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elf_core_dump_unittest: skip test if setrlimit will fail

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Some systems have constrained rlimits for core files (the CrOS chroot is
an example of this). Fail gracefully in this case, rather than breaking
the user's tests.

Bug: b:235999011
Change-Id: I5649b42d3e6fd9b4f9b11e1fd9d0d4a1083d300f
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/3722724
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
This commit is contained in:
George Burgess IV 2022-06-24 12:03:52 -07:00 committed by Mark Mentovai
parent ad8a43f367
commit a8e8a69591
3 changed files with 20 additions and 3 deletions
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10
src/common/linux/elf_core_dump_unittest.cc
View file

@ -130,9 +130,13 @@ TEST(ElfCoreDumpTest, TestElfHeader) {
TEST(ElfCoreDumpTest, ValidCoreFile) {
CrashGenerator crash_generator;
if (!crash_generator.HasDefaultCorePattern()) {
fprintf(stderr, "ElfCoreDumpTest.ValidCoreFile test is skipped "
"due to non-default core pattern");
return;
GTEST_SKIP() << "ElfCoreDumpTest.ValidCoreFile test is skipped "
"due to non-default core pattern";
}
if (!crash_generator.HasResourceLimitsAmenableToCrashCollection()) {
GTEST_SKIP() << "ElfCoreDumpTest.ValidCoreFile test is skipped "
"due to inadequate system resource limits";
}
const unsigned kNumOfThreads = 3;

9
src/common/linux/tests/crash_generator.cc
View file

@ -169,6 +169,15 @@ bool CrashGenerator::SetCoreFileSizeLimit(rlim_t limit) const {
return true;
}
bool CrashGenerator::HasResourceLimitsAmenableToCrashCollection() const {
struct rlimit limits;
if (getrlimit(RLIMIT_CORE, &limits) == -1) {
perror("CrashGenerator: Failed to get core file size limit");
return false;
}
return limits.rlim_max >= kCoreSizeLimit;
}
bool CrashGenerator::CreateChildCrash(
unsigned num_threads, unsigned crash_thread, int crash_signal,
pid_t* child_pid) {

4
src/common/linux/tests/crash_generator.h
View file

@ -65,6 +65,10 @@ class CrashGenerator {
// Returns the directory of a copy of proc files of the child process.
string GetDirectoryOfProcFilesCopy() const;
// Returns whether current resource limits would prevent `CreateChildCrash`
// from operating.
bool HasResourceLimitsAmenableToCrashCollection() const;
// Creates a crash (and a core dump file) by creating a child process with
// |num_threads| threads, and the terminating the child process by sending
// a signal with number |crash_signal| to the |crash_thread|-th thread.