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https://github.com/jart/cosmopolitan.git
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19c81863a3
We're now able to pretty print a C++ backtrace upon crashing in pretty much any runtime execution scenario. The default pledge sandbox policy on Linux is now to return EPERM. If you call pledge and have debugging functions linked (e.g. GetSymbolTable) then the symbol table shall get loaded before any security policy is put in place. This change updates build/bootstrap/fixupobj too and fixes some other sneaky build errors.
68 lines
2.9 KiB
C
68 lines
2.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/atomic.h"
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#include "libc/calls/calls.h"
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#include "libc/cosmo.h"
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#include "libc/errno.h"
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#include "libc/limits.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/str.h"
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#ifdef __x86_64__
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#define ADDR2LINE "cosmocc/3.2/bin/x86_64-linux-musl-addr2line"
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#elif defined(__aarch64__)
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#define ADDR2LINE "cosmocc/3.2/bin/aarch64-linux-musl-addr2line"
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#endif
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static struct {
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atomic_uint once;
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char *res;
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char buf[PATH_MAX];
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} g_addr2line;
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void GetAddr2linePathInit(void) {
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char *res;
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int e = errno;
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const char *env, *cmd, *path;
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if ((env = getenv("ADDR2LINE"))) {
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cmd = env;
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path = env;
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} else {
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cmd = "addr2line";
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path = ADDR2LINE;
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}
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char *buf = g_addr2line.buf;
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if (isexecutable(path)) {
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if (*path != '/' && getcwd(buf, PATH_MAX)) {
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strlcat(buf, "/", PATH_MAX);
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}
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strlcat(buf, path, PATH_MAX);
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res = buf;
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} else {
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res = commandv(cmd, buf, PATH_MAX);
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}
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g_addr2line.res = res;
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errno = e;
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}
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const char *GetAddr2linePath(void) {
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cosmo_once(&g_addr2line.once, GetAddr2linePathInit);
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return g_addr2line.res;
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}
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