diff options
Diffstat (limited to 'test/syscalls')
| -rw-r--r-- | test/syscalls/linux/BUILD | 4 | ||||
| -rw-r--r-- | test/syscalls/linux/ptrace.cc | 43 |
2 files changed, 38 insertions, 9 deletions
diff --git a/test/syscalls/linux/BUILD b/test/syscalls/linux/BUILD index c94c1d5bd..88899589d 100644 --- a/test/syscalls/linux/BUILD +++ b/test/syscalls/linux/BUILD @@ -1802,10 +1802,14 @@ cc_binary( "@com_google_absl//absl/flags:flag", "@com_google_absl//absl/time", gtest, + "//test/util:file_descriptor", + "//test/util:fs_util", "//test/util:logging", + "//test/util:memory_util", "//test/util:multiprocess_util", "//test/util:platform_util", "//test/util:signal_util", + "//test/util:temp_path", "//test/util:test_util", "//test/util:thread_util", "//test/util:time_util", diff --git a/test/syscalls/linux/ptrace.cc b/test/syscalls/linux/ptrace.cc index 926690eb8..13c19d4a8 100644 --- a/test/syscalls/linux/ptrace.cc +++ b/test/syscalls/linux/ptrace.cc @@ -30,10 +30,13 @@ #include "absl/flags/flag.h" #include "absl/time/clock.h" #include "absl/time/time.h" +#include "test/util/fs_util.h" #include "test/util/logging.h" +#include "test/util/memory_util.h" #include "test/util/multiprocess_util.h" #include "test/util/platform_util.h" #include "test/util/signal_util.h" +#include "test/util/temp_path.h" #include "test/util/test_util.h" #include "test/util/thread_util.h" #include "test/util/time_util.h" @@ -113,10 +116,21 @@ TEST(PtraceTest, AttachParent_PeekData_PokeData_SignalSuppression) { // except disabled. SKIP_IF(ASSERT_NO_ERRNO_AND_VALUE(YamaPtraceScope()) > 0); - constexpr long kBeforePokeDataValue = 10; - constexpr long kAfterPokeDataValue = 20; + // Test PTRACE_POKE/PEEKDATA on both anonymous and file mappings. + const auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); + ASSERT_NO_ERRNO(Truncate(file.path(), kPageSize)); + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDWR)); + const auto file_mapping = ASSERT_NO_ERRNO_AND_VALUE(Mmap( + nullptr, kPageSize, PROT_READ | PROT_WRITE, MAP_SHARED, fd.get(), 0)); - volatile long word = kBeforePokeDataValue; + constexpr long kBeforePokeDataAnonValue = 10; + constexpr long kAfterPokeDataAnonValue = 20; + constexpr long kBeforePokeDataFileValue = 0; // implicit, due to truncate() + constexpr long kAfterPokeDataFileValue = 30; + + volatile long anon_word = kBeforePokeDataAnonValue; + auto* file_word_ptr = static_cast<volatile long*>(file_mapping.ptr()); pid_t const child_pid = fork(); if (child_pid == 0) { @@ -134,12 +148,22 @@ TEST(PtraceTest, AttachParent_PeekData_PokeData_SignalSuppression) { MaybeSave(); TEST_CHECK(WIFSTOPPED(status) && WSTOPSIG(status) == SIGSTOP); - // Replace the value of word in the parent process with kAfterPokeDataValue. - long const parent_word = ptrace(PTRACE_PEEKDATA, parent_pid, &word, 0); + // Replace the value of anon_word in the parent process with + // kAfterPokeDataAnonValue. + long parent_word = ptrace(PTRACE_PEEKDATA, parent_pid, &anon_word, 0); + MaybeSave(); + TEST_CHECK(parent_word == kBeforePokeDataAnonValue); + TEST_PCHECK(ptrace(PTRACE_POKEDATA, parent_pid, &anon_word, + kAfterPokeDataAnonValue) == 0); + MaybeSave(); + + // Replace the value pointed to by file_word_ptr in the mapped file with + // kAfterPokeDataFileValue, via the parent process' mapping. + parent_word = ptrace(PTRACE_PEEKDATA, parent_pid, file_word_ptr, 0); MaybeSave(); - TEST_CHECK(parent_word == kBeforePokeDataValue); - TEST_PCHECK( - ptrace(PTRACE_POKEDATA, parent_pid, &word, kAfterPokeDataValue) == 0); + TEST_CHECK(parent_word == kBeforePokeDataFileValue); + TEST_PCHECK(ptrace(PTRACE_POKEDATA, parent_pid, file_word_ptr, + kAfterPokeDataFileValue) == 0); MaybeSave(); // Detach from the parent and suppress the SIGSTOP. If the SIGSTOP is not @@ -160,7 +184,8 @@ TEST(PtraceTest, AttachParent_PeekData_PokeData_SignalSuppression) { << " status " << status; // Check that the child's PTRACE_POKEDATA was effective. - EXPECT_EQ(kAfterPokeDataValue, word); + EXPECT_EQ(kAfterPokeDataAnonValue, anon_word); + EXPECT_EQ(kAfterPokeDataFileValue, *file_word_ptr); } TEST(PtraceTest, GetSigMask) { |