diff options
author | kali kaneko (leap communications) <kali@leap.se> | 2021-11-29 01:46:27 +0100 |
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committer | kali kaneko (leap communications) <kali@leap.se> | 2021-11-29 18:14:16 +0100 |
commit | 18f52af5be3a9a0c73811706108f790d65ee9c67 (patch) | |
tree | e13cbacb47d56919caa9c44a2b45dec1497a7860 /vendor/github.com/jtolds/gls/stack_tags_js.go | |
parent | ebcef0d57b6ecb5a40c6579f6be07182dd3033ba (diff) |
[pkg] update vendor
Diffstat (limited to 'vendor/github.com/jtolds/gls/stack_tags_js.go')
-rw-r--r-- | vendor/github.com/jtolds/gls/stack_tags_js.go | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/vendor/github.com/jtolds/gls/stack_tags_js.go b/vendor/github.com/jtolds/gls/stack_tags_js.go new file mode 100644 index 0000000..c4e8b80 --- /dev/null +++ b/vendor/github.com/jtolds/gls/stack_tags_js.go @@ -0,0 +1,75 @@ +// +build js + +package gls + +// This file is used for GopherJS builds, which don't have normal runtime +// stack trace support + +import ( + "strconv" + "strings" + + "github.com/gopherjs/gopherjs/js" +) + +const ( + jsFuncNamePrefix = "github_com_jtolds_gls_mark" +) + +func jsMarkStack() (f []uintptr) { + lines := strings.Split( + js.Global.Get("Error").New().Get("stack").String(), "\n") + f = make([]uintptr, 0, len(lines)) + for i, line := range lines { + line = strings.TrimSpace(line) + if line == "" { + continue + } + if i == 0 { + if line != "Error" { + panic("didn't understand js stack trace") + } + continue + } + fields := strings.Fields(line) + if len(fields) < 2 || fields[0] != "at" { + panic("didn't understand js stack trace") + } + + pos := strings.Index(fields[1], jsFuncNamePrefix) + if pos < 0 { + continue + } + pos += len(jsFuncNamePrefix) + if pos >= len(fields[1]) { + panic("didn't understand js stack trace") + } + char := string(fields[1][pos]) + switch char { + case "S": + f = append(f, uintptr(0)) + default: + val, err := strconv.ParseUint(char, 16, 8) + if err != nil { + panic("didn't understand js stack trace") + } + f = append(f, uintptr(val)+1) + } + } + return f +} + +// variables to prevent inlining +var ( + findPtr = func() uintptr { + funcs := jsMarkStack() + if len(funcs) == 0 { + panic("failed to find function pointer") + } + return funcs[0] + } + + getStack = func(offset, amount int) (stack []uintptr, next_offset int) { + return jsMarkStack(), 0 + } +) |