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Pretty-print ptrace event name on WIFSTOPPED.

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PiperOrigin-RevId: 368688417
Change-Id: I4368268f1b05148213010768a6d4eaa87211ea45
This commit is contained in:
Catalin Patulea 2021-04-15 12:01:42 -07:00 committed by Copybara-Service
parent c15b5cb123
commit d5bd1cb38f
3 changed files with 33 additions and 1 deletions
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3
sandboxed_api/sandbox2/monitor.cc
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@ -440,7 +440,8 @@ void Monitor::MainLoop(sigset_t* sset) {
} else if (WIFSTOPPED(status)) {
VLOG(2) << "PID: " << ret
<< " received signal: " << util::GetSignalName(WSTOPSIG(status))
<< " with event: " << __WPTRACEEVENT(status);
<< " with event: "
<< util::GetPtraceEventName(__WPTRACEEVENT(status));
StateProcessStopped(ret, status);
} else if (WIFCONTINUED(status)) {
VLOG(2) << "PID: " << ret << " is being continued";

28
sandboxed_api/sandbox2/util.cc
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@ -18,6 +18,7 @@
#include <bits/local_lim.h>
#include <sched.h>
#include <spawn.h>
#include <sys/ptrace.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/uio.h>
@ -283,6 +284,33 @@ std::string GetRlimitName(int resource) {
}
}
std::string GetPtraceEventName(int event) {
#if !defined(PTRACE_EVENT_STOP)
#define PTRACE_EVENT_STOP 128
#endif
switch (event) {
case PTRACE_EVENT_FORK:
return "PTRACE_EVENT_FORK";
case PTRACE_EVENT_VFORK:
return "PTRACE_EVENT_VFORK";
case PTRACE_EVENT_CLONE:
return "PTRACE_EVENT_CLONE";
case PTRACE_EVENT_EXEC:
return "PTRACE_EVENT_EXEC";
case PTRACE_EVENT_VFORK_DONE:
return "PTRACE_EVENT_VFORK_DONE";
case PTRACE_EVENT_EXIT:
return "PTRACE_EVENT_EXIT";
case PTRACE_EVENT_SECCOMP:
return "PTRACE_EVENT_SECCOMP";
case PTRACE_EVENT_STOP:
return "PTRACE_EVENT_STOP";
default:
return absl::StrCat("UNKNOWN: ", event);
}
}
absl::StatusOr<std::string> ReadCPathFromPid(pid_t pid, uintptr_t ptr) {
std::string path(PATH_MAX, '\0');
iovec local_iov[] = {{&path[0], path.size()}};

3
sandboxed_api/sandbox2/util.h
View File

@ -71,6 +71,9 @@ std::string GetSignalName(int signo);
// Returns rlimit resource name
std::string GetRlimitName(int resource);
// Returns ptrace event name
std::string GetPtraceEventName(int event);
// Reads a path string (NUL-terminated, shorter than PATH_MAX) from another
// process memory
absl::StatusOr<std::string> ReadCPathFromPid(pid_t pid, uintptr_t ptr);