diff options
Diffstat (limited to 'libguile/backtrace.c')
-rw-r--r-- | libguile/backtrace.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libguile/backtrace.c b/libguile/backtrace.c index 7e93ff3f5..70bb7fba9 100644 --- a/libguile/backtrace.c +++ b/libguile/backtrace.c @@ -55,6 +55,42 @@ * Note that these functions shouldn't generate errors themselves. */ +static SCM +boot_print_exception (SCM port, SCM frame, SCM key, SCM args) +#define FUNC_NAME "boot-print-exception" +{ + scm_puts ("Throw to key ", port); + scm_write (key, port); + scm_puts (" with args ", port); + scm_write (args, port); + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM +scm_print_exception (SCM port, SCM frame, SCM key, SCM args) +#define FUNC_NAME "print-exception" +{ + static SCM print_exception = SCM_BOOL_F; + + SCM_VALIDATE_OPOUTPORT (1, port); + if (scm_is_true (frame)) + SCM_VALIDATE_FRAME (2, frame); + SCM_VALIDATE_SYMBOL (3, key); + SCM_VALIDATE_LIST (4, args); + + if (scm_is_false (print_exception)) + print_exception = scm_c_module_lookup (scm_the_root_module (), + "print-exception"); + + return scm_call_4 (scm_variable_ref (print_exception), + port, frame, key, args); +} +#undef FUNC_NAME + + + + /* Print parameters for error messages. */ #define DISPLAY_ERROR_MESSAGE_MAX_LEVEL 7 @@ -72,6 +108,7 @@ if (!(_cond)) \ return SCM_BOOL_F; + static void display_header (SCM source, SCM port) { @@ -734,6 +771,7 @@ scm_backtrace (void) void scm_init_backtrace () { + scm_c_define_gsubr ("print-exception", 4, 0, 0, boot_print_exception); #include "libguile/backtrace.x" } |