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sdm: Synchronized write of xlogs 

Make sure xlogs are flushed to the data partition before the dump
function returns.

Bug: 63539182
Change-Id: Ifd18146e3d93efdb140633e36bcc8321bdf4a238
This commit is contained in:
Naseer Ahmed 2017-07-14 19:56:06 -04:00 committed by Adrian Salido
parent f1fe88efc1
commit e0f39648ed
1 changed files with 17 additions and 1 deletions
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18
msm8998/sdm/libs/core/fb/hw_device.cpp
View File

@ -46,6 +46,7 @@
#include <vector>
#include <algorithm>
#include <string>
#include <sstream>
#include "hw_device.h"
#include "hw_primary.h"
@ -1359,7 +1360,14 @@ DisplayError HWDevice::DumpDebugData() {
DLOGW("Pingpong timeout occurred in the driver.");
#ifdef USER_DEBUG
// Save the xlogs on ping pong time out
std::ofstream dst("/data/vendor/display/mdp_xlog");
const char* xlog_path = "/data/vendor/display/mdp_xlog";
DLOGD("Dumping debugfs data to %s", xlog_path);
std::ostringstream dst;
auto file = open(xlog_path, O_CREAT | O_DSYNC | O_RDWR, "w+");
if (file < 0) {
DLOGE("Couldn't open file: err:%d (%s)",errno, strerror(errno));
return kErrorResources;
}
dst << "+++ MDP:XLOG +++" << std::endl;
std::ifstream src("/sys/kernel/debug/mdp/xlog/dump");
dst << src.rdbuf() << std::endl;
@ -1379,6 +1387,14 @@ DisplayError HWDevice::DumpDebugData() {
src.open("/sys/kernel/debug/mdp/xlog/vbif_dbgbus_xlog");
dst << src.rdbuf() << std::endl;
src.close();
auto ret = write(file, dst.str().c_str(), dst.str().size());
if (ret < 0) {
DLOGE("Failed to write xlog data err: %d (%s)", errno, strerror(errno));
} else {
fsync(file);
}
close(file);
DLOGD("Finished dumping xlogs");;
#endif
return kErrorNone;
}