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dwarf3-unwind.patch
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File dwarf3-unwind.patch of Package gcc41
2006-03-04 Jakub Jelinek <jakub@redhat.com> * unwind-dw2.h (_Unwind_FrameState): Add REG_SAVED_VAL_OFFSET and REG_SAVED_VAL_EXP constants. * unwind-dw2.c (struct _Unwind_Context): Add by_value array. (_Unwind_GetGR, _Unwind_SetGR, _Unwind_GetGRPtr, _Unwind_SetGRPtr): Handle regs stored by value. (_Unwind_SetGRValue, _Unwind_GRByValue): New functions. (execute_cfa_program): Handle DW_CFA_val_offset, DW_CFA_val_offset_sf and DW_CFA_val_expression. (uw_update_context_1): Handle REG_SAVED_REG with regs stored by value specially. Handle REG_SAVED_VAL_OFFSET and REG_SAVED_VAL_EXP. (uw_install_context_1): Handle target regs stored by value. 2006-03-04 Jakub Jelinek <jakub@redhat.com> * gcc.target/i386/cleanup-1.c: New test. * gcc.target/i386/cleanup-2.c: New test. Index: gcc/unwind-dw2.c =================================================================== --- gcc/unwind-dw2.c.orig +++ gcc/unwind-dw2.c @@ -72,6 +72,7 @@ struct _Unwind_Context struct dwarf_eh_bases bases; _Unwind_Word args_size; char signal_frame; + char by_value[DWARF_FRAME_REGISTERS+1]; }; /* Byte size of every register managed by these routines. */ @@ -118,7 +119,7 @@ read_8u (const void *p) { const union un static inline unsigned long read_8s (const void *p) { const union unaligned *up = p; return up->s8; } -/* Get the value of register REG as saved in CONTEXT. */ +/* Get the value of register INDEX as saved in CONTEXT. */ inline _Unwind_Word _Unwind_GetGR (struct _Unwind_Context *context, int index) @@ -136,6 +137,9 @@ _Unwind_GetGR (struct _Unwind_Context *c size = dwarf_reg_size_table[index]; ptr = context->reg[index]; + if (context->by_value[index]) + return (_Unwind_Word) (_Unwind_Internal_Ptr) ptr; + /* This will segfault if the register hasn't been saved. */ if (size == sizeof(_Unwind_Ptr)) return * (_Unwind_Ptr *) ptr; @@ -160,7 +164,7 @@ _Unwind_GetCFA (struct _Unwind_Context * return (_Unwind_Ptr) context->cfa; } -/* Overwrite the saved value for register REG in CONTEXT with VAL. */ +/* Overwrite the saved value for register INDEX in CONTEXT with VAL. */ inline void _Unwind_SetGR (struct _Unwind_Context *context, int index, _Unwind_Word val) @@ -171,6 +175,13 @@ _Unwind_SetGR (struct _Unwind_Context *c index = DWARF_REG_TO_UNWIND_COLUMN (index); gcc_assert (index < (int) sizeof(dwarf_reg_size_table)); size = dwarf_reg_size_table[index]; + + if (context->by_value[index]) + { + context->reg[index] = (void *) (_Unwind_Internal_Ptr) val; + return; + } + ptr = context->reg[index]; if (size == sizeof(_Unwind_Ptr)) @@ -188,6 +199,8 @@ static inline void * _Unwind_GetGRPtr (struct _Unwind_Context *context, int index) { index = DWARF_REG_TO_UNWIND_COLUMN (index); + if (context->by_value[index]) + return &context->reg[index]; return context->reg[index]; } @@ -197,9 +210,34 @@ static inline void _Unwind_SetGRPtr (struct _Unwind_Context *context, int index, void *p) { index = DWARF_REG_TO_UNWIND_COLUMN (index); + context->by_value[index] = 0; context->reg[index] = p; } +/* Overwrite the saved value for register INDEX in CONTEXT with VAL. */ + +static inline void +_Unwind_SetGRValue (struct _Unwind_Context *context, int index, + _Unwind_Word val) +{ + index = DWARF_REG_TO_UNWIND_COLUMN (index); + gcc_assert (index < (int) sizeof(dwarf_reg_size_table)); + gcc_assert (dwarf_reg_size_table[index] == sizeof (_Unwind_Ptr)); + + context->by_value[index] = 1; + context->reg[index] = (void *) (_Unwind_Internal_Ptr) val; +} + +/* Return non-zero if register INDEX is stored by value rather than + by reference. */ + +static inline int +_Unwind_GRByValue (struct _Unwind_Context *context, int index) +{ + index = DWARF_REG_TO_UNWIND_COLUMN (index); + return context->by_value[index]; +} + /* Retrieve the return address for CONTEXT. */ inline _Unwind_Ptr @@ -922,7 +960,7 @@ execute_cfa_program (const unsigned char insn_ptr += utmp; break; - /* From the dwarf3 draft. */ + /* Dwarf3. */ case DW_CFA_offset_extended_sf: insn_ptr = read_uleb128 (insn_ptr, ®); insn_ptr = read_sleb128 (insn_ptr, &stmp); @@ -945,6 +983,33 @@ execute_cfa_program (const unsigned char /* cfa_how deliberately not set. */ break; + case DW_CFA_val_offset: + insn_ptr = read_uleb128 (insn_ptr, ®); + insn_ptr = read_uleb128 (insn_ptr, &utmp); + offset = (_Unwind_Sword) utmp * fs->data_align; + fs->regs.reg[DWARF_REG_TO_UNWIND_COLUMN (reg)].how + = REG_SAVED_VAL_OFFSET; + fs->regs.reg[DWARF_REG_TO_UNWIND_COLUMN (reg)].loc.offset = offset; + break; + + case DW_CFA_val_offset_sf: + insn_ptr = read_uleb128 (insn_ptr, ®); + insn_ptr = read_sleb128 (insn_ptr, &stmp); + offset = stmp * fs->data_align; + fs->regs.reg[DWARF_REG_TO_UNWIND_COLUMN (reg)].how + = REG_SAVED_VAL_OFFSET; + fs->regs.reg[DWARF_REG_TO_UNWIND_COLUMN (reg)].loc.offset = offset; + break; + + case DW_CFA_val_expression: + insn_ptr = read_uleb128 (insn_ptr, ®); + fs->regs.reg[DWARF_REG_TO_UNWIND_COLUMN (reg)].how + = REG_SAVED_VAL_EXP; + fs->regs.reg[DWARF_REG_TO_UNWIND_COLUMN (reg)].loc.exp = insn_ptr; + insn_ptr = read_uleb128 (insn_ptr, &utmp); + insn_ptr += utmp; + break; + case DW_CFA_GNU_window_save: /* ??? Hardcoded for SPARC register window configuration. */ for (reg = 16; reg < 32; ++reg) @@ -1113,7 +1178,7 @@ typedef union { _Unwind_Ptr ptr; _Unwind static inline void _Unwind_SetSpColumn (struct _Unwind_Context *context, void *cfa, - _Unwind_SpTmp *tmp_sp) + _Unwind_SpTmp *tmp_sp) { int size = dwarf_reg_size_table[__builtin_dwarf_sp_column ()]; @@ -1194,9 +1259,14 @@ uw_update_context_1 (struct _Unwind_Cont break; case REG_SAVED_REG: - _Unwind_SetGRPtr - (context, i, - _Unwind_GetGRPtr (&orig_context, fs->regs.reg[i].loc.reg)); + if (_Unwind_GRByValue (&orig_context, fs->regs.reg[i].loc.reg)) + _Unwind_SetGRValue (context, i, + _Unwind_GetGR (&orig_context, + fs->regs.reg[i].loc.reg)); + else + _Unwind_SetGRPtr (context, i, + _Unwind_GetGRPtr (&orig_context, + fs->regs.reg[i].loc.reg)); break; case REG_SAVED_EXP: @@ -1211,6 +1281,25 @@ uw_update_context_1 (struct _Unwind_Cont _Unwind_SetGRPtr (context, i, (void *) val); } break; + + case REG_SAVED_VAL_OFFSET: + _Unwind_SetGRValue (context, i, + (_Unwind_Internal_Ptr) + (cfa + fs->regs.reg[i].loc.offset)); + break; + + case REG_SAVED_VAL_EXP: + { + const unsigned char *exp = fs->regs.reg[i].loc.exp; + _Unwind_Word len; + _Unwind_Ptr val; + + exp = read_uleb128 (exp, &len); + val = execute_stack_op (exp, exp + len, &orig_context, + (_Unwind_Ptr) cfa); + _Unwind_SetGRValue (context, i, val); + } + break; } context->signal_frame = fs->signal_frame; @@ -1327,14 +1416,31 @@ uw_install_context_1 (struct _Unwind_Con /* If the target frame does not have a saved stack pointer, then set up the target's CFA. */ if (!_Unwind_GetGRPtr (target, __builtin_dwarf_sp_column ())) - _Unwind_SetSpColumn (target, target->cfa, &sp_slot); + _Unwind_SetSpColumn (target, target->cfa, &sp_slot); for (i = 0; i < DWARF_FRAME_REGISTERS; ++i) { void *c = current->reg[i]; void *t = target->reg[i]; - if (t && c && t != c) + gcc_assert (current->by_value[i] == 0); + if (target->by_value[i] && c) + { + _Unwind_Word w; + _Unwind_Ptr p; + if (dwarf_reg_size_table[i] == sizeof (_Unwind_Word)) + { + w = (_Unwind_Internal_Ptr) t; + memcpy (c, &w, sizeof (_Unwind_Word)); + } + else + { + gcc_assert (dwarf_reg_size_table[i] == sizeof (_Unwind_Ptr)); + p = (_Unwind_Internal_Ptr) t; + memcpy (c, &p, sizeof (_Unwind_Ptr)); + } + } + else if (t && c && t != c) memcpy (c, t, dwarf_reg_size_table[i]); } Index: gcc/unwind-dw2.h =================================================================== --- gcc/unwind-dw2.h.orig +++ gcc/unwind-dw2.h @@ -53,7 +53,9 @@ typedef struct REG_UNSAVED, REG_SAVED_OFFSET, REG_SAVED_REG, - REG_SAVED_EXP + REG_SAVED_EXP, + REG_SAVED_VAL_OFFSET, + REG_SAVED_VAL_EXP } how; } reg[DWARF_FRAME_REGISTERS+1]; Index: gcc/testsuite/gcc.target/i386/cleanup-1.c =================================================================== --- /dev/null +++ gcc/testsuite/gcc.target/i386/cleanup-1.c @@ -0,0 +1,240 @@ +/* { dg-do run { target i?86-*-linux* x86_64-*-linux* } } */ +/* { dg-options "-fexceptions -fnon-call-exceptions -fasynchronous-unwind-tables -O2" } */ +/* Test complex CFA value expressions. */ + +#include <unwind.h> +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <unistd.h> + +static _Unwind_Reason_Code +force_unwind_stop (int version, _Unwind_Action actions, + _Unwind_Exception_Class exc_class, + struct _Unwind_Exception *exc_obj, + struct _Unwind_Context *context, + void *stop_parameter) +{ + if (actions & _UA_END_OF_STACK) + abort (); + return _URC_NO_REASON; +} + +static void +force_unwind () +{ + struct _Unwind_Exception *exc = malloc (sizeof (*exc)); + memset (&exc->exception_class, 0, sizeof (exc->exception_class)); + exc->exception_cleanup = 0; + + _Unwind_ForcedUnwind (exc, force_unwind_stop, 0); + abort (); +} + +int count; + +static void +counter (void *p __attribute__((unused))) +{ + ++count; +} + +static void +handler (void *p __attribute__((unused))) +{ + if (count != 2) + abort (); + _exit (0); +} + +static int __attribute__((noinline)) +fn5 (void) +{ + char dummy __attribute__((cleanup (counter))); + force_unwind (); + return 0; +} + +void +bar (void) +{ + char dummy __attribute__((cleanup (counter))); + fn5 (); +} + +void __attribute__((noinline)) +foo (int x) +{ + char buf[256]; +#ifdef __i386__ + __asm ( + "testl %0, %0\n\t" + "jnz 1f\n\t" + ".subsection 1\n\t" + ".type _L_mutex_lock_%=, @function\n" +"_L_mutex_lock_%=:\n" +"1:\t" "leal %1, %%ecx\n" +"2:\t" "call bar\n" +"3:\t" "jmp 18f\n" +"4:\t" ".size _L_mutex_lock_%=, .-_L_mutex_lock_%=\n\t" + ".previous\n\t" + ".section .eh_frame,\"a\",@progbits\n" +"5:\t" ".long 7f-6f # Length of Common Information Entry\n" +"6:\t" ".long 0x0 # CIE Identifier Tag\n\t" + ".byte 0x1 # CIE Version\n\t" + ".ascii \"zR\\0\" # CIE Augmentation\n\t" + ".uleb128 0x1 # CIE Code Alignment Factor\n\t" + ".sleb128 -4 # CIE Data Alignment Factor\n\t" + ".byte 0x8 # CIE RA Column\n\t" + ".uleb128 0x1 # Augmentation size\n\t" + ".byte 0x1b # FDE Encoding (pcrel sdata4)\n\t" + ".byte 0xc # DW_CFA_def_cfa\n\t" + ".uleb128 0x4\n\t" + ".uleb128 0x0\n\t" + ".align 4\n" +"7:\t" ".long 17f-8f # FDE Length\n" +"8:\t" ".long 8b-5b # FDE CIE offset\n\t" + ".long 1b-. # FDE initial location\n\t" + ".long 4b-1b # FDE address range\n\t" + ".uleb128 0x0 # Augmentation size\n\t" + ".byte 0x16 # DW_CFA_val_expression\n\t" + ".uleb128 0x8\n\t" + ".uleb128 10f-9f\n" +"9:\t" ".byte 0x78 # DW_OP_breg8\n\t" + ".sleb128 3b-1b\n" +"10:\t" ".byte 0x40 + (2b-1b) # DW_CFA_advance_loc\n\t" + ".byte 0x16 # DW_CFA_val_expression\n\t" + ".uleb128 0x8\n\t" + ".uleb128 12f-11f\n" +"11:\t" ".byte 0x78 # DW_OP_breg8\n\t" + ".sleb128 3b-2b\n" +"12:\t" ".byte 0x40 + (3b-2b-1) # DW_CFA_advance_loc\n\t" + ".byte 0x16 # DW_CFA_val_expression\n\t" + ".uleb128 0x8\n\t" + ".uleb128 16f-13f\n" +"13:\t" ".byte 0x78 # DW_OP_breg8\n\t" + ".sleb128 15f-14f\n\t" + ".byte 0x0d # DW_OP_const4s\n" +"14:\t" ".4byte 3b-.\n\t" + ".byte 0x1c # DW_OP_minus\n\t" + ".byte 0x0d # DW_OP_const4s\n" +"15:\t" ".4byte 18f-.\n\t" + ".byte 0x22 # DW_OP_plus\n" +"16:\t" ".align 4\n" +"17:\t" ".previous\n" +"18:" + : : "r" (x), "m" (x), "r" (buf) + : "memory", "eax", "edx", "ecx"); +#elif defined __x86_64__ + __asm ( + "testl %0, %0\n\t" + "jnz 1f\n\t" + ".subsection 1\n\t" + ".type _L_mutex_lock_%=, @function\n" +"_L_mutex_lock_%=:\n" +"1:\t" "leaq %1, %%rdi\n" +"2:\t" "subq $128, %%rsp\n" +"3:\t" "call bar\n" +"4:\t" "addq $128, %%rsp\n" +"5:\t" "jmp 24f\n" +"6:\t" ".size _L_mutex_lock_%=, .-_L_mutex_lock_%=\n\t" + ".previous\n\t" + ".section .eh_frame,\"a\",@progbits\n" +"7:\t" ".long 9f-8f # Length of Common Information Entry\n" +"8:\t" ".long 0x0 # CIE Identifier Tag\n\t" + ".byte 0x1 # CIE Version\n\t" + ".ascii \"zR\\0\" # CIE Augmentation\n\t" + ".uleb128 0x1 # CIE Code Alignment Factor\n\t" + ".sleb128 -8 # CIE Data Alignment Factor\n\t" + ".byte 0x10 # CIE RA Column\n\t" + ".uleb128 0x1 # Augmentation size\n\t" + ".byte 0x1b # FDE Encoding (pcrel sdata4)\n\t" + ".byte 0x12 # DW_CFA_def_cfa_sf\n\t" + ".uleb128 0x7\n\t" + ".sleb128 16\n\t" + ".align 8\n" +"9:\t" ".long 23f-10f # FDE Length\n" +"10:\t" ".long 10b-7b # FDE CIE offset\n\t" + ".long 1b-. # FDE initial location\n\t" + ".long 6b-1b # FDE address range\n\t" + ".uleb128 0x0 # Augmentation size\n\t" + ".byte 0x16 # DW_CFA_val_expression\n\t" + ".uleb128 0x10\n\t" + ".uleb128 12f-11f\n" +"11:\t" ".byte 0x80 # DW_OP_breg16\n\t" + ".sleb128 4b-1b\n" +"12:\t" ".byte 0x40 + (2b-1b) # DW_CFA_advance_loc\n\t" + ".byte 0x16 # DW_CFA_val_expression\n\t" + ".uleb128 0x10\n\t" + ".uleb128 14f-13f\n" +"13:\t" ".byte 0x80 # DW_OP_breg16\n\t" + ".sleb128 4b-2b\n" +"14:\t" ".byte 0x40 + (3b-2b) # DW_CFA_advance_loc\n\t" + ".byte 0x0e # DW_CFA_def_cfa_offset\n\t" + ".uleb128 0\n\t" + ".byte 0x16 # DW_CFA_val_expression\n\t" + ".uleb128 0x10\n\t" + ".uleb128 16f-15f\n" +"15:\t" ".byte 0x80 # DW_OP_breg16\n\t" + ".sleb128 4b-3b\n" +"16:\t" ".byte 0x40 + (4b-3b-1) # DW_CFA_advance_loc\n\t" + ".byte 0x0e # DW_CFA_def_cfa_offset\n\t" + ".uleb128 128\n\t" + ".byte 0x16 # DW_CFA_val_expression\n\t" + ".uleb128 0x10\n\t" + ".uleb128 20f-17f\n" +"17:\t" ".byte 0x80 # DW_OP_breg16\n\t" + ".sleb128 19f-18f\n\t" + ".byte 0x0d # DW_OP_const4s\n" +"18:\t" ".4byte 4b-.\n\t" + ".byte 0x1c # DW_OP_minus\n\t" + ".byte 0x0d # DW_OP_const4s\n" +"19:\t" ".4byte 24f-.\n\t" + ".byte 0x22 # DW_OP_plus\n" +"20:\t" ".byte 0x40 + (5b-4b+1) # DW_CFA_advance_loc\n\t" + ".byte 0x13 # DW_CFA_def_cfa_offset_sf\n\t" + ".sleb128 16\n\t" + ".byte 0x16 # DW_CFA_val_expression\n\t" + ".uleb128 0x10\n\t" + ".uleb128 22f-21f\n" +"21:\t" ".byte 0x80 # DW_OP_breg16\n\t" + ".sleb128 4b-5b\n" +"22:\t" ".align 8\n" +"23:\t" ".previous\n" +"24:" + : : "r" (x), "m" (x), "r" (buf) + : "memory", "rax", "rdx", "rcx", "rsi", "rdi", + "r8", "r9", "r10", "r11"); +#else +# error Unsupported test architecture +#endif +} + +static int __attribute__((noinline)) +fn2 (void) +{ + foo (3); + return 0; +} + +static int __attribute__((noinline)) +fn1 (void) +{ + fn2 (); + return 0; +} + +static void * +fn0 (void) +{ + char dummy __attribute__((cleanup (handler))); + fn1 (); + return 0; +} + +int +main (void) +{ + fn0 (); + return 0; +} Index: gcc/testsuite/gcc.target/i386/cleanup-2.c =================================================================== --- /dev/null +++ gcc/testsuite/gcc.target/i386/cleanup-2.c @@ -0,0 +1,205 @@ +/* { dg-do run { target { { i?86-*-linux* x86_64-*-linux* } && lp64 } } } */ +/* { dg-options "-fexceptions -fnon-call-exceptions -fasynchronous-unwind-tables -O2" } */ +/* Test complex CFA value expressions. */ + +#include <unwind.h> +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <unistd.h> + +static _Unwind_Reason_Code +force_unwind_stop (int version, _Unwind_Action actions, + _Unwind_Exception_Class exc_class, + struct _Unwind_Exception *exc_obj, + struct _Unwind_Context *context, + void *stop_parameter) +{ + if (actions & _UA_END_OF_STACK) + abort (); + return _URC_NO_REASON; +} + +static void +force_unwind () +{ + struct _Unwind_Exception *exc = malloc (sizeof (*exc)); + memset (&exc->exception_class, 0, sizeof (exc->exception_class)); + exc->exception_cleanup = 0; + + _Unwind_ForcedUnwind (exc, force_unwind_stop, 0); + abort (); +} + +int count; + +static void +counter (void *p __attribute__((unused))) +{ + ++count; +} + +static void +handler (void *p __attribute__((unused))) +{ + if (count != 2) + abort (); + _exit (0); +} + +static int __attribute__((noinline)) +fn5 (void) +{ + char dummy __attribute__((cleanup (counter))); + force_unwind (); + return 0; +} + +void +bar (void) +{ + char dummy __attribute__((cleanup (counter))); + fn5 (); +} + +void __attribute__((noinline)) +foo (int x) +{ + char buf[256]; +#ifdef __x86_64__ + __asm ( + "testl %0, %0\n\t" + "jnz 1f\n\t" + ".subsection 1\n\t" + ".type _L_mutex_lock_%=, @function\n" +"_L_mutex_lock_%=:\n" +"1:\t" "leaq %1, %%rdi\n" +"2:\t" "subq $128, %%rsp\n" +"3:\t" "call bar\n" +"4:\t" "addq $128, %%rsp\n" +"5:\t" "jmp 21f\n" +"6:\t" ".size _L_mutex_lock_%=, .-_L_mutex_lock_%=\n\t" + ".previous\n\t" + ".section .eh_frame,\"a\",@progbits\n" +"7:\t" ".long 9f-8f # Length of Common Information Entry\n" +"8:\t" ".long 0x0 # CIE Identifier Tag\n\t" + ".byte 0x1 # CIE Version\n\t" + ".ascii \"zR\\0\" # CIE Augmentation\n\t" + ".uleb128 0x1 # CIE Code Alignment Factor\n\t" + ".sleb128 -8 # CIE Data Alignment Factor\n\t" + ".byte 0x10 # CIE RA Column\n\t" + ".uleb128 0x1 # Augmentation size\n\t" + ".byte 0x1b # FDE Encoding (pcrel sdata4)\n\t" + ".byte 0xc # DW_CFA_def_cfa\n\t" + ".uleb128 0x7\n\t" + ".uleb128 0x0\n\t" + ".align 8\n" +"9:\t" ".long 20f-10f # FDE Length\n" +"10:\t" ".long 10b-7b # FDE CIE offset\n\t" + ".long 1b-. # FDE initial location\n\t" + ".long 6b-1b # FDE address range\n\t" + ".uleb128 0x0 # Augmentation size\n\t" + /* This CFA expression computes the address right + past the jnz instruction above, from %rip somewhere + within the _L_mutex_lock_%= subsection. */ + ".byte 0x16 # DW_CFA_val_expression\n\t" + ".uleb128 0x10\n\t" + ".uleb128 19f-11f\n" +"11:\t" ".byte 0x80 # DW_OP_breg16\n\t" + ".sleb128 0\n" +"12:\t" ".byte 0x12 # DW_OP_dup\n\t" + ".byte 0x94 # DW_OP_deref_size\n\t" + ".byte 1\n\t" + ".byte 0x12 # DW_OP_dup\n\t" + ".byte 0x08 # DW_OP_const1u\n\t" + ".byte 0x48\n\t" + ".byte 0x2e # DW_OP_ne\n\t" + ".byte 0x28 # DW_OP_bra\n\t" + ".2byte 16f-13f\n" +"13:\t" ".byte 0x13 # DW_OP_drop\n\t" + ".byte 0x23 # DW_OP_plus_uconst\n\t" + ".uleb128 1\n\t" + ".byte 0x12 # DW_OP_dup\n\t" + ".byte 0x94 # DW_OP_deref_size\n\t" + ".byte 1\n\t" + ".byte 0x08 # DW_OP_const1u\n\t" + ".byte 0x81\n\t" + ".byte 0x2e # DW_OP_ne\n\t" + ".byte 0x28 # DW_OP_bra\n\t" + ".2byte 15f-14f\n" +"14:\t" ".byte 0x23 # DW_OP_plus_uconst\n\t" + ".uleb128 3b-2b-1\n\t" + ".byte 0x2f # DW_OP_skip\n\t" + ".2byte 12b-15f\n" +"15:\t" ".byte 0x23 # DW_OP_plus_uconst\n\t" + ".uleb128 2b-1b-1\n\t" + ".byte 0x2f # DW_OP_skip\n\t" + ".2byte 12b-16f\n" +"16:\t" ".byte 0x08 # DW_OP_const1u\n\t" + ".byte 0xe8\n\t" + ".byte 0x2e # DW_OP_ne\n\t" + ".byte 0x28 # DW_OP_bra\n\t" + ".2byte 18f-17f\n" +"17:\t" ".byte 0x23 # DW_OP_plus_uconst\n\t" + ".uleb128 4b-3b\n\t" + ".byte 0x2f # DW_OP_skip\n\t" + ".2byte 12b-18f\n" +"18:\t" ".byte 0x23 # DW_OP_plus_uconst\n\t" + ".uleb128 1\n\t" + ".byte 0x12 # DW_OP_dup\n\t" + ".byte 0x94 # DW_OP_deref_size\n\t" + ".byte 4\n\t" + ".byte 0x08 # DW_OP_const1u\n\t" + ".byte 72 - (6b-5b) * 8 # (6b-5b) == 5 ? 32 : 56\n\t" + ".byte 0x24 # DW_OP_shl\n\t" + ".byte 0x08 # DW_OP_const1u\n\t" + ".byte 72 - (6b-5b) * 8 # (6b-5b) == 5 ? 32 : 56\n\t" + ".byte 0x26 # DW_OP_shra\n\t" + ".byte 0x22 # DW_OP_plus\n\t" + ".byte 0x23 # DW_OP_plus_uconst\n\t" + ".uleb128 6b-5b-1\n" +"19:\t" ".byte 0x40 + (3b-1b) # DW_CFA_advance_loc\n\t" + ".byte 0xe # DW_CFA_def_cfa_offset\n\t" + ".uleb128 128\n\t" + ".byte 0x40 + (5b-3b) # DW_CFA_advance_loc\n\t" + ".byte 0xe # DW_CFA_def_cfa_offset\n\t" + ".uleb128 0\n\t" + ".align 8\n" +"20:\t" ".previous\n" +"21:" + : : "r" (x), "m" (x), "r" (buf) + : "memory", "rax", "rdx", "rcx", "rsi", "rdi", + "r8", "r9", "r10", "r11"); +#else +# error Unsupported test architecture +#endif +} + +static int __attribute__((noinline)) +fn2 (void) +{ + foo (3); + return 0; +} + +static int __attribute__((noinline)) +fn1 (void) +{ + fn2 (); + return 0; +} + +static void * +fn0 (void) +{ + char dummy __attribute__((cleanup (handler))); + fn1 (); + return 0; +} + +int +main (void) +{ + fn0 (); + return 0; +}
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