Make React Profiler asm position independent

Reviewed By: compnerd

Differential Revision: D4297098

fbshipit-source-id: 567f640f2d1ed4187e53356e7ca2d066f1412f9d

React/Profiler/RCTMacros.h

@@ -10,4 +10,9 @@
 #define _CONCAT(A, B) A##B
 #define CONCAT(A, B) _CONCAT(A, B)
 
-#define SYMBOL_NAME(S) CONCAT(__USER_LABEL_PREFIX__, S)
+#if !defined(PIC_MODIFIER)
+#define PIC_MODIFIER
+#endif
+
+#define SYMBOL_NAME(name) CONCAT(__USER_LABEL_PREFIX__, name)
+#define SYMBOL_NAME_PIC(name) CONCAT(SYMBOL_NAME(name), PIC_MODIFIER)

React/Profiler/RCTProfileTrampoline-x86_64.S

@@ -59,7 +59,7 @@ SYMBOL_NAME(RCTProfileTrampoline):
    * 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.
    */
-  callq SYMBOL_NAME(RCTProfileGetImplementation)
+  callq SYMBOL_NAME_PIC(RCTProfileGetImplementation)
 
   // Restore/unalign the stack pointer, so we can access the registers we stored
   movq %r12, %rsp
@@ -90,7 +90,7 @@ SYMBOL_NAME(RCTProfileTrampoline):
 
   // allocate 16 bytes
   movq $0x10, %rdi
-  callq SYMBOL_NAME(malloc)
+  callq SYMBOL_NAME_PIC(malloc)
 
   // store the initial value of calle saved registers %r13 and %r14
   movq %r13, 0x0(%rax)
@@ -108,7 +108,7 @@ SYMBOL_NAME(RCTProfileTrampoline):
   movq 0x38(%r12), %rsi // selector
 
   // void RCTProfileTrampolineStart(id, SEL) in RCTProfile.m
-  callq SYMBOL_NAME(RCTProfileTrampolineStart)
+  callq SYMBOL_NAME_PIC(RCTProfileTrampolineStart)
 
   // unalign the stack and restore %r12
   movq %r12, %rsp
@@ -148,7 +148,7 @@ SYMBOL_NAME(RCTProfileTrampoline):
   movdqa %xmm1, 0x10(%rsp)
 
   // void RCTProfileTrampolineEnd(void) in RCTProfile.m - just ends this profile
-  callq SYMBOL_NAME(RCTProfileTrampolineEnd)
+  callq SYMBOL_NAME_PIC(RCTProfileTrampolineEnd)
 
   /**
    * Restore the initial value of the callee saved registers, saved in the
@@ -169,7 +169,7 @@ SYMBOL_NAME(RCTProfileTrampoline):
   andq $-0x10, %rsp
 
   // Free the memory allocated to stash callee saved registers
-  callq SYMBOL_NAME(free)
+  callq SYMBOL_NAME_PIC(free)
 
   // unalign  stack and restore %r12
   movq %r12, %rsp