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openSUSE:Step:15-SP2
gdb.21950
gdb-symtab-c-ify-call_site.patch
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File gdb-symtab-c-ify-call_site.patch of Package gdb.21950
[gdb/symtab] C++-ify call_site - add constructor - add member function call_site::pc () Tested on x86_64-linux. Co-Authored-By: Tom de Vries <tdevries@suse.de> --- gdb/dwarf2/frame-tailcall.c | 4 +-- gdb/dwarf2/loc.c | 18 ++++++------ gdb/dwarf2/read.c | 27 +++++++++--------- gdb/gdbtypes.c | 9 ++++++ gdb/gdbtypes.h | 67 +++++++++++++++++++++++++++++---------------- gdb/symtab.c | 3 +- 6 files changed, 77 insertions(+), 51 deletions(-) diff --git a/gdb/dwarf2/frame-tailcall.c b/gdb/dwarf2/frame-tailcall.c index f112b4ecca4..9fe498b0924 100644 --- a/gdb/dwarf2/frame-tailcall.c +++ b/gdb/dwarf2/frame-tailcall.c @@ -240,14 +240,14 @@ pretend_pc (struct frame_info *this_frame, struct tailcall_cache *cache) gdb_assert (next_levels >= 0); if (next_levels < chain->callees) - return chain->call_site[chain->length - next_levels - 1]->pc; + return chain->call_site[chain->length - next_levels - 1]->pc (); next_levels -= chain->callees; /* Otherwise CHAIN->CALLEES are already covered by CHAIN->CALLERS. */ if (chain->callees != chain->length) { if (next_levels < chain->callers) - return chain->call_site[chain->callers - next_levels - 1]->pc; + return chain->call_site[chain->callers - next_levels - 1]->pc (); next_levels -= chain->callers; } diff --git a/gdb/dwarf2/loc.c b/gdb/dwarf2/loc.c index d57cdc165ba..83b5fe1ac88 100644 --- a/gdb/dwarf2/loc.c +++ b/gdb/dwarf2/loc.c @@ -920,10 +920,10 @@ call_site_to_target_addr (struct gdbarch *call_site_gdbarch, { struct bound_minimal_symbol msym; - msym = lookup_minimal_symbol_by_pc (call_site->pc - 1); + msym = lookup_minimal_symbol_by_pc (call_site->pc () - 1); throw_error (NO_ENTRY_VALUE_ERROR, _("DW_AT_call_target is not specified at %s in %s"), - paddress (call_site_gdbarch, call_site->pc), + paddress (call_site_gdbarch, call_site->pc ()), (msym.minsym == NULL ? "???" : msym.minsym->print_name ())); @@ -932,12 +932,12 @@ call_site_to_target_addr (struct gdbarch *call_site_gdbarch, { struct bound_minimal_symbol msym; - msym = lookup_minimal_symbol_by_pc (call_site->pc - 1); + msym = lookup_minimal_symbol_by_pc (call_site->pc () - 1); throw_error (NO_ENTRY_VALUE_ERROR, _("DW_AT_call_target DWARF block resolving " "requires known frame which is currently not " "available at %s in %s"), - paddress (call_site_gdbarch, call_site->pc), + paddress (call_site_gdbarch, call_site->pc ()), (msym.minsym == NULL ? "???" : msym.minsym->print_name ())); @@ -966,11 +966,11 @@ call_site_to_target_addr (struct gdbarch *call_site_gdbarch, msym = lookup_minimal_symbol (physname, NULL, NULL); if (msym.minsym == NULL) { - msym = lookup_minimal_symbol_by_pc (call_site->pc - 1); + msym = lookup_minimal_symbol_by_pc (call_site->pc () - 1); throw_error (NO_ENTRY_VALUE_ERROR, _("Cannot find function \"%s\" for a call site target " "at %s in %s"), - physname, paddress (call_site_gdbarch, call_site->pc), + physname, paddress (call_site_gdbarch, call_site->pc ()), (msym.minsym == NULL ? "???" : msym.minsym->print_name ())); @@ -1076,7 +1076,7 @@ func_verify_no_selftailcall (struct gdbarch *gdbarch, CORE_ADDR verify_addr) static void tailcall_dump (struct gdbarch *gdbarch, const struct call_site *call_site) { - CORE_ADDR addr = call_site->pc; + CORE_ADDR addr = call_site->pc (); struct bound_minimal_symbol msym = lookup_minimal_symbol_by_pc (addr - 1); fprintf_unfiltered (gdb_stdlog, " %s(%s)", paddress (gdbarch, addr), @@ -1252,7 +1252,7 @@ call_site_find_chain_1 (struct gdbarch *gdbarch, CORE_ADDR caller_pc, if (target_call_site) { - if (addr_hash.insert (target_call_site->pc).second) + if (addr_hash.insert (target_call_site->pc ()).second) { /* Successfully entered TARGET_CALL_SITE. */ @@ -1271,7 +1271,7 @@ call_site_find_chain_1 (struct gdbarch *gdbarch, CORE_ADDR caller_pc, call_site = chain.back (); chain.pop_back (); - size_t removed = addr_hash.erase (call_site->pc); + size_t removed = addr_hash.erase (call_site->pc ()); gdb_assert (removed == 1); target_call_site = call_site->tail_call_next; diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c index 7def1e246c4..59ce3cf2b45 100644 --- a/gdb/dwarf2/read.c +++ b/gdb/dwarf2/read.c @@ -13287,7 +13287,6 @@ read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) struct gdbarch *gdbarch = objfile->arch (); CORE_ADDR pc, baseaddr; struct attribute *attr; - struct call_site *call_site, call_site_local; void **slot; int nparams; struct die_info *child_die; @@ -13312,10 +13311,11 @@ read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); if (cu->call_site_htab == NULL) - cu->call_site_htab = htab_create_alloc_ex (16, call_site_hash, call_site_eq, - NULL, &objfile->objfile_obstack, + cu->call_site_htab = htab_create_alloc_ex (16, call_site::hash, + call_site::eq, NULL, + &objfile->objfile_obstack, hashtab_obstack_allocate, NULL); - call_site_local.pc = pc; + struct call_site call_site_local (pc, nullptr, nullptr); slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); if (*slot != NULL) { @@ -13345,14 +13345,16 @@ read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) nparams++; } - call_site - = ((struct call_site *) - obstack_alloc (&objfile->objfile_obstack, - sizeof (*call_site) - + (sizeof (*call_site->parameter) * (nparams - 1)))); + struct call_site *call_site + = new (XOBNEWVAR (&objfile->objfile_obstack, + struct call_site, + sizeof (*call_site) + sizeof (call_site->parameter[0]) * nparams)) + struct call_site (pc, cu->per_cu, per_objfile); *slot = call_site; - memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); - call_site->pc = pc; + + /* We never call the destructor of call_site, so we must ensure it is + trivially destructible. */ + gdb_static_assert(std::is_trivially_destructible<struct call_site>::value); if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) @@ -13473,9 +13475,6 @@ read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) "block nor reference, for DIE %s [in module %s]"), sect_offset_str (die->sect_off), objfile_name (objfile)); - call_site->per_cu = cu->per_cu; - call_site->per_objfile = per_objfile; - for (child_die = die->child; child_die && child_die->tag; child_die = child_die->sibling) diff --git a/gdb/gdbtypes.c b/gdb/gdbtypes.c index 05ce646bc59..1b3ed1b32ed 100644 --- a/gdb/gdbtypes.c +++ b/gdb/gdbtypes.c @@ -37,6 +37,7 @@ #include "cp-support.h" #include "bcache.h" #include "dwarf2/loc.h" +#include "dwarf2/read.h" #include "gdbcore.h" #include "floatformat.h" #include "f-lang.h" @@ -6301,6 +6302,14 @@ objfile_type (struct objfile *objfile) return objfile_type; } +/* See gdbtypes.h. */ + +CORE_ADDR +call_site::pc () const +{ + return m_pc; +} + void _initialize_gdbtypes (); void _initialize_gdbtypes () diff --git a/gdb/gdbtypes.h b/gdb/gdbtypes.h index 77d1e66a6b1..a071188ffa1 100644 --- a/gdb/gdbtypes.h +++ b/gdb/gdbtypes.h @@ -1775,52 +1775,71 @@ struct call_site_parameter struct call_site { - /* Address of the first instruction after this call. */ - - CORE_ADDR pc; + call_site (CORE_ADDR pc, dwarf2_per_cu_data *per_cu, + dwarf2_per_objfile *per_objfile) + : per_cu (per_cu), per_objfile (per_objfile), m_pc (pc) + {} + + static int + eq (const call_site *a, const call_site *b) + { + return core_addr_eq (&a->m_pc, &b->m_pc); + } + + static hashval_t + hash (const call_site *a) + { + return core_addr_hash (&a->m_pc); + } + + static int + eq (const void *a, const void *b) + { + return eq ((const call_site *)a, (const call_site *)b); + } + + static hashval_t + hash (const void *a) + { + return hash ((const call_site *)a); + } + + /* Return the address of the first instruction after this call. */ + + CORE_ADDR pc () const; /* * List successor with head in FUNC_TYPE.TAIL_CALL_LIST. */ - struct call_site *tail_call_next; + struct call_site *tail_call_next = nullptr; /* * Describe DW_AT_call_target. Missing attribute uses FIELD_LOC_KIND_DWARF_BLOCK with FIELD_DWARF_BLOCK == NULL. */ - struct call_site_target target; + struct call_site_target target {}; /* * Size of the PARAMETER array. */ - unsigned parameter_count; + unsigned parameter_count = 0; /* * CU of the function where the call is located. It gets used for DWARF blocks execution in the parameter array below. */ - dwarf2_per_cu_data *per_cu; + dwarf2_per_cu_data *const per_cu = nullptr; /* objfile of the function where the call is located. */ - dwarf2_per_objfile *per_objfile; + dwarf2_per_objfile *const per_objfile = nullptr; + private: + /* Address of the first instruction after this call. */ + const CORE_ADDR m_pc; + + public: /* * Describe DW_TAG_call_site's DW_TAG_formal_parameter. */ - struct call_site_parameter parameter[1]; + struct call_site_parameter parameter[]; }; -static inline int -call_site_eq (const void *a_, const void *b_) -{ - const struct call_site *a = (const call_site *)a_; - const struct call_site *b = (const call_site *)b_; - return core_addr_eq (&a->pc, &b->pc); -} - -static inline hashval_t -call_site_hash (const void *a_) -{ - const struct call_site *a = (const call_site *)a_; - return core_addr_hash (&a->pc); -} - /* The type-specific info for TYPE_CODE_FIXED_POINT types. */ struct fixed_point_type_info diff --git a/gdb/symtab.c b/gdb/symtab.c index fe430edadb2..14cc2b5bd8d 100644 --- a/gdb/symtab.c +++ b/gdb/symtab.c @@ -334,11 +334,10 @@ search_domain_name (enum search_domain e) call_site * compunit_symtab::find_call_site (CORE_ADDR pc) const { - struct call_site call_site_local; if (m_call_site_htab == nullptr) return nullptr; - call_site_local.pc = pc; + struct call_site call_site_local (pc, nullptr, nullptr); void **slot = htab_find_slot (m_call_site_htab, &call_site_local, NO_INSERT); if (slot == nullptr)
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