This document explains how to debug Mozilla-derived applications such as Firefox, Thunderbird, and SeaMonkey on macOS using Xcode. If you want to debug from the terminal see Debugging Mozilla with lldb. For specific information on a way to debug hangs, see Debugging a hang on OS X.
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Creating a debuggable build
First, you need to build the application you're going to debug using
--disable-optimize --enable-debug-symbols in your .mozconfig (also add --enable-debug if you want assertions etc. compiled in). See Building Firefox for macOS if you need help creating your own build.
Debugging Firefox on macOS 10.14+
macOS 10.14 introduced Notarization and Hardened Runtime features for improved application security. macOS 10.15 went further, requiring applications to be Notarized with Hardened Runtime enabled in order to launch (ignoring workarounds.) When run on earlier macOS versions, Notarization and Hardened Runtime settings have no effect.
Official Builds
At this time, official builds of Firefox 69 and later are Notarized. Uplifts to Firefox 68 and ESR 68 to enable Notarization are planned. As a result, it is not possible to attach a debugger to these official Firefox releases on macOS 10.14+ without disabling System Integrity Protection (SIP). This is due to Notarization requiring Hardened Runtime to be enabled with the
com.apple.security.get-task-allow entitlement disallowed. Rather than disabling SIP (which has security implications), it is recommended to debug with try builds or local builds. The differences are explained below.
try Server Builds
In most cases, developers needing to debug a build as close as possible to the production environment should use a try build. These builds enable Hardened Runtime and only differ from production builds in that they are not Notarized which should not otherwise affect functionality, (other than the ability to easily launch the browser on macOS 10.15+ -- see quarantine note below). At this time, developers can obtain a Hardened Runtime build with the
com.apple.security.get-task-allow entitlement allowed by submitting a try build and downloading the dmg generated by the 'Rpk' shippable build job. A debugger can be attached to Firefox processes of these builds. try builds use the developer.entitlements.xml file from the source tree while production builds use production.entitlements.xml . On macOS 10.15+, downloaded try builds will not launch by default because Notarization is required. To workaround this problem, remove the quarantine extended attribute from the downloaded Nightly:
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$ xattr -r -d com.apple.quarantine /Path/to/Nightly.app
Local Builds
Local builds of mozilla-central do not enable Hardened Runtime and hence do not have debugging restrictions. As a result, some functionality will be permitted on local builds, but blocked on production builds which have Hardened Runtime enabled. Bug 1522409 was filed to automate codesigning local builds to enable Hardened Runtime by default and eliminate this discrepancy.
Scansnap software for mac el capitan. To obtain a Hardened Runtime build without using try infrastructure, a developer can manually codesign builds using the macOS
codesign(1) command with the developer.entitlements.xml file from the tree. This requires creating a codesigning identity.
Disabling System Integrity Protection (SIP)
Visual certexam suite crack for mac os x. If debugging a production build is required, follow Apple's documented steps for disabling System Integrity Protection (SIP). Note that disabling SIP bypasses Hardened Runtime restrictions which can mask some bugs that only occur with Hardened Runtime so it is recommended to test fixes with SIP enabled. Disabling SIP has system security implications that should be understood before taking this step.
Creating an Xcode project
If you try to create a new Xcode project in an existing directory then Xcode will delete its existing contents (Xcode will warn you beforehand). To work around that, the steps below have you initialize the project outside the Mozilla source tree, close the project, copy the .xcodeproj project 'file' into the source tree, and then reopen the project to finish setting it up.
Note also that since Xcode 7.3.1 it doesn't seem to be possible to have the Xcode project live outside the source tree. If you try to do that then Xcode will simply copy the source files under the project directory rather than link to them (still the case in Xcode 10?) which breaks debugging and the possibility to modify-rebuild-relaunch from inside Xcode. Spider man 2 full movie download.
These steps were last updated for Xcode 10.3:
At this point you can run the application from Xcode, and when you pause or hit breakpoints it should show open the correct source file at the correct line.
Setting up lldblldb is the debugger XCode provides/uses.
One important issue that the Mozilla .lldbinit file fixes is that by default some breakpoints will be listed as 'pending', and XCode will not stop at them. If you don't include the Mozilla's .lldbinit, you must at least put
settings set target.inline-breakpoint-strategy always in your $HOME/.lldbinit as recommended on Debugging Mozilla with lldb.
The .lldbinit file in the source tree imports many useful Mozilla specific lldb settings, commands and formatters into
lldb , but you may need to take one of the following steps to make sure this file is used.
If you are using
lldb on the command line (independently of Xcode) and you will always run it from either the top source directory, the object directory or else the dist/bin subdirectory of the object directory, then adding the following setting to your $HOME/.lldbinit is sufficient:
How do i download office for mac 2011. However, if you will run lldb from a different directory, or if you will be running it indirectly by debugging in Xcode (Xcode always runs lldb from '/'), then this setting will not help you. Instead, add the following to your
$HOME/.lldbinit :
see Debugging Mozilla with lldb for more information.
Having a profile for debugging purposes
It is recommended to create a separate profile to debug with, whatever your task, so that you don't lose precious data like Bookmarks, saved passwords, etc. So that you're not bothered with the profile manager every time you start to debug, expand the 'Executables' branch of the 'Groups & Files' list and double click on the Executable you added for Mozilla. Click the plus icon under the 'Arguments' list and type '-P <profile name>' (e.g. '-P MozillaDebug'). Close the window when you're done.
Running a debug session![]()
Make sure breakpoints are active (which implies running under the debugger) by opening the Product menu and selecting 'Debug / Activate Breakpoints' (also shown by the 'Breakpoints' button in the top right section of the main window). Then click the 'Run' button or select 'Run' from the Product menu.
Setting breakpoints
Setting a breakpoint is easy. Just open the source file you want to debug in Xcode, and click in the margin to the left of the line of code where you want to break.
Microsoft outlook update mac 2016. During the debugging session, each time that line is executed, the debugger will break there, and you will be able to debug it.
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Note that with the default configuration, some breakpoints will be listed as 'pending', and XCode will not stop at them. If you don't include the Mozilla's .lldbinit, you must at least put
settings set target.inline-breakpoint-strategy always in your $HOME/.lldbinit as recommended on Debugging Mozilla with lldb.
Using Mozilla-specific lldb commands
If you included the .lldbinit when Setting up lldb, you can use Mozilla-specific lldb commands in the console, located in the Debug area of XCode. For example, type
js to see the JavaScript stack. For more information, see Debugging Mozilla with lldb.
Debugging e10s child processes
Using XCode to debug child processes created by an e10s-enabled browser is a little trickier than debugging a single-process browser, but it can be done. These directions were written using XCode 6.3.1 https://zvofilx.weebly.com/ensoho-en-861-driver-download.html.
https://generoustarget856.weebly.com/winscp-alternative-for-os-x.html. Now you're ready to start debugging:
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Apple has an extensive list of debugging tips and techniques.
Questions? Problems?Mac Os X Update
Try asking in our IRC channels #developers or #macdev.
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