Makefile

@@ -7,4 +7,4 @@ clean:
 	rm -f *aux *bbl *bcf *blg *_latexmk *fls *log *out *.run.xml
 
 upload: build
-	scp slides.pdf www.tobast:~/files/slides-oopsla19.pdf
+	scp slides.pdf www.tobast:~/files/oracle18.pdf

README.md

@@ -1,4 +1,3 @@
-# Slides for OOPSLA19 "Reliable and Fast DWARF-based Stack Unwinding"
+# Presentation, Uppsala, 2018-11
 
-This repository contains the slides for OOPSLA19 presentation "Reliable and
-Fast DWARF-based Stack Unwinding".
+Slides for a presentation at Uppsala, related to UPMARC'18

demo.old/demo.c

@@ -1,14 +0,0 @@
-#include <stdio.h>
-
-int bar(int x) {
-	printf("'I’m %d; how many? %n\n", x, &x);
-	return x;
-}
-
-int foo() {
-	return bar(3);
-}
-
-int main() {
-	return foo();
-}

demo.old/synth.sh

@@ -1,12 +0,0 @@
-#!/bin/bash
-
-SYNTHESIS_SCRIPT="../../../src/dwarf-synthesis/synthesize_dwarf.sh"
-
-if [ "$#" -lt 1 ] ; then
-    >&2 echo -e "Missing argument: object file.\nUsage: $0 object.o"
-    exit 1
-fi
-
-objfile="$1"
-
-$SYNTHESIS_SCRIPT "$objfile" "$objfile.synth"

demo/.gitignore

@@ -1,3 +0,0 @@
-dwarf-synthesis
-tests/data*
-tests/*.synth

demo/Makefile

@@ -1,9 +0,0 @@
-all:
-	@>&2 echo "Please provide an explicit target"
-	@exit 1
-
-tests/data:
-	dd if=/dev/urandom of="$@" bs=512K count=4
-
-clean:
-	rm -f tests/data.gz tests/gzip.synth

demo/synthesize.sh

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-./dwarf-synthesis/synthesize_dwarf.sh $* 2>/dev/null

demo/zip.c

@@ -1,132 +0,0 @@
-/* zip.c -- compress files to the gzip or pkzip format
-
-   Copyright (C) 1997-1999, 2006-2007, 2009-2018 Free Software Foundation, Inc.
-   Copyright (C) 1992-1993 Jean-loup Gailly
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
-
-#include <config.h>
-#include <ctype.h>
-
-#include "tailor.h"
-#include "gzip.h"
-
-local ulg crc;       /* crc on uncompressed file data */
-off_t header_bytes;   /* number of bytes in gzip header */
-
-/* ===========================================================================
- * Deflate in to out.
- * IN assertions: the input and output buffers are cleared.
- *   The variables time_stamp and save_orig_name are initialized.
- */
-int zip(in, out)
-    int in, out;            /* input and output file descriptors */
-{
-    uch  flags = 0;         /* general purpose bit flags */
-    ush  attr = 0;          /* ascii/binary flag */
-    ush  deflate_flags = 0; /* pkzip -es, -en or -ex equivalent */
-    ulg  stamp;
-
-    ifd = in;
-    ofd = out;
-    outcnt = 0;
-
-    /* Write the header to the gzip file. See algorithm.doc for the format */
-
-    method = DEFLATED;
-    put_byte(GZIP_MAGIC[0]); /* magic header */
-    put_byte(GZIP_MAGIC[1]);
-    put_byte(DEFLATED);      /* compression method */
-
-    if (save_orig_name) {
-        flags |= ORIG_NAME;
-    }
-    put_byte(flags);         /* general flags */
-    if (time_stamp.tv_nsec < 0)
-      stamp = 0;
-    else if (0 < time_stamp.tv_sec && time_stamp.tv_sec <= 0xffffffff)
-      stamp = time_stamp.tv_sec;
-    else
-      {
-        /* It's intended that timestamp 0 generates this warning,
-           since gzip format reserves 0 for something else.  */
-        warning ("file timestamp out of range for gzip format");
-        stamp = 0;
-      }
-    put_long (stamp);
-
-    /* Write deflated file to zip file */
-    crc = updcrc(0, 0);
-
-    bi_init(out);
-    ct_init(&attr, &method);
-    lm_init(level, &deflate_flags);
-
-    put_byte((uch)deflate_flags); /* extra flags */
-    put_byte(OS_CODE);            /* OS identifier */
-
-    if (save_orig_name) {
-        char *p = gzip_base_name (ifname); /* Don't save the directory part. */
-        do {
-            put_byte (*p);
-        } while (*p++);
-    }
-    header_bytes = (off_t)outcnt;
-
-    (void)deflate();
-
-#ifndef NO_SIZE_CHECK
-  /* Check input size
-   * (but not on MSDOS -- diet in TSR mode reports an incorrect file size)
-   */
-    if (ifile_size != -1L && bytes_in != ifile_size) {
-        fprintf(stderr, "%s: %s: file size changed while zipping\n",
-                program_name, ifname);
-    }
-#endif
-
-    /* Write the crc and uncompressed size */
-    put_long(crc);
-    put_long((ulg)bytes_in);
-    header_bytes += 2*4;
-
-    flush_outbuf();
-    return OK;
-}
-
-
-/* ===========================================================================
- * Read a new buffer from the current input file, perform end-of-line
- * translation, and update the crc and input file size.
- * IN assertion: size >= 2 (for end-of-line translation)
- */
-int file_read(buf, size)
-    char *buf;
-    unsigned size;
-{
-    unsigned len;
-
-    Assert(insize == 0, "inbuf not empty");
-
-    len = read_buffer (ifd, buf, size);
-    if (len == 0) return (int)len;
-    if (len == (unsigned)-1) {
-        read_error();
-    }
-
-    crc = updcrc((uch*)buf, len);
-    bytes_in += (off_t)len;
-    return (int)len;
-}

src/dw_plt

@@ -1,7 +0,0 @@
-30 24 34 FDE pc=004020..004040
-  DW_CFA_def_cfa_offset: 16
-  DW_CFA_advance_loc: 6 to 0000000000004026
-  DW_CFA_def_cfa_offset: 24
-  DW_CFA_advance_loc: 10 to 0000000000004030
-  DW_CFA_def_cfa_expression (DW_OP_breg7 (rsp): 8; DW_OP_breg16 (rip): 0; DW_OP_lit15; DW_OP_and; DW_OP_lit11; DW_OP_ge; DW_OP_lit3; DW_OP_shl; DW_OP_plus)
-  [...]

src/dw_plt_abbr

@@ -1,7 +0,0 @@
-30 24 34 FDE pc=004020..004040
-  DW_CFA_def_cfa_offset: 16
-  DW_CFA_advance_loc: 6 to 0000000000004026
-  DW_CFA_def_cfa_offset: 24
-  DW_CFA_advance_loc: 10 to 0000000000004030
-  DW_CFA_def_cfa_expression (DW_OP_breg7 (rsp): 8;
-    DW_OP_breg16 (rip): 0; ...)

src/lowlevellock_backtrace

@@ -1,5 +0,0 @@
-(gdb) backtrace
-#0 0x406c2c in _L_lock_19
-#1 0x406c2c in _L_lock_19
-#2 0x4069c6 in abort
-#3 0x401017 in main

src/lowlevellock_dw.c

@@ -1,25 +0,0 @@
-#define LLL_STUB_UNWIND_INFO_START
-    ".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 RA Column\n\t"
-    ".byte    0x8                    # Augmentation size\n\t"
-    ".uleb128 0x1                    # FDE Encoding (pcrel sdata4)\n\t"
-    ".byte    0x1b                   # DW_CFA_def_cfa\n\t"
-    ".byte    0xc\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"

src/lowlevellock_dw_extr.c

@@ -1,24 +0,0 @@
-    .section    .eh_frame,"a",@progbits
-5:  .long    7f-6f       # Length of Common Information Entry
-6:  .long    0x0         # CIE Identifier Tag
-    .byte    0x1         # CIE Version
-    .ascii "zR\\0"       # CIE Augmentation
-    .uleb128 0x1         # CIE Code Alignment Factor
-    .sleb128 -4          # CIE RA Column
-    .byte    0x8         # Augmentation size
-    .uleb128 0x1         # FDE Encoding (pcrel sdata4)
-    .byte    0x1b        # DW_CFA_def_cfa
-    .byte    0xc
-    .uleb128 0x4
-    .uleb128 0x0
-    .align 4
-7:  .long    17f-8f      # FDE Length
-8:  .long    8b-5b       # FDE CIE offset
-    .long    1b-.        # FDE initial location
-    .long    4b-1b       # FDE address range
-    .uleb128 0x0         # Augmentation size
-    .byte    0x16        # DW_CFA_val_expression
-    .uleb128 0x8
-    .uleb128 10f-9f
-9:  .byte    0x78        # DW_OP_breg8
-    .sleb128 3b-1b

src/main_cfi.s

@@ -1,10 +0,0 @@
-main:
-.cfi_startproc
-pushq	%rbp
-.cfi_def_cfa_offset 16
-.cfi_offset 6, -16
-movq	%rsp, %rbp
-.cfi_def_cfa_register 6
-subq	$32, %rsp
-movl    %edi, -20(%rbp)
-movq    %rsi, -32(%rbp)

src/main_cfi_full.s

@@ -1,27 +0,0 @@
-main:
-.LFB6:
-        .cfi_startproc
-        pushq   %rbp
-        .cfi_def_cfa_offset 16
-        .cfi_offset 6, -16
-        movq    %rsp, %rbp
-        .cfi_def_cfa_register 6
-        subq    $32, %rsp
-        movl    %edi, -20(%rbp)
-        movq    %rsi, -32(%rbp)
-        movq    -32(%rbp), %rax
-        addq    $8, %rax
-        movq    (%rax), %rax
-        movq    %rax, %rdi
-        call    atoi@PLT
-        movl    %eax, -4(%rbp)
-        movl    -4(%rbp), %eax
-        leave
-        .cfi_def_cfa 7, 8
-        ret
-        .cfi_endproc
-.LFE6:
-        .size   main, .-main
-        .ident  "GCC: (GNU) 9.2.0"
-        .section        .note.GNU-stack,"",@progbits
-