hi,
I notice that the zygote process name change to "main" Lollipop , but in
KitKat and before, the zygote process name is "zygote".
in Lollipop:
$ adb shell ps | grep -i zygote
root 376 1 1492064 67316 ffffffff 00000000 S zygote
$ adb shell cat /proc/376/stat
376 (main) R 1 376 0 0 -1 4194560 170602 262860 825 248 283 137 226 174 20
0 1 0 637 1522405376 16861 4294967295 1 1 0 0 0 0 4612 0 103672 4294967295
0 0 17 3 0 0 0 0 0 0 0 0
$ adb shell cat /proc/376/comm
main
in KitKat:
$ adb shell ps | grep -i zygote
root 329 1 867640 64860 ffffffff 00000000 S zygote
$ adb shell cat /proc/329/stat
329 (zygote) S 1 329 0 0 -1 1077936384 106227 3303200 682 1688 618 798
27926 9112 20 0 4 0 1254 888463360 16215 4294967295 1 1 0 0 0 0 4612 0
103672 4294967295 0 0 17 0 0 0 0 0 0 0 0 0
$ adb shell cat /proc/329/comm
zygote
In app_main.cpp when start zygote, it will set nicename, and set the
process name with niceName.
frameworks/base/cmds/app_process/app_main.cpp
int main(int argc, char* const argv[])
...
if (strcmp(arg, "--zygote") == 0) {
zygote = true;
niceName = ZYGOTE_NICE_NAME;
...
if (!niceName.isEmpty()) {
runtime.setArgv0(niceName.string());
set_process_name(niceName.string());
}
but in new AndroidRuntime ART, the will change the name "zygote" to "main"
if (zygote) {
runtime.start("com.android.internal.os.ZygoteInit", args);
#0 0xb6f0116c in prctl /system/lib/libc.so
bionic/libc/arch-arm/syscalls/prctl.S:16
#1 0xb6edda48 in pthread_setname_np+0x0040(+64) /system/lib/libc.so
bionic/libc/bionic/pthread_setname_np.cpp:56
t (long int) = -1225441592(0xb6f53ec8)
thread_name (char *) = 0xbedc94a4 "main" [@ENTRY=0xbedc94a4 "main"]
#2 0xb4f479ae in art::SetThreadName+0x006e(+110) /system/lib/libart.so
art/runtime/utils.cc:1010
thread_name (char *) = 0xb4fd9904 "main" [@ENTRY=0xb4fd9904 "main"]
buf (char [16]) = "main"
#3 0xb4f31f7a in art::Thread::Attach+0x00b2(+178) /system/lib/libart.so
art/runtime/thread.cc:409
thread_name (char *) = 0xb4fd9904 "main"
#4 0xb4f20204 in art::Runtime::Init+0x0338(+824) /system/lib/libart.so
art/runtime/runtime.cc:788
#5 0xb4f21dde in art::Runtime::Create+0x0032(+50) /system/lib/libart.so
art/runtime/runtime.cc:335
#6 0xb4ed99d2 in JNI_CreateJavaVM+0x01b2(+434) /system/lib/libart.so
art/runtime/jni_internal.cc:3026
#7 0xb6e19266 in android::AndroidRuntime::startVm+0x0882(+2178)
/system/lib/libandroid_runtime.so
frameworks/base/core/jni/AndroidRuntime.cpp:887
#8 0xb6e19892 in android::AndroidRuntime::start+0x00fe(+254)
/system/lib/libandroid_runtime.so
frameworks/base/core/jni/AndroidRuntime.cpp:967
this (AndroidRuntime *) = 0xbedca858
className (char *) = 0xb6f56f50 "com.android.internal.os.ZygoteInit"
#9 0xb6f56658 in main+0x02ec(+748) /system/bin/app_process32
frameworks/base/cmds/app_process/app_main.cpp:309
niceName (String8) = {
mString (char *) = 0xb5018418 "zygote"}
So the zygote process name is set "zygote" first, then change to "main" in
Lollipop, Is it a bug?
Thanks.
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