From b31c4970aa63ec41cd1cdb97c58b83139673d39f Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <mailroxas@gmail.com>
Date: Thu, 19 Apr 2018 19:01:05 +0300
Subject: wrapper: fix trace blocking / fix indentation

---
 src/wrapper/wrapper.c | 112 ++++++++++++++++++++++++++------------------------
 1 file changed, 59 insertions(+), 53 deletions(-)

diff --git a/src/wrapper/wrapper.c b/src/wrapper/wrapper.c
index 51d17a6..d78f1a4 100644
--- a/src/wrapper/wrapper.c
+++ b/src/wrapper/wrapper.c
@@ -11,9 +11,14 @@
 #include "verbose.h"
 #include <pthread.h>
 
+static __thread bool skip_trace;
+
 void
 verbose_log(const char *fmt, ...)
 {
+   if (skip_trace)
+      return;
+
    static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
    pthread_mutex_lock(&mutex);
    fprintf(stderr, "%lu: ", pthread_self());
@@ -26,56 +31,57 @@ verbose_log(const char *fmt, ...)
 }
 
 #ifdef VERBOSE_FUNCTIONS
-#   ifdef ANDROID_X86_LINKER
+#  ifdef ANDROID_X86_LINKER
 __asm__(
-    "wrapper_start: nop\n"
-    "wrapper_symbol: pushl $0xFAFBFCFD\n"
-    "wrapper_trace: movl $0xFAFBFCFD, %eax\ncall *%eax\npop %eax\n"
-    "wrapper_call: movl $0xFAFBFCFD, %eax\njmp *%eax\n"
-    "wrapper_end: nop\n"
+   "wrapper_start: nop\n"
+   "wrapper_symbol: pushl $0xFAFBFCFD\n"
+   "wrapper_trace: movl $0xFAFBFCFD, %eax\ncall *%eax\npop %eax\n"
+   "wrapper_call: movl $0xFAFBFCFD, %eax\njmp *%eax\n"
+   "wrapper_end: nop\n"
 );
-#       define WRAPPER_TRACE
-#   else
-#       warning "no wrapper asm for this platform, function tracing is not available"
-#   endif
+#     define WRAPPER_TRACE
+#  else
+#     warning "no wrapper asm for this platform, function tracing is not available"
+#  endif
 #endif
 
 #ifdef WRAPPER_TRACE
 extern char wrapper_start, wrapper_symbol, wrapper_trace, wrapper_call, wrapper_end;
 
 static union {
-    void *ptr;
-    char* (*fun)(const char *mangled_name, char *output_buffer, size_t *length, int *status);
+   void *ptr;
+   char* (*fun)(const char *mangled_name, char *output_buffer, size_t *length, int *status);
 } __cxa_demangle;
 
 static void
 trace(const char *const symbol)
 {
-    assert(symbol);
-
-    if (__cxa_demangle.ptr) {
-        // >If output_buffer is not long enough, it is expanded using realloc
-        // Holy fuck gcc what the fuck? Guess we don't use stack then, thanks
-        int status;
-        char *demangled;
-        static __thread char *data;
-        static __thread size_t size;
-        static __thread bool skip_trace;
-
-        // Avoid infinite recursion and tracing calls made by __cxa_demangle.fun
-        if (skip_trace)
-            return;
-
-        skip_trace = true;
-        if ((demangled = __cxa_demangle.fun(symbol, data, &size, &status))) {
-            data = (data != demangled ? demangled : data);
-            verbose("trace: %s", demangled);
-            return;
-        }
-        skip_trace = false;
-    }
-
-    verbose("trace: %s", symbol);
+   assert(symbol);
+
+   if (__cxa_demangle.ptr) {
+      // >If output_buffer is not long enough, it is expanded using realloc
+      // Holy fuck gcc what the fuck? Guess we don't use stack then, thanks
+      int status;
+      char *demangled;
+      static __thread char *data;
+      static __thread size_t size;
+
+      // Avoid infinite recursion and tracing calls made by __cxa_demangle.fun
+      if (skip_trace)
+         return;
+
+      skip_trace = true;
+      demangled = __cxa_demangle.fun(symbol, data, &size, &status);
+      skip_trace = false;
+
+      if (demangled) {
+         data = (data != demangled ? demangled : data);
+         verbose("trace: %s", demangled);
+         return;
+      }
+   }
+
+   verbose("trace: %s", symbol);
 }
 #endif
 
@@ -83,35 +89,35 @@ void
 wrapper_set_cpp_demangler(void *function)
 {
 #ifdef WRAPPER_TRACE
-    __cxa_demangle.ptr = function;
+   __cxa_demangle.ptr = function;
 #endif
 }
 
 void*
 wrapper_create(const char *const symbol, void *function)
 {
-    assert(symbol);
+   assert(symbol);
 
-    if (!function) {
-        verbose_log("FIXME: unimplemented symbol: %s", symbol);
-        return NULL;
-    }
+   if (!function) {
+      verbose_log("FIXME: unimplemented symbol: %s", symbol);
+      return NULL;
+   }
 
 #ifdef WRAPPER_TRACE
-    const size_t sz = &wrapper_end - &wrapper_start;
-    unsigned char *fun = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-    assert(fun != MAP_FAILED);
-    memcpy(fun, &wrapper_start, sz);
+   const size_t sz = &wrapper_end - &wrapper_start;
+   unsigned char *fun = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+   assert(fun != MAP_FAILED);
+   memcpy(fun, &wrapper_start, sz);
 #ifdef ANDROID_X86_LINKER
-    memcpy(fun + (&wrapper_symbol - &wrapper_start) + 1, &symbol, sizeof(symbol));
-    memcpy(fun + (&wrapper_trace - &wrapper_start) + 1, (uintptr_t[]){ (uintptr_t)trace }, sizeof(uintptr_t));
-    memcpy(fun + (&wrapper_call - &wrapper_start) + 1, &function, sizeof(function));
+   memcpy(fun + (&wrapper_symbol - &wrapper_start) + 1, &symbol, sizeof(symbol));
+   memcpy(fun + (&wrapper_trace - &wrapper_start) + 1, (uintptr_t[]){ (uintptr_t)trace }, sizeof(uintptr_t));
+   memcpy(fun + (&wrapper_call - &wrapper_start) + 1, &function, sizeof(function));
 #else
 #   error "you forgot to implement the pointer setups for your asm platform"
 #endif
-    mprotect(fun, sz, PROT_READ | PROT_EXEC);
-    return fun;
+   mprotect(fun, sz, PROT_READ | PROT_EXEC);
+   return fun;
 #else
-    return function;
+   return function;
 #endif
 }
-- 
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