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Martinez via Gcc-patches" From: "Guillermo E. Martinez" Reply-To: "Guillermo E. Martinez" Cc: indu.bhagat@oracle.com, "Guillermo E. Martinez" Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1742531506171328821?= X-GMAIL-MSGID: =?utf-8?q?1746724637957746952?= Hello, The following is patch v3 to update BTF/CTF backend supporting BTF_KIND_ENUM64 type. Changes from v2: + Add a new `dtd_enum_unsigned' field in `ctf_dtdef' to indicate signedness of the enum type. + Fix endianness for representing BTF enum 64-bits enumerators. + Add {little,big}-endian testcases. Comments will be welcomed and appreciated!, Kind regards, guillermo --- BTF supports 64-bits enumerators with following encoding: struct btf_type: name_off: 0 or offset to a valid C identifier info.kind_flag: 0 for unsigned, 1 for signed info.kind: BTF_KIND_ENUM64 info.vlen: number of enum values size: 1/2/4/8 The btf_type is followed by info.vlen number of: struct btf_enum64 { uint32_t name_off; /* Offset in string section of enumerator name. */ uint32_t val_lo32; /* lower 32-bit value for a 64-bit value Enumerator */ uint32_t val_hi32; /* high 32-bit value for a 64-bit value Enumerator */ }; So, a new btf_enum64 structure was added to represent BTF_KIND_ENUM64 and a new field dtd_enum_unsigned in ctf_dtdef structure to distinguish when CTF enum is a signed or unsigned type, later that information is used to encode the BTF enum type. gcc/ChangeLog: * btfout.cc (btf_calc_num_vbytes): Compute enumeration size depending of enumerator type btf_enum{,64}. (btf_asm_type): Update btf_kflag according to enumeration type sign using dtd_enum_unsigned field for both: BTF_KIND_ENUM{,64}. (btf_asm_enum_const): New argument to represent the size of the BTF enum type, writing the enumerator constant value for 32 bits, if it's 64 bits then explicitly writes lower 32-bits value and higher 32-bits value. (output_asm_btf_enum_list): Add enumeration size argument. * ctfc.cc (ctf_add_enum): New argument to represent CTF enum basic information. (ctf_add_generic): Use of ei_{name. size, unsigned} to build the dtd structure containing enumeration information. (ctf_add_enumerator): Update comment mention support for BTF enumeration in 64-bits. * ctfc.h (ctf_dmdef): Update dmd_value to HOST_WIDE_INT to allow use 32/64 bits enumerators. (ctf_enum_binfo): New type to represent CTF basic enum type information. (ctf_dtdef): New field to describe enum signedness. * dwarf2ctf.cc (gen_ctf_enumeration_type): Use of ctf_enum_binfo type to pass information to ctf_add_enum to build the enum type. include/ * btf.h (btf_enum64): Add new definition and new symbolic constant to BTF_KIND_ENUM64 and BTF_KF_ENUM_{UN,}SIGNED. gcc/testsuite/ChangeLog: * gcc.dg/debug/btf/btf-enum-1.c: Update testcase, with correct info.kflags encoding. * gcc.dg/debug/btf/btf-enum64-be-1.c: New testcase. * gcc.dg/debug/btf/btf-enum64-le-1.c: New testcase. --- gcc/btfout.cc | 30 ++++++++++--- gcc/ctfc.cc | 22 +++++----- gcc/ctfc.h | 15 +++++-- gcc/dwarf2ctf.cc | 8 +++- gcc/testsuite/gcc.dg/debug/btf/btf-enum-1.c | 2 +- .../gcc.dg/debug/btf/btf-enum64-be-1.c | 44 +++++++++++++++++++ .../gcc.dg/debug/btf/btf-enum64-le-1.c | 44 +++++++++++++++++++ include/btf.h | 19 ++++++-- 8 files changed, 160 insertions(+), 24 deletions(-) create mode 100644 gcc/testsuite/gcc.dg/debug/btf/btf-enum64-be-1.c create mode 100644 gcc/testsuite/gcc.dg/debug/btf/btf-enum64-le-1.c diff --git a/gcc/btfout.cc b/gcc/btfout.cc index 997a33fa089..aef9fd70a28 100644 --- a/gcc/btfout.cc +++ b/gcc/btfout.cc @@ -223,7 +223,9 @@ btf_calc_num_vbytes (ctf_dtdef_ref dtd) break; case BTF_KIND_ENUM: - vlen_bytes += vlen * sizeof (struct btf_enum); + vlen_bytes += (dtd->dtd_data.ctti_size == 0x8) + ? vlen * sizeof (struct btf_enum64) + : vlen * sizeof (struct btf_enum); break; case BTF_KIND_FUNC_PROTO: @@ -622,6 +624,15 @@ btf_asm_type (ctf_container_ref ctfc, ctf_dtdef_ref dtd) btf_size_type = 0; } + if (btf_kind == BTF_KIND_ENUM) + { + btf_kflag = dtd->dtd_enum_unsigned + ? BTF_KF_ENUM_UNSIGNED + : BTF_KF_ENUM_SIGNED; + if (dtd->dtd_data.ctti_size == 0x8) + btf_kind = BTF_KIND_ENUM64; + } + dw2_asm_output_data (4, dtd->dtd_data.ctti_name, "btt_name"); dw2_asm_output_data (4, BTF_TYPE_INFO (btf_kind, btf_kflag, btf_vlen), "btt_info: kind=%u, kflag=%u, vlen=%u", @@ -634,6 +645,7 @@ btf_asm_type (ctf_container_ref ctfc, ctf_dtdef_ref dtd) case BTF_KIND_UNION: case BTF_KIND_ENUM: case BTF_KIND_DATASEC: + case BTF_KIND_ENUM64: dw2_asm_output_data (4, dtd->dtd_data.ctti_size, "btt_size: %uB", dtd->dtd_data.ctti_size); return; @@ -707,13 +719,19 @@ btf_asm_sou_member (ctf_container_ref ctfc, ctf_dmdef_t * dmd) } } -/* Asm'out an enum constant following a BTF_KIND_ENUM. */ +/* Asm'out an enum constant following a BTF_KIND_ENUM{,64}. */ static void -btf_asm_enum_const (ctf_dmdef_t * dmd) +btf_asm_enum_const (unsigned int size, ctf_dmdef_t * dmd) { dw2_asm_output_data (4, dmd->dmd_name_offset, "bte_name"); - dw2_asm_output_data (4, dmd->dmd_value, "bte_value"); + if (size == 4) + dw2_asm_output_data (size, dmd->dmd_value, "bte_value"); + else + { + dw2_asm_output_data (4, dmd->dmd_value & 0xffffffff, "bte_value_lo32"); + dw2_asm_output_data (4, (dmd->dmd_value >> 32) & 0xffffffff, "bte_value_hi32"); + } } /* Asm'out a function parameter description following a BTF_KIND_FUNC_PROTO. */ @@ -871,7 +889,7 @@ output_asm_btf_sou_fields (ctf_container_ref ctfc, ctf_dtdef_ref dtd) btf_asm_sou_member (ctfc, dmd); } -/* Output all enumerator constants following a BTF_KIND_ENUM. */ +/* Output all enumerator constants following a BTF_KIND_ENUM{,64}. */ static void output_asm_btf_enum_list (ctf_container_ref ARG_UNUSED (ctfc), @@ -881,7 +899,7 @@ output_asm_btf_enum_list (ctf_container_ref ARG_UNUSED (ctfc), for (dmd = dtd->dtd_u.dtu_members; dmd != NULL; dmd = (ctf_dmdef_t *) ctf_dmd_list_next (dmd)) - btf_asm_enum_const (dmd); + btf_asm_enum_const (dtd->dtd_data.ctti_size, dmd); } /* Output all function arguments following a BTF_KIND_FUNC_PROTO. */ diff --git a/gcc/ctfc.cc b/gcc/ctfc.cc index 9773358a475..80322eea91a 100644 --- a/gcc/ctfc.cc +++ b/gcc/ctfc.cc @@ -576,8 +576,8 @@ ctf_add_array (ctf_container_ref ctfc, uint32_t flag, const ctf_arinfo_t * arp, } ctf_id_t -ctf_add_enum (ctf_container_ref ctfc, uint32_t flag, const char * name, - HOST_WIDE_INT size, dw_die_ref die) +ctf_add_enum (ctf_container_ref ctfc, uint32_t flag, + const ctf_enum_binfo_t *ei, dw_die_ref die) { ctf_dtdef_ref dtd; ctf_id_t type; @@ -595,16 +595,16 @@ ctf_add_enum (ctf_container_ref ctfc, uint32_t flag, const char * name, = CTF_TYPE_INFO (CTF_K_FORWARD, CTF_ADD_NONROOT, 0); } - type = ctf_add_generic (ctfc, flag, name, &dtd, die); + type = ctf_add_generic (ctfc, flag, ei->ei_name, &dtd, die); dtd->dtd_data.ctti_info = CTF_TYPE_INFO (CTF_K_ENUM, flag, 0); /* Size in bytes should always fit, of course. TBD WARN - warn instead? */ - gcc_assert (size <= CTF_MAX_SIZE); - - dtd->dtd_data.ctti_size = size; + gcc_assert (ei->ei_size <= CTF_MAX_SIZE); + dtd->dtd_data.ctti_size = ei->ei_size; + dtd->dtd_enum_unsigned = ei->ei_unsigned; ctfc->ctfc_num_stypes++; return type; @@ -630,10 +630,12 @@ ctf_add_enumerator (ctf_container_ref ctfc, ctf_id_t enid, const char * name, gcc_assert (kind == CTF_K_ENUM && vlen < CTF_MAX_VLEN); - /* Enum value is of type HOST_WIDE_INT in the compiler, dmd_value is int32_t - on the other hand. Check bounds and skip adding this enum value if out of - bounds. */ - if ((value > INT_MAX) || (value < INT_MIN)) + /* Enum value is of type HOST_WIDE_INT in the compiler, CTF enumerators + values in ctf_enum_t is limited to int32_t, BTF supports signed and + unsigned enumerators values of 32 and 64 bits, for both debug formats + we use ctf_dmdef_t.dmd_value entry of HOST_WIDE_INT type. So check + CTF bounds and skip adding this enum value if out of bounds. */ + if (!btf_debuginfo_p() && ((value > INT_MAX) || (value < INT_MIN))) { /* FIXME - Note this TBD_CTF_REPRESENTATION_LIMIT. */ return (1); diff --git a/gcc/ctfc.h b/gcc/ctfc.h index bcf3a43ae1b..d3f50454385 100644 --- a/gcc/ctfc.h +++ b/gcc/ctfc.h @@ -125,6 +125,14 @@ typedef struct GTY (()) ctf_itype #define CTF_FUNC_VARARG 0x1 +/* Basic enum information to build ctf_dmdef_t type. */ +typedef struct ctf_enum_binfo +{ + const char * ei_name; + unsigned int ei_size; /* Size in bytes. */ + bool ei_unsigned; +} ctf_enum_binfo_t; + /* Struct/union/enum member definition for CTF generation. */ typedef struct GTY ((chain_next ("%h.dmd_next"))) ctf_dmdef @@ -133,7 +141,7 @@ typedef struct GTY ((chain_next ("%h.dmd_next"))) ctf_dmdef ctf_id_t dmd_type; /* Type of this member (for sou). */ uint32_t dmd_name_offset; /* Offset of the name in str table. */ uint64_t dmd_offset; /* Offset of this member in bits (for sou). */ - int dmd_value; /* Value of this member (for enum). */ + HOST_WIDE_INT dmd_value; /* Value of this member (for enum). */ struct ctf_dmdef * dmd_next; /* A list node. */ } ctf_dmdef_t; @@ -162,6 +170,7 @@ struct GTY ((for_user)) ctf_dtdef bool from_global_func; /* Whether this type was added from a global function. */ uint32_t linkage; /* Used in function types. 0=local, 1=global. */ + bool dtd_enum_unsigned; /* Enum signedness. */ union GTY ((desc ("ctf_dtu_d_union_selector (&%1)"))) { /* struct, union, or enum. */ @@ -405,8 +414,8 @@ extern const char * ctf_add_string (ctf_container_ref, const char *, extern ctf_id_t ctf_add_reftype (ctf_container_ref, uint32_t, ctf_id_t, uint32_t, dw_die_ref); -extern ctf_id_t ctf_add_enum (ctf_container_ref, uint32_t, const char *, - HOST_WIDE_INT, dw_die_ref); +extern ctf_id_t ctf_add_enum (ctf_container_ref, uint32_t, + const ctf_enum_binfo_t *, dw_die_ref); extern ctf_id_t ctf_add_slice (ctf_container_ref, uint32_t, ctf_id_t, uint32_t, uint32_t, dw_die_ref); extern ctf_id_t ctf_add_float (ctf_container_ref, uint32_t, const char *, diff --git a/gcc/dwarf2ctf.cc b/gcc/dwarf2ctf.cc index 397100004c2..56dfcadd3fb 100644 --- a/gcc/dwarf2ctf.cc +++ b/gcc/dwarf2ctf.cc @@ -736,6 +736,7 @@ gen_ctf_enumeration_type (ctf_container_ref ctfc, dw_die_ref enumeration) { const char *enum_name = get_AT_string (enumeration, DW_AT_name); unsigned int bit_size = ctf_die_bitsize (enumeration); + unsigned int signedness = get_AT_unsigned (enumeration, DW_AT_encoding); int declaration_p = get_AT_flag (enumeration, DW_AT_declaration); ctf_id_t enumeration_type_id; @@ -757,9 +758,14 @@ gen_ctf_enumeration_type (ctf_container_ref ctfc, dw_die_ref enumeration) bit_size = ctf_die_bitsize (type); } + ctf_enum_binfo_t ei; + ei.ei_name = enum_name; + ei.ei_size = bit_size / 8; + ei.ei_unsigned = (signedness == DW_ATE_unsigned); + /* Generate a CTF type for the enumeration. */ enumeration_type_id = ctf_add_enum (ctfc, CTF_ADD_ROOT, - enum_name, bit_size / 8, enumeration); + &ei, enumeration); /* Process the enumerators. */ { diff --git a/gcc/testsuite/gcc.dg/debug/btf/btf-enum-1.c b/gcc/testsuite/gcc.dg/debug/btf/btf-enum-1.c index 728493b0804..7e940529f1b 100644 --- a/gcc/testsuite/gcc.dg/debug/btf/btf-enum-1.c +++ b/gcc/testsuite/gcc.dg/debug/btf/btf-enum-1.c @@ -4,7 +4,7 @@ /* { dg-options "-O0 -gbtf -dA" } */ /* { dg-final { scan-assembler-times "\[\t \]0x6000004\[\t \]+\[^\n\]*btt_info" 1 } } */ -/* { dg-final { scan-assembler-times "\[\t \]0x6000003\[\t \]+\[^\n\]*btt_info" 1 } } */ +/* { dg-final { scan-assembler-times "\[\t \]0x86000003\[\t \]+\[^\n\]*btt_info" 1 } } */ /* { dg-final { scan-assembler-times "ascii \"QAD.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ /* { dg-final { scan-assembler-times "ascii \"QED.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ /* { dg-final { scan-assembler-times "ascii \"QOD.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ diff --git a/gcc/testsuite/gcc.dg/debug/btf/btf-enum64-be-1.c b/gcc/testsuite/gcc.dg/debug/btf/btf-enum64-be-1.c new file mode 100644 index 00000000000..40d44556e16 --- /dev/null +++ b/gcc/testsuite/gcc.dg/debug/btf/btf-enum64-be-1.c @@ -0,0 +1,44 @@ +/* Test BTF generation for 64 bits enums. */ + +/* { dg-do compile } */ +/* { dg-options "-O0 -gbtf -dA -mbig-endian" } */ + +/* { dg-final { scan-assembler-times "\[\t \].size\[\t \]myenum1,\[\t \]8" 1 } } */ +/* { dg-final { scan-assembler-times "\[\t \].size\[\t \]myenum2,\[\t \]8" 1 } } */ +/* { dg-final { scan-assembler-times "\[\t \].size\[\t \]myenum3,\[\t \]8" 1 } } */ +/* { dg-final { scan-assembler-times "\[\t \]0x13000003\[\t \]+\[^\n\]*btt_info" 2 } } */ +/* { dg-final { scan-assembler-times "\[\t \]0x93000003\[\t \]+\[^\n\]*btt_info" 1 } } */ +/* { dg-final { scan-assembler-times "\[\t \]0xffffffaa\[\t \]+\[^\n\]*bte_value_lo32" 2 } } */ +/* { dg-final { scan-assembler-times "\[\t \]0xff\[\t \]+\[^\n\]*bte_value_hi32" 3 } } */ +/* { dg-final { scan-assembler-times "ascii \"B1.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"B2.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"B3.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"C1.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"C2.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"C3.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"D1.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"D2.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"D3.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "bte_value_lo32" 9 } } */ +/* { dg-final { scan-assembler-times "bte_value_hi32" 9 } } */ + +enum default_enum +{ + B1 = 0xffffffffaa, + B2 = 0xbbbbbbbb, + B3 = 0xaabbccdd, +} myenum1 = B1; + +enum explicit_unsigned +{ + C1 = 0xffffffffbbUL, + C2 = 0xbbbbbbbb, + C3 = 0xaabbccdd, +} myenum2 = C1; + +enum signed64 +{ + D1 = 0xffffffffaa, + D2 = 0xbbbbbbbb, + D3 = -0x1, +} myenum3 = D1; diff --git a/gcc/testsuite/gcc.dg/debug/btf/btf-enum64-le-1.c b/gcc/testsuite/gcc.dg/debug/btf/btf-enum64-le-1.c new file mode 100644 index 00000000000..873a50ea174 --- /dev/null +++ b/gcc/testsuite/gcc.dg/debug/btf/btf-enum64-le-1.c @@ -0,0 +1,44 @@ +/* Test BTF generation for 64 bits enums. */ + +/* { dg-do compile } */ +/* { dg-options "-O0 -gbtf -dA -mlittle-endian" } */ + +/* { dg-final { scan-assembler-times "\[\t \].size\[\t \]myenum1,\[\t \]8" 1 } } */ +/* { dg-final { scan-assembler-times "\[\t \].size\[\t \]myenum2,\[\t \]8" 1 } } */ +/* { dg-final { scan-assembler-times "\[\t \].size\[\t \]myenum3,\[\t \]8" 1 } } */ +/* { dg-final { scan-assembler-times "\[\t \]0x13000003\[\t \]+\[^\n\]*btt_info" 2 } } */ +/* { dg-final { scan-assembler-times "\[\t \]0x93000003\[\t \]+\[^\n\]*btt_info" 1 } } */ +/* { dg-final { scan-assembler-times "\[\t \]0xffffffaa\[\t \]+\[^\n\]*bte_value_lo32" 2 } } */ +/* { dg-final { scan-assembler-times "\[\t \]0xff\[\t \]+\[^\n\]*bte_value_hi32" 3 } } */ +/* { dg-final { scan-assembler-times "ascii \"B1.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"B2.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"B3.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"C1.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"C2.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"C3.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"D1.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"D2.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "ascii \"D3.0\"\[\t \]+\[^\n\]*btf_string" 1 } } */ +/* { dg-final { scan-assembler-times "bte_value_lo32" 9 } } */ +/* { dg-final { scan-assembler-times "bte_value_hi32" 9 } } */ + +enum default_enum +{ + B1 = 0xffffffffaa, + B2 = 0xbbbbbbbb, + B3 = 0xaabbccdd, +} myenum1 = B1; + +enum explicit_unsigned +{ + C1 = 0xffffffffbbUL, + C2 = 0xbbbbbbbb, + C3 = 0xaabbccdd, +} myenum2 = C1; + +enum signed64 +{ + D1 = 0xffffffffaa, + D2 = 0xbbbbbbbb, + D3 = -0x1, +} myenum3 = D1; diff --git a/include/btf.h b/include/btf.h index 78b551ced23..eba67f9d599 100644 --- a/include/btf.h +++ b/include/btf.h @@ -109,7 +109,8 @@ struct btf_type #define BTF_KIND_VAR 14 /* Variable. */ #define BTF_KIND_DATASEC 15 /* Section such as .bss or .data. */ #define BTF_KIND_FLOAT 16 /* Floating point. */ -#define BTF_KIND_MAX BTF_KIND_FLOAT +#define BTF_KIND_ENUM64 19 /* Enumeration up to 64 bits. */ +#define BTF_KIND_MAX BTF_KIND_ENUM64 #define NR_BTF_KINDS (BTF_KIND_MAX + 1) /* For some BTF_KINDs, struct btf_type is immediately followed by @@ -130,14 +131,17 @@ struct btf_type #define BTF_INT_BOOL (1 << 2) /* BTF_KIND_ENUM is followed by VLEN struct btf_enum entries, - which describe the enumerators. Note that BTF currently only - supports signed 32-bit enumerator values. */ + which describe the enumerators. */ struct btf_enum { uint32_t name_off; /* Offset in string section of enumerator name. */ int32_t val; /* Enumerator value. */ }; +/* BTF_KF_ENUM_ holds the flags for kflags in BTF_KIND_ENUM{,64}. */ +#define BTF_KF_ENUM_UNSIGNED (0) +#define BTF_KF_ENUM_SIGNED (1 << 0) + /* BTF_KIND_ARRAY is followed by a single struct btf_array. */ struct btf_array { @@ -190,6 +194,15 @@ struct btf_var_secinfo uint32_t size; /* Size (in bytes) of variable. */ }; +/* BTF_KIND_ENUM64 is followed by VLEN struct btf_enum64 entries, + which describe the 64 bits enumerators. */ +struct btf_enum64 +{ + uint32_t name_off; /* Offset in string section of enumerator name. */ + uint32_t val_lo32; /* lower 32-bit value for a 64-bit value Enumerator */ + uint32_t val_hi32; /* high 32-bit value for a 64-bit value Enumerator */ +}; + #ifdef __cplusplus } #endif