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gdb/
* frame.c (frame_unwind_register): Throw an error if unwinding the register failed. * get_prev_frame_1 (get_prev_frame_1): Ask the unwinder if there's an unwind stop reason. (frame_stop_reason_string): Handle UNWIND_UNAVAILABLE. * frame.h (enum unwind_stop_reason) <UNWIND_OUTERMOST, UNWIND_UNAVAILABLE>: New. * inline-frame.c (inline_frame_unwind): Install default_frame_unwind_stop_reason. * frame-unwind.c: Include "exceptions.h". (frame_unwind_find_by_frame): Swallow NOT_AVAILABLE_ERROR errors. (default_frame_unwind_stop_reason): New. * frame-unwind.h (frame_unwind_stop_reason_ftype): New typedef. (default_frame_unwind_stop_reason): Declare. (struct frame_unwind) <stop_reason>: New function pointer. * dummy-frame.c: Install default_frame_unwind_stop_reason. * dwarf2-frame.c: Include exceptions.h. (struct dwarf2_frame_cache) <unavailable_retaddr>: New field. (dwarf2_frame_cache): Swallow NOT_AVAILABLE_ERROR errors when computing the CFA. If such an error was thrown, set unavailable_retaddr. (dwarf2_frame_unwind_stop_reason): New. (dwarf2_frame_this_id): Don't build a frame id if the CFA was unavailable. (dwarf2_frame_unwind): Install dwarf2_frame_unwind_stop_reason. (dwarf2_signal_frame_unwind): Ditto. * amd64-tdep.c: Include "exceptions.h". (struct amd64_frame_cache): New field "base_p". (amd64_init_frame_cache): Clear it. (amd64_frame_cache_1): New, factored out from amd64_frame_cache. Avoid reading registers with functions that throw if the register is not necessary to compute the frame base. (amd64_frame_cache): Reimplement wrapping amd64_frame_cache_1, and swallowing NOT_AVAILABLE_ERROR. (amd64_frame_unwind_stop_reason): New. (amd64_frame_this_id): Don't build a frame id if the frame base was unavailable. (amd64_frame_unwind): Install amd64_frame_unwind_stop_reason. (amd64_sigtramp_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set base_p if the frame base was computable. (amd64_sigtramp_frame_unwind_stop_reason): New. (amd64_sigtramp_frame_this_id): Don't build a frame id if the frame base was unavailable. (amd64_sigtramp_frame_unwind): Install amd64_sigtramp_frame_unwind_stop_reason. (amd64_epilogue_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set base_p if the frame base was computable. (amd64_epilogue_frame_unwind_stop_reason): New. (amd64_epilogue_frame_this_id): Don't build a frame id if the frame base was unavailable. (amd64_epilogue_frame_unwind): Install amd64_epilogue_frame_unwind_stop_reason. * i386-tdep.c: Include "exceptions.h". (struct i386_frame_cache): New field "base_p". (i386_init_frame_cache): Clear it. (i386_frame_cache_1): New, factored out from amd64_frame_cache. Avoid reading registers with functions that throw if the register is not necessary to compute the frame base. (i386_frame_cache): Reimplement wrapping amd64_frame_cache_1, and swallowing NOT_AVAILABLE_ERROR. (i386_frame_unwind_stop_reason): New. (i386_frame_this_id): Don't build a frame id if the frame base was unavailable. (i386_frame_prev_register): Handle unavailable SP. (i386_frame_unwind): Install i386_frame_unwind_stop_reason. (i386_epilogue_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set base_p if the frame base was computable. (i386_epilogue_frame_unwind_stop_reason): New. (i386_epilogue_frame_this_id): Don't build a frame id if the frame base was unavailable. (i386_epilogue_frame_unwind): Install i386_epilogue_frame_unwind_stop_reason. (i386_sigtramp_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set base_p if the frame base was computable. (i386_sigtramp_frame_unwind_stop_reason): New. (i386_sigtramp_frame_this_id): Don't build a frame id if the frame base was unavailable. (i386_sigtramp_frame_unwind): Install i386_sigtramp_frame_unwind_stop_reason. * sentinel-frame.c (sentinel_frame_prev_register): Use the value type's size, not the register's. (sentinel_frame_unwind): Install default_frame_unwind_stop_reason. * alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind): Install default_frame_unwind_stop_reason. * alpha-tdep.c (alpha_sigtramp_frame_unwind) (alpha_heuristic_frame_unwind): Ditto. * amd64obsd-tdep.c (amd64obsd_trapframe_unwind): Ditto. * arm-tdep.c (arm_prologue_unwind, arm_stub_unwind): Ditto. * avr-tdep.c (avr_frame_unwind): Ditto. * cris-tdep.c (cris_sigtramp_frame_unwind, cris_frame_unwind): Ditto. * frv-linux-tdep.c (frv_linux_sigtramp_frame_unwind): Ditto. * frv-tdep.c (frv_frame_unwind): Ditto. * h8300-tdep.c (h8300_frame_unwind): Ditto. * hppa-hpux-tdep.c (hppa_hpux_sigtramp_frame_unwind): Ditto. * hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind): Ditto. * hppa-tdep.c (hppa_frame_unwind, hppa_fallback_frame_unwind) (hppa_stub_frame_unwind): Ditto. * i386obsd-tdep.c (i386obsd_trapframe_unwind): Ditto. * ia64-tdep.c (ia64_frame_unwind, ia64_sigtramp_frame_unwind) (ia64_libunwind_frame_unwind) (ia64_libunwind_sigtramp_frame_unwind): Ditto. * iq2000-tdep.c (iq2000_frame_unwind): Ditto. * lm32-tdep.c (lm32_frame_unwind): Ditto. * m32c-tdep.c (m32c_unwind): Ditto. * m32r-linux-tdep.c (m32r_linux_sigtramp_frame_unwind): Ditto. * m32r-tdep.c (m32r_frame_unwind): Ditto. * m68hc11-tdep.c (m68hc11_frame_unwind): Ditto. * m68k-tdep.c (m68k_frame_unwind): Ditto. * m68klinux-tdep.c (m68k_linux_sigtramp_frame_unwind): Ditto. * m88k-tdep.c (m88k_frame_unwind): Ditto. * mep-tdep.c (mep_frame_unwind): Ditto. * microblaze-tdep.c (microblaze_frame_unwind): Ditto. * mips-tdep.c (mips_insn16_frame_unwind, mips_insn32_frame_unwind) (mips_stub_frame_unwind): Ditto. * mn10300-tdep.c (mn10300_frame_unwind): Ditto. * moxie-tdep.c (moxie_frame_unwind): Ditto. * mt-tdep.c (mt_frame_unwind): Ditto. * ppc-linux-tdep.c (ppu2spu_unwind): Ditto. * ppcobsd-tdep.c (ppcobsd_sigtramp_frame_unwind): Ditto. * rs6000-tdep.c (rs6000_frame_unwind): Ditto. * s390-tdep.c (s390_frame_unwind, s390_stub_frame_unwind) (s390_sigtramp_frame_unwind): Ditto. * score-tdep.c (score_prologue_unwind): Ditto. * sh-tdep.c (sh_frame_unwind): Ditto. * sh64-tdep.c (sh64_frame_unwind): Ditto. * sparc-sol2-tdep.c (sparc32_sol2_sigtramp_frame_unwind): Ditto. * sparc-tdep.c (sparc32_frame_unwind): Ditto. * sparc64-sol2-tdep.c (sparc64_sol2_sigtramp_frame_unwind): Ditto. * sparc64-tdep.c (sparc64_frame_unwind): Ditto. * sparc64fbsd-tdep.c (sparc64fbsd_sigtramp_frame_unwind): Ditto. * sparc64nbsd-tdep.c (sparc64nbsd_sigcontext_frame_unwind): Ditto. * sparc64obsd-tdep.c (sparc64obsd_frame_unwind) (sparc64obsd_trapframe_unwind): Ditto. * sparcnbsd-tdep.c (sparc32nbsd_sigcontext_frame_unwind): Ditto. * sparcobsd-tdep.c (sparc32obsd_sigtramp_frame_unwind): Ditto. * spu-tdep.c (spu_frame_unwind, spu2ppu_unwind): Ditto. * v850-tdep.c (v850_frame_unwind): Ditto. * vax-tdep.c (vax_frame_unwind): Ditto. * vaxobsd-tdep.c (vaxobsd_sigtramp_frame_unwind): Ditto. * xstormy16-tdep.c (frame_unwind xstormy16_frame_unwind): Ditto. * xtensa-tdep.c (xtensa_unwind): Ditto.
This commit is contained in:
Pedro Alves
@ -40,6 +40,7 @@
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#include "dwarf2-frame.h"
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#include "ax.h"
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#include "dwarf2loc.h"
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#include "exceptions.h"
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struct comp_unit;
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@ -986,6 +987,10 @@ struct dwarf2_frame_cache
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/* DWARF Call Frame Address. */
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CORE_ADDR cfa;
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/* Set if the return address column was marked as unavailable
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(required non-collected memory or registers to compute). */
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int unavailable_retaddr;
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/* Set if the return address column was marked as undefined. */
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int undefined_retaddr;
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@ -1013,6 +1018,7 @@ dwarf2_frame_cache (struct frame_info *this_frame, void **this_cache)
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struct dwarf2_frame_cache *cache;
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struct dwarf2_frame_state *fs;
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struct dwarf2_fde *fde;
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volatile struct gdb_exception ex;
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if (*this_cache)
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return *this_cache;
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@ -1020,10 +1026,10 @@ dwarf2_frame_cache (struct frame_info *this_frame, void **this_cache)
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/* Allocate a new cache. */
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cache = FRAME_OBSTACK_ZALLOC (struct dwarf2_frame_cache);
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cache->reg = FRAME_OBSTACK_CALLOC (num_regs, struct dwarf2_frame_state_reg);
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*this_cache = cache;
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/* Allocate and initialize the frame state. */
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fs = XMALLOC (struct dwarf2_frame_state);
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memset (fs, 0, sizeof (struct dwarf2_frame_state));
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fs = XZALLOC (struct dwarf2_frame_state);
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old_chain = make_cleanup (dwarf2_frame_state_free, fs);
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/* Unwind the PC.
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@ -1068,26 +1074,39 @@ dwarf2_frame_cache (struct frame_info *this_frame, void **this_cache)
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execute_cfa_program (fde, fde->instructions, fde->end, gdbarch,
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get_frame_pc (this_frame), fs);
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/* Calculate the CFA. */
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switch (fs->regs.cfa_how)
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TRY_CATCH (ex, RETURN_MASK_ERROR)
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{
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case CFA_REG_OFFSET:
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cache->cfa = read_reg (this_frame, fs->regs.cfa_reg);
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if (fs->armcc_cfa_offsets_reversed)
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cache->cfa -= fs->regs.cfa_offset;
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else
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cache->cfa += fs->regs.cfa_offset;
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break;
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/* Calculate the CFA. */
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switch (fs->regs.cfa_how)
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{
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case CFA_REG_OFFSET:
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cache->cfa = read_reg (this_frame, fs->regs.cfa_reg);
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if (fs->armcc_cfa_offsets_reversed)
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cache->cfa -= fs->regs.cfa_offset;
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else
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cache->cfa += fs->regs.cfa_offset;
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break;
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case CFA_EXP:
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cache->cfa =
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execute_stack_op (fs->regs.cfa_exp, fs->regs.cfa_exp_len,
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cache->addr_size, cache->text_offset,
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this_frame, 0, 0);
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break;
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case CFA_EXP:
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cache->cfa =
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execute_stack_op (fs->regs.cfa_exp, fs->regs.cfa_exp_len,
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cache->addr_size, cache->text_offset,
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this_frame, 0, 0);
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break;
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default:
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internal_error (__FILE__, __LINE__, _("Unknown CFA rule."));
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default:
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internal_error (__FILE__, __LINE__, _("Unknown CFA rule."));
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}
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}
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if (ex.reason < 0)
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{
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if (ex.error == NOT_AVAILABLE_ERROR)
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{
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cache->unavailable_retaddr = 1;
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return cache;
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}
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throw_exception (ex);
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}
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/* Initialize the register state. */
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@ -1193,10 +1212,25 @@ incomplete CFI data; unspecified registers (e.g., %s) at %s"),
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do_cleanups (old_chain);
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*this_cache = cache;
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return cache;
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}
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static enum unwind_stop_reason
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dwarf2_frame_unwind_stop_reason (struct frame_info *this_frame,
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void **this_cache)
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{
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struct dwarf2_frame_cache *cache
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= dwarf2_frame_cache (this_frame, this_cache);
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if (cache->unavailable_retaddr)
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return UNWIND_UNAVAILABLE;
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if (cache->undefined_retaddr)
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return UNWIND_OUTERMOST;
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return UNWIND_NO_REASON;
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}
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static void
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dwarf2_frame_this_id (struct frame_info *this_frame, void **this_cache,
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struct frame_id *this_id)
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@ -1204,6 +1238,9 @@ dwarf2_frame_this_id (struct frame_info *this_frame, void **this_cache,
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struct dwarf2_frame_cache *cache =
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dwarf2_frame_cache (this_frame, this_cache);
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if (cache->unavailable_retaddr)
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return;
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if (cache->undefined_retaddr)
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return;
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@ -1321,6 +1358,7 @@ dwarf2_frame_sniffer (const struct frame_unwind *self,
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static const struct frame_unwind dwarf2_frame_unwind =
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{
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NORMAL_FRAME,
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dwarf2_frame_unwind_stop_reason,
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dwarf2_frame_this_id,
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dwarf2_frame_prev_register,
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NULL,
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@ -1330,6 +1368,7 @@ static const struct frame_unwind dwarf2_frame_unwind =
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static const struct frame_unwind dwarf2_signal_frame_unwind =
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{
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SIGTRAMP_FRAME,
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dwarf2_frame_unwind_stop_reason,
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dwarf2_frame_this_id,
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dwarf2_frame_prev_register,
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NULL,
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