Add basic Darwin support to libcorkscrew.

This might not seem like much, but it's already better than Mac OS'
backtrace(3).

(cherry picked from commit 2a46f6293f19b9d6100187fbd53088088e671b88)

Change-Id: I197b06c4c19f728ad6f194b2f473bd9dcd99b8a6

1 files changed, 0 insertions, 64 deletions

diff --git a/libcorkscrew/test.c b/libcorkscrew/test.c
deleted file mode 100644
index af34c03..0000000
--- a/libcorkscrew/test.c
+++ /dev/null
@@ -1,64 +0,0 @@
-#include <corkscrew/backtrace.h>
-#include <corkscrew/symbol_table.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-void do_backtrace() {
-  const size_t MAX_DEPTH = 32;
-  backtrace_frame_t* frames = (backtrace_frame_t*) malloc(sizeof(backtrace_frame_t) * MAX_DEPTH);
-  ssize_t frame_count = unwind_backtrace(frames, 0, MAX_DEPTH);
-  fprintf(stderr, "frame_count=%d\n", (int) frame_count);
-
-  backtrace_symbol_t* backtrace_symbols = (backtrace_symbol_t*) malloc(sizeof(backtrace_symbol_t) * frame_count);
-  get_backtrace_symbols(frames, frame_count, backtrace_symbols);
-
-  for (size_t i = 0; i < (size_t) frame_count; ++i) {
-    char line[MAX_BACKTRACE_LINE_LENGTH];
-    format_backtrace_line(i, &frames[i], &backtrace_symbols[i],
-                          line, MAX_BACKTRACE_LINE_LENGTH);
-    if (backtrace_symbols[i].symbol_name != NULL) {
-      // get_backtrace_symbols found the symbol's name with dladdr(3).
-      fprintf(stderr, "  %s\n", line);
-    } else {
-      // We don't have a symbol. Maybe this is a static symbol, and
-      // we can look it up?
-      symbol_table_t* symbols = NULL;
-      if (backtrace_symbols[i].map_name != NULL) {
-        symbols = load_symbol_table(backtrace_symbols[i].map_name);
-      }
-      const symbol_t* symbol = NULL;
-      if (symbols != NULL) {
-        symbol = find_symbol(symbols, frames[i].absolute_pc);
-      }
-      if (symbol != NULL) {
-        uintptr_t offset = frames[i].absolute_pc - symbol->start;
-        fprintf(stderr, "  %s (%s%+d)\n", line, symbol->name, offset);
-      } else {
-        fprintf(stderr, "  %s (\?\?\?)\n", line);
-      }
-      free_symbol_table(symbols);
-    }
-  }
-
-  free_backtrace_symbols(backtrace_symbols, frame_count);
-  free(backtrace_symbols);
-  free(frames);
-}
-
-__attribute__ ((noinline)) void g() {
-  fprintf(stderr, "g()\n");
-  do_backtrace();
-}
-
-__attribute__ ((noinline)) int f(int i) {
-  fprintf(stderr, "f(%i)\n", i);
-  if (i == 0) {
-    g();
-    return 0;
-  }
-  return f(i - 1);
-}
-
-int main() {
-  return f(5);
-}