Print stack trace if $TOMO_STACKTRACE is set

builtins/functions.c

@@ -41,7 +41,7 @@ public void tomo_init(void)
        errx(1, "Couldn't set printf specifier");
 }
 
-static void print_stack_trace(FILE *out)
+void print_stack_trace(FILE *out, int start, int stop)
 {
     // Print stack trace:
     fprintf(out, "\x1b[34m");
@@ -49,7 +49,7 @@ static void print_stack_trace(FILE *out)
     void *array[1024];
     int64_t size = (int64_t)backtrace(array, sizeof(array)/sizeof(array[0]));
     char **strings = strings = backtrace_symbols(array, size);
-    for (int64_t i = 2; i < size - 4; i++) {
+    for (int64_t i = start; i < size - stop; i++) {
         char *filename = strings[i];
         const char *cmd = heap_strf("addr2line -e %.*s -fisp | sed 's/\\$/./g;s/ at /() at /' >&2", strcspn(filename, "("), filename);
         FILE *fp = popen(cmd, "w");
@@ -60,6 +60,7 @@ static void print_stack_trace(FILE *out)
         pclose(fp);
     }
     fprintf(out, "\x1b[m");
+    fflush(out);
 }
 
 public void fail(const char *fmt, ...)
@@ -72,7 +73,7 @@ public void fail(const char *fmt, ...)
     if (USE_COLOR) fputs("\x1b[m", stderr);
     fputs("\n\n", stderr);
     va_end(args);
-    print_stack_trace(stderr);
+    print_stack_trace(stderr, 2, 4);
     fflush(stderr);
     raise(SIGABRT);
 }
@@ -95,7 +96,7 @@ public void fail_source(const char *filename, int64_t start, int64_t end, const
     }
     if (USE_COLOR) fputs("\x1b[m", stderr);
 
-    print_stack_trace(stderr);
+    print_stack_trace(stderr, 2, 4);
     fflush(stderr);
     raise(SIGABRT);
 }
@@ -240,7 +241,7 @@ public void end_test(const void *expr, const TypeInfo *type, const char *expecte
                     : "\n==================== TEST FAILED ====================\nExpected: %s\n\n But got: %k\n\n",
                     expected, &expr_text);
 
-            print_stack_trace(stderr);
+            print_stack_trace(stderr, 2, 4);
             fflush(stderr);
             raise(SIGABRT);
         }

builtins/functions.h

@@ -28,5 +28,6 @@ Text_t generic_as_text(const void *obj, bool colorize, const TypeInfo *type);
 int generic_print(const void *obj, bool colorize, const TypeInfo *type);
 closure_t spawn(closure_t fn);
 bool pop_flag(char **argv, int *i, const char *flag, Text_t *result);
+void print_stack_trace(FILE *out, int start, int stop);
 
 // vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0

environment.c

@@ -3,11 +3,12 @@
 #include <stdlib.h>
 #include <signal.h>
 
-#include "environment.h"
+#include "builtins/functions.h"
 #include "builtins/table.h"
 #include "builtins/text.h"
-#include "typecheck.h"
 #include "builtins/util.h"
+#include "environment.h"
+#include "typecheck.h"
 
 type_t *TEXT_TYPE = NULL;
 type_t *RANGE_TYPE = NULL;
@@ -588,6 +589,9 @@ void compiler_err(file_t *f, const char *start, const char *end, const char *fmt
     if (f && start && end)
         highlight_error(f, start, end, "\x1b[31;1m", 2, isatty(STDERR_FILENO) && !getenv("NO_COLOR"));
 
+    if (getenv("TOMO_STACKTRACE"))
+        print_stack_trace(stderr, 1, 3);
+
     raise(SIGABRT);
     exit(1);
 }

parse.c

@@ -11,6 +11,7 @@
 #include <signal.h>
 
 #include "ast.h"
+#include "builtins/functions.h"
 #include "builtins/integers.h"
 #include "builtins/text.h"
 #include "builtins/table.h"
@@ -134,8 +135,12 @@ static void vparser_err(parse_ctx_t *ctx, const char *start, const char *end, co
     highlight_error(ctx->file, start, end, "\x1b[31;1;7m", 2, isatty(STDERR_FILENO) && !getenv("NO_COLOR"));
     fputs("\n", stderr);
 
+    if (getenv("TOMO_STACKTRACE"))
+        print_stack_trace(stderr, 1, 3);
+
     if (ctx->on_err)
         longjmp(*ctx->on_err, 1);
+
     raise(SIGABRT);
     exit(1);
 }