From b9d6130764916fac3d9bcfde2d672053a0ef3316 Mon Sep 17 00:00:00 2001 From: Simon Marchi Date: Mon, 2 Feb 2015 14:57:31 -0500 Subject: [PATCH] "enable count" user input error handling (PR gdb/15678) Typing "enable count" by itself crashes GDB. Also, if you omit the breakpoint number/range, the error message is not very clear: (gdb) enable count 2 warning: bad breakpoint number at or near '' (gdb) enable count Segmentation fault (core dumped) With this patch, the error messages are slightly more helpful: (gdb) enable count 2 Argument required (one or more breakpoint numbers). (gdb) enable count Argument required (hit count). gdb/ChangeLog: PR gdb/15678 * breakpoint.c (map_breakpoint_numbers): Check for empty args string. (enable_count_command): Check args for NULL value. gdb/testsuite/ChangeLog: PR gdb/15678 * gdb.base/ena-dis-br.exp: Test "enable count" for bad user input. --- gdb/ChangeLog | 6 ++++++ gdb/breakpoint.c | 9 +++++++-- gdb/testsuite/ChangeLog | 5 +++++ gdb/testsuite/gdb.base/ena-dis-br.exp | 8 ++++++++ 4 files changed, 26 insertions(+), 2 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 7c7e878d84d..dbeef19e1d6 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,9 @@ +2015-02-06 Simon Marchi + + PR gdb/15678 + * breakpoint.c (map_breakpoint_numbers): Check for empty args string. + (enable_count_command): Check args for NULL value. + 2015-02-05 Doug Evans * guile/scm-frame.c: Fix spelling errors in a comment. diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c index af0c2cfcda8..2804453060a 100644 --- a/gdb/breakpoint.c +++ b/gdb/breakpoint.c @@ -14880,7 +14880,7 @@ map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *, int match; struct get_number_or_range_state state; - if (args == 0) + if (args == 0 || *args == '\0') error_no_arg (_("one or more breakpoint numbers")); init_number_or_range (&state, args); @@ -15217,7 +15217,12 @@ do_map_enable_count_breakpoint (struct breakpoint *bpt, void *countptr) static void enable_count_command (char *args, int from_tty) { - int count = get_number (&args); + int count; + + if (args == NULL) + error_no_arg (_("hit count")); + + count = get_number (&args); map_breakpoint_numbers (args, do_map_enable_count_breakpoint, &count); } diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index f8ca4e88e07..c458bd7efb0 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2015-02-06 Simon Marchi + + PR gdb/15678 + * gdb.base/ena-dis-br.exp: Test "enable count" for bad user input. + 2015-02-06 Pedro Alves * gdb.threads/attach-many-short-lived-threads.c (SECONDS): New diff --git a/gdb/testsuite/gdb.base/ena-dis-br.exp b/gdb/testsuite/gdb.base/ena-dis-br.exp index adb4001b67f..84f84cae4ea 100644 --- a/gdb/testsuite/gdb.base/ena-dis-br.exp +++ b/gdb/testsuite/gdb.base/ena-dis-br.exp @@ -151,6 +151,14 @@ set bp [break_at $bp_location7 "line $bp_location7"] set bp2 [break_at marker1 " line $bp_location15"] +gdb_test "enable count" \ + "Argument required \\(hit count\\)\\." \ + "enable count missing arguments" + +gdb_test "enable count 2" \ + "Argument required \\(one or more breakpoint numbers\\)\\." \ + "enable count missing breakpoint number" + gdb_test_no_output "enable count 2 $bp" "disable break with count" gdb_test "continue" \ -- 2.30.2