re PR rtl-optimization/34999 (Incorrect FDE entries with hot/cold code section splitting (partition_hot_cold_basic_blocks))
PR rtl-optimization/34999 * dwarf2out.c (struct dw_fde_struct): Add dw_fde_switch_cfi and dw_fde_switched_cold_to_hot fields. (output_cfi_p): New function. (output_call_frame_info): If fde->dw_fde_switched_sections, output 2 FDEs instead of one with corrupted header. (dwarf2out_do_cfi_startproc): New function. (dwarf2out_begin_prologue): Use it. Initialize fde->dw_fde_switch_cfi and fde->dw_fde_switched_cold_to_hot. (dwarf2out_switch_text_section): Compute fde->dw_fde_switched_cold_to_hot. Switch to new text section here. If dwarf2out_do_cfi_asm, emit .cfi_endproc before it and call dwarf2out_do_cfi_startproc plus emit again currently active CFI insns. Otherwise, compute fde->dw_fde_switch_cfi. From-SVN: r150069
This commit is contained in:
Jakub Jelinek
Jakub Jelinek
parent
2a2869d6c5
commit
0cf856b728
@ -1,3 +1,20 @@
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2009-07-25 Jakub Jelinek <jakub@redhat.com>
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PR rtl-optimization/34999
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* dwarf2out.c (struct dw_fde_struct): Add dw_fde_switch_cfi
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and dw_fde_switched_cold_to_hot fields.
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(output_cfi_p): New function.
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(output_call_frame_info): If fde->dw_fde_switched_sections,
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output 2 FDEs instead of one with corrupted header.
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(dwarf2out_do_cfi_startproc): New function.
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(dwarf2out_begin_prologue): Use it. Initialize fde->dw_fde_switch_cfi
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and fde->dw_fde_switched_cold_to_hot.
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(dwarf2out_switch_text_section): Compute
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fde->dw_fde_switched_cold_to_hot. Switch to new text section here.
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If dwarf2out_do_cfi_asm, emit .cfi_endproc before it and call
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dwarf2out_do_cfi_startproc plus emit again currently active CFI insns.
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Otherwise, compute fde->dw_fde_switch_cfi.
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2009-07-24 Cary Coutant <ccoutant@google.com>
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* tree-cfg.c (assign_discriminator): Add explicit parentheses.
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327
gcc/dwarf2out.c
327
gcc/dwarf2out.c
@ -268,8 +268,8 @@ typedef struct GTY(()) dw_fde_struct {
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const char *dw_fde_hot_section_end_label;
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const char *dw_fde_unlikely_section_label;
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const char *dw_fde_unlikely_section_end_label;
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bool dw_fde_switched_sections;
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dw_cfi_ref dw_fde_cfi;
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dw_cfi_ref dw_fde_switch_cfi; /* Last CFI before switching sections. */
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unsigned funcdef_number;
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HOST_WIDE_INT stack_realignment;
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/* Dynamic realign argument pointer register. */
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@ -288,6 +288,10 @@ typedef struct GTY(()) dw_fde_struct {
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/* True iff dw_fde_unlikely_section_label is in text_section or
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cold_text_section. */
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unsigned cold_in_std_section : 1;
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/* True iff switched sections. */
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unsigned dw_fde_switched_sections : 1;
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/* True iff switching from cold to hot section. */
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unsigned dw_fde_switched_cold_to_hot : 1;
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}
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dw_fde_node;
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@ -3210,6 +3214,57 @@ output_cfi_directive (dw_cfi_ref cfi)
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}
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}
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/* Return true if *CFIP should be output after switching sections. */
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static bool
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output_cfi_p (dw_cfi_ref *cfip, dw_cfi_ref *cfi_args_sizep)
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{
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dw_cfi_ref cfi = *cfip, cfi2;
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switch (cfi->dw_cfi_opc)
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{
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case DW_CFA_advance_loc:
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case DW_CFA_advance_loc1:
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case DW_CFA_advance_loc2:
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case DW_CFA_advance_loc4:
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case DW_CFA_MIPS_advance_loc8:
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case DW_CFA_set_loc:
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/* All advances should be ignored. */
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return false;
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case DW_CFA_remember_state:
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/* Skip everything between .cfi_remember_state and
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.cfi_restore_state. */
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for (cfi2 = cfi->dw_cfi_next; cfi2; cfi2 = cfi2->dw_cfi_next)
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if (cfi2->dw_cfi_opc == DW_CFA_restore_state)
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break;
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else if (cfi2->dw_cfi_opc == DW_CFA_GNU_args_size)
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*cfi_args_sizep = cfi2;
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else
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gcc_assert (cfi2->dw_cfi_opc != DW_CFA_remember_state);
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if (cfi2 == NULL)
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return true;
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*cfip = cfi2;
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return false;
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case DW_CFA_def_cfa_offset:
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case DW_CFA_def_cfa_offset_sf:
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/* Only keep the last of these if they are consecutive. */
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for (cfi2 = cfi->dw_cfi_next; cfi2; cfi2 = cfi2->dw_cfi_next)
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if (cfi2->dw_cfi_opc == cfi->dw_cfi_opc)
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*cfip = cfi2;
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else if (cfi2->dw_cfi_opc == DW_CFA_GNU_args_size)
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*cfi_args_sizep = cfi2;
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else
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break;
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return true;
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case DW_CFA_GNU_args_size:
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/* One DW_CFA_GNU_args_size, the last one, is enough. */
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*cfi_args_sizep = cfi;
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return false;
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default:
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return true;
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}
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}
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/* Output the call frame information used to record information
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that relates to calculating the frame pointer, and records the
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location of saved registers. */
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@ -3217,7 +3272,7 @@ output_cfi_directive (dw_cfi_ref cfi)
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static void
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output_call_frame_info (int for_eh)
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{
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unsigned int i;
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unsigned int i, j;
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dw_fde_ref fde;
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dw_cfi_ref cfi;
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char l1[20], l2[20], section_start_label[20];
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@ -3423,8 +3478,9 @@ output_call_frame_info (int for_eh)
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ASM_OUTPUT_LABEL (asm_out_file, l2);
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/* Loop through all of the FDE's. */
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for (i = 0; i < fde_table_in_use; i++)
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for (i = 0, j = 0; i < fde_table_in_use; i++)
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{
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unsigned int k;
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fde = &fde_table[i];
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/* Don't emit EH unwind info for leaf functions that don't need it. */
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@ -3434,86 +3490,63 @@ output_call_frame_info (int for_eh)
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&& !fde->uses_eh_lsda)
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continue;
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targetm.asm_out.unwind_label (asm_out_file, fde->decl, for_eh, /* empty */ 0);
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targetm.asm_out.internal_label (asm_out_file, FDE_LABEL, for_eh + i * 2);
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ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i * 2);
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ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i * 2);
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for (k = 0; k < (fde->dw_fde_switched_sections ? 2 : 1); k++)
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{
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const char *begin, *end;
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targetm.asm_out.unwind_label (asm_out_file, fde->decl, for_eh,
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/* empty */ 0);
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targetm.asm_out.internal_label (asm_out_file, FDE_LABEL,
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for_eh + j);
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ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + j);
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ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + j);
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if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4 && !for_eh)
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dw2_asm_output_data (4, 0xffffffff,
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"Initial length escape value indicating 64-bit DWARF extension");
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dw2_asm_output_data (4, 0xffffffff, "Initial length escape value"
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" indicating 64-bit DWARF extension");
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dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1,
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"FDE Length");
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ASM_OUTPUT_LABEL (asm_out_file, l1);
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if (for_eh)
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dw2_asm_output_delta (4, l1, section_start_label, "FDE CIE offset");
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dw2_asm_output_delta (4, l1, section_start_label,
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"FDE CIE offset");
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else
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dw2_asm_output_offset (DWARF_OFFSET_SIZE, section_start_label,
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debug_frame_section, "FDE CIE offset");
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if (for_eh)
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if (!fde->dw_fde_switched_sections)
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{
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if (fde->dw_fde_switched_sections)
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begin = fde->dw_fde_begin;
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end = fde->dw_fde_end;
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}
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else if (k ^ fde->dw_fde_switched_cold_to_hot)
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{
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rtx sym_ref2 = gen_rtx_SYMBOL_REF (Pmode,
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fde->dw_fde_unlikely_section_label);
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rtx sym_ref3= gen_rtx_SYMBOL_REF (Pmode,
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fde->dw_fde_hot_section_label);
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SYMBOL_REF_FLAGS (sym_ref2) |= SYMBOL_FLAG_LOCAL;
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SYMBOL_REF_FLAGS (sym_ref3) |= SYMBOL_FLAG_LOCAL;
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dw2_asm_output_encoded_addr_rtx (fde_encoding, sym_ref3, false,
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"FDE initial location");
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dw2_asm_output_delta (size_of_encoded_value (fde_encoding),
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fde->dw_fde_hot_section_end_label,
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fde->dw_fde_hot_section_label,
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"FDE address range");
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dw2_asm_output_encoded_addr_rtx (fde_encoding, sym_ref2, false,
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"FDE initial location");
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dw2_asm_output_delta (size_of_encoded_value (fde_encoding),
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fde->dw_fde_unlikely_section_end_label,
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fde->dw_fde_unlikely_section_label,
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"FDE address range");
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begin = fde->dw_fde_unlikely_section_label;
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end = fde->dw_fde_unlikely_section_end_label;
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}
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else
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{
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rtx sym_ref = gen_rtx_SYMBOL_REF (Pmode, fde->dw_fde_begin);
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begin = fde->dw_fde_hot_section_label;
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end = fde->dw_fde_hot_section_end_label;
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}
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if (for_eh)
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{
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rtx sym_ref = gen_rtx_SYMBOL_REF (Pmode, begin);
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SYMBOL_REF_FLAGS (sym_ref) |= SYMBOL_FLAG_LOCAL;
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dw2_asm_output_encoded_addr_rtx (fde_encoding,
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sym_ref,
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false,
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"FDE initial location");
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dw2_asm_output_delta (size_of_encoded_value (fde_encoding),
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fde->dw_fde_end, fde->dw_fde_begin,
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"FDE address range");
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}
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end, begin, "FDE address range");
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}
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else
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{
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if (fde->dw_fde_switched_sections)
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{
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dw2_asm_output_addr (DWARF2_ADDR_SIZE,
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fde->dw_fde_hot_section_label,
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dw2_asm_output_addr (DWARF2_ADDR_SIZE, begin,
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"FDE initial location");
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dw2_asm_output_delta (DWARF2_ADDR_SIZE,
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fde->dw_fde_hot_section_end_label,
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fde->dw_fde_hot_section_label,
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dw2_asm_output_delta (DWARF2_ADDR_SIZE, end, begin,
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"FDE address range");
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dw2_asm_output_addr (DWARF2_ADDR_SIZE,
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fde->dw_fde_unlikely_section_label,
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"FDE initial location");
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dw2_asm_output_delta (DWARF2_ADDR_SIZE,
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fde->dw_fde_unlikely_section_end_label,
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fde->dw_fde_unlikely_section_label,
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"FDE address range");
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}
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else
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{
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dw2_asm_output_addr (DWARF2_ADDR_SIZE, fde->dw_fde_begin,
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"FDE initial location");
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dw2_asm_output_delta (DWARF2_ADDR_SIZE,
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fde->dw_fde_end, fde->dw_fde_begin,
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"FDE address range");
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}
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}
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if (augmentation[0])
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@ -3540,16 +3573,17 @@ output_call_frame_info (int for_eh)
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{
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ASM_GENERATE_INTERNAL_LABEL (l1, "LLSDA",
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fde->funcdef_number);
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dw2_asm_output_encoded_addr_rtx (
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lsda_encoding, gen_rtx_SYMBOL_REF (Pmode, l1),
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false, "Language Specific Data Area");
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dw2_asm_output_encoded_addr_rtx (lsda_encoding,
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gen_rtx_SYMBOL_REF (Pmode, l1),
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false,
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"Language Specific Data Area");
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}
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else
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{
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if (lsda_encoding == DW_EH_PE_aligned)
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ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
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dw2_asm_output_data
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(size_of_encoded_value (lsda_encoding), 0,
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dw2_asm_output_data (
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size_of_encoded_value (lsda_encoding), 0,
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"Language Specific Data Area (none)");
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}
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}
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@ -3559,14 +3593,51 @@ output_call_frame_info (int for_eh)
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/* Loop through the Call Frame Instructions associated with
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this FDE. */
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fde->dw_fde_current_label = fde->dw_fde_begin;
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fde->dw_fde_current_label = begin;
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if (!fde->dw_fde_switched_sections)
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for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
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output_cfi (cfi, fde, for_eh);
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else if (k == 0)
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{
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if (fde->dw_fde_switch_cfi)
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for (cfi = fde->dw_fde_cfi; cfi != NULL;
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cfi = cfi->dw_cfi_next)
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{
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output_cfi (cfi, fde, for_eh);
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if (cfi == fde->dw_fde_switch_cfi)
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break;
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}
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}
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else
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{
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dw_cfi_ref cfi_next = fde->dw_fde_cfi;
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if (fde->dw_fde_switch_cfi)
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{
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dw_cfi_ref cfi_args_size = NULL;
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cfi_next = fde->dw_fde_switch_cfi->dw_cfi_next;
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fde->dw_fde_switch_cfi->dw_cfi_next = NULL;
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for (cfi = fde->dw_fde_cfi; cfi != NULL;
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cfi = cfi->dw_cfi_next)
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if (output_cfi_p (&cfi, &cfi_args_size))
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output_cfi (cfi, fde, for_eh);
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if (cfi_args_size
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&& cfi_args_size->dw_cfi_oprnd1.dw_cfi_offset)
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output_cfi (cfi_args_size, fde, for_eh);
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fde->dw_fde_switch_cfi->dw_cfi_next = cfi_next;
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}
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for (cfi = cfi_next; cfi != NULL; cfi = cfi->dw_cfi_next)
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output_cfi (cfi, fde, for_eh);
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}
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/* Pad the FDE out to an address sized boundary. */
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ASM_OUTPUT_ALIGN (asm_out_file,
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floor_log2 ((for_eh ? PTR_SIZE : DWARF2_ADDR_SIZE)));
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floor_log2 ((for_eh
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? PTR_SIZE : DWARF2_ADDR_SIZE)));
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ASM_OUTPUT_LABEL (asm_out_file, l2);
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j += 2;
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}
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}
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if (for_eh && targetm.terminate_dw2_eh_frame_info)
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@ -3582,6 +3653,52 @@ output_call_frame_info (int for_eh)
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app_disable ();
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}
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/* Emit .cfi_startproc and .cfi_personality/.cfi_lsda if needed. */
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static void
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dwarf2out_do_cfi_startproc (void)
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{
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int enc;
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rtx ref;
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fprintf (asm_out_file, "\t.cfi_startproc\n");
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if (eh_personality_libfunc)
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{
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enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1);
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ref = eh_personality_libfunc;
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/* ??? The GAS support isn't entirely consistent. We have to
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handle indirect support ourselves, but PC-relative is done
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in the assembler. Further, the assembler can't handle any
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of the weirder relocation types. */
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if (enc & DW_EH_PE_indirect)
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ref = dw2_force_const_mem (ref, true);
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fprintf (asm_out_file, "\t.cfi_personality 0x%x,", enc);
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output_addr_const (asm_out_file, ref);
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fputc ('\n', asm_out_file);
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}
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if (crtl->uses_eh_lsda)
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{
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char lab[20];
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enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/0);
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ASM_GENERATE_INTERNAL_LABEL (lab, "LLSDA",
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current_function_funcdef_no);
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ref = gen_rtx_SYMBOL_REF (Pmode, lab);
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SYMBOL_REF_FLAGS (ref) = SYMBOL_FLAG_LOCAL;
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if (enc & DW_EH_PE_indirect)
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ref = dw2_force_const_mem (ref, true);
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fprintf (asm_out_file, "\t.cfi_lsda 0x%x,", enc);
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output_addr_const (asm_out_file, ref);
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fputc ('\n', asm_out_file);
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}
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}
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/* Output a marker (i.e. a label) for the beginning of a function, before
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the prologue. */
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@ -3644,9 +3761,11 @@ dwarf2out_begin_prologue (unsigned int line ATTRIBUTE_UNUSED,
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fde->dw_fde_hot_section_end_label = NULL;
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fde->dw_fde_unlikely_section_label = NULL;
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fde->dw_fde_unlikely_section_end_label = NULL;
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fde->dw_fde_switched_sections = false;
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fde->dw_fde_switched_sections = 0;
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fde->dw_fde_switched_cold_to_hot = 0;
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fde->dw_fde_end = NULL;
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fde->dw_fde_cfi = NULL;
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fde->dw_fde_switch_cfi = NULL;
|
||||
fde->funcdef_number = current_function_funcdef_no;
|
||||
fde->nothrow = crtl->nothrow;
|
||||
fde->uses_eh_lsda = crtl->uses_eh_lsda;
|
||||
@ -3685,47 +3804,7 @@ dwarf2out_begin_prologue (unsigned int line ATTRIBUTE_UNUSED,
|
||||
#endif
|
||||
|
||||
if (dwarf2out_do_cfi_asm ())
|
||||
{
|
||||
int enc;
|
||||
rtx ref;
|
||||
|
||||
fprintf (asm_out_file, "\t.cfi_startproc\n");
|
||||
|
||||
if (eh_personality_libfunc)
|
||||
{
|
||||
enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1);
|
||||
ref = eh_personality_libfunc;
|
||||
|
||||
/* ??? The GAS support isn't entirely consistent. We have to
|
||||
handle indirect support ourselves, but PC-relative is done
|
||||
in the assembler. Further, the assembler can't handle any
|
||||
of the weirder relocation types. */
|
||||
if (enc & DW_EH_PE_indirect)
|
||||
ref = dw2_force_const_mem (ref, true);
|
||||
|
||||
fprintf (asm_out_file, "\t.cfi_personality 0x%x,", enc);
|
||||
output_addr_const (asm_out_file, ref);
|
||||
fputc ('\n', asm_out_file);
|
||||
}
|
||||
|
||||
if (crtl->uses_eh_lsda)
|
||||
{
|
||||
char lab[20];
|
||||
|
||||
enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/0);
|
||||
ASM_GENERATE_INTERNAL_LABEL (lab, "LLSDA",
|
||||
current_function_funcdef_no);
|
||||
ref = gen_rtx_SYMBOL_REF (Pmode, lab);
|
||||
SYMBOL_REF_FLAGS (ref) = SYMBOL_FLAG_LOCAL;
|
||||
|
||||
if (enc & DW_EH_PE_indirect)
|
||||
ref = dw2_force_const_mem (ref, true);
|
||||
|
||||
fprintf (asm_out_file, "\t.cfi_lsda 0x%x,", enc);
|
||||
output_addr_const (asm_out_file, ref);
|
||||
fputc ('\n', asm_out_file);
|
||||
}
|
||||
}
|
||||
dwarf2out_do_cfi_startproc ();
|
||||
}
|
||||
|
||||
/* Output a marker (i.e. a label) for the absolute end of the generated code
|
||||
@ -3807,9 +3886,11 @@ dwarf2out_switch_text_section (void)
|
||||
{
|
||||
dw_fde_ref fde = current_fde ();
|
||||
|
||||
gcc_assert (cfun && fde);
|
||||
gcc_assert (cfun && fde && !fde->dw_fde_switched_sections);
|
||||
|
||||
fde->dw_fde_switched_sections = 1;
|
||||
fde->dw_fde_switched_cold_to_hot = !in_cold_section_p;
|
||||
|
||||
fde->dw_fde_switched_sections = true;
|
||||
fde->dw_fde_hot_section_label = crtl->subsections.hot_section_label;
|
||||
fde->dw_fde_hot_section_end_label = crtl->subsections.hot_section_end_label;
|
||||
fde->dw_fde_unlikely_section_label = crtl->subsections.cold_section_label;
|
||||
@ -3823,6 +3904,36 @@ dwarf2out_switch_text_section (void)
|
||||
/* There is no need to mark used sections when not debugging. */
|
||||
if (cold_text_section != NULL)
|
||||
dwarf2out_note_section_used ();
|
||||
|
||||
if (dwarf2out_do_cfi_asm ())
|
||||
fprintf (asm_out_file, "\t.cfi_endproc\n");
|
||||
|
||||
/* Now do the real section switch. */
|
||||
switch_to_section (current_function_section ());
|
||||
|
||||
if (dwarf2out_do_cfi_asm ())
|
||||
{
|
||||
dw_cfi_ref cfi, cfi_args_size = NULL;
|
||||
|
||||
dwarf2out_do_cfi_startproc ();
|
||||
/* As this is a different FDE, insert all current CFI instructions
|
||||
again. */
|
||||
for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
|
||||
if (output_cfi_p (&cfi, &cfi_args_size))
|
||||
output_cfi_directive (cfi);
|
||||
if (cfi_args_size && cfi_args_size->dw_cfi_oprnd1.dw_cfi_offset)
|
||||
output_cfi_directive (cfi_args_size);
|
||||
}
|
||||
else
|
||||
{
|
||||
dw_cfi_ref cfi = fde->dw_fde_cfi;
|
||||
|
||||
cfi = fde->dw_fde_cfi;
|
||||
if (cfi)
|
||||
while (cfi->dw_cfi_next != NULL)
|
||||
cfi = cfi->dw_cfi_next;
|
||||
fde->dw_fde_switch_cfi = cfi;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user