* breakpoint.h (struct bpstat): Remove momentary field.
Remove bpstat_momentary_breakpoint. This was always kludgy and is no longer used. * breakpoint.h: Add enum bpstat_what. breakpoint.h (struct bpstat), breakpoint.c (bpstat_stop_status): stop and print fields of bpstat now per-breakpoint, not just one for the whole chain. breakpoint.{c,h} (bpstat_what): New function. breakpoint.h: Remove bpstat_stop and bpstat_should_print. infrun.c: Replace switch (stop_bpstat->breakpoint_at->type) with call to bpstat_what. README: Remove watchpoint/breakpoint bug from known bugs. * breakpoint.h: Prototype bpstat_find_breakpoint.
This commit is contained in:
parent
dfbfbd9632
commit
cabd4da684
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@ -1,3 +1,21 @@
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Thu Apr 8 10:15:10 1993 Jim Kingdon (kingdon@lioth.cygnus.com)
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* breakpoint.h (struct bpstat): Remove momentary field.
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Remove bpstat_momentary_breakpoint. This was always kludgy
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and is no longer used.
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* breakpoint.h: Add enum bpstat_what.
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breakpoint.h (struct bpstat), breakpoint.c (bpstat_stop_status):
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stop and print fields of bpstat now per-breakpoint, not just
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one for the whole chain.
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breakpoint.{c,h} (bpstat_what): New function.
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breakpoint.h: Remove bpstat_stop and bpstat_should_print.
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infrun.c: Replace switch (stop_bpstat->breakpoint_at->type)
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with call to bpstat_what.
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README: Remove watchpoint/breakpoint bug from known bugs.
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* breakpoint.h: Prototype bpstat_find_breakpoint.
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Thu Apr 8 16:01:21 1993 Fred Fish (fnf@cygnus.com)
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* symtab.c (find_methods, gdb_mangle_name): Note that functions
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186
gdb/breakpoint.c
186
gdb/breakpoint.c
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@ -705,16 +705,6 @@ print_it_normal (bs)
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|| (bs->breakpoint_at->type != bp_breakpoint
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&& bs->breakpoint_at->type != bp_watchpoint))
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return 0;
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/* If bpstat_stop_status says don't print, OK, we won't. An example
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circumstance is when we single-stepped for both a watchpoint and
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for a "stepi" instruction. The bpstat says that the watchpoint
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explains the stop, but we shouldn't print because the watchpoint's
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value didn't change -- and the real reason we are stopping here
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rather than continuing to step (as the watchpoint would've had us do)
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is because of the "stepi". */
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if (!bs->print)
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return 0;
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if (bs->breakpoint_at->type == bp_breakpoint)
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{
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@ -766,7 +756,7 @@ bpstat_print (bs)
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if (bs->next)
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return bpstat_print (bs->next);
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fprintf_filtered (stderr, "gdb internal error: in bpstat_print\n");
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/* We reached the end of the chain without printing anything. */
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return 0;
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}
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@ -796,7 +786,6 @@ bpstat_alloc (b, cbs)
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bs->breakpoint_at = b;
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/* If the condition is false, etc., don't do the commands. */
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bs->commands = NULL;
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bs->momentary = b->disposition == delete;
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bs->old_val = NULL;
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bs->print_it = print_it_normal;
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return bs;
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@ -872,12 +861,21 @@ which its expression is valid.\n", bs->breakpoint_at->number);
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/* This is used when everything which needs to be printed has
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already been printed. But we still want to print the frame. */
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static int
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print_it_noop (bs)
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print_it_done (bs)
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bpstat bs;
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{
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return 0;
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}
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/* This is used when nothing should be printed for this bpstat entry. */
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static int
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print_it_noop (bs)
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bpstat bs;
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{
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return -1;
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}
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/* Determine whether we stopped at a breakpoint, etc, or whether we
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don't understand this stop. Result is a chain of bpstat's such that:
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@ -903,8 +901,6 @@ bpstat_stop_status (pc, frame_address)
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FRAME_ADDR frame_address;
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{
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register struct breakpoint *b;
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int stop = 0;
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int print = 0;
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CORE_ADDR bp_addr;
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#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
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/* True if we've hit a breakpoint (as opposed to a watchpoint). */
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@ -920,9 +916,6 @@ bpstat_stop_status (pc, frame_address)
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ALL_BREAKPOINTS (b)
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{
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int this_bp_stop;
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int this_bp_print;
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if (b->enable == disabled)
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continue;
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@ -933,8 +926,8 @@ bpstat_stop_status (pc, frame_address)
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bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
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this_bp_stop = 1;
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this_bp_print = 1;
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bs->stop = 1;
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bs->print = 1;
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if (b->type == bp_watchpoint)
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{
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@ -946,7 +939,7 @@ bpstat_stop_status (pc, frame_address)
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{
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case WP_DISABLED:
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/* We've already printed what needs to be printed. */
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bs->print_it = print_it_noop;
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bs->print_it = print_it_done;
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/* Stop. */
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break;
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case WP_VALUE_CHANGED:
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break;
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case WP_VALUE_NOT_CHANGED:
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/* Don't stop. */
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bs->print_it = print_it_noop;
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bs->stop = 0;
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continue;
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default:
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/* Can't happen. */
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b->enable = disabled;
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printf_filtered ("Watchpoint %d disabled.\n", b->number);
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/* We've already printed what needs to be printed. */
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bs->print_it = print_it_noop;
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bs->print_it = print_it_done;
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/* Stop. */
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break;
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}
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@ -974,7 +969,7 @@ bpstat_stop_status (pc, frame_address)
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#endif
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if (b->frame && b->frame != frame_address)
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this_bp_stop = 0;
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bs->stop = 0;
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else
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{
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int value_is_zero;
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@ -992,12 +987,12 @@ bpstat_stop_status (pc, frame_address)
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}
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if (b->cond && value_is_zero)
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{
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this_bp_stop = 0;
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bs->stop = 0;
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}
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else if (b->ignore_count > 0)
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{
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b->ignore_count--;
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this_bp_stop = 0;
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bs->stop = 0;
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}
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else
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{
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b->enable = disabled;
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bs->commands = b->commands;
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if (b->silent)
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this_bp_print = 0;
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bs->print = 0;
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if (bs->commands && STREQ ("silent", bs->commands->line))
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{
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bs->commands = bs->commands->next;
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this_bp_print = 0;
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bs->print = 0;
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}
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}
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}
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if (this_bp_stop)
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stop = 1;
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if (this_bp_print)
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print = 1;
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/* Print nothing for this entry if we dont stop or if we dont print. */
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if (bs->stop == 0 || bs->print == 0)
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bs->print_it = print_it_noop;
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}
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bs->next = NULL; /* Terminate the chain */
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bs = root_bs->next; /* Re-grab the head of the chain */
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#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
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if (bs)
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{
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bs->stop = stop;
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bs->print = print;
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#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
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if (real_breakpoint)
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{
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*pc = bp_addr;
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write_pc (bp_addr);
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#endif /* No SHIFT_INST_REGS. */
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}
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#endif /* DECR_PC_AFTER_BREAK != 0. */
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}
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#endif /* DECR_PC_AFTER_BREAK != 0. */
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return bs;
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}
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/* Tell what to do about this bpstat. */
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enum bpstat_what
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bpstat_what (bs)
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bpstat bs;
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{
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/* Classify each bpstat as one of the following. */
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enum class {
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/* There was a watchpoint, but we're not stopping. */
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wp_nostop = 0,
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/* There was a watchpoint, stop but don't print. */
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wp_silent,
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/* There was a watchpoint, stop and print. */
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wp_noisy,
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/* There was a breakpoint but we're not stopping. */
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bp_nostop,
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/* There was a breakpoint, stop but don't print. */
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bp_silent,
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/* There was a breakpoint, stop and print. */
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bp_noisy,
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/* We hit the longjmp breakpoint. */
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long_jump,
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/* We hit the longjmp_resume breakpoint. */
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long_resume,
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/* This is just used to count how many enums there are. */
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class_last
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};
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/* Here is the table which drives this routine. So that we can
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format it pretty, we define some abbreviations for the
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enum bpstat_what codes. */
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#define keep_c BPSTAT_WHAT_KEEP_CHECKING
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#define stop_s BPSTAT_WHAT_STOP_SILENT
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#define stop_n BPSTAT_WHAT_STOP_NOISY
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#define single BPSTAT_WHAT_SINGLE
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#define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME
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#define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
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#define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
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/* "Can't happen." Might want to print an error message.
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abort() is not out of the question, but chances are GDB is just
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a bit confused, not unusable. */
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#define err BPSTAT_WHAT_STOP_NOISY
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/* Given an old action and a class, come up with a new action. */
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static const enum bpstat_what
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table[(int)class_last][(int)BPSTAT_WHAT_LAST] =
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{
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/* old action */
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/* keep_c stop_s stop_n single setlr clrlr clrlrs */
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/*wp_nostop*/ {keep_c, stop_s, stop_n, single, setlr , clrlr , clrlrs},
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/*wp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s},
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/*wp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n},
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/*bp_nostop*/ {single, stop_s, stop_n, single, setlr , clrlrs, clrlrs},
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/*bp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s},
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/*bp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n},
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/*long_jump*/ {setlr , stop_s, stop_n, setlr , err , err , err },
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/*long_resume*/ {clrlr , stop_s, stop_n, clrlrs, err , err , err }
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};
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#undef keep_c
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#undef stop_s
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#undef stop_n
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#undef single
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#undef setlr
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#undef clrlr
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#undef clrlrs
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#undef err
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enum bpstat_what current_action = BPSTAT_WHAT_KEEP_CHECKING;
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for (; bs != NULL; bs = bs->next)
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{
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enum class bs_class;
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if (bs->breakpoint_at == NULL)
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/* I suspect this can happen if it was a momentary breakpoint
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which has since been deleted. */
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continue;
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switch (bs->breakpoint_at->type)
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{
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case bp_breakpoint:
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case bp_until:
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case bp_finish:
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if (bs->stop)
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{
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if (bs->print)
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bs_class = bp_noisy;
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else
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bs_class = bp_silent;
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}
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else
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bs_class = bp_nostop;
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break;
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case bp_watchpoint:
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if (bs->stop)
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{
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if (bs->print)
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bs_class = wp_noisy;
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else
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bs_class = wp_silent;
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}
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else
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bs_class = wp_nostop;
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break;
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case bp_longjmp:
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bs_class = long_jump;
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break;
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case bp_longjmp_resume:
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bs_class = long_resume;
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break;
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}
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current_action = table[(int)bs_class][(int)current_action];
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}
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return current_action;
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}
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/* Nonzero if we should step constantly (e.g. watchpoints on machines
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without hardware support). This isn't related to a specific bpstat,
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@ -2339,7 +2452,8 @@ breakpoint_re_set_one (bint)
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s = b->cond_string;
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b->cond = parse_exp_1 (&s, (struct block *)0, 0);
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}
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mention (b);
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if (b->enable == enabled)
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mention (b);
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break;
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default:
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@ -50,21 +50,56 @@ extern bpstat bpstat_copy PARAMS ((bpstat));
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/* FIXME: prototypes uses equivalence between FRAME_ADDR and CORE_ADDR */
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extern bpstat bpstat_stop_status PARAMS ((CORE_ADDR *, CORE_ADDR));
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/* Nonzero if we should print the frame. */
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#define bpstat_should_print(bs) ((bs) != NULL && (bs)->print)
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/* Return values from bpstat_what. */
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enum bpstat_what {
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/* Perform various other tests; that is, this bpstat does not
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say to perform any action (e.g. failed watchpoint and nothing
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else). */
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BPSTAT_WHAT_KEEP_CHECKING,
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/* Nonzero if we should stop. */
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#define bpstat_stop(bs) ((bs) != NULL && (bs)->stop)
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/* Rather than distinguish between noisy and silent stops here, it
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might be cleaner to have bpstat_print make that decision (also
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taking into account stop_print_frame and source_only). But the
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implications are a bit scary (interaction with auto-displays, etc.),
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so I won't try it. */
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/* Stop silently. */
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BPSTAT_WHAT_STOP_SILENT,
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/* Stop and print. */
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BPSTAT_WHAT_STOP_NOISY,
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/* Remove breakpoints, single step once, then put them back in and
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go back to what we were doing. */
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BPSTAT_WHAT_SINGLE,
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/* Set longjmp_resume breakpoint, remove all other breakpoints,
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and continue. The "remove all other breakpoints" part is required
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if we are also stepping over another breakpoint as well as doing
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the longjmp handling. */
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BPSTAT_WHAT_SET_LONGJMP_RESUME,
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/* Clear longjmp_resume breakpoint, then handle as
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BPSTAT_WHAT_KEEP_CHECKING. */
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BPSTAT_WHAT_CLEAR_LONGJMP_RESUME,
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/* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
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BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE,
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/* This is just used to keep track of how many enums there are. */
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BPSTAT_WHAT_LAST
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};
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/* Tell what to do about this bpstat. */
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enum bpstat_what bpstat_what PARAMS ((bpstat));
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/* Find the bpstat associated with a breakpoint. NULL otherwise. */
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bpstat bpstat_find_breakpoint(/* bpstat, breakpoint */);
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/* Nonzero if we hit a momentary breakpoint. */
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#define bpstat_momentary_breakpoint(bs) ((bs) != NULL && (bs)->momentary)
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bpstat bpstat_find_breakpoint PARAMS ((bpstat, struct breakpoint *));
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/* Nonzero if a signal that we got in wait() was due to circumstances
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explained by the BS. */
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/* Currently that is true iff we have hit a breakpoint. */
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/* Currently that is true if we have hit a breakpoint, or if there is
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a watchpoint enabled. */
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#define bpstat_explains_signal(bs) ((bs) != NULL)
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/* Nonzero if we should step constantly (e.g. watchpoints on machines
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@ -102,15 +137,17 @@ struct bpstat
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struct command_line *commands;
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/* Old value associated with a watchpoint. */
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value old_val;
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/* Nonzero if we should print the frame. Only significant for the first
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bpstat in the chain. */
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/* Nonzero if this breakpoint tells us to print the frame. */
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char print;
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/* Nonzero if we should stop. Only significant for the first bpstat in
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the chain. */
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/* Nonzero if this breakpoint tells us to stop. */
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char stop;
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/* Nonzero if we hit a momentary breakpoint. Only significant for the
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first bpstat in the chain. */
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char momentary;
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/* Function called by bpstat_print to print stuff associated with
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this element of the bpstat chain. Returns 0 or 1 just like
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bpstat_print, or -1 if it can't deal with it. */
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int (*print_it) PARAMS((bpstat bs));
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};
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/* Type of breakpoint. */
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@ -121,6 +158,11 @@ struct bpstat
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2) step-resume (for 'next'ing over subroutine calls),
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3) call-dummy (the breakpoint at the end of a subroutine stub that gdb
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uses to call functions in the target).
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I definately agree with (2) and (3); I'm not as sure about (1)
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(it is a low-level thing, perhaps the best thing is that it looks
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as much as possible like a single-step to wait_for_inferior)
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-kingdon, 8 Apr 93.
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*/
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enum bptype {
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