Can't get DYLD_PRINT_STATISTICS environment variable working

The problem

We are trying to use DYLD_PRINT_STATISTICS environment variable in our scenarios be we can’t get it working. We are successfully sending launch arguments but environment is causing us issues.

Environment

Appium version (or git revision) that exhibits the issue: 1.6.4
Last Appium version that did not exhibit the issue (if applicable):
Desktop OS/version used to run Appium: macOS
Node.js version (unless using Appium.app|exe): v7.9.0
Mobile platform/version under test: iOS
Real device or emulator/simulator: simulator
Appium CLI or Appium.app|exe: Appium CLI

Details

We spent quite a lot of time trying different combinations like putting env inside of processArguments, outside of it, prefixing SIMCTL_CHILD_, … It seems like right way to pass it should be:

"processArguments": {"args": [], "env": {"DYLD_PRINT_STATISTICS": 1}}

If this flag is successfully applied, logs should contain something like this:

Total pre-main time: 1.1 seconds (100.0%)
         dylib loading time: 372.25 milliseconds (31.4%)
        rebase/binding time: 646.09 milliseconds (54.6%)
            ObjC setup time:  79.70 milliseconds (6.7%)
           initializer time:  85.07 milliseconds (7.1%)
           slowest intializers :
               libSystem.dylib :   3.25 milliseconds (0.2%)

Are we missing something here or it is Appium issue?

Issue Analytics

State:
Created 6 years ago
Comments:12 (5 by maintainers)

Top GitHub Comments

4reactions

jcavarcommented, Jul 13, 2017

@sukeshmlr this is what we do:

void __attribute__ ((constructor)) premain() {
    // Redirect logs only if console is not attached
    if (!isatty(STDERR_FILENO)) {
        const char *redirect_log_path_char = [redirectLogPath cStringUsingEncoding:NSUTF8StringEncoding];
        NSLog(@"----Redirect stderr Path-----");
        NSLog(@"%s", redirect_log_path_char);
        NSLog(@"----Redirect stderr Path-----");
        freopen(redirect_log_path_char, "a+", stderr);
    }
}

You can put this somewhere in main.m

0reactions

lock[bot]commented, Jul 4, 2019

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

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