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react-native/React/Profiler/RCTProfileTrampoline-x86_64.S

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Refactored module access to allow for lazy loading Summary: public The `bridge.modules` dictionary provides access to all native modules, but this API requires that every module is initialized in advance so that any module can be accessed. This diff introduces a better API that will allow modules to be initialized lazily as they are needed, and deprecates `bridge.modules` (modules that use it will still work, but should be rewritten to use `bridge.moduleClasses` or `-[bridge moduleForName/Class:` instead. The rules are now as follows: * Any module that overrides `init` or `setBridge:` will be initialized on the main thread when the bridge is created * Any module that implements `constantsToExport:` will be initialized later when the config is exported (the module itself will be initialized on a background queue, but `constantsToExport:` will still be called on the main thread. * All other modules will be initialized lazily when a method is first called on them. These rules may seem slightly arcane, but they have the advantage of not violating any assumptions that may have been made by existing code - any module written under the original assumption that it would be initialized synchronously on the main thread when the bridge is created should still function exactly the same, but modules that avoid overriding `init` or `setBridge:` will now be loaded lazily. I've rewritten most of the standard modules to take advantage of this new lazy loading, with the following results: Out of the 65 modules included in UIExplorer: * 16 are initialized on the main thread when the bridge is created * A further 8 are initialized when the config is exported to JS * The remaining 41 will be initialized lazily on-demand Reviewed By: jspahrsummers Differential Revision: D2677695 fb-gh-sync-id: 507ae7e9fd6b563e89292c7371767c978e928f33
2015-11-25 11:09:00 +00:00
/**
Update copyright headers to yearless format Summary: This change drops the year from the copyright headers and the LICENSE file. Reviewed By: yungsters Differential Revision: D9727774 fbshipit-source-id: df4fc1e4390733fe774b1a160dd41b4a3d83302a
2018-09-11 22:27:47 +00:00
* Copyright (c) Facebook, Inc. and its affiliates.
Refactored module access to allow for lazy loading Summary: public The `bridge.modules` dictionary provides access to all native modules, but this API requires that every module is initialized in advance so that any module can be accessed. This diff introduces a better API that will allow modules to be initialized lazily as they are needed, and deprecates `bridge.modules` (modules that use it will still work, but should be rewritten to use `bridge.moduleClasses` or `-[bridge moduleForName/Class:` instead. The rules are now as follows: * Any module that overrides `init` or `setBridge:` will be initialized on the main thread when the bridge is created * Any module that implements `constantsToExport:` will be initialized later when the config is exported (the module itself will be initialized on a background queue, but `constantsToExport:` will still be called on the main thread. * All other modules will be initialized lazily when a method is first called on them. These rules may seem slightly arcane, but they have the advantage of not violating any assumptions that may have been made by existing code - any module written under the original assumption that it would be initialized synchronously on the main thread when the bridge is created should still function exactly the same, but modules that avoid overriding `init` or `setBridge:` will now be loaded lazily. I've rewritten most of the standard modules to take advantage of this new lazy loading, with the following results: Out of the 65 modules included in UIExplorer: * 16 are initialized on the main thread when the bridge is created * A further 8 are initialized when the config is exported to JS * The remaining 41 will be initialized lazily on-demand Reviewed By: jspahrsummers Differential Revision: D2677695 fb-gh-sync-id: 507ae7e9fd6b563e89292c7371767c978e928f33
2015-11-25 11:09:00 +00:00
*
Update license headers for MIT license Summary: Includes React Native and its dependencies Fresco, Metro, and Yoga. Excludes samples/examples/docs. find: ^(?:( *)|( *(?:[\*~#]|::))( )? *)?Copyright (?:\(c\) )?(\d{4})\b.+Facebook[\s\S]+?BSD[\s\S]+?(?:this source tree|the same directory)\.$ replace: $1$2$3Copyright (c) $4-present, Facebook, Inc.\n$2\n$1$2$3This source code is licensed under the MIT license found in the\n$1$2$3LICENSE file in the root directory of this source tree. Reviewed By: TheSavior, yungsters Differential Revision: D7007050 fbshipit-source-id: 37dd6bf0ffec0923bfc99c260bb330683f35553e
2018-02-17 02:24:55 +00:00
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
Refactored module access to allow for lazy loading Summary: public The `bridge.modules` dictionary provides access to all native modules, but this API requires that every module is initialized in advance so that any module can be accessed. This diff introduces a better API that will allow modules to be initialized lazily as they are needed, and deprecates `bridge.modules` (modules that use it will still work, but should be rewritten to use `bridge.moduleClasses` or `-[bridge moduleForName/Class:` instead. The rules are now as follows: * Any module that overrides `init` or `setBridge:` will be initialized on the main thread when the bridge is created * Any module that implements `constantsToExport:` will be initialized later when the config is exported (the module itself will be initialized on a background queue, but `constantsToExport:` will still be called on the main thread. * All other modules will be initialized lazily when a method is first called on them. These rules may seem slightly arcane, but they have the advantage of not violating any assumptions that may have been made by existing code - any module written under the original assumption that it would be initialized synchronously on the main thread when the bridge is created should still function exactly the same, but modules that avoid overriding `init` or `setBridge:` will now be loaded lazily. I've rewritten most of the standard modules to take advantage of this new lazy loading, with the following results: Out of the 65 modules included in UIExplorer: * 16 are initialized on the main thread when the bridge is created * A further 8 are initialized when the config is exported to JS * The remaining 41 will be initialized lazily on-demand Reviewed By: jspahrsummers Differential Revision: D2677695 fb-gh-sync-id: 507ae7e9fd6b563e89292c7371767c978e928f33
2015-11-25 11:09:00 +00:00
*/
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
#include "RCTDefines.h"
Prevent RCTProfileTrampoline from getting stripped Summary: public I was using `dlsym` as a more elegant way of checking if the function was defined to prevent crashes if running on an unsupported architecture, but Xcode might strip the symbol, even with `.no_dead_strip`, if there's no references to the compilation unit at all. Replace it with an ugly `#if` that checks if it's any of the supported targets and extern the function prototype. Reviewed By: jspahrsummers Differential Revision: D2581143 fb-gh-sync-id: b004ed351de97f96c04b4a6c914ce55cfcbbbcbb
2015-10-27 19:59:27 +00:00
#include "RCTMacros.h"
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
Add RCT_PROFILE define Reviewed By: tadeuzagallo Differential Revision: D3423593 fbshipit-source-id: cc04add1bee16fbb4c2491bd229f23244fe3e7bd
2016-06-13 11:16:19 +00:00
#if RCT_PROFILE && defined(__x86_64__)
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
Prevent RCTProfileTrampoline from getting stripped Summary: public I was using `dlsym` as a more elegant way of checking if the function was defined to prevent crashes if running on an unsupported architecture, but Xcode might strip the symbol, even with `.no_dead_strip`, if there's no references to the compilation unit at all. Replace it with an ugly `#if` that checks if it's any of the supported targets and extern the function prototype. Reviewed By: jspahrsummers Differential Revision: D2581143 fb-gh-sync-id: b004ed351de97f96c04b4a6c914ce55cfcbbbcbb
2015-10-27 19:59:27 +00:00
.globl SYMBOL_NAME(RCTProfileTrampoline)
SYMBOL_NAME(RCTProfileTrampoline):
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
/**
* Saves all the state so we can restore it before calling the functions being
* profiled. Registers have the same value at the point of the function call,
* the only thing we can change is the return value, so we return to
* `RCTProfileTrampoline` rather than to its caller.
*
* Save all the parameters registers (%rdi, %rsi, %rdx, %rcx, %r8, %r9), they
* have the 6 first arguments of the function call, and %rax which in special
* cases might be a pointer used for struct returns.
*
* We have to save %r12 since its value should be preserved across function
* calls and we'll use it to keep the stack pointer
*/
Preserve xmm registers on x86_64 Summary: public `%xmm` registers weren't being preserved what would cause eventual weird issues for methods using floats / doubles / etc. Reviewed By: jspahrsummers Differential Revision: D2581358 fb-gh-sync-id: 701498def0f05716c665f4749e5154b828bf41ec
2015-10-28 12:33:47 +00:00
subq $0x80+8, %rsp // 8 x 16-bytes xmm registers + 8-bytes alignment
movdqa %xmm0, 0x70(%rsp)
movdqa %xmm1, 0x60(%rsp)
movdqa %xmm2, 0x50(%rsp)
movdqa %xmm3, 0x40(%rsp)
movdqa %xmm4, 0x30(%rsp)
movdqa %xmm5, 0x20(%rsp)
movdqa %xmm6, 0x10(%rsp)
movdqa %xmm7, 0x00(%rsp)
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
pushq %rdi
pushq %rsi
pushq %rdx
pushq %rcx
pushq %r8
pushq %r9
pushq %rax
pushq %r12
/**
* Store the stack pointer in the callee saved register %r12 and align the
* stack - it has to 16-byte aligned at the point of the function call
*/
movq %rsp, %r12
andq $-0x10, %rsp
/**
* void RCTProfileGetImplementation(id object, SEL selector)
*
* This is a C function defined in `RCTProfile.m`, the object and the selector
* already have to be on %rdi and %rsi respectively, as in any ObjC call.
*/
Make React Profiler asm position independent Reviewed By: compnerd Differential Revision: D4297098 fbshipit-source-id: 567f640f2d1ed4187e53356e7ca2d066f1412f9d
2016-12-08 22:54:53 +00:00
callq SYMBOL_NAME_PIC(RCTProfileGetImplementation)
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
// Restore/unalign the stack pointer, so we can access the registers we stored
movq %r12, %rsp
/**
* pop %r12 before pushing %rax, which contains the address of the actual
* function we have to call, than we keep %r12 at the bottom of the stack to
* reference the stack pointer
*/
popq %r12
pushq %rax
pushq %r12
// align stack
movq %rsp, %r12
andq $-0x10, %rsp
/**
* Allocate memory to save parent before start profiling: the address is put
* at the bottom of the stack at the function call, so ret can actually return
* to the caller. In this case it has the address of RCTProfileTrampoline's
* caller where we'll have to return to after we're finished.
*
* We can't store it on the stack or in any register, since we have to be in
* the exact same state we were at the moment we were called, so the solution
* is to allocate a tiny bit of memory to save this address
*/
// allocate 16 bytes
movq $0x10, %rdi
Don't call libc malloc and free directly from assembly Reviewed By: strager, javache Differential Revision: D4484300 fbshipit-source-id: 97b9c2e9525f38c9158cfb499ba93d1af7d84b69
2017-03-16 19:24:11 +00:00
callq SYMBOL_NAME_PIC(RCTProfileMalloc)
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
// store the initial value of calle saved registers %r13 and %r14
movq %r13, 0x0(%rax)
movq %r14, 0x8(%rax)
// mov the pointers we need to the callee saved registers
Preserve xmm registers on x86_64 Summary: public `%xmm` registers weren't being preserved what would cause eventual weird issues for methods using floats / doubles / etc. Reviewed By: jspahrsummers Differential Revision: D2581358 fb-gh-sync-id: 701498def0f05716c665f4749e5154b828bf41ec
2015-10-28 12:33:47 +00:00
movq 0xd8(%rsp), %r13 // caller of RCTProfileTrampoline (0xd8 is stack top)
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
movq %rax, %r14 // allocated memory's address
/**
* Move self and cmd back to the registers and call start profile: it uses
* the object and the selector to label the call in the profile.
*/
movq 0x40(%r12), %rdi // object
movq 0x38(%r12), %rsi // selector
// void RCTProfileTrampolineStart(id, SEL) in RCTProfile.m
Make React Profiler asm position independent Reviewed By: compnerd Differential Revision: D4297098 fbshipit-source-id: 567f640f2d1ed4187e53356e7ca2d066f1412f9d
2016-12-08 22:54:53 +00:00
callq SYMBOL_NAME_PIC(RCTProfileTrampolineStart)
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
// unalign the stack and restore %r12
movq %r12, %rsp
popq %r12
// Restore registers for actual function call
popq %r11
popq %rax
popq %r9
popq %r8
popq %rcx
popq %rdx
popq %rsi
popq %rdi
Preserve xmm registers on x86_64 Summary: public `%xmm` registers weren't being preserved what would cause eventual weird issues for methods using floats / doubles / etc. Reviewed By: jspahrsummers Differential Revision: D2581358 fb-gh-sync-id: 701498def0f05716c665f4749e5154b828bf41ec
2015-10-28 12:33:47 +00:00
movdqa 0x00(%rsp), %xmm7
movdqa 0x10(%rsp), %xmm6
movdqa 0x20(%rsp), %xmm5
movdqa 0x30(%rsp), %xmm4
movdqa 0x40(%rsp), %xmm3
movdqa 0x50(%rsp), %xmm2
movdqa 0x60(%rsp), %xmm1
movdqa 0x70(%rsp), %xmm0
addq $0x80+8, %rsp
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
/**
* delete parent caller (saved in %r13) `call` will add the new address so
* we return to RCTProfileTrampoline rather than to its caller
*/
addq $0x8, %rsp
// call the actual function and save the return value
callq *%r11
pushq %rax
Preserve all return registers on x86_64 trampoline Summary: public Only the first quad-word and floating point return registers were being preserved, make sure to preserve the 2nd ones as well (`%rdx` and `%xmm1`) Reviewed By: jspahrsummers Differential Revision: D2727523 fb-gh-sync-id: d8176512d2dfb5f664f634ecaaf34510515506ea
2015-12-07 14:39:16 +00:00
pushq %rdx
subq $0x20, %rsp // 2 16-bytes xmm register
movdqa %xmm0, 0x00(%rsp)
movdqa %xmm1, 0x10(%rsp)
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
// void RCTProfileTrampolineEnd(void) in RCTProfile.m - just ends this profile
Make React Profiler asm position independent Reviewed By: compnerd Differential Revision: D4297098 fbshipit-source-id: 567f640f2d1ed4187e53356e7ca2d066f1412f9d
2016-12-08 22:54:53 +00:00
callq SYMBOL_NAME_PIC(RCTProfileTrampolineEnd)
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
/**
* Restore the initial value of the callee saved registers, saved in the
* memory allocated.
*/
movq %r13, %rcx
Preserve xmm registers on x86_64 Summary: public `%xmm` registers weren't being preserved what would cause eventual weird issues for methods using floats / doubles / etc. Reviewed By: jspahrsummers Differential Revision: D2581358 fb-gh-sync-id: 701498def0f05716c665f4749e5154b828bf41ec
2015-10-28 12:33:47 +00:00
movq %r14, %rdi
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
movq 0x0(%r14), %r13
movq 0x8(%r14), %r14
/**
Preserve all return registers on x86_64 trampoline Summary: public Only the first quad-word and floating point return registers were being preserved, make sure to preserve the 2nd ones as well (`%rdx` and `%xmm1`) Reviewed By: jspahrsummers Differential Revision: D2727523 fb-gh-sync-id: d8176512d2dfb5f664f634ecaaf34510515506ea
2015-12-07 14:39:16 +00:00
* save caller address and actual function return (previously in the allocated
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
* memory) and align the stack
*/
pushq %rcx
pushq %r12
movq %rsp, %r12
andq $-0x10, %rsp
// Free the memory allocated to stash callee saved registers
Don't call libc malloc and free directly from assembly Reviewed By: strager, javache Differential Revision: D4484300 fbshipit-source-id: 97b9c2e9525f38c9158cfb499ba93d1af7d84b69
2017-03-16 19:24:11 +00:00
callq SYMBOL_NAME_PIC(RCTProfileFree)
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
// unalign stack and restore %r12
movq %r12, %rsp
popq %r12
/**
Preserve all return registers on x86_64 trampoline Summary: public Only the first quad-word and floating point return registers were being preserved, make sure to preserve the 2nd ones as well (`%rdx` and `%xmm1`) Reviewed By: jspahrsummers Differential Revision: D2727523 fb-gh-sync-id: d8176512d2dfb5f664f634ecaaf34510515506ea
2015-12-07 14:39:16 +00:00
* pop the caller address to %rcx and the actual function return value(s)
* so it's the return value of RCTProfileTrampoline
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
*/
popq %rcx
Preserve all return registers on x86_64 trampoline Summary: public Only the first quad-word and floating point return registers were being preserved, make sure to preserve the 2nd ones as well (`%rdx` and `%xmm1`) Reviewed By: jspahrsummers Differential Revision: D2727523 fb-gh-sync-id: d8176512d2dfb5f664f634ecaaf34510515506ea
2015-12-07 14:39:16 +00:00
movdqa 0x00(%rsp), %xmm0
movdqa 0x10(%rsp), %xmm1
addq $0x20, %rsp
popq %rdx
Preserve xmm registers on x86_64 Summary: public `%xmm` registers weren't being preserved what would cause eventual weird issues for methods using floats / doubles / etc. Reviewed By: jspahrsummers Differential Revision: D2581358 fb-gh-sync-id: 701498def0f05716c665f4749e5154b828bf41ec
2015-10-28 12:33:47 +00:00
popq %rax
Implement asm trampoline rather forwardInvocation Summary: public The profiler overrides all the methods of all the BridgeModules, and in order to `start` and `end` the profiler at the function invocation time it used `NSInvocation`, which is slow. Replace it with a simple assembly method based on `objc_msgSend`. Reviewed By: jspahrsummers Differential Revision: D2550807 fb-gh-sync-id: 88ca08f9d6bfcd3035bda9304c93566c8818b46f
2015-10-20 11:11:38 +00:00
// jump to caller
jmpq *%rcx
#endif