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5f38f35d5d
Dropping the extra frame for unw_backtrace itself using unw_step is approximately 15% slower than skipping the frame in tdep_trace. So drop the frame in the latter, and make the function a private implementation detail for libunwind, not an exported interface. Also moves unw_getcontext call back into unw_backtrace to avoid an extra call frame in case slow_backtrace does not get inlined into unw_backtrace.
194 lines
6.7 KiB
C
194 lines
6.7 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2004 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#ifndef LIBUNWIND_H
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#define LIBUNWIND_H
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#include <inttypes.h>
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#include <ucontext.h>
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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#ifdef ia64
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/* This works around a bug in Intel's ECC v7.0 which defines "ia64"
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as "1". */
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# undef ia64
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#endif
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#ifdef __hpux
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/* On HP-UX, there is no hope of supporting UNW_LOCAL_ONLY, because
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it's impossible to obtain the address of the members in the
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sigcontext structure. */
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# undef UNW_LOCAL_ONLY
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# define UNW_GENERIC_ONLY
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#endif
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#define UNW_TARGET ia64
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#define UNW_TARGET_IA64 1
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#define _U_TDEP_QP_TRUE 0 /* see libunwind-dynamic.h */
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/* This needs to be big enough to accommodate "struct cursor", while
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leaving some slack for future expansion. Changing this value will
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require recompiling all users of this library. Stack allocation is
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relatively cheap and unwind-state copying is relatively rare, so we
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want to err on making it rather too big than too small. */
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#define UNW_TDEP_CURSOR_LEN 511
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/* If this bit is it indicates that the procedure saved all of ar.bsp,
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ar.bspstore, and ar.rnat. If, additionally, ar.bsp != saved ar.bsp,
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then this procedure has performed a register-backing-store switch. */
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#define UNW_PI_FLAG_IA64_RBS_SWITCH_BIT (UNW_PI_FLAG_FIRST_TDEP_BIT + 0)
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#define UNW_PI_FLAG_IA64_RBS_SWITCH (1 << UNW_PI_FLAG_IA64_RBS_SWITCH_BIT)
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typedef uint64_t unw_word_t;
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typedef int64_t unw_sword_t;
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/* On IA-64, we want to access the contents of floating-point
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registers as a pair of "words", but to ensure 16-byte alignment, we
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make it a union that contains a "long double". This will do the
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Right Thing on all known IA-64 platforms, including HP-UX. */
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typedef union
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{
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struct { unw_word_t bits[2]; } raw;
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long double dummy; /* dummy to force 16-byte alignment */
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}
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unw_tdep_fpreg_t;
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typedef struct
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{
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/* no ia64-specific auxiliary proc-info */
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}
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unw_tdep_proc_info_t;
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typedef enum
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{
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/* Note: general registers are excepted to start with index 0.
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This convention facilitates architecture-independent
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implementation of the C++ exception handling ABI. See
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_Unwind_SetGR() and _Unwind_GetGR() for details. */
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UNW_IA64_GR = 0, /* general registers (r0..r127) */
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UNW_IA64_GP = UNW_IA64_GR + 1,
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UNW_IA64_TP = UNW_IA64_GR + 13,
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UNW_IA64_NAT = UNW_IA64_GR + 128, /* NaT registers (nat0..nat127) */
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UNW_IA64_FR = UNW_IA64_NAT + 128, /* fp registers (f0..f127) */
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UNW_IA64_AR = UNW_IA64_FR + 128, /* application registers (ar0..r127) */
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UNW_IA64_AR_RSC = UNW_IA64_AR + 16,
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UNW_IA64_AR_BSP = UNW_IA64_AR + 17,
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UNW_IA64_AR_BSPSTORE = UNW_IA64_AR + 18,
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UNW_IA64_AR_RNAT = UNW_IA64_AR + 19,
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UNW_IA64_AR_CSD = UNW_IA64_AR + 25,
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UNW_IA64_AR_26 = UNW_IA64_AR + 26,
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UNW_IA64_AR_SSD = UNW_IA64_AR_26,
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UNW_IA64_AR_CCV = UNW_IA64_AR + 32,
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UNW_IA64_AR_UNAT = UNW_IA64_AR + 36,
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UNW_IA64_AR_FPSR = UNW_IA64_AR + 40,
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UNW_IA64_AR_PFS = UNW_IA64_AR + 64,
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UNW_IA64_AR_LC = UNW_IA64_AR + 65,
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UNW_IA64_AR_EC = UNW_IA64_AR + 66,
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UNW_IA64_BR = UNW_IA64_AR + 128, /* branch registers (b0..p7) */
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UNW_IA64_RP = UNW_IA64_BR + 0, /* return pointer (rp) */
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UNW_IA64_PR = UNW_IA64_BR + 8, /* predicate registers (p0..p63) */
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UNW_IA64_CFM,
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/* frame info: */
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UNW_IA64_BSP,
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UNW_IA64_IP,
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UNW_IA64_SP,
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UNW_TDEP_LAST_REG = UNW_IA64_SP,
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UNW_TDEP_IP = UNW_IA64_IP,
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UNW_TDEP_SP = UNW_IA64_SP,
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UNW_TDEP_EH = UNW_IA64_GR + 15
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}
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ia64_regnum_t;
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#define UNW_TDEP_NUM_EH_REGS 4 /* r15-r18 are exception args */
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typedef struct unw_tdep_save_loc
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{
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/* Additional target-dependent info on a save location. On IA-64,
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we use this to provide the bit number in which a NaT bit gets
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saved. */
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uint8_t nat_bitnr;
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/* Padding reserved for future use. */
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uint8_t reserved[7];
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}
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unw_tdep_save_loc_t;
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/* On IA-64, we can directly use ucontext_t as the unwind context. */
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typedef ucontext_t unw_tdep_context_t;
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#define unw_tdep_is_fpreg(r) ((unsigned) ((r) - UNW_IA64_FR) < 128)
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#include "libunwind-dynamic.h"
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#include "libunwind-common.h"
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#ifdef __hpux
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/* In theory, we could use _Uia64_getcontext() on HP-UX as well, but
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the benefit of doing so would be marginal given that it can't
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support UNW_LOCAL_ONLY. */
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# define unw_tdep_getcontext getcontext
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#else
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# define unw_tdep_getcontext UNW_ARCH_OBJ (getcontext)
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extern int unw_tdep_getcontext (unw_tdep_context_t *);
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#endif
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/* This is a helper routine to search an ia64 unwind table. If the
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address-space argument AS points to something other than the local
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address-space, the memory for the unwind-info will be allocated
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with malloc(), and should be free()d during the put_unwind_info()
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callback. This routine is signal-safe for the local-address-space
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case ONLY. */
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#define unw_search_ia64_unwind_table UNW_OBJ(search_unwind_table)
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extern int unw_search_ia64_unwind_table (unw_addr_space_t, unw_word_t,
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unw_dyn_info_t *, unw_proc_info_t *,
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int, void *);
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/* This is a helper routine which the get_dyn_info_list_addr()
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callback can use to locate the special dynamic-info list entry in
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an IA-64 unwind table. If the entry exists in the table, the
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list-address is returned. In all other cases, 0 is returned. */
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extern unw_word_t _Uia64_find_dyn_list (unw_addr_space_t, unw_dyn_info_t *,
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void *);
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/* This is a helper routine to obtain the kernel-unwind info. It is
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signal-safe. */
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extern int _Uia64_get_kernel_table (unw_dyn_info_t *);
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#if defined(__cplusplus) || defined(c_plusplus)
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}
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#endif
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#endif /* LIBUNWIND_H */
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