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Don't re-read process information that should be static

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This changes the process info code to only update the information that
can change about a process when updating information about a process.

CCBUG: 325442
REVIEW: 128777
This commit is contained in:
Martin T. H. Sandsmark
2016-08-13 23:38:24 +02:00
parent d73270a470
commit 392ee33cf8
2 changed files with 135 additions and 119 deletions
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239
src/ProcessInfo.cpp
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@@ -97,7 +97,7 @@ void ProcessInfo::setError(Error error)
void ProcessInfo::update()
{
readProcessInfo(_pid);
readCurrentDir(_pid);
}
QString ProcessInfo::validCurrentDir() const
@@ -360,6 +360,11 @@ bool NullProcessInfo::readProcessInfo(int /*pid*/)
return false;
}
bool NullProcessInfo::readCurrentDir(int /*pid*/)
{
return false;
}
void NullProcessInfo::readUserName()
{
}
@@ -423,6 +428,24 @@ public:
UnixProcessInfo(aPid, titleFormat) {
}
protected:
virtual bool readCurrentDir(int aPid) {
char path_buffer[MAXPATHLEN + 1];
path_buffer[MAXPATHLEN] = 0;
QByteArray procCwd = QFile::encodeName(QStringLiteral("/proc/%1/cwd").arg(aPid));
const int length = readlink(procCwd.constData(), path_buffer, MAXPATHLEN);
if (length == -1) {
setError(UnknownError);
return false;
}
path_buffer[length] = '\0';
QString path = QFile::decodeName(path_buffer);
setCurrentDir(path);
return true;
}
private:
virtual bool readProcInfo(int aPid) {
// indicies of various fields within the process status file which
@@ -559,23 +582,6 @@ private:
return true;
}
virtual bool readCurrentDir(int aPid) {
char path_buffer[MAXPATHLEN + 1];
path_buffer[MAXPATHLEN] = 0;
QByteArray procCwd = QFile::encodeName(QStringLiteral("/proc/%1/cwd").arg(aPid));
const int length = readlink(procCwd.constData(), path_buffer, MAXPATHLEN);
if (length == -1) {
setError(UnknownError);
return false;
}
path_buffer[length] = '\0';
QString path = QFile::decodeName(path_buffer);
setCurrentDir(path);
return true;
}
};
#elif defined(Q_OS_FREEBSD)
@@ -586,6 +592,48 @@ public:
UnixProcessInfo(aPid, titleFormat) {
}
protected:
virtual bool readCurrentDir(int aPid) {
#if defined(HAVE_OS_DRAGONFLYBSD)
char buf[PATH_MAX];
int managementInfoBase[4];
size_t len;
managementInfoBase[0] = CTL_KERN;
managementInfoBase[1] = KERN_PROC;
managementInfoBase[2] = KERN_PROC_CWD;
managementInfoBase[3] = aPid;
len = sizeof(buf);
if (sysctl(managementInfoBase, 4, buf, &len, NULL, 0) == -1)
return false;
setCurrentDir(buf);
return true;
#else
int numrecords;
struct kinfo_file* info = 0;
info = kinfo_getfile(aPid, &numrecords);
if (!info)
return false;
for (int i = 0; i < numrecords; ++i) {
if (info[i].kf_fd == KF_FD_TYPE_CWD) {
setCurrentDir(info[i].kf_path);
free(info);
return true;
}
}
free(info);
return false;
#endif
}
private:
virtual bool readProcInfo(int aPid) {
int managementInfoBase[4];
@@ -653,47 +701,6 @@ private:
return true;
}
virtual bool readCurrentDir(int aPid) {
#if defined(HAVE_OS_DRAGONFLYBSD)
char buf[PATH_MAX];
int managementInfoBase[4];
size_t len;
managementInfoBase[0] = CTL_KERN;
managementInfoBase[1] = KERN_PROC;
managementInfoBase[2] = KERN_PROC_CWD;
managementInfoBase[3] = aPid;
len = sizeof(buf);
if (sysctl(managementInfoBase, 4, buf, &len, NULL, 0) == -1)
return false;
setCurrentDir(buf);
return true;
#else
int numrecords;
struct kinfo_file* info = 0;
info = kinfo_getfile(aPid, &numrecords);
if (!info)
return false;
for (int i = 0; i < numrecords; ++i) {
if (info[i].kf_fd == KF_FD_TYPE_CWD) {
setCurrentDir(info[i].kf_path);
free(info);
return true;
}
}
free(info);
return false;
#endif
}
};
#elif defined(Q_OS_OPENBSD)
@@ -704,6 +711,26 @@ public:
UnixProcessInfo(aPid, titleFormat) {
}
protected:
virtual bool readCurrentDir(int aPid) {
char buf[PATH_MAX];
int managementInfoBase[3];
size_t len;
managementInfoBase[0] = CTL_KERN;
managementInfoBase[1] = KERN_PROC_CWD;
managementInfoBase[2] = aPid;
len = sizeof(buf);
if (::sysctl(managementInfoBase, 3, buf, &len, NULL, 0) == -1) {
qWarning() << "sysctl() call failed with code" << errno;
return false;
}
setCurrentDir(buf);
return true;
}
private:
virtual bool readProcInfo(int aPid) {
int managementInfoBase[6];
@@ -787,25 +814,6 @@ private:
free(argv);
return true;
}
virtual bool readCurrentDir(int aPid) {
char buf[PATH_MAX];
int managementInfoBase[3];
size_t len;
managementInfoBase[0] = CTL_KERN;
managementInfoBase[1] = KERN_PROC_CWD;
managementInfoBase[2] = aPid;
len = sizeof(buf);
if (::sysctl(managementInfoBase, 3, buf, &len, NULL, 0) == -1) {
qWarning() << "sysctl() call failed with code" << errno;
return false;
}
setCurrentDir(buf);
return true;
}
};
#elif defined(Q_OS_OSX)
@@ -816,6 +824,17 @@ public:
UnixProcessInfo(aPid, titleFormat) {
}
protected:
virtual bool readCurrentDir(int aPid) {
struct proc_vnodepathinfo vpi;
const int nb = proc_pidinfo(aPid, PROC_PIDVNODEPATHINFO, 0, &vpi, sizeof(vpi));
if (nb == sizeof(vpi)) {
setCurrentDir(QString(vpi.pvi_cdir.vip_path));
return true;
}
return false;
}
private:
virtual bool readProcInfo(int aPid) {
int managementInfoBase[4];
@@ -875,15 +894,6 @@ private:
Q_UNUSED(aPid);
return false;
}
virtual bool readCurrentDir(int aPid) {
struct proc_vnodepathinfo vpi;
const int nb = proc_pidinfo(aPid, PROC_PIDVNODEPATHINFO, 0, &vpi, sizeof(vpi));
if (nb == sizeof(vpi)) {
setCurrentDir(QString(vpi.pvi_cdir.vip_path));
return true;
}
return false;
}
};
#elif defined(Q_OS_SOLARIS)
@@ -904,6 +914,27 @@ public:
SolarisProcessInfo(int aPid, const QString& titleFormat)
: UnixProcessInfo(aPid, titleFormat) {
}
protected:
// FIXME: This will have the same issues as BKO 251351; the Linux
// version uses readlink.
virtual bool readCurrentDir(int aPid) {
QFileInfo info(QString("/proc/%1/path/cwd").arg(aPid));
const bool readable = info.isReadable();
if (readable && info.isSymLink()) {
setCurrentDir(info.symLinkTarget());
return true;
} else {
if (!readable)
setError(PermissionsError);
else
setError(UnknownError);
return false;
}
}
private:
virtual bool readProcInfo(int aPid) {
QFile psinfo(QString("/proc/%1/psinfo").arg(aPid));
@@ -929,25 +960,6 @@ private:
// Handled in readProcInfo()
return false;
}
// FIXME: This will have the same issues as BKO 251351; the Linux
// version uses readlink.
virtual bool readCurrentDir(int aPid) {
QFileInfo info(QString("/proc/%1/path/cwd").arg(aPid));
const bool readable = info.isReadable();
if (readable && info.isSymLink()) {
setCurrentDir(info.symLinkTarget());
return true;
} else {
if (!readable)
setError(PermissionsError);
else
setError(UnknownError);
return false;
}
}
};
#endif
@@ -1124,18 +1136,21 @@ QString SSHProcessInfo::format(const QString& input) const
ProcessInfo* ProcessInfo::newInstance(int aPid, const QString& titleFormat)
{
ProcessInfo *info;
#if defined(Q_OS_LINUX)
return new LinuxProcessInfo(aPid, titleFormat);
info = new LinuxProcessInfo(aPid, titleFormat);
#elif defined(Q_OS_SOLARIS)
return new SolarisProcessInfo(aPid, titleFormat);
info = new SolarisProcessInfo(aPid, titleFormat);
#elif defined(Q_OS_OSX)
return new MacProcessInfo(aPid, titleFormat);
info = new MacProcessInfo(aPid, titleFormat);
#elif defined(Q_OS_FREEBSD)
return new FreeBSDProcessInfo(aPid, titleFormat);
info = new FreeBSDProcessInfo(aPid, titleFormat);
#elif defined(Q_OS_OPENBSD)
return new OpenBSDProcessInfo(aPid, titleFormat);
info = new OpenBSDProcessInfo(aPid, titleFormat);
#else
return new NullProcessInfo(aPid, titleFormat);
info = new NullProcessInfo(aPid, titleFormat);
#endif
info->readProcessInfo(aPid);
return info;
}