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Make blink support conditionally linkable into APE

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This commit is contained in:
Justine Tunney 2023-06-17 07:55:35 -07:00
parent 52d28966f7
commit 562a1384cd
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GPG key ID: BE714B4575D6E328
21 changed files with 288 additions and 269 deletions
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58
libc/log/attachdebugger.c
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@ -17,8 +17,10 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/fmt/fmt.h"
#include "libc/intrin/kprintf.h"
#include "libc/fmt/itoa.h"
#include "libc/intrin/safemacros.internal.h"
#include "libc/log/color.internal.h"
#include "libc/log/gdb.h"
@ -31,9 +33,11 @@
#include "libc/runtime/symbols.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/at.h"
#include "libc/sysv/consts/fileno.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/w.h"
#include "libc/sysv/errfuns.h"
/**
* Launches GDB debugger GUI for current process.
@ -54,14 +58,18 @@
relegated int(AttachDebugger)(intptr_t continuetoaddr) {
int pid, ttyfd;
struct StackFrame *bp;
char pidstr[11], breakcmd[40];
char pidstr[12], breakcmd[40];
const char *se, *elf, *gdb, *rewind, *layout;
__restore_tty();
if (IsGenuineBlink() || !(gdb = GetGdbPath()) || !isatty(0) || !isatty(1) ||
(ttyfd = open(_PATH_TTY, O_RDWR | O_CLOEXEC)) == -1) {
return -1;
if (!IsLinux() || //
IsGenuineBlink() || //
!(gdb = GetGdbPath()) || //
!isatty(0) || //
!isatty(1) || //
(ttyfd = sys_openat(AT_FDCWD, _PATH_TTY, O_RDWR | O_CLOEXEC, 0)) == -1) {
return enosys();
}
ksnprintf(pidstr, sizeof(pidstr), "%u", getpid());
FormatUint32(pidstr, getpid());
layout = "layout asm";
if ((elf = FindDebugBinary())) {
se = "-se";
@ -76,29 +84,31 @@ relegated int(AttachDebugger)(intptr_t continuetoaddr) {
continuetoaddr = bp->addr;
}
rewind = "-ex";
ksnprintf(breakcmd, sizeof(breakcmd), "%s *%#p", "break", continuetoaddr);
FormatHex64(stpcpy(breakcmd, "break *"), continuetoaddr, 1);
} else {
rewind = NULL;
breakcmd[0] = '\0';
}
if (!(pid = fork())) {
dup2(ttyfd, 0);
dup2(ttyfd, 1);
execv(gdb, (char *const[]){
"gdb", "--tui",
"-p", pidstr,
se, elf,
"-ex", "set osabi GNU/Linux",
"-ex", "set complaints 0",
"-ex", "set confirm off",
"-ex", layout,
"-ex", "layout reg",
"-ex", "set var g_gdbsync = 1",
"-q", rewind,
breakcmd, "-ex",
"c", NULL,
});
abort();
sys_dup2(ttyfd, 0, 0);
sys_dup2(ttyfd, 1, 0);
__sys_execve(gdb,
(char *const[]){
"gdb", "--tui",
"-p", pidstr,
se, elf,
"-ex", "set osabi GNU/Linux",
"-ex", "set complaints 0",
"-ex", "set confirm off",
"-ex", layout,
"-ex", "layout reg",
"-ex", "set var g_gdbsync = 1",
"-q", rewind,
breakcmd, "-ex",
"c", NULL,
},
environ);
__builtin_trap();
}
return pid;
}