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Bug 914815 - Support profiler options when starting the profiler with a signal. r=jld

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This commit is contained in:
Benoit Girard 2013-09-11 14:01:16 -04:00
parent 9862117f99
commit bc63664e2d
1 changed files with 33 additions and 4 deletions
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37
tools/profiler/platform-linux.cc
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@ -42,6 +42,8 @@
#include <sys/prctl.h> // set name
#include <stdlib.h>
#include <sched.h>
#include <iostream>
#include <fstream>
#ifdef ANDROID
#include <android/log.h>
#else
@ -429,12 +431,39 @@ void Sampler::UnregisterCurrentThread()
#ifdef ANDROID
static struct sigaction old_sigstart_signal_handler;
const int SIGSTART = SIGUSR1;
const int SIGSTART = SIGUSR2;
static void StartSignalHandler(int signal, siginfo_t* info, void* context) {
profiler_start(PROFILE_DEFAULT_ENTRY, PROFILE_DEFAULT_INTERVAL,
PROFILE_DEFAULT_FEATURES, PROFILE_DEFAULT_FEATURE_COUNT,
NULL, 0);
// XXX: Everything we do here is NOT async signal safe. We risk nasty things
// like deadlocks but we typically only do this once so it tends to be ok.
// See bug 909403
const char* threadName = NULL;
uint32_t threadCount = 0;
char thread[256];
// TODO support selecting features from profiler.options
const char* features[2] = {NULL, NULL};
uint32_t featureCount = 0;
features[0] = "leaf";
featureCount++;
const char* threadFeature = "threads";
std::ifstream infile;
infile.open("/data/local/tmp/profiler.options");
if (infile.is_open()) {
infile.getline(thread, 256);
threadName = thread;
threadCount = 1;
features[featureCount] = threadFeature;
featureCount++;
printf_stderr("Profiling only %s\n", threadName);
}
infile.close();
profiler_start(PROFILE_DEFAULT_ENTRY, 1,
features, featureCount,
&threadName, threadCount);
}
void OS::RegisterStartHandler()