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gdb: test for bad kernel behavior.

This commit is contained in:
Cedric BAIL 2013-12-19 17:05:40 +09:00
parent 147f088efa
commit 56d9c12676
1 changed files with 17 additions and 8 deletions
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25
src/bin/e_start_main.c
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@ -492,6 +492,7 @@ main(int argc, char **argv)
Eina_Bool done = EINA_FALSE;
Eina_Bool remember_sigill = EINA_FALSE;
Eina_Bool remember_sigusr1 = EINA_FALSE;
Eina_Bool bad_kernel = EINA_FALSE;
#ifdef HAVE_SYS_PTRACE_H
if (!really_know)
@ -564,10 +565,22 @@ main(int argc, char **argv)
/* And call gdb if available */
r = 0;
if (home)
{
struct stat st;
/* Check if patch to prevent ptrace to another process is present in the kernel. */
{
int fd;
char c;
fd = open("/proc/sys/kernel/yama/ptrace_scope", O_RDONLY);
if (fd != -1)
{
if (read(fd, &c, sizeof (c)) == sizeof (c) && c != '0')
bad_kernel = EINA_TRUE;
}
close(fd);
}
if (home && !bad_kernel)
{
/* call e_sys gdb */
snprintf(buffer, sizeof(buffer),
"gdb "
@ -588,11 +601,7 @@ main(int argc, char **argv)
"%s/.e-crashdump.txt",
home);
/* Check the file was correctly generated (may fail on crappy kernel with ptrace
diable). In which case a manual : echo 0 > /proc/sys/kernel/yama/ptrace_scope
as root is necessary. */
if (!stat(buffer, &st))
backtrace_str = strdup(buffer);
backtrace_str = strdup(buffer);
r = WEXITSTATUS(r);
}