, spawn_actions, child_process_.reset_and_get_address(), nullptr);
GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
set_spawned(true);