labath created this revision.
labath added a subscriber: lldb-commits.
https://reviews.llvm.org/D27459
Files:
include/lldb/Core/Log.h
source/Plugins/Process/Linux/NativeProcessLinux.cpp
Index: source/Plugins/Process/Linux/NativeProcessLinux.cpp
===================================================================
--- source/Plugins/Process/Linux/NativeProcessLinux.cpp
+++ source/Plugins/Process/Linux/NativeProcessLinux.cpp
@@ -41,6 +41,7 @@
#include "lldb/Utility/LLDBAssert.h"
#include "lldb/Utility/PseudoTerminal.h"
#include "lldb/Utility/StringExtractor.h"
+#include "llvm/Support/FormatVariadic.h"
#include "NativeThreadLinux.h"
#include "Plugins/Process/POSIX/ProcessPOSIXLog.h"
@@ -72,6 +73,16 @@
using namespace lldb_private::process_linux;
using namespace llvm;
+// Obviously, these would not live in this file.
+namespace lldb_private {
+llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const FileSpec &spec) {
+ return OS << spec.GetCString();
+}
+llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, Error &error) {
+ return OS << error.AsCString();
+}
+}
+
// Private bits we only need internally.
static bool ProcessVmReadvSupported() {
@@ -93,16 +104,12 @@
// value from our own process.
ssize_t res = process_vm_readv(getpid(), &local, 1, &remote, 1, 0);
is_supported = (res == sizeof(source) && source == dest);
- if (log) {
- if (is_supported)
- log->Printf("%s: Detected kernel support for process_vm_readv syscall. "
- "Fast memory reads enabled.",
- __FUNCTION__);
- else
- log->Printf("%s: syscall process_vm_readv failed (error: %s). Fast "
- "memory reads disabled.",
- __FUNCTION__, strerror(errno));
- }
+ if (is_supported)
+ LLDB_LOG() << "Detected kernel support for process_vm_readv syscall. "
+ "Fast memory reads enabled.";
+ else
+ LLDB_LOG() << "syscall process_vm_readv failed (error: "
+ << strerror(errno) << "). Fast memory reads disabled.";
});
return is_supported;
@@ -115,16 +122,15 @@
return;
if (const FileAction *action = info.GetFileActionForFD(STDIN_FILENO))
- log->Printf("%s: setting STDIN to '%s'", __FUNCTION__,
- action->GetFileSpec().GetCString());
+ LLDB_LOG() << "setting STDIN to " << action->GetFileSpec();
else
- log->Printf("%s leaving STDIN as is", __FUNCTION__);
+ LLDB_LOG() << "leaving STDIN as is";
if (const FileAction *action = info.GetFileActionForFD(STDOUT_FILENO))
- log->Printf("%s setting STDOUT to '%s'", __FUNCTION__,
- action->GetFileSpec().GetCString());
+ LLDB_LOG() << llvm::formatv("setting STDOUT to '{}'",
+ action->GetFileSpec().GetCString());
else
- log->Printf("%s leaving STDOUT as is", __FUNCTION__);
+ LLDB_LOG() << "leaving STDOUT as is";
if (const FileAction *action = info.GetFileActionForFD(STDERR_FILENO))
log->Printf("%s setting STDERR to '%s'", __FUNCTION__,
@@ -135,8 +141,7 @@
int i = 0;
for (const char **args = info.GetArguments().GetConstArgumentVector(); *args;
++args, ++i)
- log->Printf("%s arg %d: \"%s\"", __FUNCTION__, i,
- *args ? *args : "nullptr");
+ LLDB_LOG() << llvm::formatv("arg {}: \"{}\"", *args);
}
void DisplayBytes(StreamString &s, void *bytes, uint32_t count) {
@@ -256,9 +261,7 @@
if (error.Fail()) {
native_process_sp.reset();
- if (log)
- log->Printf("NativeProcessLinux::%s failed to launch process: %s",
- __FUNCTION__, error.AsCString());
+ LLDB_LOG() << "failed to launch process: " << error;
return error;
}
@@ -308,9 +311,7 @@
void NativeProcessLinux::AttachToInferior(MainLoop &mainloop, lldb::pid_t pid,
Error &error) {
Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
- if (log)
- log->Printf("NativeProcessLinux::%s (pid = %" PRIi64 ")", __FUNCTION__,
- pid);
+ LLDB_LOG() << "(pid = " << pid << ")";
m_sigchld_handle = mainloop.RegisterSignal(
SIGCHLD, [this](MainLoopBase &) { SigchldHandler(); }, error);
@@ -322,10 +323,8 @@
return;
// Set the architecture to the exe architecture.
- if (log)
- log->Printf("NativeProcessLinux::%s (pid = %" PRIi64
- ") detected architecture %s",
- __FUNCTION__, pid, m_arch.GetArchitectureName());
+ LLDB_LOG() << "(pid = " << pid << ") detected architecture "
+ << m_arch.GetArchitectureName();
m_pid = pid;
SetState(eStateAttaching);
@@ -357,9 +356,7 @@
int status;
if ((wpid = waitpid(pid, &status, 0)) < 0) {
error.SetErrorToErrno();
- if (log)
- log->Printf("NativeProcessLinux::%s waitpid for inferior failed with %s",
- __FUNCTION__, error.AsCString());
+ LLDB_LOG() << "waitpid for inferior failed with: " << error;
// Mark the inferior as invalid.
// FIXME this could really use a new state - eStateLaunchFailure. For now,
@@ -371,16 +368,11 @@
assert(WIFSTOPPED(status) && (wpid == static_cast<::pid_t>(pid)) &&
"Could not sync with inferior process.");
- if (log)
- log->Printf("NativeProcessLinux::%s inferior started, now in stopped state",
- __FUNCTION__);
+ LLDB_LOG() << "inferior started, now in stopped state";
error = SetDefaultPtraceOpts(pid);
if (error.Fail()) {
- if (log)
- log->Printf("NativeProcessLinux::%s inferior failed to set default "
- "ptrace options: %s",
- __FUNCTION__, error.AsCString());
+ LLDB_LOG() << "inferior failed to set default ptrace options: " << error;
// Mark the inferior as invalid.
// FIXME this could really use a new state - eStateLaunchFailure. For now,
@@ -579,11 +571,9 @@
// Handle when the thread exits.
if (exited) {
- if (log)
- log->Printf(
- "NativeProcessLinux::%s() got exit signal(%d) , tid = %" PRIu64
- " (%s main thread)",
- __FUNCTION__, signal, pid, is_main_thread ? "is" : "is not");
+ LLDB_LOG() << llvm::formatv(
+ "got exit signal({}) , tid = {} ({} main thread)", signal, pid,
+ is_main_thread ? "is" : "is not");
// This is a thread that exited. Ensure we're not tracking it anymore.
const bool thread_found = StopTrackingThread(pid);
@@ -597,15 +587,13 @@
const bool already_notified = (GetState() == StateType::eStateExited) ||
(GetState() == StateType::eStateCrashed);
if (!already_notified) {
- if (log)
- log->Printf("NativeProcessLinux::%s() tid = %" PRIu64
- " handling main thread exit (%s), expected exit state "
- "already set but state was %s instead, setting exit "
- "state now",
- __FUNCTION__, pid,
- thread_found ? "stopped tracking thread metadata"
- : "thread metadata not found",
- StateAsCString(GetState()));
+ LLDB_LOG() << llvm::formatv(
+ "tid = {} handling main thread exit ({}), expected exit state "
+ "already set but state was {} instead, setting exit state now",
+ pid,
+ thread_found ? "stopped tracking thread metadata"
+ : "thread metadata not found",
+ StateAsCString(GetState()));
// The main thread exited. We're done monitoring. Report to delegate.
SetExitStatus(convert_pid_status_to_exit_type(status),
convert_pid_status_to_return_code(status), nullptr, true);
@@ -646,24 +634,20 @@
// received a new thread notification. This is indicated by GetSignalInfo()
// returning
// si_code == SI_USER and si_pid == 0
- if (log)
- log->Printf("NativeProcessLinux::%s received notification about an "
- "unknown tid %" PRIu64 ".",
- __FUNCTION__, pid);
+ LLDB_LOG() << "received notification about an unknown tid " << pid;
if (info_err.Fail()) {
- if (log)
- log->Printf("NativeProcessLinux::%s (tid %" PRIu64
- ") GetSignalInfo failed (%s). Ingoring this notification.",
- __FUNCTION__, pid, info_err.AsCString());
+ LLDB_LOG() << llvm::formatv(
+ "(tid {}) GetSignalInfo failed ({}). Ingoring this notification.",
+ pid, info_err.AsCString());
return;
}
- if (log && (info.si_code != SI_USER || info.si_pid != 0))
- log->Printf("NativeProcessLinux::%s (tid %" PRIu64
- ") unexpected signal info (si_code: %d, si_pid: %d). "
- "Treating as a new thread notification anyway.",
- __FUNCTION__, pid, info.si_code, info.si_pid);
+ if (info.si_code != SI_USER || info.si_pid != 0)
+ LLDB_LOG() << llvm::formatv(
+ "(tid {}) unexpected signal info (si_code: {}, si_pid: {}). "
+ "Treating as a new thread notification anyway.",
+ pid, info.si_code, info.si_pid);
auto thread_sp = AddThread(pid);
// Resume the newly created thread.
@@ -764,44 +748,34 @@
int status = -1;
::pid_t wait_pid;
do {
- if (log)
- log->Printf("NativeProcessLinux::%s() received thread creation event for "
- "tid %" PRIu32
- ". tid not tracked yet, waiting for thread to appear...",
- __FUNCTION__, tid);
+ LLDB_LOG() << "received thread creation event for tid " << tid
+ << ". tid not tracked yet, waiting for thread to appear...";
wait_pid = waitpid(tid, &status, __WALL);
} while (wait_pid == -1 && errno == EINTR);
// Since we are waiting on a specific tid, this must be the creation event.
// But let's do
// some checks just in case.
if (wait_pid != tid) {
- if (log)
- log->Printf(
- "NativeProcessLinux::%s() waiting for tid %" PRIu32
- " failed. Assuming the thread has disappeared in the meantime",
- __FUNCTION__, tid);
+ LLDB_LOG()
+ << "waiting for tid " << tid
+ << " failed. Assuming the thread has disappeared in the meantime";
// The only way I know of this could happen is if the whole process was
// SIGKILLed in the mean time. In any case, we can't do anything about that
// now.
return;
}
if (WIFEXITED(status)) {
- if (log)
- log->Printf("NativeProcessLinux::%s() waiting for tid %" PRIu32
- " returned an 'exited' event. Not tracking the thread.",
- __FUNCTION__, tid);
+ LLDB_LOG() << "waiting for tid " << tid <<
+ " returned an 'exited' event. Not tracking the thread.";
// Also a very improbable event.
return;
}
siginfo_t info;
Error error = GetSignalInfo(tid, &info);
if (error.Fail()) {
- if (log)
- log->Printf(
- "NativeProcessLinux::%s() GetSignalInfo for tid %" PRIu32
- " failed. Assuming the thread has disappeared in the meantime.",
- __FUNCTION__, tid);
+ LLDB_LOG() << "GetSignalInfo for tid " << tid <<
+ " failed. Assuming the thread has disappeared in the meantime.";
return;
}
@@ -813,15 +787,12 @@
// thread is alive and we are receiving events from it, we shall pretend
// that it was
// created properly.
- log->Printf("NativeProcessLinux::%s() GetSignalInfo for tid %" PRIu32
- " received unexpected signal with code %d from pid %d.",
- __FUNCTION__, tid, info.si_code, info.si_pid);
+ LLDB_LOG() << "GetSignalInfo for tid " << tid
+ << " received unexpected signal with code " << info.si_code
+ << " from pid " << info.si_pid << ".";
}
- if (log)
- log->Printf("NativeProcessLinux::%s() pid = %" PRIu64
- ": tracking new thread tid %" PRIu32,
- __FUNCTION__, GetID(), tid);
+ LLDB_LOG() << "pid = " << GetID() << ": tracking new thread tid " << tid;
new_thread_sp = AddThread(tid);
ResumeThread(*new_thread_sp, eStateRunning, LLDB_INVALID_SIGNAL_NUMBER);
Index: include/lldb/Core/Log.h
===================================================================
--- include/lldb/Core/Log.h
+++ include/lldb/Core/Log.h
@@ -18,6 +18,9 @@
// C++ Includes
// Other libraries and framework includes
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Path.h"
+
// Project includes
#include "lldb/Core/ConstString.h"
#include "lldb/Core/Flags.h"
@@ -192,6 +195,39 @@
DISALLOW_COPY_AND_ASSIGN(LogChannel);
};
+class LogWrapper {
+public:
+ LogWrapper(Log &log) : m_log(log), m_stream(m_message) {}
+ ~LogWrapper() { m_log.Printf("%s", m_stream.str().c_str()); }
+
+ llvm::raw_ostream &stream() { return m_stream; }
+
+private:
+ Log &m_log;
+ std::string m_message;
+ llvm::raw_string_ostream m_stream;
+};
+
+#define AMBIGUOUS_ELSE_BLOCKER \
+ switch (0) \
+ case 0: \
+ default:
+#define LLDB_LOG_(log) \
+ AMBIGUOUS_ELSE_BLOCKER \
+ if (!(log)) \
+ ; \
+ else \
+ LogWrapper(*(log)).stream() << llvm::sys::path::filename(__FILE__) \
+ << "::" << __FUNCTION__ << ": "
+
+// This may be overkill, but it is somewhat shorter, and all our log variables
+// are called "log" anyway. If we don't want this, we can remove the underscore
+// from the previous macro.
+#define LLDB_LOG() LLDB_LOG_(log)
+
+// If we really want, we can have separate IF_ALL and IF_ANY versions of this
+#define LLDB_LOG_IF(flags) LLDB_LOG_(lldb_private::GetLogIfAnyCategoriesSet(flags))
+
} // namespace lldb_private
#endif // liblldb_Log_h_
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