diff options
Diffstat (limited to 'vendor/backtrace/src/symbolize/gimli/parse_running_mmaps_unix.rs')
| -rw-r--r-- | vendor/backtrace/src/symbolize/gimli/parse_running_mmaps_unix.rs | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/vendor/backtrace/src/symbolize/gimli/parse_running_mmaps_unix.rs b/vendor/backtrace/src/symbolize/gimli/parse_running_mmaps_unix.rs deleted file mode 100644 index 5d4b346..0000000 --- a/vendor/backtrace/src/symbolize/gimli/parse_running_mmaps_unix.rs +++ /dev/null @@ -1,295 +0,0 @@ -// Note: This file is only currently used on targets that call out to the code -// in `mod libs_dl_iterate_phdr` (e.g. linux, freebsd, ...); it may be more -// general purpose, but it hasn't been tested elsewhere. - -use super::mystd::fs::File; -use super::mystd::io::Read; -use super::mystd::str::FromStr; -use super::{OsString, String, Vec}; - -#[derive(PartialEq, Eq, Debug)] -pub(super) struct MapsEntry { - /// start (inclusive) and limit (exclusive) of address range. - address: (usize, usize), - /// The perms field are the permissions for the entry - /// - /// r = read - /// w = write - /// x = execute - /// s = shared - /// p = private (copy on write) - perms: [char; 4], - /// Offset into the file (or "whatever"). - offset: usize, - /// device (major, minor) - dev: (usize, usize), - /// inode on the device. 0 indicates that no inode is associated with the memory region (e.g. uninitalized data aka BSS). - inode: usize, - /// Usually the file backing the mapping. - /// - /// Note: The man page for proc includes a note about "coordination" by - /// using readelf to see the Offset field in ELF program headers. pnkfelix - /// is not yet sure if that is intended to be a comment on pathname, or what - /// form/purpose such coordination is meant to have. - /// - /// There are also some pseudo-paths: - /// "[stack]": The initial process's (aka main thread's) stack. - /// "[stack:<tid>]": a specific thread's stack. (This was only present for a limited range of Linux verisons; it was determined to be too expensive to provide.) - /// "[vdso]": Virtual dynamically linked shared object - /// "[heap]": The process's heap - /// - /// The pathname can be blank, which means it is an anonymous mapping - /// obtained via mmap. - /// - /// Newlines in pathname are replaced with an octal escape sequence. - /// - /// The pathname may have "(deleted)" appended onto it if the file-backed - /// path has been deleted. - /// - /// Note that modifications like the latter two indicated above imply that - /// in general the pathname may be ambiguous. (I.e. you cannot tell if the - /// denoted filename actually ended with the text "(deleted)", or if that - /// was added by the maps rendering. - pathname: OsString, -} - -pub(super) fn parse_maps() -> Result<Vec<MapsEntry>, &'static str> { - let mut v = Vec::new(); - let mut proc_self_maps = - File::open("/proc/self/maps").map_err(|_| "Couldn't open /proc/self/maps")?; - let mut buf = String::new(); - let _bytes_read = proc_self_maps - .read_to_string(&mut buf) - .map_err(|_| "Couldn't read /proc/self/maps")?; - for line in buf.lines() { - v.push(line.parse()?); - } - - Ok(v) -} - -impl MapsEntry { - pub(super) fn pathname(&self) -> &OsString { - &self.pathname - } - - pub(super) fn ip_matches(&self, ip: usize) -> bool { - self.address.0 <= ip && ip < self.address.1 - } -} - -impl FromStr for MapsEntry { - type Err = &'static str; - - // Format: address perms offset dev inode pathname - // e.g.: "ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]" - // e.g.: "7f5985f46000-7f5985f48000 rw-p 00039000 103:06 76021795 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2" - // e.g.: "35b1a21000-35b1a22000 rw-p 00000000 00:00 0" - // - // Note that paths may contain spaces, so we can't use `str::split` for parsing (until - // Split::remainder is stabilized #77998). - fn from_str(s: &str) -> Result<Self, Self::Err> { - let (range_str, s) = s.trim_start().split_once(' ').unwrap_or((s, "")); - if range_str.is_empty() { - return Err("Couldn't find address"); - } - - let (perms_str, s) = s.trim_start().split_once(' ').unwrap_or((s, "")); - if perms_str.is_empty() { - return Err("Couldn't find permissions"); - } - - let (offset_str, s) = s.trim_start().split_once(' ').unwrap_or((s, "")); - if offset_str.is_empty() { - return Err("Couldn't find offset"); - } - - let (dev_str, s) = s.trim_start().split_once(' ').unwrap_or((s, "")); - if dev_str.is_empty() { - return Err("Couldn't find dev"); - } - - let (inode_str, s) = s.trim_start().split_once(' ').unwrap_or((s, "")); - if inode_str.is_empty() { - return Err("Couldn't find inode"); - } - - // Pathname may be omitted in which case it will be empty - let pathname_str = s.trim_start(); - - let hex = |s| usize::from_str_radix(s, 16).map_err(|_| "Couldn't parse hex number"); - let address = if let Some((start, limit)) = range_str.split_once('-') { - (hex(start)?, hex(limit)?) - } else { - return Err("Couldn't parse address range"); - }; - let perms: [char; 4] = { - let mut chars = perms_str.chars(); - let mut c = || chars.next().ok_or("insufficient perms"); - let perms = [c()?, c()?, c()?, c()?]; - if chars.next().is_some() { - return Err("too many perms"); - } - perms - }; - let offset = hex(offset_str)?; - let dev = if let Some((major, minor)) = dev_str.split_once(':') { - (hex(major)?, hex(minor)?) - } else { - return Err("Couldn't parse dev"); - }; - let inode = hex(inode_str)?; - let pathname = pathname_str.into(); - - Ok(MapsEntry { - address, - perms, - offset, - dev, - inode, - pathname, - }) - } -} - -// Make sure we can parse 64-bit sample output if we're on a 64-bit target. -#[cfg(target_pointer_width = "64")] -#[test] -fn check_maps_entry_parsing_64bit() { - assert_eq!( - "ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 \ - [vsyscall]" - .parse::<MapsEntry>() - .unwrap(), - MapsEntry { - address: (0xffffffffff600000, 0xffffffffff601000), - perms: ['-', '-', 'x', 'p'], - offset: 0x00000000, - dev: (0x00, 0x00), - inode: 0x0, - pathname: "[vsyscall]".into(), - } - ); - - assert_eq!( - "7f5985f46000-7f5985f48000 rw-p 00039000 103:06 76021795 \ - /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2" - .parse::<MapsEntry>() - .unwrap(), - MapsEntry { - address: (0x7f5985f46000, 0x7f5985f48000), - perms: ['r', 'w', '-', 'p'], - offset: 0x00039000, - dev: (0x103, 0x06), - inode: 0x76021795, - pathname: "/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2".into(), - } - ); - assert_eq!( - "35b1a21000-35b1a22000 rw-p 00000000 00:00 0" - .parse::<MapsEntry>() - .unwrap(), - MapsEntry { - address: (0x35b1a21000, 0x35b1a22000), - perms: ['r', 'w', '-', 'p'], - offset: 0x00000000, - dev: (0x00, 0x00), - inode: 0x0, - pathname: Default::default(), - } - ); -} - -// (This output was taken from a 32-bit machine, but will work on any target) -#[test] -fn check_maps_entry_parsing_32bit() { - /* Example snippet of output: - 08056000-08077000 rw-p 00000000 00:00 0 [heap] - b7c79000-b7e02000 r--p 00000000 08:01 60662705 /usr/lib/locale/locale-archive - b7e02000-b7e03000 rw-p 00000000 00:00 0 - */ - assert_eq!( - "08056000-08077000 rw-p 00000000 00:00 0 \ - [heap]" - .parse::<MapsEntry>() - .unwrap(), - MapsEntry { - address: (0x08056000, 0x08077000), - perms: ['r', 'w', '-', 'p'], - offset: 0x00000000, - dev: (0x00, 0x00), - inode: 0x0, - pathname: "[heap]".into(), - } - ); - - assert_eq!( - "b7c79000-b7e02000 r--p 00000000 08:01 60662705 \ - /usr/lib/locale/locale-archive" - .parse::<MapsEntry>() - .unwrap(), - MapsEntry { - address: (0xb7c79000, 0xb7e02000), - perms: ['r', '-', '-', 'p'], - offset: 0x00000000, - dev: (0x08, 0x01), - inode: 0x60662705, - pathname: "/usr/lib/locale/locale-archive".into(), - } - ); - assert_eq!( - "b7e02000-b7e03000 rw-p 00000000 00:00 0" - .parse::<MapsEntry>() - .unwrap(), - MapsEntry { - address: (0xb7e02000, 0xb7e03000), - perms: ['r', 'w', '-', 'p'], - offset: 0x00000000, - dev: (0x00, 0x00), - inode: 0x0, - pathname: Default::default(), - } - ); - assert_eq!( - "b7c79000-b7e02000 r--p 00000000 08:01 60662705 \ - /executable/path/with some spaces" - .parse::<MapsEntry>() - .unwrap(), - MapsEntry { - address: (0xb7c79000, 0xb7e02000), - perms: ['r', '-', '-', 'p'], - offset: 0x00000000, - dev: (0x08, 0x01), - inode: 0x60662705, - pathname: "/executable/path/with some spaces".into(), - } - ); - assert_eq!( - "b7c79000-b7e02000 r--p 00000000 08:01 60662705 \ - /executable/path/with multiple-continuous spaces " - .parse::<MapsEntry>() - .unwrap(), - MapsEntry { - address: (0xb7c79000, 0xb7e02000), - perms: ['r', '-', '-', 'p'], - offset: 0x00000000, - dev: (0x08, 0x01), - inode: 0x60662705, - pathname: "/executable/path/with multiple-continuous spaces ".into(), - } - ); - assert_eq!( - " b7c79000-b7e02000 r--p 00000000 08:01 60662705 \ - /executable/path/starts-with-spaces" - .parse::<MapsEntry>() - .unwrap(), - MapsEntry { - address: (0xb7c79000, 0xb7e02000), - perms: ['r', '-', '-', 'p'], - offset: 0x00000000, - dev: (0x08, 0x01), - inode: 0x60662705, - pathname: "/executable/path/starts-with-spaces".into(), - } - ); -} |