Pointer to the stack limit
Is it possible to dynamically at run-time obtain a pointer to call stack limit? I mean the address that is the lowest address that the run-time stack can grow into without the process getting terminated with a stack overflow. I'm particularly interested in a solution that'd work on 32-bit Windows and on Dalvik. (On ART, desktop Linux, and 64-bit platforms we can make the stack "large enough" anyway.) Use case: Implementing a dynamic recursion limit. -- Henri Sivonen hsivo...@mozilla.com ___ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
Re: Pointer to the stack limit
You'll need platform-specific code, but on Windows there's https://searchfox.org/mozilla-central/rev/13788edbabb04d004e4a1ceff41d4de68a8320a2/js/xpconnect/src/XPCJSContext.cpp#986. And, to get a sense of caution, have a look at the ifdef madness surrounding the caller -- https://searchfox.org/mozilla-central/rev/13788edbabb04d004e4a1ceff41d4de68a8320a2/js/xpconnect/src/XPCJSContext.cpp#1125 -- to see the number of hoops we have to jump through to accommodate various build configs. On Wed, Dec 19, 2018, at 7:12 AM, Henri Sivonen wrote: > Is it possible to dynamically at run-time obtain a pointer to call > stack limit? I mean the address that is the lowest address that the > run-time stack can grow into without the process getting terminated > with a stack overflow. > > I'm particularly interested in a solution that'd work on 32-bit > Windows and on Dalvik. (On ART, desktop Linux, and 64-bit platforms we > can make the stack "large enough" anyway.) > > Use case: Implementing a dynamic recursion limit. > > -- > Henri Sivonen > hsivo...@mozilla.com > ___ > dev-platform mailing list > dev-platform@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-platform ___ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
Re: Pointer to the stack limit
On Wed, Dec 19, 2018 at 2:37 PM David Major wrote: > You'll need platform-specific code, but on Windows there's > https://searchfox.org/mozilla-central/rev/13788edbabb04d004e4a1ceff41d4de68a8320a2/js/xpconnect/src/XPCJSContext.cpp#986. > > And, to get a sense of caution, have a look at the ifdef madness surrounding > the caller -- > https://searchfox.org/mozilla-central/rev/13788edbabb04d004e4a1ceff41d4de68a8320a2/js/xpconnect/src/XPCJSContext.cpp#1125 > -- to see the number of hoops we have to jump through to accommodate various > build configs. Thanks. It looks like the Android case just hard-codes a limit that works for Dalvik instead of querying from the OS or ever querying for the API level to decide between a limit that works for Dalvik and a limit that works for ART. (On IRC, I was pointed to the code that uses the limit: https://searchfox.org/mozilla-central/search?q=symbol:_ZN2js19CheckRecursionLimitEP9JSContext&redirect=false ) -- Henri Sivonen hsivo...@mozilla.com ___ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
Re: Pointer to the stack limit
On Wed, Dec 19, 2018 at 07:36:52AM -0500, David Major wrote: You'll need platform-specific code, but on Windows there's https://searchfox.org/mozilla-central/rev/13788edbabb04d004e4a1ceff41d4de68a8320a2/js/xpconnect/src/XPCJSContext.cpp#986. And, to get a sense of caution, have a look at the ifdef madness surrounding the caller -- https://searchfox.org/mozilla-central/rev/13788edbabb04d004e4a1ceff41d4de68a8320a2/js/xpconnect/src/XPCJSContext.cpp#1125 -- to see the number of hoops we have to jump through to accommodate various build configs. For glibc Linux, there's also: https://searchfox.org/mozilla-central/rev/2e5e28f518524f8af5b158ddb605022b6a2d68cf/xpcom/threads/nsThread.cpp#506-557 Other Unix platforms require similarly super-specific code. On Wed, Dec 19, 2018, at 7:12 AM, Henri Sivonen wrote: Is it possible to dynamically at run-time obtain a pointer to call stack limit? I mean the address that is the lowest address that the run-time stack can grow into without the process getting terminated with a stack overflow. I'm particularly interested in a solution that'd work on 32-bit Windows and on Dalvik. (On ART, desktop Linux, and 64-bit platforms we can make the stack "large enough" anyway.) Use case: Implementing a dynamic recursion limit. ___ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
