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-rw-r--r--test/syscalls/linux/BUILD1
-rw-r--r--test/syscalls/linux/proc.cc192
2 files changed, 90 insertions, 103 deletions
diff --git a/test/syscalls/linux/BUILD b/test/syscalls/linux/BUILD
index 5399d8106..4509b5e55 100644
--- a/test/syscalls/linux/BUILD
+++ b/test/syscalls/linux/BUILD
@@ -1705,6 +1705,7 @@ cc_binary(
"@com_google_absl//absl/time",
gtest,
"//test/util:memory_util",
+ "//test/util:multiprocess_util",
"//test/util:posix_error",
"//test/util:proc_util",
"//test/util:temp_path",
diff --git a/test/syscalls/linux/proc.cc b/test/syscalls/linux/proc.cc
index 61a421788..493042dfc 100644
--- a/test/syscalls/linux/proc.cc
+++ b/test/syscalls/linux/proc.cc
@@ -65,6 +65,7 @@
#include "test/util/file_descriptor.h"
#include "test/util/fs_util.h"
#include "test/util/memory_util.h"
+#include "test/util/multiprocess_util.h"
#include "test/util/posix_error.h"
#include "test/util/proc_util.h"
#include "test/util/temp_path.h"
@@ -2073,54 +2074,37 @@ TEST(ProcPidFile, SubprocessExited) {
SyscallFailsWithErrno(ESRCH));
}
-PosixError DirContainsImpl(absl::string_view path,
- const std::vector<std::string>& targets,
- bool strict) {
+PosixError DirContains(absl::string_view path,
+ const std::vector<std::string>& expect,
+ const std::vector<std::string>& exclude) {
ASSIGN_OR_RETURN_ERRNO(auto listing, ListDir(path, false));
- bool success = true;
- for (auto& expected_entry : targets) {
+ for (auto& expected_entry : expect) {
auto cursor = std::find(listing.begin(), listing.end(), expected_entry);
if (cursor == listing.end()) {
- success = false;
+ return PosixError(
+ ENOENT,
+ absl::StrCat("Failed to find one or more paths in '", path, "'"));
}
}
-
- if (!success) {
- return PosixError(
- ENOENT,
- absl::StrCat("Failed to find one or more paths in '", path, "'"));
- }
-
- if (strict) {
- if (targets.size() != listing.size()) {
- return PosixError(
- EINVAL,
- absl::StrCat("Expected to find ", targets.size(), " elements in '",
- path, "', but found ", listing.size()));
+ for (auto& excluded_entry : exclude) {
+ auto cursor = std::find(listing.begin(), listing.end(), excluded_entry);
+ if (cursor != listing.end()) {
+ return PosixError(ENOENT, absl::StrCat("File '", excluded_entry,
+ "' found in path '", path, "'"));
}
}
-
return NoError();
}
-PosixError DirContains(absl::string_view path,
- const std::vector<std::string>& targets) {
- return DirContainsImpl(path, targets, false);
-}
-
-PosixError DirContainsExactly(absl::string_view path,
- const std::vector<std::string>& targets) {
- return DirContainsImpl(path, targets, true);
-}
-
-PosixError EventuallyDirContainsExactly(
- absl::string_view path, const std::vector<std::string>& targets) {
+PosixError EventuallyDirContains(absl::string_view path,
+ const std::vector<std::string>& expect,
+ const std::vector<std::string>& exclude) {
constexpr int kRetryCount = 100;
const absl::Duration kRetryDelay = absl::Milliseconds(100);
for (int i = 0; i < kRetryCount; ++i) {
- auto res = DirContainsExactly(path, targets);
+ auto res = DirContains(path, expect, exclude);
if (res.ok()) {
return res;
} else if (i < kRetryCount - 1) {
@@ -2132,22 +2116,14 @@ PosixError EventuallyDirContainsExactly(
"Timed out while waiting for directory to contain files ");
}
-TEST(ProcTask, Basic) {
- EXPECT_NO_ERRNO(
- DirContains("/proc/self/task", {".", "..", absl::StrCat(getpid())}));
-}
-
-std::vector<std::string> TaskFiles(
- const std::vector<std::string>& initial_contents,
- const std::vector<pid_t>& pids) {
- return VecCat<std::string>(
- initial_contents,
- ApplyVec<std::string>([](const pid_t p) { return absl::StrCat(p); },
- pids));
+std::vector<std::string> TaskFiles(const std::vector<pid_t>& pids) {
+ return ApplyVec<std::string>([](const pid_t p) { return absl::StrCat(p); },
+ pids);
}
-std::vector<std::string> TaskFiles(const std::vector<pid_t>& pids) {
- return TaskFiles({".", "..", absl::StrCat(getpid())}, pids);
+TEST(ProcTask, Basic) {
+ EXPECT_NO_ERRNO(
+ DirContains("/proc/self/task", {".", "..", absl::StrCat(getpid())}, {}));
}
// Helper class for creating a new task in the current thread group.
@@ -2189,20 +2165,15 @@ class BlockingChild {
};
TEST(ProcTask, NewThreadAppears) {
- auto initial = ASSERT_NO_ERRNO_AND_VALUE(ListDir("/proc/self/task", false));
BlockingChild child1;
- // Use Eventually* in case a proc from ealier test is still tearing down.
- EXPECT_NO_ERRNO(EventuallyDirContainsExactly(
- "/proc/self/task", TaskFiles(initial, {child1.Tid()})));
+ EXPECT_NO_ERRNO(
+ DirContains("/proc/self/task", TaskFiles({child1.Tid()}), {}));
}
TEST(ProcTask, KilledThreadsDisappear) {
- auto initial = ASSERT_NO_ERRNO_AND_VALUE(ListDir("/proc/self/task/", false));
-
BlockingChild child1;
- // Use Eventually* in case a proc from ealier test is still tearing down.
- EXPECT_NO_ERRNO(EventuallyDirContainsExactly(
- "/proc/self/task", TaskFiles(initial, {child1.Tid()})));
+ EXPECT_NO_ERRNO(
+ DirContains("/proc/self/task", TaskFiles({child1.Tid()}), {}));
// Stat child1's task file. Regression test for b/32097707.
struct stat statbuf;
@@ -2211,26 +2182,29 @@ TEST(ProcTask, KilledThreadsDisappear) {
EXPECT_THAT(stat(child1_task_file.c_str(), &statbuf), SyscallSucceeds());
BlockingChild child2;
- EXPECT_NO_ERRNO(DirContainsExactly(
- "/proc/self/task", TaskFiles(initial, {child1.Tid(), child2.Tid()})));
+ EXPECT_NO_ERRNO(DirContains("/proc/self/task",
+ TaskFiles({child1.Tid(), child2.Tid()}), {}));
BlockingChild child3;
BlockingChild child4;
BlockingChild child5;
- EXPECT_NO_ERRNO(DirContainsExactly(
- "/proc/self/task",
- TaskFiles(initial, {child1.Tid(), child2.Tid(), child3.Tid(),
- child4.Tid(), child5.Tid()})));
+ EXPECT_NO_ERRNO(
+ DirContains("/proc/self/task",
+ TaskFiles({child1.Tid(), child2.Tid(), child3.Tid(),
+ child4.Tid(), child5.Tid()}),
+ {}));
child2.Join();
- EXPECT_NO_ERRNO(EventuallyDirContainsExactly(
- "/proc/self/task", TaskFiles(initial, {child1.Tid(), child3.Tid(),
- child4.Tid(), child5.Tid()})));
+ EXPECT_NO_ERRNO(EventuallyDirContains(
+ "/proc/self/task",
+ TaskFiles({child1.Tid(), child3.Tid(), child4.Tid(), child5.Tid()}),
+ TaskFiles({child2.Tid()})));
child1.Join();
child4.Join();
- EXPECT_NO_ERRNO(EventuallyDirContainsExactly(
- "/proc/self/task", TaskFiles(initial, {child3.Tid(), child5.Tid()})));
+ EXPECT_NO_ERRNO(EventuallyDirContains(
+ "/proc/self/task", TaskFiles({child3.Tid(), child5.Tid()}),
+ TaskFiles({child2.Tid(), child1.Tid(), child4.Tid()})));
// Stat child1's task file again. This time it should fail. See b/32097707.
EXPECT_THAT(stat(child1_task_file.c_str(), &statbuf),
@@ -2238,18 +2212,23 @@ TEST(ProcTask, KilledThreadsDisappear) {
child3.Join();
child5.Join();
- EXPECT_NO_ERRNO(EventuallyDirContainsExactly("/proc/self/task", initial));
+ EXPECT_NO_ERRNO(
+ EventuallyDirContains("/proc/self/task", {},
+ TaskFiles({child2.Tid(), child1.Tid(), child4.Tid(),
+ child3.Tid(), child5.Tid()})));
}
TEST(ProcTask, ChildTaskDir) {
BlockingChild child1;
- EXPECT_NO_ERRNO(DirContains("/proc/self/task", TaskFiles({child1.Tid()})));
+ EXPECT_NO_ERRNO(
+ DirContains("/proc/self/task", TaskFiles({child1.Tid()}), {}));
EXPECT_NO_ERRNO(DirContains(absl::StrCat("/proc/", child1.Tid(), "/task"),
- TaskFiles({child1.Tid()})));
+ TaskFiles({child1.Tid()}), {}));
}
PosixError VerifyPidDir(std::string path) {
- return DirContains(path, {"exe", "fd", "io", "maps", "ns", "stat", "status"});
+ return DirContains(path, {"exe", "fd", "io", "maps", "ns", "stat", "status"},
+ {});
}
TEST(ProcTask, VerifyTaskDir) {
@@ -2266,9 +2245,8 @@ TEST(ProcTask, VerifyTaskDir) {
// /proc/1234/task/1234/task <- should not exist
// /proc/1234/task/1235/task <- should not exist (where 1235 is in the same
// thread group as 1234).
- EXPECT_FALSE(
- DirContains(absl::StrCat("/proc/self/task/", getpid()), {"task"}).ok())
- << "Found 'task' directory in an inner directory.";
+ EXPECT_NO_ERRNO(
+ DirContains(absl::StrCat("/proc/self/task/", getpid()), {}, {"task"}));
}
TEST(ProcTask, TaskDirCannotBeDeleted) {
@@ -2299,34 +2277,42 @@ TEST(ProcTask, TaskDirCanSeekToEnd) {
}
TEST(ProcTask, VerifyTaskDirNlinks) {
- // A task directory will have 3 links if the taskgroup has a single
- // thread. For example, the following shows where the links to
- // '/proc/12345/task comes' from for a single threaded process with pid 12345:
- //
- // /proc/12345/task <-- 1 link for the directory itself
- // . <-- link from "."
- // ..
- // 12345
- // .
- // .. <-- link from ".." to parent.
- // <other contents of a task dir>
- //
- // We can't assert an absolute number of links since we don't control how many
- // threads the test framework spawns. Instead, we'll ensure creating a new
- // thread increases the number of links as expected.
-
- // Once we reach the test body, we can count on the thread count being stable
- // unless we spawn a new one.
- uint64_t initial_links = ASSERT_NO_ERRNO_AND_VALUE(Links("/proc/self/task"));
- ASSERT_GE(initial_links, 3);
-
- // For each new subtask, we should gain a new link.
- BlockingChild child1;
- EXPECT_THAT(Links("/proc/self/task"),
- IsPosixErrorOkAndHolds(initial_links + 1));
- BlockingChild child2;
- EXPECT_THAT(Links("/proc/self/task"),
- IsPosixErrorOkAndHolds(initial_links + 2));
+ const auto fn = [] {
+ // A task directory will have 3 links if the taskgroup has a single
+ // thread. For example, the following shows where the links to
+ // '/proc/12345/task' comes from for a single threaded process with pid
+ // 12345:
+ //
+ // /proc/12345/task <-- 1 link for the directory itself
+ // . <-- link from "."
+ // ..
+ // 12345
+ // .
+ // .. <-- link from ".." to parent.
+ // <other contents of a task dir>
+ //
+ // We can't assert an absolute number of links since we don't control how
+ // many threads the test framework spawns. Instead, we'll ensure creating a
+ // new thread increases the number of links as expected.
+
+ // Once we reach the test body, we can count on the thread count being
+ // stable unless we spawn a new one.
+ const uint64_t initial_links =
+ TEST_CHECK_NO_ERRNO_AND_VALUE(Links("/proc/self/task"));
+ TEST_CHECK(initial_links >= 3);
+
+ // For each new subtask, we should gain a new link.
+ BlockingChild child1;
+ uint64_t links = TEST_CHECK_NO_ERRNO_AND_VALUE(Links("/proc/self/task"));
+ TEST_CHECK(links == initial_links + 1);
+
+ BlockingChild child2;
+ links = TEST_CHECK_NO_ERRNO_AND_VALUE(Links("/proc/self/task"));
+ TEST_CHECK(links == initial_links + 2);
+ };
+ // Run as a forked process to prevent terminating tasks from other tests to
+ // show up here and race with the count.
+ EXPECT_THAT(InForkedProcess(fn), IsPosixErrorOkAndHolds(0));
}
TEST(ProcTask, CommContainsThreadNameAndTrailingNewline) {
@@ -2340,7 +2326,7 @@ TEST(ProcTask, CommContainsThreadNameAndTrailingNewline) {
}
TEST(ProcTaskNs, NsDirExistsAndHasCorrectMetadata) {
- EXPECT_NO_ERRNO(DirContains("/proc/self/ns", {"net", "pid", "user"}));
+ EXPECT_NO_ERRNO(DirContains("/proc/self/ns", {"net", "pid", "user"}, {}));
// Let's just test the 'pid' entry, all of them are very similar.
struct stat st;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 15:26:14 +0000